Initial commit

1 files changed, 60 insertions, 0 deletions

diff --git a/07-july/src/math/vector2f.c b/07-july/src/math/vector2f.c
new file mode 100644
index 0000000..5a3e29d
--- /dev/null
+++ b/07-july/src/math/vector2f.c
@@ -0,0 +1,60 @@
+#include "vector2f.h"
+#include <SDL2/SDL.h>
+
+vec2_t vec2_create(GLfloat x, GLfloat y)
+{
+    vec2_t a = {x, y};
+    return a;
+}
+
+vec2_t vec2_add(const vec2_t* a, const vec2_t* b)
+{
+    vec2_t c;
+    c.x = a->x + b->x;
+    c.y = a->y + b->y;
+    return c;
+}
+
+vec2_t vec2_sub(const vec2_t* a, const vec2_t* b)
+{
+    vec2_t c;
+    c.x = a->x - b->x;
+    c.y = a->y - b->y;
+    return c;
+}
+
+vec2_t vec2_scalar_mul(const vec2_t* a, GLfloat scalar)
+{
+    vec2_t c;
+    c.x = a->x * scalar;
+    c.y = a->y * scalar;
+    return c;
+}
+
+GLfloat vec2_dot_mul(const vec2_t* a, const vec2_t* b)
+{
+    return ( (a->x * b->x) + (a->y * b->y) );
+}
+
+
+vec2_t vec2_cross_mul(const vec2_t* a, const vec2_t* b)
+{
+    vec2_t c;
+    c.x = (a->x * b->y) - (a->y * b->x);
+    c.y = (a->y * b->x) - (a->x * b->y);
+    return c;
+}
+
+GLfloat vec2_length(vec2_t* a)
+{
+    return SDL_sqrtf(SDL_pow(a->x, 2.0f) + SDL_pow(a->y, 2.0f) );
+}
+
+vec2_t vec2_normalize(vec2_t* a)
+{
+    vec2_t b;
+    GLfloat length = vec2_length(a);
+    b.x = a->x / length;
+    b.y = a->y / length;
+    return b;
+}