// Distinguish completely transparent pixels from significant pixel by
// "binarizing" the texture via a bit array.
// false if a pixel is not significant (= transparent), true otherwise
public static BinarizedImage BinarizeTexture( Texture2D a_rTextureToFilter, float a_fAlphaCutOff )
{
if(a_rTextureToFilter == null)
{
return null;
}
float fAlphaCutOff32 = a_fAlphaCutOff * 255;
// Retrieve texture pixels (in 32bits format)
// Array is flattened / pixels laid left to right, bottom to top
Color32[ ] oTexturePixels = a_rTextureToFilter.GetPixels32( );
int iPixelCount = oTexturePixels.Length;
// Create (padded) sprite shape pixels array (bit array)
BinarizedImage oBinarizedTexture = new BinarizedImage( a_rTextureToFilter.width, a_rTextureToFilter.height, false );
// Parse all pixels
for( int iPixelIndex = 0; iPixelIndex < iPixelCount; ++iPixelIndex )
{
Color32 f4Pixel = oTexturePixels[ iPixelIndex ];
oBinarizedTexture.SetUnpaddedPixel( iPixelIndex, ( f4Pixel.a >= fAlphaCutOff32 ) );
}
// Fill 1px holes
oBinarizedTexture.FillInsulatedHoles( );
return oBinarizedTexture;
}
