#version 130

precision highp float;

in vec3 lightVector;

void main()
{
	// Plain shadow maps
	//gl_FragColor = vec4(length(lightVector) + 0.003);

	// Variance shadow maps
	float d = length(lightVector);
	float d2 = d * d;

	// No bias necessary, acne is taken care of by clamping
	// in the lighting shader.	
	//float dx = dFdx(d);
	//float dy = dFdy(d);
	//d2 += 0.25 * (dx * dx + dy * dy);
	
	gl_FragColor = vec4(d, d, d2, d2);

}