typedef struct Transformation Transformation;

struct Transformation {
	vec3 cam_pos, cam_look, cam_head, axis, scale, translate;
	float fov, aspect_ratio, near_plane, far_plane, angle;
	mat4 Projection, View, Model, MVP;
};

#define TransformationCalculateLocal(x) \
	glm_perspective(x.fov, x.aspect_ratio, x.near_plane, x.far_plane, x.Projection); \
	glm_lookat(x.cam_pos, x.cam_look, x.cam_head, x.View);			\
	glm_mat4_identity(x.Model); \
	glm_scale(x.Model, x.scale); \
	glm_rotate(x.Model, x.angle, x.axis); \
	glm_translate(x.Model, x.translate); \
	glm_mat4_mulN( (mat4 *[]) {&x.Projection, &x.View, &x.Model}, 3, x.MVP );

/* ... later on in main */

	Transformation t_cube = {
		.cam_pos = {4,3,3},
		.cam_look = {0,0,0},
		.cam_head = {0,1,0},
		.axis = {0,0,0},
		.scale = {0.5,0.5,0.5},
		.translate = {1,0,0},
		.fov = glm_rad(45),
		.aspect_ratio = (float)WIDTH / (float)HEIGHT,
		.near_plane = 0.1f,
		.far_plane = 100.0f,
		.angle = 50,
	};

	TransformationCalculateLocal(t_cube);

	mat4 Projection, View, Model, MVP;

	glm_perspective(glm_rad(45), (float)1024 / (float)768, 0.1f, 100.0f, Projection);
	glm_lookat( (vec3) {4,3,3}, (vec3) {0,0,0}, (vec3) {0,1,0}, View );
	glm_mat4_identity(Model);
	glm_scale(Model, (vec3) {0.5, 0.5, 0.5});
	glm_rotate(Model, glm_rad(50), (vec3) {0,0,0});
	glm_translate(Model, (vec3) {1,0,0});
	glm_mat4_mulN( (mat4 *[]) {&Projection, &View, &Model}, 3, MVP );