Fix inconsistent frame rate of GlutWindow #794
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This was referenced Oct 14, 2016
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SimWindow and the derived classes (e.g.,
MyWindowof apps) callglutTimerFunc()when resuming the simulation or replay. However, this leads to calling the callee function passes intoglutTimerFunc()multiple times becauseglutTimerFunc()adds the callee function instead of resetting. I believe this is why the drawing rate was increased as reported by #729 and #792.This PR fixes it by calling
glutTimerFunc()once inGlutWindow::initWindow().This change is