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Peter Hutterer authored
We may get a pointer jump on tip down/up, see #128. For absolute coordinates we reset the history to avoid smoothing across that jump but deltas still used to be calculated based on the previous position to the current one. This can result in a large jump on tip down. Since the delta is supposed to be useful (and not physically accurate, see the docs), let's force it to 0/0 on tip down/up to avoid that scenario. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
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