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  #1  
Old 02-04-2011, 02:10 PM
jincheker jincheker is offline
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Join Date: Oct 2009
Posts: 15
Coordinates change

Hi, I try to make some program that could add on-the-fly objects by following the path of mouse movement.

I use code like this
Code:
PointBall = viz.add('ball.wrl')
PointBall.color(viz.RED)
PointBall.setPosition(e.x , e.y,2)
where variable "e" is obtained by left-button mouse event.

I also make PivotNavigate by mouse on, but disabled left-button function part.

The problem is: when I move the mouse on the screen, those generated objects do not follow the trajectory of the mouse cursor, there are some offset.

How can I neglect this, and if I zoom in or zoom out the screen, does this method still apply?

Thanks
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  #2  
Old 02-07-2011, 01:15 PM
Jeff Jeff is offline
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Join Date: Aug 2008
Posts: 2,466
Try using the <window>.screenToWorld command. Is this what you're looking for?
Code:
import viz
import vizact
viz.go()

viz.link( viz.Mouse,viz.addTexQuad(viz.SCREEN,texture=viz.add('crosshair.png')) )

def addBall():
	
	ball = viz.addChild('ball.wrl',cache=viz.CACHE_CLONE)
	line = viz.MainWindow.screenToWorld(viz.mouse.getPosition())
	pos = vizmat.MoveAlongVector(line.begin,line.dir,10)
	ball.setPosition(pos)
	
vizact.onmousedown(viz.MOUSEBUTTON_LEFT,addBall)

viz.mouse(viz.OFF)
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  #3  
Old 02-08-2011, 11:01 AM
jincheker jincheker is offline
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Join Date: Oct 2009
Posts: 15
Thanks Jeff, That works
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