#version 330 core

const uint lights = 2u;

uniform sampler2D texBase;
uniform samplerCubeShadow texShadowMaps[lights];

float VectorToDepth (vec3 Vec)
{
    vec3 AbsVec = abs(Vec);
    //float LocalZcomp = max(AbsVec.x, max(AbsVec.y, AbsVec.z));
    float LocalZcomp = length(AbsVec);

    // Replace f and n with the far and near plane values you used when
    //   you drew your cube map.
    const float f = 128.0;
    const float n = 1.0;

    //    float NormZComp = (f+n) / (f-n) - (2*f*n)/(f-n)/LocalZcomp;
    return (f/(f-n))+(f*n/(n-f))/LocalZcomp;
    //return (NormZComp + 1.0) * 0.5;
}

in vec2 fragTC;
//in vec3 fragNorm;
//in vec3 light0Vect;
in vec3 lightColors[lights];
in vec3 lightVecs[lights];

out vec4 color;

const float bias = 0.0;

void main(void) {
     vec4 texColor = texture(texBase, fragTC);

     vec4 col = vec4(0.0, 0.0, 0.0, 0.0);
     {
     	      float depth = VectorToDepth(lightVecs[0])-bias;
	      vec3 nlv = normalize(lightVecs[0]);
	      float depth_compare = texture(texShadowMaps[0], vec4(nlv, depth));
	      // color = vec4(depth_compare, 0.0, 0.0, 1.0);
	      col += texColor*vec4(lightColors[0], 1.0)*depth_compare;
     }
     {
     	      float depth = VectorToDepth(lightVecs[1])-bias;
	      vec3 nlv = normalize(lightVecs[1]);
	      float depth_compare = texture(texShadowMaps[1], vec4(nlv, depth));
	      // color = vec4(depth_compare, 0.0, 0.0, 1.0);
	      col += texColor*vec4(lightColors[1], 1.0)*depth_compare;
     }
     color = col+texColor*0.05;
     
}