Away3D Forum Particles - fade out over time

Particles - fade out over time Software: Away3D 4.x

mattmogford, Newbie Posted: 16 July 2013 03:27 PM Total Posts: 23 Hi All, I’m needing to do a simple task, alpha out each particle over time. All being the same is fine. I’ve tried… animationSet.addAnimation(new ParticleColorNode(ParticlePropertiesMode.LOCAL_STATIC)); private function initParticleParam(prop:ParticleProperties):void { //prop.startTime = prop.index * 0.005; prop.startTime = 0; prop.duration = 2; prop.delay = 0; //calculate the original position of every particle. prop[ParticlePositionNode.POSITION_VECTOR3D] = new Vector3D(Math.random() * 500, 100, 0); prop[ParticleVelocityNode.VELOCITY_VECTOR3D] = new Vector3D( Math.random() * 275, Math.random() * 275, Math.random() * 275 ); prop[ParticleColorNode.COLOR_END_COLORTRANSFORM] = new ColorTransform( 0, 0, 1, 0 ); } But I get the error : Error: there is no ColorStartColorTransform in param!
Cheng Liao, Administrator Posted: 16 July 2013 03:45 PM Total Posts: 116 [ # 1 ] This color node needs two color transforms:COLOR_START_COLORTRANSFORM and COLOR_END_COLORTRANSFORM. I need to set the COLOR_START_COLORTRANSFORM at the same time like this: `prop[ParticleColorNode.COLOR_START_COLORTRANSFORM] = new ColorTransform( 0, 0, 1, 1 );`
mattmogford, Newbie Posted: 16 July 2013 03:53 PM Total Posts: 23 [ # 2 ] Thanks for the fast reply. This sort of works, I’ll explain. Each particle is a simple sphere, with a ColorMaterial `var material:ColorMaterial = new ColorMaterial(0x0000ff, 1);` It doesn’t fade to nothing unless I set the color material alpha to 0.99. Also, how would this work with a normal texture? For example, a rock texture fading to invisible? Thanks
Cheng Liao, Administrator Posted: 16 July 2013 03:59 PM Total Posts: 116 [ # 3 ] When the alpha=1, the alphaBlending of the texture is auto set to normal, which means the alpha value will be ignored. When you use a bitmaptexture, you need to set the alphaBlending to true.
mattmogford, Newbie Posted: 16 July 2013 04:02 PM Total Posts: 23 [ # 4 ] - IGNORE THIS - Answer = ColorMaterial .alphaBlending = true; Ok excellent, so how then would I set alphaBlending = true on a ColorMaterial to make the alpha fade work? Thanks

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