Added preparation for GPU hardware accelerated solvers for BulletSoftBody (OpenCL and DirectCompute backends will follow)

Added assert to check for positive masses in btCompoundShape::calculatePrincipalAxisTransform, see Issue 399
Fixes for LLVM/GCC compilation issue in btSequentialImpulseConstraintSolver
(Untested) fix for Linux 64bit compilation Issue 409

src/BulletMultiThreaded/CMakeLists.txt

@@ -5,6 +5,7 @@ INCLUDE_DIRECTORIES(
 
 ADD_LIBRARY(BulletMultiThreaded
 		PlatformDefinitions.h
+		PpuAddressSpace.h
 		SpuFakeDma.cpp
 		SpuFakeDma.h
 		SpuDoubleBuffer.h

src/BulletMultiThreaded/PpuAddressSpace.h

@@ -1,3 +1,19 @@
+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2010 Erwin Coumans  http://bulletphysics.org
+
+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.
+*/
+
+
 #ifndef __PPU_ADDRESS_SPACE_H
 #define __PPU_ADDRESS_SPACE_H
 
@@ -9,13 +25,13 @@
 #endif //_WIN32
 
 
-#if defined(_WIN64) || defined(__LP64__) || defined(__x86_64__)
-typedef unsigned __int64 ppu_address_t;
+#if defined(_WIN64)
+	typedef unsigned __int64 ppu_address_t;
+#elif defined(__LP64__) || defined(__x86_64__)
+	typedef uint64_t ppu_address_t;
 #else
+	typedef uint32_t ppu_address_t;
+#endif //defined(_WIN64)
 
-typedef uint32_t ppu_address_t;
-
-#endif
-
-#endif
+#endif //__PPU_ADDRESS_SPACE_H
 

src/BulletMultiThreaded/SpuNarrowPhaseCollisionTask/SpuGatheringCollisionTask.cpp

@@ -1216,7 +1216,7 @@ void	processCollisionTask(void* userPtr, void* lsMemPtr)
 #endif											
 										)
 										{
-#define USE_PE_BOX_BOX 1
+//#define USE_PE_BOX_BOX 1
 #ifdef USE_PE_BOX_BOX
 											{