Particle Engine Not Displaying

[Will Piovano]

I have a problem with the particle emitter in C#. This is practically identical to the tutorial code, and yet I cannot get the thing to display (it runs fine, but it doesn't display the pe at the origin).

Code: Select all

IParticleSystemSceneNode ps = smgr.AddParticleSystemSceneNode(
                false, null, -10, new Vector3D(0, 0, 0), new Vector3D(), new Vector3D(2, 2, 2));

            ps.ParticleSize = new Dimension2Df(40, 40);

            IParticleEmitter em = ps.CreateBoxEmitter(
                new Box3D(-20, 0, -20, 20, 10, 20), new Vector3D(0.0f, 0.03f, 0.0f),
                80, 100,
                new Irrlicht.Video.Color(0, 255, 0, 255), new Irrlicht.Video.Color(0, 255, 255, 255),
                800, 2000, 0);

            IParticleAffector paf =
                ps.CreateFadeOutParticleAffector(new Irrlicht.Video.Color(), 1500);

            ps.AddAffector(paf);

            ps.SetMaterialFlag(MaterialFlag.LIGHTING, false);
            ps.SetMaterialTexture(0,
                driver.GetTexture("C:/Irrlicht/irrlicht-1.1/media/particle.bmp"));
            ps.SetMaterialType(MaterialType.TRANSPARENT_VERTEX_ALPHA); 

Any ideas?

Thanks in advance.

[esaptonor]

are you getting any errors in the command line box? Is it managing to load the texture?

[vitek]

Yes, your box emitter creates particles that are completely transparent in color. The first parameter passed to the Color constructor is the opacity. If you set opacity to 0, the color is completely transparent.

Travis

[Will Piovano]

Hey, you have a good point there, even though both the C++ and C# tuts put opacity 0 for some reason... unless I'm looking at the wrong thing, and I prob am, cause I tried changing the values and still nothing displays:

Code: Select all

IParticleEmitter em = ps.CreateBoxEmitter(
                new Box3D(-20, 0, -20, 20, 10, 20), new Vector3D(0.0f, 0.03f, 0.0f),
                80, 100,
                new Irrlicht.Video.Color(50, 255, 0, 255), new Irrlicht.Video.Color(100, 255, 255, 255),
                800, 2000, 0);
            IParticleAffector paf =
                ps.CreateFadeOutParticleAffector(new Irrlicht.Video.Color(255), 1500);

I tried different values, and also left the constructor params empty for ParticleAffector, but nothing. The texture doesn't seem to be the problem. I don't have the console up but I tried a texture which loads on other models in the world.

Is that the value you meant?

[vitek]

I noticed that you are not setting the particle systems particle emitter. I don't think any particles are being emitted because of this. You need to write ps.SetEmitter(em) after creating the box emitter.

Other things that you could check... Are you absolutely sure that the driver.GetTexture() call is loading the texture? You will probably need to use the TRANSPARENT_ADD_COLOR material. You will most likely need to change the parameter passed to the fade out affector again.

Travis

[Will Piovano]

ps.setEmitter() does it!! Thanks Travis!

It's really weird that the example code works tho... I must have missed something at some point. Ah well, what matters is that it works!

Thanks again!