573 lines
17 KiB
C++
573 lines
17 KiB
C++
/*
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Copyright (c) 2003-2009 Erwin Coumans http://bullet.googlecode.com
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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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.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef BT_SCALAR_H
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#define BT_SCALAR_H
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#ifdef BT_MANAGED_CODE
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//Aligned data types not supported in managed code
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#pragma unmanaged
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#endif
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#include <float.h>
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#include <math.h>
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#include <stdlib.h> //size_t for MSVC 6.0
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#include <stdint.h>
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/* SVN $Revision$ on $Date$ from http://bullet.googlecode.com*/
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#define BT_BULLET_VERSION 279
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// -- GODOT start --
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namespace VHACD {
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// -- GODOT end --
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inline int32_t btGetVersion()
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{
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return BT_BULLET_VERSION;
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}
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// -- GODOT start --
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}; // namespace VHACD
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// -- GODOT end --
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#if defined(DEBUG) || defined(_DEBUG)
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#define BT_DEBUG
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#endif
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#ifdef _WIN32
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#if defined(__MINGW32__) || defined(__CYGWIN__) || (defined(_MSC_VER) && _MSC_VER < 1300)
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#define SIMD_FORCE_INLINE inline
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#define ATTRIBUTE_ALIGNED16(a) a
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#define ATTRIBUTE_ALIGNED64(a) a
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#define ATTRIBUTE_ALIGNED128(a) a
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#else
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//#define BT_HAS_ALIGNED_ALLOCATOR
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#pragma warning(disable : 4324) // disable padding warning
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// #pragma warning(disable:4530) // Disable the exception disable but used in MSCV Stl warning.
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// #pragma warning(disable:4996) //Turn off warnings about deprecated C routines
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// #pragma warning(disable:4786) // Disable the "debug name too long" warning
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#define SIMD_FORCE_INLINE __forceinline
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#define ATTRIBUTE_ALIGNED16(a) __declspec(align(16)) a
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#define ATTRIBUTE_ALIGNED64(a) __declspec(align(64)) a
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#define ATTRIBUTE_ALIGNED128(a) __declspec(align(128)) a
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#ifdef _XBOX
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#define BT_USE_VMX128
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#include <ppcintrinsics.h>
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#define BT_HAVE_NATIVE_FSEL
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#define btFsel(a, b, c) __fsel((a), (b), (c))
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#else
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#if (defined(_WIN32) && (_MSC_VER) && _MSC_VER >= 1400) && (!defined(BT_USE_DOUBLE_PRECISION))
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#define BT_USE_SSE
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#include <emmintrin.h>
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#endif
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#endif //_XBOX
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#endif //__MINGW32__
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#include <assert.h>
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#ifdef BT_DEBUG
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#define btAssert assert
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#else
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#define btAssert(x)
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#endif
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//btFullAssert is optional, slows down a lot
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#define btFullAssert(x)
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#define btLikely(_c) _c
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#define btUnlikely(_c) _c
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#else
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#if defined(__CELLOS_LV2__)
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#define SIMD_FORCE_INLINE inline __attribute__((always_inline))
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#define ATTRIBUTE_ALIGNED16(a) a __attribute__((aligned(16)))
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#define ATTRIBUTE_ALIGNED64(a) a __attribute__((aligned(64)))
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#define ATTRIBUTE_ALIGNED128(a) a __attribute__((aligned(128)))
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#ifndef assert
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#include <assert.h>
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#endif
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#ifdef BT_DEBUG
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#ifdef __SPU__
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#include <spu_printf.h>
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#define printf spu_printf
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#define btAssert(x) \
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{ \
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if (!(x)) { \
