WorldViz User Forum - Coordinates change

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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

Try using the .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)

Thanks Jeff, That works