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for($ix=-2;$ix<=2;$ix++)
{
for($iy=-2;$iy<=2;$iy++)
{
print "vRefractColor += tex2D( RefractSampler, vRefractTexCoord + $ix * ddx1 + $iy * ddy1 );\n";
$sumweights+=1;
}
}
print "float sumweights = $sumweights;\n";
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