urho3d/SourceAssets/GLSLShaders/ScreenPos.vert

vec4 GetScreenPos(vec4 clipPos)
{
    return vec4(
        clipPos.x * cGBufferOffsets.z + cGBufferOffsets.x * clipPos.w,
        clipPos.y * cGBufferOffsets.w + cGBufferOffsets.y * clipPos.w,
        0.0,
        clipPos.w);
}

vec2 GetScreenPosPreDiv(vec4 clipPos)
{
    return vec2(
        clipPos.x / clipPos.w * cGBufferOffsets.z + cGBufferOffsets.x,
        clipPos.y / clipPos.w * cGBufferOffsets.w + cGBufferOffsets.y);
}

vec2 GetQuadTexCoord(vec4 clipPos)
{
    return vec2(
        clipPos.x / clipPos.w * 0.5 + 0.5,
        clipPos.y / clipPos.w * 0.5 + 0.5);
}

vec3 GetFarRay(vec4 clipPos)
{
    vec3 viewRay = vec3(
        clipPos.x / clipPos.w * cFrustumSize.x,
        clipPos.y / clipPos.w * cFrustumSize.y,
        cFrustumSize.z);

    return cCameraRot * viewRay;
}

vec3 GetNearRay(vec4 clipPos)
{
    vec3 viewRay = vec3(
        clipPos.x / clipPos.w * cFrustumSize.x,
        clipPos.y / clipPos.w * cFrustumSize.y,
        0.0);
    
    return (cCameraRot * viewRay) * cDepthMode.x;
}