Unused variables in postprocessing fragment

[giagitom]

It seems there are unused variables and uniforms inside getOutline funciton in postprocessing.frag. I tested outlines behavior with the commented out lines and everything seems to work fine (on opaque and transparent objects).

//uniform sampler2D tDepthTransparent;
...
...
...
/* float getDepthTransparent(const in vec2 coords) {
    #ifdef dTransparentOutline
        return unpackRGBAToDepth(texture2D(tDepthTransparent, coords));
    #else
        return 1.0;
    #endif
}*/

bool isBackground(const in float depth) {
    return depth == 1.0;
}

float getOutline(const in vec2 coords, const in float opaqueDepth, out float closestTexel) {
    float backgroundViewZ = 2.0 * uFar;
    vec2 invTexSize = 1.0 / uTexSize;

    //float transparentDepth = getDepthTransparent(coords);
    //float opaqueSelfViewZ = isBackground(opaqueDepth) ? backgroundViewZ : getViewZ(opaqueDepth);
    //float transparentSelfViewZ = isBackground(transparentDepth) ? backgroundViewZ : getViewZ(transparentDepth);
    //float selfDepth = min(opaqueDepth, transparentDepth);

    float outline = 1.0;
    closestTexel = 1.0;
    for (int y = -dOutlineScale; y <= dOutlineScale; y++) {
        for (int x = -dOutlineScale; x <= dOutlineScale; x++) {
            if (x * x + y * y > dOutlineScale * dOutlineScale) {
                continue;
            }

            vec2 sampleCoords = coords + vec2(float(x), float(y)) * invTexSize;

            vec4 sampleOutlineCombined = texture2D(tOutlines, sampleCoords);
            float sampleOutline = sampleOutlineCombined.r;
            float sampleOutlineDepth = unpackRGToUnitInterval(sampleOutlineCombined.gb);
            //float sampleOutlineViewZ = isBackground(sampleOutlineDepth) ? backgroundViewZ : getViewZ(sampleOutlineDepth);

            //float selfViewZ = sampleOutlineCombined.a == 0.0 ? opaqueSelfViewZ : transparentSelfViewZ;
            if (sampleOutline == 0.0 && sampleOutlineDepth < closestTexel) {
                outline = 0.0;
                closestTexel = sampleOutlineDepth;
            }
        }
    }
    return closestTexel < opaqueDepth ? outline : 1.0;
}