math + constants

all.h

@@ -648,9 +648,30 @@ global const u8  MAX_u8  = 0xff;
 #ifndef MICROSECONDS_PER_SECOND
 #  define MICROSECONDS_PER_SECOND ONE_MILLION
 #endif
+#ifndef SECONDS_PER_MICROSECOND
+#  define SECONDS_PER_MICROSECOND (1.0/MICROSECONDS_PER_SECOND)
+#endif
 #ifndef NANOSECONDS_PER_MICROSECOND
 #  define NANOSECONDS_PER_MICROSECOND ONE_THOUSAND
 #endif
+#ifndef DAYS_PER_HOUR
+#  define DAYS_PER_HOUR (1.0/24.0)
+#endif
+#ifndef HOURS_PER_DAY
+#  define HOURS_PER_DAY (24.0)
+#endif
+#ifndef HOURS_PER_MINUTE
+#  define HOURS_PER_MINUTE (1.0/60.0)
+#endif
+#ifndef MINUTES_PER_HOUR
+#  define MINUTES_PER_HOUR (60.0)
+#endif
+#ifndef MINUTES_PER_SECOND
+#  define MINUTES_PER_SECOND (1.0/60.0)
+#endif
+#ifndef SECONDS_PER_MINUTE
+#  define SECONDS_PER_MINUTE (60.0)
+#endif
 
 
 ///// CUSTOM ENTRY POINT
@@ -671,6 +692,7 @@ fn void u32ReverseArray(u32 arr[], u32 size);
 fn bool vec2Eq(Vec2 a, Vec2 b);
 fn Vec2f32 vec2Add(Vec2 a, Vec2 b);
 fn Vec2f32 vec2Subtract(Vec2 a, Vec2 b);
+fn f32 vec2Distance(Vec2 a, Vec2 b);
 fn Vec2f32 vec2FromHexCube(Vec2 map_center, XYZ cube, f32 size, f32 border_thickness);
 fn i32 i32Middle(i32 x, i32 y);
 fn u32 u32Middle(u32 x, u32 y);

math.c

@@ -1,4 +1,5 @@
 #include "all.h"
+#include <math.h>
 
 fn bool xyzEq(XYZ a, XYZ b) {
   return a.x == b.x &&
@@ -90,6 +91,10 @@ fn Vec2f32 vec2Subtract(Vec2 a, Vec2 b) {
   return result;
 }
 
+fn f32 vec2Distance(Vec2 a, Vec2 b) {
+  return sqrtf((a.x - b.x) * (a.x - b.x) + (a.y - b.y) * (a.y - b.y));
+}
+
 fn Vec2f32 vec2FromHexCube(Vec2 map_center, XYZ cube, f32 size, f32 border_thickness) {
   f32 hex_height = SQRT_3 * size;
   f32 hex_width = 2.0 * size;