layout(triangles, equal_spacing, ccw) in;
uniform mat4 m, v, p;
uniform mat4 mvp;
in vec4 fct[];
out vec4 f_color;
out vec4 position;
out vec3 varyingNormalDirection;

vec4 n4_test(vec4 x){
        return vec4(normalize(x.xyz), 1);
}

void main(){
	vec4 p = 
			gl_TessCoord.x * gl_in[0].gl_Position +
			gl_TessCoord.y * gl_in[1].gl_Position +
			gl_TessCoord.z * gl_in[2].gl_Position;

	float d_inside = max(max(gl_TessCoord.x, gl_TessCoord.y), gl_TessCoord.z);
	p = n4_test(p);
	varyingNormalDirection = (m * p).xyz;
	gl_Position = mvp * p;
	position = m * p;
	f_color = 
			gl_TessCoord.x * fct[0] +
			gl_TessCoord.y * fct[1] +
			gl_TessCoord.z * fct[2];
}