| /* |
| Bullet Continuous Collision Detection and Physics Library, http://bulletphysics.org |
| Copyright (C) 2006, 2009 Sony Computer Entertainment Inc. |
| |
| This software is provided 'as-is', without any express or implied warranty. |
| In no event will the authors be held liable for any damages arising from the use of this software. |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it freely, |
| subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| |
| //---------------------------------------------------------------------------------------- |
| |
| // Shared code for GPU-based utilities |
| |
| //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
| // Keep this file free from Bullet headers |
| // will be compiled by both CPU and CUDA compilers |
| // file with definitions of BT_GPU_xxx should be included first |
| //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
| |
| //---------------------------------------------------------------------------------------- |
| |
| #include "btGpuUtilsSharedDefs.h" |
| |
| //---------------------------------------------------------------------------------------- |
| |
| extern "C" |
| { |
| |
| //---------------------------------------------------------------------------------------- |
| |
| //Round a / b to nearest higher integer value |
| int BT_GPU_PREF(iDivUp)(int a, int b) |
| { |
| return (a % b != 0) ? (a / b + 1) : (a / b); |
| } // iDivUp() |
| |
| //---------------------------------------------------------------------------------------- |
| |
| // compute grid and thread block size for a given number of elements |
| void BT_GPU_PREF(computeGridSize)(int n, int blockSize, int &numBlocks, int &numThreads) |
| { |
| numThreads = BT_GPU_min(blockSize, n); |
| numBlocks = BT_GPU_PREF(iDivUp)(n, numThreads); |
| } // computeGridSize() |
| |
| //---------------------------------------------------------------------------------------- |
| |
| } // extern "C" |
| |
