koobas.hobune.stream
Does Unity3D can move physical computing to GPU?
Does Unity3D can move physical computing to GPU? If not implemented now, can unity3D support it in the future? My reason is: a 2-hand GTX660ti does not exceed $ 30, but the single-precision floating-point computing power has 2.46TFlops, which is 5 times the floating-point performance of the top CPUs! And from the point of view of the Windows task manager, unity3D is difficult to make the CPU usage of the game exceed 50% while running. Therefore, it is now necessary to transfer PhysX's physical computing to the GPU (as a physical computing card). Please Unity official must consider this opinion!
I downloaded Fluid $$anonymous$$ark 1.5.2 and tested PhysX's physical computing ability. $$anonymous$$y graphics card is GTX1080ti, and the result is 250,000 particles with an average frame rate of 48 frames, so a GTX1080ti (11.5TFlops) should be able to calculate 12,000,000 particles (rigibody) per second. I also checked the floating-point computing capability of the GTX660 graphics card, it's 1881.6GFlops， almost 1/6 of 1080ti. Then the GTX660 can calculate 2 million particles per second (infer). At the situaiton of 30 frames per second, it will be 66,666 particles (rigibody) per frame. And Unity 2019.3 supports the New mid-phase function, and it can be greatly optimized to reduce a lot of calculations. So, it is time to support PhysX running on GPU. (For A$$anonymous$$D, Havok is also okay, as long as developers use the same APIs)
Unity uses the CPU version of the NVIDIA Physx engine. Since most platforms do not have support for t GPU NVIDIA Physx and even the more then half of the PC market do not support GPU NVIDIA Physx its unlikely for unity to integrate it. Im not saying it cant be done, the are on the way to integrate a version of Havok Physics via a package, so maybe there is a option.
As I know, in China, Nvidia's graphic card over 80% market share! If Unity3D offical see this you really should think about my suggestion.
Thanks for ansower my question. Whatever PhysX or Havok, as long as it supports physical acceleration caculate on the GPU, that is ok! In my game, there may be thousands of rigid bodies colliding, even my 8 cores 16 threads CPU (Only 30+% CPU usage), only have 3~5 frames per second. So this situation is becoming more and more important.
