F:/My Projects/LSEngine/Modules/LSMathLib/Src/LSMConstants.h

#ifndef __LSM_CONSTANTS_H__
#define __LSM_CONSTANTS_H__


// LSM_PI.
#define LSM_PI_DOUBLE           (3.14159265358979323846)
#define LSM_PI                          (static_cast<LSREAL>(LSM_PI_DOUBLE))
#define LSM_HALFPI                      (static_cast<LSREAL>(LSM_PI_DOUBLE * 0.5))
#define LSM_DOUBLEPI            (static_cast<LSREAL>(LSM_PI_DOUBLE * 2.0))
#define LSM_ONEFOURTHPI         (static_cast<LSREAL>(LSM_PI_DOUBLE * 0.25))
#define LSM_E                           (static_cast<LSREAL>(2.71828182845904523536))
#define LSM_SQRT_TWO            (static_cast<LSREAL>(1.41421356237309504880))
#define LSM_SQRT_THREE          (static_cast<LSREAL>(1.73205080756887729352))
#define LSM_SQRT_1OVER2         (static_cast<LSREAL>(0.70710678118654752440))
#define LSM_SQRT_1OVER3         (static_cast<LSREAL>(0.57735026918962576450))
#define LSM_M_DEG2RAD           (static_cast<LSREAL>(LSM_PI_DOUBLE / 180.0))
#define LSM_M_RAD2DEG           (static_cast<LSREAL>(180.0 / LSM_PI_DOUBLE))
#define LSM_M_SEC2MS            (static_cast<LSREAL>(1000.0))
#define LSM_M_MS2SEC            (static_cast<LSREAL>(0.001))
#if LSM_BASETYPE == LSM_FIXED
#define LSM_INFINITY            (LSREAL::DigitMask())
#define LSM_REAL_EPSILON        LSREAL( LSREAL::CFixedRawType( 1 ) )
#else
#define LSM_INFINITY            (static_cast<LSREAL>(1e30))
#define LSM_REAL_EPSILON        (static_cast<LSREAL>(1.192092896e-07))
#endif  // LSM_BASETYPE == LSM_FIXED
#define LSM_FLT_EPSILON         1.192092896e-07f
#define LSM_DBL_EPSILON         2.2204460492503131e-016

#define LSM_MAT_EPSILON         LSM_REAL_EPSILON
#define LSM_TWO                         (static_cast<LSREAL>(2.0))
#define LSM_ONE                         (static_cast<LSREAL>(1.0))
#define LSM_HALF                        (static_cast<LSREAL>(0.5))
#define LSM_FOURTH                      (static_cast<LSREAL>(0.25))
#define LSM_ZERO                        (static_cast<LSREAL>(0.0))
#define LSM_PLANE_THICKNESS     (static_cast<LSREAL>(0.00005))


#define LSM_FLT_LOOKUP_BITS     8
#define LSM_FLT_EXP_POS         23
#define LSM_FLT_EXP_BIAS        127

#define LSM_DBL_LOOKUP_BITS     11
#define LSM_DBL_EXP_POS         52
#define LSM_DBL_EXP_BIAS        1023

#define LSM_FLT_MAX                     3.402823466e+38F
#define LSM_DBL_MAX                     1.7976931348623158e+308

#if LSM_BASETYPE == LSM_FLOAT
#define LSM_LOOKUP_BITS         LSM_FLT_LOOKUP_BITS
#define LSM_EXP_POS                     LSM_FLT_EXP_POS
#define LSM_EXP_BIAS            LSM_FLT_EXP_BIAS
#elif LSM_BASETYPE == LSM_DOUBLE
#define LSM_LOOKUP_BITS         LSM_DBL_LOOKUP_BITS
#define LSM_EXP_POS                     LSM_DBL_EXP_POS
#define LSM_EXP_BIAS            LSM_DBL_EXP_BIAS
#endif  // LSM_BASETYPE

#define LSM_LOOKUP_POS          (LSM_EXP_POS - LSM_LOOKUP_BITS)
#define LSM_SEED_POS            (LSM_EXP_POS - 8)
#define LSM_SQRT_TABLE_SIZE     (2 << LSM_LOOKUP_BITS)
#define LSM_LOOKUP_MASK         (LSM_SQRT_TABLE_SIZE - 1)

#endif  // __LSM_CONSTANTS_H__