#pragma MSP stage(vertex)
layout(location=0) in vec4 position;
out float gl_ClipDistance[1];
void main()
{
	gl_ClipDistance[0] = dot(position.xyz, vec3(0.0, 0.0, 1.0));
	gl_Position = position;
}

/* Expected output: vertex
out gl_PerVertex
{
	vec4 gl_Position;
	float gl_PointSize;
	float gl_ClipDistance[1];
};
layout(location=0) in vec4 position;
void main()
{
	gl_ClipDistance[0] = dot(position.xyz, vec3(0.0, 0.0, 1.0));
	gl_Position = position;
}
*/