44 lines
1.0 KiB
C
44 lines
1.0 KiB
C
#ifndef VEC_UTIL_H_
|
|
#define VEC_UTIL_H_
|
|
#include <math.h>
|
|
#include <raylib.h>
|
|
static const Vector2 NULL_VEC2 = {0, 0};
|
|
|
|
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;
|
|
}
|
|
|
|
#endif // VEC_UTIL_H_
|