src/bz/math/math.h

   1 #ifndef BZ_MATH_MATH_H
   2 #define BZ_MATH_MATH_H
   3
   4 #include <bz/types/common.h>
   5
   6 #ifdef __cplusplus
   7 extern "C" {
   8 #endif
   9
  10 #define bzAbs(a) ((a) < 0.0f ? -(a) : (a))
  11
  12 #define bzMin(a, b) ((a) < (b) ? (a) : (b))
  13 #define bzMax(a, b) ((a) > (b) ? (a) : (b))
  14 #define bzMid(a, b, c) (bzMin(bzMin(bzMax((a), (b)), bzMax((b), (c))), bzMax((a), (c))))
  15
  16 #define bzMMin(a, b) (bzAbs(a) < bzAbs(b) ? (a) : (b))
  17 #define bzMMax(a, b) (bzAbs(a) > bzAbs(b) ? (a) : (b))
  18
  19 #define bzClamp(a, b, v) (bzMin(bzMax(v, bzMin((a), (b))), bzMax((a), (b))))
  20
  21 #define bzSgn(v)  (bzAbs(v) < 0.001f ? 0.0f : ((v) >= 0.0f ? 1.0f : -1.0f))
  22
  23 #define bzLerp(a, b, t) ((a) * (1 - (t)) + (b) * (t))
  24 #define bzUnlerp(a, b, v) (((v) - (a)) / ((b) - (a)))
  25
  26 #define bzFloor(v) ((float)((int)(v)))
  27 #define bzRound(v) (bzFloor(v + bzSgn(v) * 0.5f))
  28 #define bzCeil(v) (bzFloor(v) + (bzFloor(v) < (v)))
  29
  30 extern float bzSine(float a);
  31 extern float bzCosine(float a);
  32
  33 extern float bzInverseSine(float a);
  34 extern float bzInverseCosine(float a);
  35
  36 extern float bzSqrt(float a);
  37
  38 extern float bzAtan2(float x, float y); // To match PICO-8
  39 extern float bzAngleDelta(float from, float to);
  40
  41 extern float bzDistance(float x1, float y1, float x2, float y2);
  42 extern float bzDistanceSquared(float x1, float y1, float x2, float y2);
  43 extern bool bzDistanceCheck(float x1, float y1, float x2, float y2, float distance);
  44
  45 #ifdef __cplusplus
  46 }
  47 #endif
  48
  49 #endif