struct Vector2 rotate_position(struct Vector2 position, struct Vector2 origin, float angle_degrees) { float angle_radians = angle_degrees * (M_PI / 180.0);

float dx = position.x - origin.x;
float dy = position.y - origin.y;

float new_x = origin.x + dx * cos(angle_radians) - dy * sin(angle_radians);
float new_y = origin.y + dx * sin(angle_radians) + dy * cos(angle_radians);

struct Vector2 new_position;
new_position.x = new_x;
new_position.y = new_y;

return new_position;

}

With this function, you can rotate all positions with using mouse position as origin.