velocity field from fluid to texture.

[anupamd]

I am trying to write the velocities of a simulated fluid to a 2d texture. Obviously I only care about a 2d slice of a 3d sim.

The method I am using right now is to advect particles into my fluid, then attribute transfer the velocity of the particles to point color on a flat piece of geo that is highly subdivided. Then render that geo out.

The more elegant solution which I do not know how to do would be to sim the fluid, write to a pointcloud. Then read the velocity attribute from the fluid pointcloud in a shader. But I have done no work with pointclouds and would love to see an example file of how that works in the context of a shader.

Thanks for the advice...