First commit

hex_math.h

@@ -0,0 +1,60 @@
+#include <math.h>
+#include <stdint.h>
+/* Types */
+typedef float _v2f __attribute__((matrix_type(1,2)));
+typedef float _v3f __attribute__((matrix_type(1,3)));
+typedef float _v4f __attribute__((matrix_type(1,4)));
+
+typedef struct {
+    union {
+        struct {
+            float first;
+            _v3f tail;
+        };
+        struct {
+            _v2f first_half;
+            _v2f second_half;
+        };
+        struct {
+            _v3f v3f;
+            float last;
+        };
+        _v4f v4f;
+        struct {
+            float r;
+            float g;
+            float b;
+            float a;
+        };
+        struct {
+            float x;
+            float y;
+            float z;
+            float w;
+        };
+    };
+} vec4f;
+
+typedef struct {
+    vec4f position; // center pos
+    float radius;   // side length
+} hex_t;
+
+typedef struct {
+    hex_t *hexes;
+    uint32_t rows;
+    uint32_t columns;
+} hexgrid_t;
+
+_Static_assert(sizeof(vec4f) == sizeof(float) * 4, "Bad vector size");
+
+/* Functions */
+double sint(double turns)
+{
+    return sin(turns*2*M_PI);
+}
+
+double cost(double turns)
+{
+    return cos(turns*2*M_PI);
+}