Updates to particle system for ember editor (#1001)

* Add enabled state for modifiers

* Add enabled state for interpolators

* Move AutoTrigger to effect not emitters

* Remove LineUniformProfile

* Set Enabled field true by default

* Don't render invisible emitters

* Remove unused member

* Document update method

* Add documentation

* Remove test now that LineUniformProfile was removed

* Fix unit tests

source/MonoGame.Extended/Particles/Modifiers/AgeModifier.cs

@@ -34,6 +34,8 @@ public class AgeModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         while (iterator.HasNext)
         {
             Particle* particle = iterator.Next();

source/MonoGame.Extended/Particles/Modifiers/Containers/CircleContainerModifier.cs

@@ -66,6 +66,8 @@ public class CircleContainerModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         float radiusSq = Radius * Radius;
 
         while (iterator.HasNext)

source/MonoGame.Extended/Particles/Modifiers/Containers/RectangleContainerModifier.cs

@@ -53,6 +53,8 @@ public sealed class RectangleContainerModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         while (iterator.HasNext)
         {
             Particle* particle = iterator.Next();

source/MonoGame.Extended/Particles/Modifiers/Containers/RectangleLoopContainerModifier.cs

@@ -32,6 +32,8 @@ public class RectangleLoopContainerModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         while (iterator.HasNext)
         {
             Particle* particle = iterator.Next();

source/MonoGame.Extended/Particles/Modifiers/DragModifier.cs

@@ -51,6 +51,8 @@ public class DragModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         while (iterator.HasNext)
         {
             Particle* particle = iterator.Next();

source/MonoGame.Extended/Particles/Modifiers/Interpolators/ColorInterpolator.cs

@@ -29,6 +29,8 @@ public sealed class ColorInterpolator : Interpolator<Vector3>
     /// <param name="particle">A pointer to the particle to update.</param>
     public override unsafe void Update(float amount, Particle* particle)
     {
+        if (!Enabled) { return; }
+
         float h = StartValue.X + (EndValue.X - StartValue.X) * amount;
         float s = StartValue.Y + (EndValue.Y - StartValue.Y) * amount;
         float l = StartValue.Z + (EndValue.Z - StartValue.Z) * amount;

source/MonoGame.Extended/Particles/Modifiers/Interpolators/HueInterpolator.cs

@@ -23,6 +23,8 @@ public class HueInterpolator : Interpolator<float>
     /// <param name="particle">A pointer to the particle to update.</param>
     public override unsafe void Update(float amount, Particle* particle)
     {
+        if (!Enabled) { return; }
+
         float h = StartValue + (EndValue - StartValue) * amount;
         particle->Color[0] = h;
     }

source/MonoGame.Extended/Particles/Modifiers/Interpolators/Interpolator.cs

@@ -22,12 +22,22 @@ public abstract class Interpolator
     /// </summary>
     public string Name;
 
+    /// <summary>
+    /// Indicates if this interpolator is enabled.
+    /// </summary>
+    /// <remarks>
+    /// This value determines if this interpolator is enabled.  When an interpolator is disabled, the interpolator is
+    /// not applied to the modifier.
+    /// </remarks>
+    public bool Enabled;
+
     /// <summary>
     /// Initializes a new instance of the <see cref="Interpolator"/> class.
     /// </summary>
     protected Interpolator()
     {
         Name = GetType().Name;
+        Enabled = true;
     }
 
     /// <summary>

source/MonoGame.Extended/Particles/Modifiers/Interpolators/OpacityInterpolator.cs

@@ -28,6 +28,8 @@ public class OpacityInterpolator : Interpolator<float>
     /// <param name="particle">A pointer to the particle to update.</param>
     public override unsafe void Update(float amount, Particle* particle)
     {
+        if (!Enabled) { return; }
+
         particle->Opacity = StartValue + (EndValue - StartValue) * amount;
     }
 }

source/MonoGame.Extended/Particles/Modifiers/Interpolators/RotationInterpolator.cs

