// vert //

flat out uint object_flags;
out float distance;
out vec4 pos;

void main(void) {
	object_flags = qgl_ObjectFlags;
	if (bitfieldExtract(object_flags, 2, 1) == 0)
		return;
	qgl_MaterialIndex = qgl_Material;
	qgl_FragTexture = qgl_getFragTexture();
	pos = qgl_ftransform();
	gl_Position = pos;
}


// frag //

flat in uint object_flags;
in float distance;
in vec4 pos;

float z_near = 0.1f;
const float _pe = 2.4e-7;

void main(void) {
	if (bitfieldExtract(object_flags, 2, 1) == 0)
		discard;
	vec4 diffuse = qgl_materialTexture(QGL_MAP_DIFFUSE, qgl_FragTexture.xy, vec4(0));
	if(diffuse.a < 0.5)
		discard;

	float z = gl_FragCoord.z;
	z = z + z - 1;
	z = ((_pe - 2.) * z_near) / (z + z + _pe - 2.); // infinite depth
	
#ifdef OMNI
	gl_FragDepth = 1 - 1 / (length(pos.xyz) - z_near + 1);
#else
	gl_FragDepth = 1 - 1 / (pos.z - z_near + 1);
#endif
	//qgl_FragData[0].r = length(vec3(pos.xy, z));//1/gl_FragCoord.w;
}