outline

float3 Outiner(float2 TexCoord, float3 Final) {
    float halfScaleFloor = floor(OUTLINE_THICKNESS * 0.5f);
    float halfScaleCeil = ceil(OUTLINE_THICKNESS * 0.5f);

    float2 uvSamples[4];
    uvSamples[0] = TexCoord - float2(TEXEL.x, TEXEL.y) * halfScaleFloor;
    uvSamples[1] = TexCoord + float2(TEXEL.x, TEXEL.y) * halfScaleCeil;
    uvSamples[2] = TexCoord + float2(TEXEL.x * halfScaleCeil, -TEXEL.y * halfScaleFloor);
    uvSamples[3] = TexCoord + float2(-TEXEL.x * halfScaleFloor, TEXEL.y * halfScaleCeil);

    float Average = 0;
    Average += Decode_MaterialID( EXTRA_MAP.SampleLevel(SAMPLER_POINT_WRAP,uvSamples[0],0).y ).x;
    Average += Decode_MaterialID( EXTRA_MAP.SampleLevel(SAMPLER_POINT_WRAP,uvSamples[1],0).y ).x;
    Average += Decode_MaterialID( EXTRA_MAP.SampleLevel(SAMPLER_POINT_WRAP,uvSamples[2],0).y ).x;
    Average += Decode_MaterialID( EXTRA_MAP.SampleLevel(SAMPLER_POINT_WRAP,uvSamples[3],0).y ).x;
    Average /= 4.0f;

    Average = (Average == 1) ? 0.0f: 1.0f;

    float edge = Average > 0.0f ? 1.0f : 0.0f;

    Final = ((1 - edge) * Final) + (edge * lerp(Final, OUTLINE_COLOR.rgb,  OUTLINE_COLOR.a));
    return Final;
}