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Dear Rglers, With rgl, I would like to set marker when a button is pressed, but leave the standard trackball handling otherwise. Thanks to Duncan and Oleg for helping me handling key down. How do I say in a custom mouse handler "after having done your work, forward to standard trackball once only"...

Dear Rglers, when using a callback in rgl (Windows, if it matters) http://finzi.psych.upenn.edu/R/library/rgl/html/callbacks.html I would like to get the Asynchronous keyboard status (as least Shift/Control, but preferably other key) to set markers in a plot. getGraphicsEvents seems to be limited to norma...