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vec3 Common_UnpackNormal(in vec3 norm){
    return (norm * vec3(2.0)) - vec3(1.0);
}

vec3 Common_UnpackNormalLA(in vec4 norm){
    vec3 newNorm = norm.agb;
    newNorm.b = sqrt(1.0 - (newNorm.x * newNorm.x) - (newNorm.y * newNorm.y));
    return (newNorm * vec3(2.0)) - vec3(1.0);
}

vec3 Common_PackNormal(in vec3 norm){
    return (norm * vec3(0.5)) + vec3(0.5);
}