@@ -23,6 +23,8 @@ public class RotationInterpolator : Interpolator<float>
     /// <param name="particle">A pointer to the particle to update.</param>
     public override unsafe void Update(float amount, Particle* particle)
     {
+        if (!Enabled) { return; }
+
         particle->Rotation = StartValue + (EndValue - StartValue) * amount;
     }
 }

source/MonoGame.Extended/Particles/Modifiers/Interpolators/ScaleInterpolator.cs

@@ -24,6 +24,8 @@ public class ScaleInterpolator : Interpolator<Vector2>
     /// <param name="particle">A pointer to the particle to update.</param>
     public override unsafe void Update(float amount, Particle* particle)
     {
+        if (!Enabled) { return; }
+
         particle->Scale[0] = StartValue.X + (EndValue.X - StartValue.X) * amount;
         particle->Scale[1] = StartValue.Y + (EndValue.Y - StartValue.Y) * amount;
     }

source/MonoGame.Extended/Particles/Modifiers/Interpolators/VelocityInterpolator.cs

@@ -24,6 +24,8 @@ public class VelocityInterpolator : Interpolator<Vector2>
     /// <param name="particle">A pointer to the particle to update.</param>
     public override unsafe void Update(float amount, Particle* particle)
     {
+        if (!Enabled) { return; }
+
         particle->Velocity[0] = StartValue.X + (EndValue.X - StartValue.X) * amount;
         particle->Velocity[1] = StartValue.Y + (EndValue.Y - StartValue.Y) * amount;
     }

source/MonoGame.Extended/Particles/Modifiers/LinearGravityModifier.cs

@@ -43,6 +43,8 @@ public class LinearGravityModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         Vector2 vector = Direction * (Strength * elapsedSeconds);
 
         while (iterator.HasNext)

source/MonoGame.Extended/Particles/Modifiers/Modifier.cs

@@ -17,8 +17,6 @@ public abstract class Modifier
 {
     private const float DEFAULT_MODIFIER_FREQUENCY = 60.0f;
 
-    private int _particlesUpdatedThisCycle;
-
     /// <summary>
     /// Gets or sets the display name of this modifier.
     /// </summary>
@@ -44,6 +42,15 @@ public abstract class Modifier
     /// </remarks>
     public float Frequency;
 
+    /// <summary>
+    /// Indicates whether this modifier is enabled.
+    /// </summary>
+    /// <remarks>
+    /// This value determines if this modifier is enabled.  When a modifier is disabled, the modifier is not applied
+    /// to the particles.
+    /// </remarks>
+    public bool Enabled;
+
     /// <summary>
     /// Initializes a new instance of the <see cref="Modifier"/> class.
     /// </summary>
@@ -55,6 +62,7 @@ public abstract class Modifier
     {
         Name = GetType().Name;
         Frequency = DEFAULT_MODIFIER_FREQUENCY;
+        Enabled = true;
     }
 
     /// <summary>

source/MonoGame.Extended/Particles/Modifiers/OpacityFastFadeModifier.cs

@@ -34,6 +34,8 @@ public sealed class OpacityFastFadeModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         while (iterator.HasNext)
         {
             Particle* particle = iterator.Next();

source/MonoGame.Extended/Particles/Modifiers/RotationModifier.cs

@@ -34,6 +34,8 @@ public class RotationModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         float rotationRateDelta = RotationRate * elapsedSeconds;
 
         while (iterator.HasNext)

source/MonoGame.Extended/Particles/Modifiers/VelocityColorModifier.cs

@@ -60,6 +60,8 @@ public class VelocityColorModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         float velocityThreshold2 = VelocityThreshold * VelocityThreshold;
 
         while (iterator.HasNext)

source/MonoGame.Extended/Particles/Modifiers/VelocityModifier.cs

@@ -40,6 +40,8 @@ public class VelocityModifier : Modifier
     /// <inheritdoc />
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         float velocityThreshold2 = VelocityThreshold * VelocityThreshold;
 
         while (iterator.HasNext)

source/MonoGame.Extended/Particles/Modifiers/VortexModifier.cs

@@ -54,6 +54,8 @@ public unsafe class VortexModifier : Modifier
     /// <inheritdoc/>
     public override unsafe void Update(float elapsedSeconds, ParticleIterator iterator)
     {
+        if (!Enabled) { return; }
+
         while (iterator.HasNext)
         {
             Particle* particle = iterator.Next();

source/MonoGame.Extended/Particles/ParticleEffect.cs

@@ -23,6 +23,8 @@ namespace MonoGame.Extended.Particles;
 /// </remarks>
 public class ParticleEffect : IDisposable
 {
+    private float _nextAutoTrigger;
+
     /// <summary>
     /// Gets or sets the name of this effect, used for identification and debugging.
     /// </summary>
@@ -55,6 +57,24 @@ public class ParticleEffect : IDisposable
     /// </remarks>
     public Vector2 Scale;
 
