I'm building a temperature grid in a 2d array, where i'd like to build some kind of smooth gradient based on the entire map.

For instance this map can start red in the top left, fade to a cool blue near the center, then flare into red again off to the right, while everything else becomes a green tinted blue.

As is i could use the drawing api to draw colored blocks to give the impression of such a map, but ideally i'd be able to smooth out the values with gradients, because the map is really quite low res.

Anyone got any ideas for this?

- Andreas
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