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printf("Assert " __FILE__ ":%u (" #x ")\n", __LINE__); \
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spu_hcmpeq(0, 0); \
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} \
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}
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#else
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#define btAssert assert
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#endif
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#else
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#define btAssert(x)
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#endif
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//btFullAssert is optional, slows down a lot
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#define btFullAssert(x)
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#define btLikely(_c) _c
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#define btUnlikely(_c) _c
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#else
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#ifdef USE_LIBSPE2
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#define SIMD_FORCE_INLINE __inline
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#define ATTRIBUTE_ALIGNED16(a) a __attribute__((aligned(16)))
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#define ATTRIBUTE_ALIGNED64(a) a __attribute__((aligned(64)))
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#define ATTRIBUTE_ALIGNED128(a) a __attribute__((aligned(128)))
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#ifndef assert
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#include <assert.h>
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#endif
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#ifdef BT_DEBUG
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#define btAssert assert
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#else
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#define btAssert(x)
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#endif
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//btFullAssert is optional, slows down a lot
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#define btFullAssert(x)
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#define btLikely(_c) __builtin_expect((_c), 1)
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#define btUnlikely(_c) __builtin_expect((_c), 0)
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#else
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//non-windows systems
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#if (defined(__APPLE__) && defined(__i386__) && (!defined(BT_USE_DOUBLE_PRECISION)))
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#define BT_USE_SSE
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#include <emmintrin.h>
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#define SIMD_FORCE_INLINE inline
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///@todo: check out alignment methods for other platforms/compilers
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#define ATTRIBUTE_ALIGNED16(a) a __attribute__((aligned(16)))
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#define ATTRIBUTE_ALIGNED64(a) a __attribute__((aligned(64)))
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#define ATTRIBUTE_ALIGNED128(a) a __attribute__((aligned(128)))
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#ifndef assert
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#include <assert.h>
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#endif
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#if defined(DEBUG) || defined(_DEBUG)
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#define btAssert assert
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#else
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#define btAssert(x)
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#endif
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//btFullAssert is optional, slows down a lot
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#define btFullAssert(x)
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#define btLikely(_c) _c
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#define btUnlikely(_c) _c
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#else
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#define SIMD_FORCE_INLINE inline
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///@todo: check out alignment methods for other platforms/compilers
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///#define ATTRIBUTE_ALIGNED16(a) a __attribute__ ((aligned (16)))
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///#define ATTRIBUTE_ALIGNED64(a) a __attribute__ ((aligned (64)))
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///#define ATTRIBUTE_ALIGNED128(a) a __attribute__ ((aligned (128)))
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#define ATTRIBUTE_ALIGNED16(a) a
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#define ATTRIBUTE_ALIGNED64(a) a
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#define ATTRIBUTE_ALIGNED128(a) a
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#ifndef assert
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#include <assert.h>
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#endif
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#if defined(DEBUG) || defined(_DEBUG)
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#define btAssert assert
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#else
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#define btAssert(x)
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#endif
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//btFullAssert is optional, slows down a lot
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#define btFullAssert(x)
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#define btLikely(_c) _c
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#define btUnlikely(_c) _c
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#endif //__APPLE__
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#endif // LIBSPE2
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#endif //__CELLOS_LV2__
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#endif
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// -- GODOT start --
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namespace VHACD {
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// -- GODOT end --
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///The btScalar type abstracts floating point numbers, to easily switch between double and single floating point precision.
