Paint With Particles

[nikaragua]

hello , how could i paint on texture with particles ?

[duncanbrinsmead]

One could use a fluidTexture2D node with the solving disabled: Density = off, velocity = OFF, ColorMethod = "static grid". This provides a texture which has a paintable color grid( set the fluid resolution to the desired image resolution).
In a particle expression one can use the collision events to get the uv of the surface the particle collides with. One can then set the color at that location using setFluidAttr. The values for xIndex and yIndex should be the u/fluidShape.resolutionX, v/fluidShape.resolutionY.

If desired one can also do various simulations with the fluid for effects like ripples+dripping or paint bleeding.

Duncan

[nikaragua]

oh, thanx a lot

[patrusk]

Hello, I'm trying to do basically the same thing. (Simulating a meteor shower hitting a spacecraft) I just want to be able to sample where the particles are hitting the surface. Once I know how to do that, I think I can figure out everything else. Unfortunately, Duncan's reply was a little cryptic. Can anyone else explain it a little better for me?

Thanks!

[patrusk]

Still no takers, huh?

[joojaa]

Read manual on particle collision events

[patrusk]

QUOTE(Joojaa @ 08/22/08, 11:30 AM) [snapback]290235[/snapback]
Read manual on particle collision events

Uhm, nothing I found in the manual covers what I'm looking for. I already know how to make more particles when they collide with something. That's useful, but it's not all of what I want to do.

Maybe what I'm looking for is more of a materials/rendering sort of question.

[joojaa]

QUOTE(patrusk @ 02/16/09, 07:49 AM) [snapback]300952[/snapback]
Uhm, nothing I found in the manual covers what I'm looking for.

Then you need to clarify what your looking for.