+    /// <summary>
+    /// A value indicating whether this particle effect should automatically trigger its particle emitters.
+    /// </summary>
+    /// <remarks>
+    /// When <see langword="true"/>, all emitters of this <see cref="ParticleEffect"/> will be triggered  at the same
+    /// based on the <see cref="AutoTriggerFrequency"/>.  When <see langword="false"/>, users will need to manually call
+    /// the <see cref="Trigger()"/> method to trigger emitters.
+    /// </remarks>
+    public bool AutoTrigger;
+
+    /// <summary>
+    /// The frequency, in seconds, at which this <see cref="ParticleEffect"/> automatically triggers emitters.
+    /// </summary>
+    /// <remarks>
+    /// If <see cref="AutoTrigger"/> is <see langword="false"/>, this value is ignored.
+    /// </remarks>
+    public float AutoTriggerFrequency;
+
     /// <summary>
     /// Gets or sets the collection of emitters that compose this effect.
     /// </summary>
@@ -97,6 +117,8 @@ public class ParticleEffect : IDisposable
         Rotation = 0.0f;
         Scale = Vector2.One;
         Emitters = new List<ParticleEmitter>();
+        AutoTrigger = true;
+        AutoTriggerFrequency = 1.0f;
     }
 
     /// <summary>
@@ -128,6 +150,13 @@ public class ParticleEffect : IDisposable
         }
     }
 
+    /// <summary>
+    /// Updates the state of all emitters in this effect.
+    /// </summary>
+    /// <param name="gameTime">The timing values for the current update cycle.</param>
+    /// <exception cref="ObjectDisposedException">
+    /// Thrown if this method is called after the effect has been disposed.
+    /// </exception>
     public void Update(GameTime gameTime)
     {
         Update((float)gameTime.ElapsedGameTime.TotalSeconds);
@@ -137,10 +166,6 @@ public class ParticleEffect : IDisposable
     /// Updates the state of all emitters in this effect.
     /// </summary>
     /// <param name="elapsedSeconds">The elapsed time, in seconds, since the last update.</param>
-    /// <remarks>
-    /// This method propagates the update call to each emitter in the effect, passing along
-    /// the elapsed time and the current position of the effect.
-    /// </remarks>
     /// <exception cref="ObjectDisposedException">
     /// Thrown if this method is called after the effect has been disposed.
     /// </exception>
@@ -148,6 +173,17 @@ public class ParticleEffect : IDisposable
     {
         ObjectDisposedException.ThrowIf(IsDisposed, typeof(ParticleBuffer));
 
+        if (AutoTrigger)
+        {
+            _nextAutoTrigger -= elapsedSeconds;
+
+            if (_nextAutoTrigger <= 0)
+            {
+                Trigger();
+                _nextAutoTrigger += AutoTriggerFrequency;
+            }
+        }
+
         for (int i = 0; i < Emitters.Count; i++)
         {
             Emitters[i].Update(elapsedSeconds, Position);

source/MonoGame.Extended/Particles/ParticleEffectReader.cs

@@ -34,12 +34,12 @@ public sealed class ParticleEffectReader : IDisposable
     public bool IsDisposed { get; private set; }
 
     /// <summary>
-    /// Initializes a new instance of the <see cref="ParticleEffectReader"/> class that reads from a file. 
+    /// Initializes a new instance of the <see cref="ParticleEffectReader"/> class that reads from a file.
     /// </summary>
     /// <param name="fileName">The file path to read the XMl from.</param>
     /// <param name="content">The <see cref="ContentManager"/> to use for loading textures.</param>
     /// <exception cref="ArgumentNullException"><paramref name="content"/> is <see langword="null"/></exception>
-    /// <exception cref="ArgumentException"><paramref name="fileName"/> is <see langword="null"/> or empty.</exception>  
+    /// <exception cref="ArgumentException"><paramref name="fileName"/> is <see langword="null"/> or empty.</exception>
     public ParticleEffectReader(string fileName, ContentManager content)
     {
         ArgumentNullException.ThrowIfNull(content);
@@ -97,8 +97,11 @@ public sealed class ParticleEffectReader : IDisposable
         string name = _reader.GetAttribute(nameof(ParticleEffect.Name)) ?? "Unnamed";
         ParticleEffect effect = new ParticleEffect(name);
 
