1 files changed, 22 insertions, 0 deletions
diff --git a/src/engine/maths.h b/src/engine/maths.h
new file mode 100644
index 0000000..bef287e
--- /dev/null
+++ b/src/engine/maths.h
@@ -0,0 +1,22 @@
+#pragma once
+#include <stdint.h>
+// #include <math.h>
+
+typedef struct {
+	int32_t x,y;
+} vec2;
+
+typedef vec2 vec_cen;//centered
+typedef vec2 vec_cor;//left upper corner
+
+vec2 vec_add(vec2 a, vec2 b);
+
+vec_cor vec_cen2cor(vec_cen in, vec2 halfDistance);
+vec_cor vec_cor2cen(vec_cen in, vec2 halfDistance);
+
+//fixed point at decimal 7lsb (world positions in pixels (with fixed decimal point))
+#define HH_MATH_FIXED_POINT 7
+
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#define MAX(a,b) (((a)>(b))?(a):(b))
+#define CLAMP(N,LOWER,UPPER) (MIN(MAX(LOWER, N), UPPER))