ScaleAffector.cs :  » Game » RealmForge » Axiom » ParticleFX » C# / CSharp Open Source

#region LGPL License
/*
Axiom Game Engine Library
Copyright (C) 2003  Axiom Project Team

The overall design, and a majority of the core engine and rendering code 
contained within this library is a derivative of the open source Object Oriented 
Graphics Engine OGRE, which can be found at http://ogre.sourceforge.net.  
Many thanks to the OGRE team for maintaining such a high quality project.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#endregion

using System;
using Axiom.Core;
using Axiom.ParticleSystems;
using Axiom.Scripting;

namespace Axiom.ParticleFX{
  /// <summary>
  /// Summary description for ScaleAffector.
  /// </summary>
  public class ScaleAffector : ParticleAffector {
    protected float scaleAdjust;

    public ScaleAffector() {
      this.type  = "Scaler";
      scaleAdjust  = 0;
    }

    public float ScaleAdjust {
      get { 
        return scaleAdjust; 
      }
      set { 
        scaleAdjust = value; 
      }
    }

    public override void AffectParticles(ParticleSystem system, float timeElapsed) {
      float ds;

      // Scale adjustments by time
      ds = scaleAdjust * timeElapsed;

      float newWide, newHigh;

      // loop through the particles

      for(int i = 0; i < system.Particles.Count; i++) {
        Particle p = (Particle)system.Particles[i];

        if( p.HasOwnDimensions == false ) {
          p.Height = system.DefaultHeight;
          p.Width = system.DefaultWidth;
        }
        else {
          newWide  = p.Width + ds;
          newHigh  = p.Height + ds;
          p.Width  = newWide;
          p.Height= newHigh;
        }
      }
    }

    #region Command definition classes

    [Command("rate", "Rate of particle scaling.", typeof(ParticleAffector))]
    class RateCommand : ICommand {
      #region ICommand Members

      public string Get(object target) {
        ScaleAffector affector = target as ScaleAffector;
        return StringConverter.ToString(affector.ScaleAdjust);
      }
      public void Set(object target, string val) {
        ScaleAffector affector = target as ScaleAffector;
        affector.ScaleAdjust = StringConverter.ParseFloat(val);
      }

      #endregion
    }

    #endregion Command definition classes
  }
}