+        effect.Position = _reader.GetAttributeVector2(nameof(ParticleEffect.Position));
         effect.Rotation = _reader.GetAttributeFloat(nameof(ParticleEffect.Rotation));
         effect.Scale = _reader.GetAttributeVector2(nameof(ParticleEffect.Scale));
+        effect.AutoTrigger = _reader.GetAttributeBool(nameof(ParticleEffect.AutoTrigger));
+        effect.AutoTriggerFrequency = _reader.GetAttributeFloat(nameof(ParticleEffect.AutoTriggerFrequency));
 
         if (_reader.ReadToDescendant(nameof(ParticleEffect.Emitters)))
         {
@@ -124,8 +127,6 @@ public sealed class ParticleEffectReader : IDisposable
         emitter.LifeSpan = _reader.GetAttributeFloat(nameof(ParticleEmitter.LifeSpan));
         emitter.Offset = _reader.GetAttributeVector2(nameof(ParticleEmitter.Offset));
         emitter.LayerDepth = _reader.GetAttributeFloat(nameof(ParticleEmitter.LayerDepth));
-        emitter.AutoTrigger = _reader.GetAttributeBool(nameof(ParticleEmitter.AutoTrigger));
-        emitter.AutoTriggerFrequency = _reader.GetAttributeFloat(nameof(ParticleEmitter.AutoTriggerFrequency));
         emitter.ReclaimFrequency = _reader.GetAttributeFloat(nameof(ParticleEmitter.ReclaimFrequency));
 
         string strategy = _reader.GetAttribute(nameof(ParticleEmitter.ModifierExecutionStrategy));
@@ -400,13 +401,6 @@ public sealed class ParticleEffectReader : IDisposable
                 lineProfile.Length = reader.GetAttributeFloat(nameof(LineProfile.Length));
                 return lineProfile;
 
-            case nameof(LineUniformProfile):
-                LineUniformProfile lineUniformProfile = new LineUniformProfile();
-                lineUniformProfile.Axis = reader.GetAttributeVector2(nameof(LineUniformProfile.Axis));
-                lineUniformProfile.Length = reader.GetAttributeFloat(nameof(LineUniformProfile.Length));
-                lineUniformProfile.PerpendicularDirection = reader.GetAttributeVector2(nameof(LineUniformProfile.PerpendicularDirection));
-                return lineUniformProfile;
-
             case nameof(PointProfile):
                 return Profile.Point();
 

source/MonoGame.Extended/Particles/ParticleEffectWriter.cs

@@ -75,6 +75,8 @@ public class ParticleEffectWriter : IDisposable
         _writer.WriteAttributeVector2(nameof(ParticleEffect.Position), effect.Position);
         _writer.WriteAttributeFloat(nameof(ParticleEffect.Rotation), effect.Rotation);
         _writer.WriteAttributeVector2(nameof(ParticleEffect.Scale), effect.Scale);
+        _writer.WriteAttributeBool(nameof(ParticleEffect.AutoTrigger), effect.AutoTrigger);
+        _writer.WriteAttributeFloat(nameof(ParticleEffect.AutoTriggerFrequency), effect.AutoTriggerFrequency);
 
