pixelplanet/utils/ocean-tiles

ocean tiles

In order to have the ocean and land on the canvas, or any other background pic, we have to create tiles that we can later upload to the canvas with redisBackground.js. Those are the commands to create tiles in subfolders:

• create folder for tiles: mkdir ./ocean cd ocean

• to split image into tiles: convert ../ocean.png -crop 128x128 +adjoin ocean_tiles%02d.png

• upscale and convert to black and white mogrify -resize 2048x2048 -colors 2 -white-threshold 80% -black-threshold 80% ocean_tiles*.png or without dithering: mogrify +dither -resize 2048x2048 -colors 2 -white-threshold 80% -black-threshold 80% ocean_tiles*.png

• create subfolders for i in {0..31}; do mkdir $i; done

• put into subfolders for file in ./ocean_tiles*.png; do NUM=echo $file | sed -e 's/.*ocean_tiles//' -e 's/.png//'; Y=$(expr $NUM / 32); X=$(expr $NUM % 32); newfile="$X/$Y.png"; mv $file $newfile; done

• to remove the subfolders again for i in {0..31}; do rm -r $i; done