"float map(float val, float A, float B, float a, float b)										\n"
	"{																								\n"
	"	return (val - A) * (b - a) / (B - A) + a;													\n"
	"}																								\n"
	"																								\n"
	"void main()																					\n"
	"{																								\n"
	"	vec4 ndc = VP * M * vec4(position, 1);														\n"
	"																								\n"
 	"	gl_Position = ndc;																			\n"
	"	float u = map(ndc.x / ndc.w, -1, 1, 0, 1);													\n"
	"	float v = map(ndc.y / ndc.w, -1, 1, 0, 1);													\n"
	"	f_texCoords = vec2(u, v);																	\n"
	"}