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#if defined(BT_USE_DOUBLE_PRECISION)
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typedef double btScalar;
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//this number could be bigger in double precision
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#define BT_LARGE_FLOAT 1e30
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#else
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typedef float btScalar;
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//keep BT_LARGE_FLOAT*BT_LARGE_FLOAT < FLT_MAX
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#define BT_LARGE_FLOAT 1e18f
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#endif
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#define BT_DECLARE_ALIGNED_ALLOCATOR() \
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SIMD_FORCE_INLINE void* operator new(size_t sizeInBytes) { return btAlignedAlloc(sizeInBytes, 16); } \
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SIMD_FORCE_INLINE void operator delete(void* ptr) { btAlignedFree(ptr); } \
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SIMD_FORCE_INLINE void* operator new(size_t, void* ptr) { return ptr; } \
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SIMD_FORCE_INLINE void operator delete(void*, void*) {} \
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SIMD_FORCE_INLINE void* operator new[](size_t sizeInBytes) { return btAlignedAlloc(sizeInBytes, 16); } \
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SIMD_FORCE_INLINE void operator delete[](void* ptr) { btAlignedFree(ptr); } \
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SIMD_FORCE_INLINE void* operator new[](size_t, void* ptr) { return ptr; } \
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SIMD_FORCE_INLINE void operator delete[](void*, void*) {}
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#if defined(BT_USE_DOUBLE_PRECISION) || defined(BT_FORCE_DOUBLE_FUNCTIONS)
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SIMD_FORCE_INLINE btScalar btSqrt(btScalar x)
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{
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return sqrt(x);
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}
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SIMD_FORCE_INLINE btScalar btFabs(btScalar x) { return fabs(x); }
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SIMD_FORCE_INLINE btScalar btCos(btScalar x) { return cos(x); }
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SIMD_FORCE_INLINE btScalar btSin(btScalar x) { return sin(x); }
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SIMD_FORCE_INLINE btScalar btTan(btScalar x) { return tan(x); }
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SIMD_FORCE_INLINE btScalar btAcos(btScalar x)
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{
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if (x < btScalar(-1))
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x = btScalar(-1);
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if (x > btScalar(1))
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x = btScalar(1);
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return acos(x);
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}
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SIMD_FORCE_INLINE btScalar btAsin(btScalar x)
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{
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if (x < btScalar(-1))
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x = btScalar(-1);
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if (x > btScalar(1))
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x = btScalar(1);
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return asin(x);
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}
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SIMD_FORCE_INLINE btScalar btAtan(btScalar x) { return atan(x); }
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SIMD_FORCE_INLINE btScalar btAtan2(btScalar x, btScalar y) { return atan2(x, y); }
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SIMD_FORCE_INLINE btScalar btExp(btScalar x) { return exp(x); }
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SIMD_FORCE_INLINE btScalar btLog(btScalar x) { return log(x); }
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SIMD_FORCE_INLINE btScalar btPow(btScalar x, btScalar y) { return pow(x, y); }
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SIMD_FORCE_INLINE btScalar btFmod(btScalar x, btScalar y) { return fmod(x, y); }
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#else
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SIMD_FORCE_INLINE btScalar btSqrt(btScalar y)
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{
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#ifdef USE_APPROXIMATION
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double x, z, tempf;
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unsigned long* tfptr = ((unsigned long*)&tempf) + 1;
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tempf = y;
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*tfptr = (0xbfcdd90a - *tfptr) >> 1; /* estimate of 1/sqrt(y) */
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x = tempf;
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z = y * btScalar(0.5);
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x = (btScalar(1.5) * x) - (x * x) * (x * z); /* iteration formula */
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x = (btScalar(1.5) * x) - (x * x) * (x * z);
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x = (btScalar(1.5) * x) - (x * x) * (x * z);
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x = (btScalar(1.5) * x) - (x * x) * (x * z);
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x = (btScalar(1.5) * x) - (x * x) * (x * z);
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return x * y;
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#else
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return sqrtf(y);
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#endif
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}
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SIMD_FORCE_INLINE btScalar btFabs(btScalar x) { return fabsf(x); }
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SIMD_FORCE_INLINE btScalar btCos(btScalar x) { return cosf(x); }
