From: Carl Worth <cworth@cworth.org>
Date: Sun, 25 Jan 2009 16:40:47 +0000 (+1100)
Subject: Draw major ticks along the X and Y axes.
X-Git-Url: https://git.cworth.org/git?a=commitdiff_plain;h=256fd062ba200c24faab99c2e773744f33770c1c;hp=256fd062ba200c24faab99c2e773744f33770c1c;p=acre

Draw major ticks along the X and Y axes.

Many thanks to Keith Packard for suggesting the math to
normalize and choose a step spacing.
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