v4k-git-backup/engine/art/shaders/fs_shadow_vsm.glsl

in vec4 v_position;
out vec4 outColor;

void main() {
    #ifdef VSMCUBE
    float depth = length( vec3(v_position) ) / 20;
    #else
    float depth = v_position.z / v_position.w;
    depth = depth * 0.5 + 0.5;
    #endif
    
    float moment1 = depth;
    float moment2 = depth * depth;
    
    float dx = dFdx(depth);
    float dy = dFdy(depth);
    moment2 += 0.25*(dx*dx+dy*dy);
    outColor = vec4( moment1, moment2, 0.0, 0.0);
}