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SIMD_FORCE_INLINE btScalar btSin(btScalar x) { return sinf(x); }
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SIMD_FORCE_INLINE btScalar btTan(btScalar x) { return tanf(x); }
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SIMD_FORCE_INLINE btScalar btAcos(btScalar x)
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{
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if (x < btScalar(-1))
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x = btScalar(-1);
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if (x > btScalar(1))
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x = btScalar(1);
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return acosf(x);
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}
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SIMD_FORCE_INLINE btScalar btAsin(btScalar x)
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{
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if (x < btScalar(-1))
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x = btScalar(-1);
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if (x > btScalar(1))
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x = btScalar(1);
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return asinf(x);
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}
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SIMD_FORCE_INLINE btScalar btAtan(btScalar x) { return atanf(x); }
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SIMD_FORCE_INLINE btScalar btAtan2(btScalar x, btScalar y) { return atan2f(x, y); }
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SIMD_FORCE_INLINE btScalar btExp(btScalar x) { return expf(x); }
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SIMD_FORCE_INLINE btScalar btLog(btScalar x) { return logf(x); }
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SIMD_FORCE_INLINE btScalar btPow(btScalar x, btScalar y) { return powf(x, y); }
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SIMD_FORCE_INLINE btScalar btFmod(btScalar x, btScalar y) { return fmodf(x, y); }
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#endif
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#define SIMD_2_PI btScalar(6.283185307179586232)
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#define SIMD_PI (SIMD_2_PI * btScalar(0.5))
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#define SIMD_HALF_PI (SIMD_2_PI * btScalar(0.25))
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#define SIMD_RADS_PER_DEG (SIMD_2_PI / btScalar(360.0))
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#define SIMD_DEGS_PER_RAD (btScalar(360.0) / SIMD_2_PI)
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#define SIMDSQRT12 btScalar(0.7071067811865475244008443621048490)
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#define btRecipSqrt(x) ((btScalar)(btScalar(1.0) / btSqrt(btScalar(x)))) /* reciprocal square root */
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#ifdef BT_USE_DOUBLE_PRECISION
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#define SIMD_EPSILON DBL_EPSILON
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#define SIMD_INFINITY DBL_MAX
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#else
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#define SIMD_EPSILON FLT_EPSILON
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#define SIMD_INFINITY FLT_MAX
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#endif
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SIMD_FORCE_INLINE btScalar btAtan2Fast(btScalar y, btScalar x)
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{
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btScalar coeff_1 = SIMD_PI / 4.0f;
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btScalar coeff_2 = 3.0f * coeff_1;
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btScalar abs_y = btFabs(y);
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btScalar angle;
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if (x >= 0.0f) {
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btScalar r = (x - abs_y) / (x + abs_y);
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angle = coeff_1 - coeff_1 * r;
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}
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else {
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btScalar r = (x + abs_y) / (abs_y - x);
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angle = coeff_2 - coeff_1 * r;
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}
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return (y < 0.0f) ? -angle : angle;
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}
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SIMD_FORCE_INLINE bool btFuzzyZero(btScalar x) { return btFabs(x) < SIMD_EPSILON; }
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SIMD_FORCE_INLINE bool btEqual(btScalar a, btScalar eps)
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{
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return (((a) <= eps) && !((a) < -eps));
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}
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SIMD_FORCE_INLINE bool btGreaterEqual(btScalar a, btScalar eps)
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{
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return (!((a) <= eps));
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}
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SIMD_FORCE_INLINE int32_t btIsNegative(btScalar x)
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{
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return x < btScalar(0.0) ? 1 : 0;
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}
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SIMD_FORCE_INLINE btScalar btRadians(btScalar x) { return x * SIMD_RADS_PER_DEG; }
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SIMD_FORCE_INLINE btScalar btDegrees(btScalar x) { return x * SIMD_DEGS_PER_RAD; }
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#define BT_DECLARE_HANDLE(name) \
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typedef struct name##__ { \
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int32_t unused; \
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} * name
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#ifndef btFsel
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SIMD_FORCE_INLINE btScalar btFsel(btScalar a, btScalar b, btScalar c)