         if (effect.Emitters.Count > 0)
         {
@@ -100,8 +102,6 @@ public class ParticleEffectWriter : IDisposable
         _writer.WriteAttributeFloat(nameof(ParticleEmitter.LifeSpan), emitter.LifeSpan);
         _writer.WriteAttributeVector2(nameof(ParticleEmitter.Offset), emitter.Offset);
         _writer.WriteAttributeFloat(nameof(ParticleEmitter.LayerDepth), emitter.LayerDepth);
-        _writer.WriteAttributeBool(nameof(ParticleEmitter.AutoTrigger), emitter.AutoTrigger);
-        _writer.WriteAttributeFloat(nameof(ParticleEmitter.AutoTriggerFrequency), emitter.AutoTriggerFrequency);
         _writer.WriteAttributeFloat(nameof(ParticleEmitter.ReclaimFrequency), emitter.ReclaimFrequency);
         _writer.WriteAttributeInt(nameof(ParticleEmitter.Capacity), emitter.Capacity);
         _writer.WriteAttributeString(nameof(ParticleEmitter.ModifierExecutionStrategy), emitter.ModifierExecutionStrategy.ToString());
@@ -261,13 +261,6 @@ public class ParticleEffectWriter : IDisposable
                 _writer.WriteAttributeFloat(nameof(LineProfile.Length), lineProfile.Length);
                 break;
 
-            case LineUniformProfile lineUniformProfile:
-                _writer.WriteAttributeString(nameof(Type), nameof(LineUniformProfile));
-                _writer.WriteAttributeVector2(nameof(LineUniformProfile.Axis), lineUniformProfile.Axis);
-                _writer.WriteAttributeFloat(nameof(LineUniformProfile.Length), lineUniformProfile.Length);
-                _writer.WriteAttributeVector2(nameof(LineUniformProfile.PerpendicularDirection), lineUniformProfile.PerpendicularDirection);
-                break;
-
             case PointProfile:
                 _writer.WriteAttributeString(nameof(Type), nameof(PointProfile));
                 break;

source/MonoGame.Extended/Particles/ParticleEmitter.cs

@@ -26,7 +26,6 @@ public sealed unsafe class ParticleEmitter : IDisposable
 {
     private float _totalSeconds;
     private float _secondsSinceLastReclaim;
-    private float _nextAutoTrigger;
 
     /// <summary>
     /// Gets or sets the buffer that stores and manages the particles for this emitter.
@@ -88,23 +87,6 @@ public sealed unsafe class ParticleEmitter : IDisposable
     /// </remarks>
     public float LayerDepth;
 
-    /// <summary>
-    /// Gets or sets a value indicating whether this emitter should automatically trigger particle emissions.
-    /// </summary>
-    /// <remarks>
-    /// When set to <see langword="true"/>, the emitter will periodically emit particles based on the
-    /// <see cref="AutoTriggerFrequency"/> property, without requiring explicit calls to <see cref="Trigger(Vector2, float)"/>.
-    /// </remarks>
-    public bool AutoTrigger;
-
-    /// <summary>
-    /// Gets or sets the frequency, in seconds, at which this emitter automatically triggers particle emissions.
-    /// </summary>
-    /// <remarks>
-    /// This property only has an effect when <see cref="AutoTrigger"/> is set to <see langword="true"/>.
-    /// </remarks>
-    public float AutoTriggerFrequency;
-
     /// <summary>
     /// Gets or sets the frequency, in times per second, at which expired particles are reclaimed.
     /// </summary>
@@ -162,6 +144,11 @@ public sealed unsafe class ParticleEmitter : IDisposable
     /// </remarks>
     public ParticleRenderingOrder RenderingOrder;
 
+    /// <summary>
+    /// Indicates whether the particles emitted by this emitter are visible.
+    /// </summary>
+    public bool Visible;
+
     /// <summary>
     /// Gets a value indicating whether this <see cref="ParticleEmitter"/> has been disposed.
     /// </summary>
@@ -197,8 +184,7 @@ public sealed unsafe class ParticleEmitter : IDisposable
         ReclaimFrequency = 60.0f;
         Offset = Vector2.Zero;
         LayerDepth = 0.0f;
-        AutoTrigger = true;
-        AutoTriggerFrequency = 1.0f;
+        Visible = true;
     }
 
     /// <summary>
@@ -256,17 +242,6 @@ public sealed unsafe class ParticleEmitter : IDisposable
         _totalSeconds += elapsedSeconds;
         _secondsSinceLastReclaim += elapsedSeconds;
 
