WorldViz User Forum - Mouse zoom

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- - Mouse zoom (https://forum.worldviz.com/showthread.php?t=3009)

Renato Lima

10-08-2010 12:58 PM

Mouse zoom

I am using camera = vizcam.PivotNavigate(center=[0, 2, 2], distance=2.5)

The mouse wheel reduces the zoom factor exponentially as I zoom into some object. How do I make it stop or change this behavior?

farshizzo

10-08-2010 01:18 PM

Create your own class that inherits from PivotNavigate and override the mouse wheel behavior:

Code:

class MyPivotNavigate(vizcam.PivotNavigate):



        def _camMouseWheel(self,e):



                # Compute new distance base on mouse wheel

                dist = self.getDistance() - e.dir



                # Make sure distance does not drop below zero

                dist = max(dist,0.01)



                # Apply new distance

                self.setDistance(dist)



cam = MyPivotNavigate()

kovitch

05-04-2012 08:06 AM

Hi,

Is there a way to override mouse wheel in the Panorama Camera class?

All I want is a Panorama Camera with the zoom in and zoom out capabilities.

Best regards,

Alex.

kovitch

05-04-2012 10:02 AM

Solved. Changing the Field of View is enough for my purposes.

For those who care:

Code:

def onMouseWheel(dir):

        if dir == 1:

                viz.fov(40,1.3333)

        else:

                viz.fov(70,1.3333)

viz.callback(viz.MOUSEWHEEL_EVENT,onMouseWheel)

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