#version 430
out vec4 FragColor;

in vec2 TexCoords;

layout (location = 0) uniform sampler2D depthMap;

// required when using a perspective projection matrix
float LinearizeDepth(float depth)
{
    float z = depth * 2.0 - 1.0; // Back to NDC 
    return (2.0 * 0.1 * 100.0) / (100.0 + 0.1 - z * (100.0 - 0.1));	
}

void main()
{             
    float depthValue = texture(depthMap, TexCoords).r;
    // FragColor = vec4(vec3(LinearizeDepth(depthValue) / 100.0), 1.0); // perspective
    FragColor = vec4(vec3(depthValue) * 10.0, 1.0); // orthographic
}