-        if (AutoTrigger)
-        {
-            _nextAutoTrigger -= elapsedSeconds;
-
-            if (_nextAutoTrigger <= 0)
-            {
-                Trigger(position, LayerDepth);
-                _nextAutoTrigger = AutoTriggerFrequency;
-            }
-        }
-
         if (Buffer.Count == 0)
         {
             return;

source/MonoGame.Extended/Particles/Profiles/LineUniformProfile.cs

@@ -1,58 +0,0 @@
-// Copyright (c) Craftwork Games. All rights reserved.
-// Licensed under the MIT license.
-// See LICENSE file in the project root for full license information.
-
-using Microsoft.Xna.Framework;
-
-namespace MonoGame.Extended.Particles.Profiles;
-
-/// <summary>
-/// A profile that distributes particles uniformly along a line segment with a fixed heading direction.
-/// </summary>
-/// <remarks>
-/// The <see cref="LineUniformProfile"/> positions particles randomly along a line segment centered at the emitter
-/// position and defined by an axis direction and length. Unlike other profiles, this profile uses a fixed heading
-/// direction for all particles, perpendicular to the line.
-/// </remarks>
-public sealed class LineUniformProfile : Profile
-{
-    /// <summary>
-    /// The direction vector of the line axis.
-    /// </summary>
-    public Vector2 Axis;
-
-    /// <summary>
-    /// The length of the line segment.
-    /// </summary>
-    public float Length;
-
-    /// <summary>
-    /// The fixed heading direction for all particles spawned from this profile.
-    /// </summary>
-    public Vector2 PerpendicularDirection;
-
-    /// <summary>
-    /// Computes the offset and heading for a new particle.
-    /// </summary>
-    /// <param name="offset">A pointer to the Vector2 where the offset from the emitter position will be stored.</param>
-    /// <param name="heading">A pointer to the Vector2 where the unit direction vector will be stored.</param>
-    public override unsafe void GetOffsetAndHeading(Vector2* offset, Vector2* heading)
-    {
-        // 1. Spawn the particle at a random point on the line axis
-        float value = FastRandom.Shared.NextSingle(Length * -0.5f, Length * 0.5f);
-        offset->X = Axis.X * value;
-        offset->Y = Axis.Y * value;
-
-        // 2. Set the heading to the perpendicular direction
-        *heading = PerpendicularDirection;
-    }
-
-    /// <summary>
-    /// Sets the <see cref="PerpendicularDirection"/> property to a normalized version of the specified vector.
-    /// </summary>
-    /// <param name="direction">The direction vector to normalize and use as the perpendicular direction.</param>
-    public void SetPerpendicularDirection(Vector2 direction)
-    {
-        PerpendicularDirection = Vector2.Normalize(direction);
-    }
-}

source/MonoGame.Extended/Particles/Profiles/Profile.cs

@@ -43,18 +43,6 @@ public abstract class Profile
         return new LineProfile { Axis = axis, Length = length };
     }
 
-    /// <summary>
-    /// Creates a <see cref="LineUniformProfile"/> that emits particles uniformly along a line segment with a fixed heading.
-    /// </summary>
-    /// <param name="axis">The direction vector of the line axis.</param>
-    /// <param name="length">The length fo the line segment.</param>
-    /// <param name="perpendicularDirection">The fixed heading direction for all particles spawned from the profile.</param>
-    /// <returns></returns>
-    public static Profile LineUniform(Vector2 axis, float length, Vector2 perpendicularDirection)
-    {
-        return new LineUniformProfile { Axis = axis, Length = length, PerpendicularDirection = perpendicularDirection };
-    }
-
     /// <summary>
     /// Creates a <see cref="RingProfile"/> that emits particles from the perimeter of a circle.
     /// </summary>

source/MonoGame.Extended/Particles/SpriteBatchExtensions.ParticleEfffect.cs

@@ -1,5 +1,4 @@
 using System;
-
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using MonoGame.Extended.Graphics;
@@ -7,8 +6,18 @@ using MonoGame.Extended.Particles.Data;
 
 namespace MonoGame.Extended.Particles;
 