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{
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return a >= 0 ? b : c;
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}
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#endif
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#define btFsels(a, b, c) (btScalar) btFsel(a, b, c)
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SIMD_FORCE_INLINE bool btMachineIsLittleEndian()
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{
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long int i = 1;
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const char* p = (const char*)&i;
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if (p[0] == 1) // Lowest address contains the least significant byte
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return true;
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else
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return false;
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}
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///btSelect avoids branches, which makes performance much better for consoles like Playstation 3 and XBox 360
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///Thanks Phil Knight. See also http://www.cellperformance.com/articles/2006/04/more_techniques_for_eliminatin_1.html
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SIMD_FORCE_INLINE unsigned btSelect(unsigned condition, unsigned valueIfConditionNonZero, unsigned valueIfConditionZero)
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{
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// Set testNz to 0xFFFFFFFF if condition is nonzero, 0x00000000 if condition is zero
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// Rely on positive value or'ed with its negative having sign bit on
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// and zero value or'ed with its negative (which is still zero) having sign bit off
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// Use arithmetic shift right, shifting the sign bit through all 32 bits
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unsigned testNz = (unsigned)(((int32_t)condition | -(int32_t)condition) >> 31);
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unsigned testEqz = ~testNz;
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return ((valueIfConditionNonZero & testNz) | (valueIfConditionZero & testEqz));
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}
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SIMD_FORCE_INLINE int32_t btSelect(unsigned condition, int32_t valueIfConditionNonZero, int32_t valueIfConditionZero)
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{
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unsigned testNz = (unsigned)(((int32_t)condition | -(int32_t)condition) >> 31);
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unsigned testEqz = ~testNz;
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return static_cast<int32_t>((valueIfConditionNonZero & testNz) | (valueIfConditionZero & testEqz));
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}
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SIMD_FORCE_INLINE float btSelect(unsigned condition, float valueIfConditionNonZero, float valueIfConditionZero)
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{
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#ifdef BT_HAVE_NATIVE_FSEL
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return (float)btFsel((btScalar)condition - btScalar(1.0f), valueIfConditionNonZero, valueIfConditionZero);
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#else
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return (condition != 0) ? valueIfConditionNonZero : valueIfConditionZero;
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#endif
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}
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template <typename T>
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SIMD_FORCE_INLINE void btSwap(T& a, T& b)
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{
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T tmp = a;
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a = b;
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b = tmp;
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}
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//PCK: endian swapping functions
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SIMD_FORCE_INLINE unsigned btSwapEndian(unsigned val)
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{
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return (((val & 0xff000000) >> 24) | ((val & 0x00ff0000) >> 8) | ((val & 0x0000ff00) << 8) | ((val & 0x000000ff) << 24));
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}
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SIMD_FORCE_INLINE unsigned short btSwapEndian(unsigned short val)
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{
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return static_cast<unsigned short>(((val & 0xff00) >> 8) | ((val & 0x00ff) << 8));
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}
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SIMD_FORCE_INLINE unsigned btSwapEndian(int32_t val)
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{
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return btSwapEndian((unsigned)val);
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}
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SIMD_FORCE_INLINE unsigned short btSwapEndian(short val)
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{
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return btSwapEndian((unsigned short)val);
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}
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///btSwapFloat uses using char pointers to swap the endianness
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////btSwapFloat/btSwapDouble will NOT return a float, because the machine might 'correct' invalid floating point values
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///Not all values of sign/exponent/mantissa are valid floating point numbers according to IEEE 754.
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///When a floating point unit is faced with an invalid value, it may actually change the value, or worse, throw an exception.
