Comment 2 for bug 948938

This a test program by Henri Verbeet.
According to its author :
"It prints the mouse coordinates to the terminal,
you mostly care about "delta" for this bug. Press 'C' to enable / disable
clipping, press 'W' to warp the mouse. Note that this doesn't necessarily
behave the same as those games, but it should be enough for basic testing of
relative mouse events."