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Add a few utils. Start converting tabs to spaces.

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This commit is contained in:
castano 2010-03-17 07:54:07 +00:00
parent 78b55e1e37
commit e848645e88
1 changed files with 196 additions and 164 deletions
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90
src/nvmath/nvmath.h
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@ -7,6 +7,11 @@
#include <nvcore/Debug.h>
#include <math.h>
#include <limits.h> // INT_MAX
#if NV_OS_WIN32
#include <float.h>
#endif
// Function linkage
#if NVMATH_SHARED
@ -92,27 +97,23 @@ inline float asinf_assert(const float f)
#define asin asin_assert
#define asinf asinf_assert
#if NV_OS_WIN32
#include <float.h>
#endif
namespace nv
{
inline float toRadian(float degree) { return degree * (PI / 180.0f); }
inline float toDegree(float radian) { return radian * (180.0f / PI); }
inline float toRadian(float degree) { return degree * (PI / 180.0f); }
inline float toDegree(float radian) { return radian * (180.0f / PI); }
inline bool equal(const float f0, const float f1, const float epsilon = NV_EPSILON)
{
inline bool equal(const float f0, const float f1, const float epsilon = NV_EPSILON)
{
return fabs(f0-f1) <= epsilon;
}
}
inline bool isZero(const float f, const float epsilon = NV_EPSILON)
{
inline bool isZero(const float f, const float epsilon = NV_EPSILON)
{
return fabs(f) <= epsilon;
}
}
inline bool isFinite(const float f)
{
inline bool isFinite(const float f)
{
#if NV_OS_WIN32
return _finite(f) != 0;
#elif NV_OS_DARWIN || NV_OS_FREEBSD
@ -122,12 +123,12 @@ inline bool isFinite(const float f)
#else
# error "isFinite not supported"
#endif
//return std::isfinite (f);
//return finite (f);
}
//return std::isfinite (f);
//return finite (f);
}
inline bool isNan(const float f)
{
inline bool isNan(const float f)
{
#if NV_OS_WIN32
return _isnan(f) != 0;
#elif NV_OS_DARWIN || NV_OS_FREEBSD
@ -137,27 +138,58 @@ inline bool isNan(const float f)
#else
# error "isNan not supported"
#endif
}
}
inline uint log2(uint i)
{
inline uint log2(uint i)
{
uint value = 0;
while( i >>= 1 ) {
value++;
}
return value;
}
}
inline float lerp(float f0, float f1, float t)
{
inline float log2f(float x)
{
nvCheck(x >= 0);
return logf(x) / logf(2.0f);
}
inline float lerp(float f0, float f1, float t)
{
const float s = 1.0f - t;
return f0 * s + f1 * t;
}
}
inline float square(float f)
{
inline float square(float f)
{
return f * f;
}
}
// @@ Float to int conversions to be optimized at some point. See:
// http://cbloomrants.blogspot.com/2009/01/01-17-09-float-to-int.html
// http://www.stereopsis.com/sree/fpu2006.html
// http://assemblyrequired.crashworks.org/2009/01/12/why-you-should-never-cast-floats-to-ints/
// http://chrishecker.com/Miscellaneous_Technical_Articles#Floating_Point
inline int iround(float f)
{
return int(f);
}
inline int ifloor(float f)
{
return int(floorf(f));
}
inline int iceil(float f)
{
return int(ceilf(f));
}
inline float frac(float f)
{
return f - floor(f);
}
} // nv