Physics Forests - A New Real-time Fluid Solver - Download demo NOW!

[anonymous_user_3375a5e9]

@Alcatraz;691815

Does it scale linearly with the particle amount, so will 100 times less particles run 100 times faster? In games you often don’t need super high accuracy.

In practice the behavior is close to linear in a range 10k-100M. (at ~120M we run out of 8GB GPU memory). It is slightly sublinear up to 1M particles, and slightly superlinear from 5M. So if particles were twice the size in every dimension, it would be approx 8x faster and might fit into those 3ms.

@Alcatraz;691815

Why do you mention the CPU here? Isn’t the fluid sim only heavy on the GPU?

Typically physics library (Havok for example) runs only on CPU. Getting GPU computing power in AAA games except for rendering might be impossible. I hope this will change in the future:)

@Alcatraz;691815

Also, you mention CUDA, if you want this to be usable in games you should make it use OpenCL, direct compute or vulkan compute so that it runs on AMD and Intel GPUs too, for now direct compute is probably the best.

We have an OpenCL version too (which was our original implementation), we switched due to better debugging tools for CUDA. We will consider other platform after we progress a bit further with the development.