Graphics instruction set

[Walt Decker]

I am not very familiar with the LB graphics instruction set.  Will this:

when leftmouseButtonDown; when mouseMove ROTATE

work to send both conditions to SUB ROTATE?

Or should it be

when leftmouseButtonDown ROTATE

when mouseMove ROTATE

Also, can one use "while" with the mouse instructions?

Never mind.  I will work it out myself.

[Brandon Parker]

Walt,
Either of those should work perfectly fine; although, people typically want to know which event caused the subroutine to activate, so you might want to keep a running track of MouseX & MouseY (LB variables) vs oldMouseX & oldMouseY (user variables) to figure out whether it was the "Left Button Down" or "Mouse Move" event that fired. This is one reason for using two separate subroutines...


{:0)

Brandon Parker

[tsh73]

Hello Walt
Names for these events in LB
leftButtonDown
leftButtonMove

Issuing "when leftButtonDown" actually removes handler from mouse click
so
#gr "when leftButtonDown; when leftButtonMove  ROTATE"
does
* remove handler from mouse click
* assign handler to mouse move

If you want both events to be assigned to ROTATE, you can use two lines
#gr "when leftButtonDown ROTATE"
#gr "when leftButtonMove  ROTATE"
or single line
#gr "when leftButtonDown ROTATE; when leftButtonMove  ROTATE"

As to

Also, can one use "while" with the mouse instructions?

plese explain what you mean.

[Walt Decker]

Thanks Mr. Parker, Anatoly. I figured it out a couple of days ago.