A bit hacky, but side-steps the call-by-call rounding error that causes needle origin drift. #2
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…eated re-computation. I let it be computed twice before using a cached value. If gauge is re-sized I destroy the cached value for two more calls. Why two? The first call is before the needle is scaled to its final size for the current view. -Ed Mauget
PEZ
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Jul 23, 2011
A bit hacky, but side-steps the call-by-call rounding error that causes needle origin drift.
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Wonderful, thanks for sharing the change back to me! |
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Origin of needle was drifting leftward due to rounding error from repeated re-computation. I let it be computed twice before using a cached value. If gauge is re-sized I destroy the cached value for two more calls. Why two? The first call is before the needle is scaled to its final size for the current view. -Lou Mauget