+/// <summary>
+/// Provides extension methods for <see cref="SpriteBatch"/> to draw particle effects and emitters.
+/// </summary>
 public static class SpriteBatchExtensions
 {
+    /// <summary>
+    /// Draws a particle effect by rendering all of its active emitters.
+    /// </summary>
+    /// <param name="spriteBatch">The <see cref="SpriteBatch"/> used for drawing.</param>
+    /// <param name="effect">The <see cref="ParticleEffect"/> to draw.</param>
+    /// <exception cref="ArgumentNullException">Thrown when <paramref name="effect"/> is null.</exception>
+    /// <exception cref="ObjectDisposedException">Thrown when <paramref name="effect"/> is disposed.</exception>
     public static void Draw(this SpriteBatch spriteBatch, ParticleEffect effect)
     {
         ArgumentNullException.ThrowIfNull(effect);
@@ -20,6 +29,13 @@ public static class SpriteBatchExtensions
         }
     }
 
+    /// <summary>
+    /// Draws a particle emitter by rendering all of its active particles.
+    /// </summary>
+    /// <param name="spriteBatch">The <see cref="SpriteBatch"/> used for drawing.</param>
+    /// <param name="emitter">The <see cref="ParticleEmitter"/> to draw.</param>
+    /// <exception cref="ArgumentNullException">Thrown when <paramref name="emitter"/> is null.</exception>
+    /// <exception cref="ObjectDisposedException">Thrown when <paramref name="emitter"/> is disposed.</exception>
     public static void Draw(this SpriteBatch spriteBatch, ParticleEmitter emitter)
     {
         ArgumentNullException.ThrowIfNull(emitter);
@@ -43,6 +59,12 @@ public static class SpriteBatchExtensions
             return;
         }
 
+        // Early exit if the emitter is not visible
+        if (!emitter.Visible)
+        {
+            return;
+        }
+
         Texture2DRegion region = emitter.TextureRegion;
         Texture2D texture = region.Texture;
         Rectangle sourceRect = region.Bounds;

tests/MonoGame.Extended.Tests/Particles/ParticleEffectReaderTests.cs

@@ -61,7 +61,7 @@ public class ParticleEffectReaderTests
         string xml =
             """
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="EmptyEffect" Position="0,0" Rotation="0" Scale="1,1" />
+            <ParticleEffect Name="EmptyEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1" />
             """;
 
         ParticleEffect effect = ReadParticleEffectFromXml(xml);
@@ -71,6 +71,8 @@ public class ParticleEffectReaderTests
         Assert.Equal(0.0f, effect.Rotation);
         Assert.Equal(Vector2.One, effect.Scale);
         Assert.Empty(effect.Emitters);
+        Assert.True(effect.AutoTrigger);
+        Assert.Equal(effect.AutoTriggerFrequency, 1.0f);
     }
 
     [Fact]
@@ -79,9 +81,9 @@ public class ParticleEffectReaderTests
         string xml =
             $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="EmptyModifiers" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="EmptyModifiers" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -111,9 +113,9 @@ public class ParticleEffectReaderTests
         string xml =
             $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -147,9 +149,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -181,9 +183,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -215,9 +217,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -249,9 +251,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -283,9 +285,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -311,49 +313,15 @@ public class ParticleEffectReaderTests
         Assert.Equal(1.0f, profile.Length);
     }
 
-    [Fact]
-    public void ReadParticleEffect_LineUniformProfile_ReadsExpected()
-    {
-        string xml =
-           $"""
-            <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
-              <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
-                  <Parameters>
-                    <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
-                    <Speed Kind="Random" RandomMin="50" RandomMax="100" />
-                    <Color Kind="Constant" Constant="1,1,1" />
-                    <Opacity Kind="Random" RandomMin="0" RandomMax="1" />
-                    <Scale Kind="Random" RandomMin="0.5,0.5" RandomMax="1,1" />
-                    <Rotation Kind="Random" RandomMin="{-MathF.PI}" RandomMax="{MathF.PI}" />
-                    <Mass Kind="Constant" Constant="1" />
-                  </Parameters>
-                  <Profile Type="LineUniformProfile" Axis="1,1" Length="1" PerpendicularDirection="1,1" />
-                </ParticleEmitter>
-              </Emitters>
-            </ParticleEffect>
-            """;
-
-        ParticleEffect effect = ReadParticleEffectFromXml(xml);
-
-        Assert.Single(effect.Emitters);
-        ParticleEmitter emitter = effect.Emitters[0];
-
-        LineUniformProfile profile = Assert.IsType<LineUniformProfile>(emitter.Profile);
-        Assert.Equal(Vector2.One, profile.Axis);
-        Assert.Equal(1.0f, profile.Length);
-    }
-
     [Fact]
     public void ReadParticleEffect_PointProfile_ReadsExpected()
     {
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -383,9 +351,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -417,9 +385,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -451,9 +419,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -490,9 +458,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -532,9 +500,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -573,9 +541,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -614,9 +582,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -653,9 +621,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -695,9 +663,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -736,9 +704,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -776,9 +744,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -818,9 +786,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -858,9 +826,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -900,9 +868,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -946,9 +914,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -992,9 +960,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -1038,9 +1006,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -1084,9 +1052,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -1130,9 +1098,9 @@ public class ParticleEffectReaderTests
         string xml =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />