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///In most systems, running user mode code, you wouldn't get an exception, but instead the hardware/os/runtime will 'fix' the number for you.
|
|
///so instead of returning a float/double, we return integer/long long integer
|
|
SIMD_FORCE_INLINE uint32_t btSwapEndianFloat(float d)
|
|
{
|
|
uint32_t a = 0;
|
|
unsigned char* dst = (unsigned char*)&a;
|
|
unsigned char* src = (unsigned char*)&d;
|
|
|
|
dst[0] = src[3];
|
|
dst[1] = src[2];
|
|
dst[2] = src[1];
|
|
dst[3] = src[0];
|
|
return a;
|
|
}
|
|
|
|
// unswap using char pointers
|
|
SIMD_FORCE_INLINE float btUnswapEndianFloat(uint32_t a)
|
|
{
|
|
float d = 0.0f;
|
|
unsigned char* src = (unsigned char*)&a;
|
|
unsigned char* dst = (unsigned char*)&d;
|
|
|
|
dst[0] = src[3];
|
|
dst[1] = src[2];
|
|
dst[2] = src[1];
|
|
dst[3] = src[0];
|
|
|
|
return d;
|
|
}
|
|
|
|
// swap using char pointers
|
|
SIMD_FORCE_INLINE void btSwapEndianDouble(double d, unsigned char* dst)
|
|
{
|
|
unsigned char* src = (unsigned char*)&d;
|
|
|
|
dst[0] = src[7];
|
|
dst[1] = src[6];
|
|
dst[2] = src[5];
|
|
dst[3] = src[4];
|
|
dst[4] = src[3];
|
|
dst[5] = src[2];
|
|
dst[6] = src[1];
|
|
dst[7] = src[0];
|
|
}
|
|
|
|
// unswap using char pointers
|
|
SIMD_FORCE_INLINE double btUnswapEndianDouble(const unsigned char* src)
|
|
{
|
|
double d = 0.0;
|
|
unsigned char* dst = (unsigned char*)&d;
|
|
|
|
dst[0] = src[7];
|
|
dst[1] = src[6];
|
|
dst[2] = src[5];
|
|
dst[3] = src[4];
|
|
dst[4] = src[3];
|
|
dst[5] = src[2];
|
|
dst[6] = src[1];
|
|
dst[7] = src[0];
|
|
|
|
return d;
|
|
}
|
|
|
|
// returns normalized value in range [-SIMD_PI, SIMD_PI]
|
|
SIMD_FORCE_INLINE btScalar btNormalizeAngle(btScalar angleInRadians)
|
|
{
|
|
angleInRadians = btFmod(angleInRadians, SIMD_2_PI);
|
|
if (angleInRadians < -SIMD_PI) {
|
|
return angleInRadians + SIMD_2_PI;
|
|
}
|
|
else if (angleInRadians > SIMD_PI) {
|
|
return angleInRadians - SIMD_2_PI;
|
|
}
|
|
else {
|
|
return angleInRadians;
|
|
}
|
|
}
|
|
|
|
///rudimentary class to provide type info
|
|
struct btTypedObject {
|
|
btTypedObject(int32_t objectType)
|
|
: m_objectType(objectType)
|
|
{
|
|
}
|
|
int32_t m_objectType;
|
|
inline int32_t getObjectType() const
|
|
{
|
|
return m_objectType;
|
|
}
|
|
};
|
|
|
|
// -- GODOT start --
|
|
// Cherry-picked from Bullet 2.88 to fix GH-27926
|
|
///align a pointer to the provided alignment, upwards
|
|
template <typename T>
|
|
T *btAlignPointer(T *unalignedPtr, size_t alignment)
|
|
{
|
|
struct btConvertPointerSizeT
|
|
{
|
|
union {
|
|
T *ptr;
|
|
size_t integer;
|
|
};
|
|
};
|
|
btConvertPointerSizeT converter;
|
|
|
|
const size_t bit_mask = ~(alignment - 1);
|
|
converter.ptr = unalignedPtr;
|
|
converter.integer += alignment - 1;
|
|
converter.integer &= bit_mask;
|
|
return converter.ptr;
|
|
}
|
|
// -- GODOT end --
|
|
|
|
// -- GODOT start --
|
|
}; // namespace VHACD
|
|
// -- GODOT end --
|
|
|
|
#endif //BT_SCALAR_H
|