#version 460 core
in vec4 FragPos;

uniform vec3 lightPos;

uniform float far_plane;
void main()
{
    // get distance between fragment and light source
    float lightDistance = length(FragPos.xyz - lightPos);
    // map to [0;1] range by dividing by far_plane
    lightDistance = lightDistance / far_plane;
    gl_FragDepth = lightDistance;

    // write this as modified depth
}