Use signed integers for interpolation in marching squares algorithm#7814
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StephenCWills merged 1 commit intodiasurgical:masterfrom Mar 7, 2025
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glebm
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Mar 6, 2025
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Fixes aberrations in the light data around the saddle points in cases 5 and 10 of the marching squares algorithm. You can see it most clearly by casting Flame Wave, where the following visual effect will flicker onto the screen.
And in this image, you can see the
dLightdata that causes it. The light data goes a bit crazy around the saddle points (the space between tiles with with values 0 east/west and 5 north/south).