Direction:
ZOOM Button ------ you can zoom in/out the figure
RESET Button ------ put the cylinder in original position and
erase all test points
START MOVING Button ------ let the cylinder move
Speed Bar ------- increase or decrease the visual speed
streamline Checkbox ------ set the streamline background on or off
view pathine Checkbox ------ after clicking this Checkbox, you might
want to click on the figure to put test point(s), then
click START MOVING to view the results
view strealine Checkbox ------ similar as above, try and observe
the differrence