ParticleMaterial

Kind of class:	public class
Package:	org.papervision3d.materials.special
Inherits from:	MaterialObject3D < EventDispatcher
Implements:	IParticleDrawer
Known subclasses:	BitmapParticleMaterial MovieAssetParticleMaterial
Classpath:	org.papervision3d.materials.special.ParticleMaterial
File last modified:	Sunday, 02 March 2008, 15:23:21

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package org.papervision3d.materials.special
{
    import flash.display.Graphics;
    
    import org.papervision3d.core.geom.renderables.Particle;
    import org.papervision3d.core.proto.MaterialObject3D;
    import org.papervision3d.core.render.data.RenderSessionData;
    import org.papervision3d.core.render.draw.IParticleDrawer;

    import flash.geom.Rectangle;    

    /**
     * @Author Ralph Hauwert
     * 
     * updated by Seb Lee-Delisle 
     *  - added size implementation
     *  - added rectangle of particle for smart culling and drawing
     * 
     */
    public class ParticleMaterial extends MaterialObject3D implements IParticleDrawer
    {
        
        
        public function ParticleMaterial(color:Number, alpha:Number)
        {
            super();
            this.fillAlpha = alpha;
            this.fillColor = color;
        }
        
        public function drawParticle(particle:Particle, graphics:Graphics, renderSessionData:RenderSessionData):void
        {
            graphics.beginFill(fillColor, fillAlpha);
            
            var renderrect:Rectangle = particle.renderRect; 
            
            graphics.drawRect(renderrect.x, renderrect.y, renderrect.width, renderrect.height);

            graphics.endFill();
            renderSessionData.renderStatistics.particles++;
        }
        
        public function updateRenderRect(particle : Particle) :void
        {
            var renderrect:Rectangle = particle.renderRect; 

            if(particle.size == 0){

                renderrect.width = 1; 
                renderrect.height = 1; 
            }else{
                renderrect.width = particle.renderScale*particle.size;
                renderrect.height = particle.renderScale*particle.size;
            }
            renderrect.x = particle.vertex3D.vertex3DInstance.x - (renderrect.width/2); 
            renderrect.y = particle.vertex3D.vertex3DInstance.y - (renderrect.width/2);
            
        }
    }
}