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Index › Programming Questions & Help › Programs › draw rectangular
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draw rectangular (Read 345 times)
jati
draw rectangular
Feb 10th, 2009, 3:22am  
I was wondering if using processing can let user drag the mouse to paint a rectangular, just as how to draw a rectangular in the painter program in windows.

As the mouse is dragging, an rectangular is rendered and updated instantly as the mouse moving for user's real-time preview. This should not influence other part in the canvas.

I tried to do that in the draw function. But all other part will be deleted as well. Can anyone shed some light it? Thanks.
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NoahBuddy
Re: draw rectangular
Reply #1 - Feb 10th, 2009, 7:29am  
There are probably a few ways to do this.

Was your plan to just change a picture (like in Paint) or to have objects that you could move later?
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PhiLho 
Re: draw rectangular
Reply #2 - Feb 10th, 2009, 10:41am  
A possible way is to get() the image at the start of the operation, then on each draw() call, image() it back to display and draw the rectangle.
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