moved the particle system and the entity component system into their own nuget packages

2026-07-24 12:06:37 +00:00 · 2017-03-07 22:08:31 +10:00
parent 1b6df14681
commit c236e6dfd5
71 changed files with 422 additions and 83 deletions
@@ -0,0 +1,36 @@
+using System;
+
+namespace MonoGame.Extended.Particles.Modifiers
+{
+    public class VelocityColorModifier : IModifier
+    {
+        public HslColor StationaryColor { get; set; }
+        public HslColor VelocityColor { get; set; }
+        public float VelocityThreshold { get; set; }
+
+        public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator)
+        {
+            var velocityThreshold2 = VelocityThreshold*VelocityThreshold;
+
+            while (iterator.HasNext)
+            {
+                var particle = iterator.Next();
+                var velocity2 = particle->Velocity.X*particle->Velocity.X +
+                                particle->Velocity.Y*particle->Velocity.Y;
+                var deltaColor = VelocityColor - StationaryColor;
+
+                if (velocity2 >= velocityThreshold2)
+                    VelocityColor.CopyTo(out particle->Color);
+                else
+                {
+                    var t = (float) Math.Sqrt(velocity2)/VelocityThreshold;
+
+                    particle->Color = new HslColor(
+                        deltaColor.H*t + StationaryColor.H,
+                        deltaColor.S*t + StationaryColor.S,
+                        deltaColor.L*t + StationaryColor.L);
+                }
+            }
+        }
+    }
+}