Add control / update logic

maths.h

@@ -1,24 +1,35 @@
 #ifndef MATHS_H
 #define MATHS_H
 
+#define PI 3.14159265358979323846264
+
 typedef struct {
-	float x;
-	float y;
+	float x, y;
 } vec2_t;
 
 typedef struct {
-	float x;
-	float y;
-	float z;
+	vec2_t x, y;
+} mat2_t;
+
+typedef struct {
+	float x, y, z;
 } vec3_t;
 
 typedef struct {
-	vec3_t x;
-	vec3_t y;
-	vec3_t z;
+	vec3_t x, y, z;
 } mat3_t;
 
+vec2_t vec2_add(vec2_t v1, vec2_t v2);
+vec2_t vec2_scale(vec2_t v, float s);
 vec3_t vec2_extend(vec2_t v);
+
+mat2_t mat2_rotation(float theta);
+vec2_t mat2_mul_vec2(mat2_t m, vec2_t v);
+mat2_t mat2_mul_mat2(mat2_t m1, mat2_t m2);
+mat3_t mat2_extend(mat2_t m);
+
+mat3_t mat3_translation(vec2_t v);
 vec3_t mat3_mul_vec3(mat3_t m, vec3_t v);
+mat3_t mat3_mul_mat3(mat3_t m1, mat3_t m2);
 
 #endif