Update to non pointers and not working gravit

vec_utils.c

@@ -0,0 +1,45 @@
+#include "vec_utils.h"
+
+
+bool vec2_is_null(Vector2 v) {
+  if (v.x == 0 && v.y == 0) {
+    return true;
+  }
+  return false;
+}
+
+Vector2 transform_to_center(Vector2 v) {
+  int width = GetRenderWidth();
+  int height = GetRenderHeight();
+  Vector2 result = {v.x + width / 2.0, v.y + height / 2.0};
+  return result;
+}
+
+Vector2 vec2_sum(const Vector2 a, const Vector2 b) {
+  Vector2 result = {a.x + b.x, a.y + b.y};
+  return result;
+}
+Vector2 vec2_diff(const Vector2 a, const Vector2 b) {
+  Vector2 result = {a.x - b.x, a.y - b.y};
+  return result;
+}
+
+float vec2_len(Vector2 v) { return sqrtf(v.x * v.x + v.y * v.y); }
+
+Vector2 vec2_normalize(const Vector2 v) {
+  float len = vec2_len(v);
+  if (len == 0) {
+    return NULL_VEC2;
+  }
+  Vector2 result = {v.x / len, v.y / len};
+  return result;
+}
+
+Vector2 vec2_scale(const Vector2 normal, const float len) {
+  Vector2 result = {len * normal.x, len * normal.y};
+  return result;
+}
+
+float vec2_dot(const Vector2 a, const Vector2 b) {
+  return a.x * b.x + a.y * b.y;
+}