// 

shader 
standard_shader(
	point a_position = vector(0, 0, 0) [[ string attribute="POSITION"]],
	vector a_normal = vector(0, 1, 0) [[ string attribute="NORMAL"]],
	float a_uv[2] = {0,0} [[ string attribute="TEXCOORD_0"]],
	
	output point v_position = point(0, 0, 0) [[ string attribute="POSITION"]],
	output vector v_normal = vector(0,1,0) [[ string attribute="NORMAL"]],
	output float v_uv[2] = {0, 0} [[ string attribute="TEXCOORD_0"]],

	output vector v_toCamera = vector(0, 0, 0),
	output vector v_toLight = vector(0, 0, 0)
)
{
	matrix mat_world;
	getattribute("self:world_transform", mat_world);
	
	//matrix mat_normal;
	//getattribute("self:normal_transform", mat_normal);
	
	matrix mat_camera_view_proj;
	getattribute("camera:view_proj", mat_camera_view_proj);

	point camera_position;
	getattribute("camera:eye_pos", camera_position);
	
	point light0_position;
	getattribute("light0:position", light0_position);
	
	
	v_position = transform(mat_camera_view_proj, transform(mat_world, a_position));
	v_normal = a_normal;
	v_uv = a_uv;
	
	v_toCamera = normalize(camera_position-v_position);
	v_toLight = normalize(light0_position-v_position);
}