sfw/sfwl/core/math_defs.h

103 lines
2.0 KiB
C

//--STRIP
#ifndef MATH_DEFS_H
#define MATH_DEFS_H
//--STRIP
/*************************************************************************/
/* math_defs.h */
/* From https://github.com/Relintai/pandemonium_engine (MIT) */
/*************************************************************************/
#define CMP_EPSILON 0.00001
#define CMP_EPSILON2 (CMP_EPSILON * CMP_EPSILON)
#define CMP_NORMALIZE_TOLERANCE 0.000001
#define CMP_POINT_IN_PLANE_EPSILON 0.00001
#define Math_SQRT12 0.7071067811865475244008443621048490
#define Math_SQRT2 1.4142135623730950488016887242
#define Math_LN2 0.6931471805599453094172321215
#define Math_TAU 6.2831853071795864769252867666
#define Math_PI 3.1415926535897932384626433833
#define Math_E 2.7182818284590452353602874714
#define Math_INF INFINITY
#define Math_NAN NAN
#ifdef DEBUG_ENABLED
#define MATH_CHECKS
#endif
//this epsilon is for values related to a unit size (scalar or vector len)
#ifdef PRECISE_MATH_CHECKS
#define UNIT_EPSILON 0.00001
#else
//tolerate some more floating point error normally
#define UNIT_EPSILON 0.001
#endif
#define USEC_TO_SEC(m_usec) ((m_usec) / 1000000.0)
#define SEC_TO_USEC(m_usec) ((m_usec) * 1000000.0)
enum ClockDirection {
CLOCKWISE,
COUNTERCLOCKWISE
};
enum Orientation {
HORIZONTAL,
VERTICAL
};
enum HAlign {
HALIGN_LEFT,
HALIGN_CENTER,
HALIGN_RIGHT
};
enum VAlign {
VALIGN_TOP,
VALIGN_CENTER,
VALIGN_BOTTOM
};
enum Margin {
MARGIN_LEFT,
MARGIN_TOP,
MARGIN_RIGHT,
MARGIN_BOTTOM
};
enum Side {
SIDE_LEFT,
SIDE_TOP,
SIDE_RIGHT,
SIDE_BOTTOM
};
enum Corner {
CORNER_TOP_LEFT,
CORNER_TOP_RIGHT,
CORNER_BOTTOM_RIGHT,
CORNER_BOTTOM_LEFT
};
/**
* The "Real" type is an abstract type used for real numbers, such as 1.5,
* in contrast to integer numbers. Precision can be controlled with the
* presence or absence of the REAL_T_IS_DOUBLE define.
*/
#ifdef REAL_T_IS_DOUBLE
typedef double real_t;
#else
typedef float real_t;
#endif
//--STRIP
#endif // MATH_DEFS_H
//--STRIP