MonoGame.Extended/Source/Demos/StarWarrior/Components/HealthComponent.cs

// Original code dervied from:
// https://github.com/thelinuxlich/starwarrior_CSharp/blob/master/StarWarrior/StarWarrior/Components/HealthComponent.cs

// --------------------------------------------------------------------------------------------------------------------
// <copyright file="HealthComponent.cs" company="GAMADU.COM">
//     Copyright © 2013 GAMADU.COM. All rights reserved.
//
//     Redistribution and use in source and binary forms, with or without modification, are
//     permitted provided that the following conditions are met:
//
//        1. Redistributions of source code must retain the above copyright notice, this list of
//           conditions and the following disclaimer.
//
//        2. Redistributions in binary form must reproduce the above copyright notice, this list
//           of conditions and the following disclaimer in the documentation and/or other materials
//           provided with the distribution.
//
//     THIS SOFTWARE IS PROVIDED BY GAMADU.COM 'AS IS' AND ANY EXPRESS OR IMPLIED
//     WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
//     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GAMADU.COM OR
//     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
//     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
//     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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//     NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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//     The views and conclusions contained in the software and documentation are those of the
//     authors and should not be interpreted as representing official policies, either expressed
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// </copyright>
// <summary>
//   The health.
// </summary>
// --------------------------------------------------------------------------------------------------------------------

namespace StarWarrior.Components
{
    public class HealthComponent
    {
        private int _points;
        private int _maximumPoints;

        public int Points
        {
            get { return _points; }
            set
            {
                _points = value;
                CalculateRatio();
            }
        }

        public int MaximumPoints
        {
            get { return _maximumPoints; }
            set
            {
                _maximumPoints = value;
                CalculateRatio();
            }
        }

        public float Ratio { get; private set; }

        public bool IsAlive => Points > 0;

        public void AddDamage(int damage)
        {
            if (damage <= 0)
                return;

            _points -= damage;
            if (_points < 0)
                _points = 0;
            CalculateRatio();
        }

        private void CalculateRatio()
        {
            Ratio = (float)_points / MaximumPoints;
        }
    }
}