tests/MonoGame.Extended.Tests/Particles/ParticleEffectWriterTests.cs

@@ -31,7 +31,7 @@ public class ParticleEffectWriterTests
         string expected =
             $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="EmptyEffect" Position="0,0" Rotation="0" Scale="1,1" />
+            <ParticleEffect Name="EmptyEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1" />
             """;
 
         AssertParticleEffect(effect, expected);
@@ -48,9 +48,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="EmptyModifiers" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="EmptyModifiers" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -82,9 +82,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -119,9 +119,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -153,9 +153,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -187,9 +187,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -221,9 +221,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -255,9 +255,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -276,40 +276,6 @@ public class ParticleEffectWriterTests
         AssertParticleEffect(effect, expected);
     }
 
-    [Fact]
-    public void WriteParticleEffect_LineUniformProfile_WritesExpected()
-    {
-        ParticleEffect effect = new ParticleEffect("TestEffect");
-        ParticleEmitter emitter = new ParticleEmitter(1);
-        emitter.Name = "TestEmitter";
-        emitter.Profile = Profile.LineUniform(Vector2.One, 1.0f, Vector2.One);
-        effect.Emitters.Add(emitter);
-
-
-        string expected =
-           $"""
-            <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
-              <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
-                  <Parameters>
-                    <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
-                    <Speed Kind="Random" RandomMin="50" RandomMax="100" />
-                    <Color Kind="Constant" Constant="1,1,1" />
-                    <Opacity Kind="Random" RandomMin="0" RandomMax="1" />
-                    <Scale Kind="Random" RandomMin="0.5,0.5" RandomMax="1,1" />
-                    <Rotation Kind="Random" RandomMin="{-MathF.PI}" RandomMax="{MathF.PI}" />
-                    <Mass Kind="Constant" Constant="1" />
-                  </Parameters>
-                  <Profile Type="LineUniformProfile" Axis="1,1" Length="1" PerpendicularDirection="1,1" />
-                </ParticleEmitter>
-              </Emitters>
-            </ParticleEffect>
-            """;
-
-        AssertParticleEffect(effect, expected);
-    }
-
     [Fact]
     public void WriteParticleEffect_PointProfile_WritesExpected()
     {
@@ -323,9 +289,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -357,9 +323,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -391,9 +357,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -427,9 +393,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -466,9 +432,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -505,9 +471,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -544,9 +510,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -583,9 +549,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -622,9 +588,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -661,9 +627,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -700,9 +666,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -739,9 +705,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -778,9 +744,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -817,9 +783,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -858,9 +824,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -903,9 +869,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -948,9 +914,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -993,9 +959,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -1038,9 +1004,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />
@@ -1083,9 +1049,9 @@ public class ParticleEffectWriterTests
         string expected =
            $"""
             <?xml version="1.0" encoding="utf-8"?>
-            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1">
+            <ParticleEffect Name="TestEffect" Position="0,0" Rotation="0" Scale="1,1" AutoTrigger="True" AutoTriggerFrequency="1">
               <Emitters>
-                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" AutoTrigger="True" AutoTriggerFrequency="1" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
+                <ParticleEmitter Name="TestEmitter" LifeSpan="1" Offset="0,0" LayerDepth="0" ReclaimFrequency="60" Capacity="1" ModifierExecutionStrategy="Serial" RenderingOrder="FrontToBack">
                   <Parameters>
                     <Quantity Kind="Random" RandomMin="5" RandomMax="100" />
                     <Speed Kind="Random" RandomMin="50" RandomMax="100" />