Better processing of PNG heightmap import #6
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I had problems with processing of PNG16 exported from World Creator, because your method did not account for the alpha channel, which produced very nasty lines in the imported heightmap. I modified the PNG -> heightMap method to get values from pixels from Raster class.
The double array produced by the getPixel() method produces 3 equal numbers and alpha, so it is enough to take the value of the first channel for processing.