// double px = tileSize*(superTileSize * sTileXY[0] + superTileSize/2) + zxy[1]; // [3] - plane point {disparity, x, y), x=0, y=0 is a 4,4 point of an 8x8 supertile
// double px = tileSize*(superTileSize * sTileXY[0] + superTileSize/2) + zxy[1]; // [3] - plane point {disparity, x, y), x=0, y=0 is a 4,4 point of an 8x8 supertile