WorldViz User Forum - Viewpoint Compass

WorldViz User Forum (https://forum.worldviz.com/index.php)

- Vizard (https://forum.worldviz.com/forumdisplay.php?f=17)

- - Viewpoint Compass (https://forum.worldviz.com/showthread.php?t=2235)

Viewpoint Compass

Hi,

I am creating an application that has a pretty large CAD model and when the users are navigating through the model there have been complaints that they are losing track of where they are in the model. I want to create a "you-are-here" type window that the user can pop up on the screen.

I have been experimenting with addWindow() and addView() to get a top down view of the environment. I would like to be able to insert an arrow over this window that follows the position and orientation of the main viewpoint. Is this possible?

Thanks!

--
Patrick

Here is a sample script that shows how to overlay objects on a sub-window:

Code:

import viz

import vizact

viz.go()



#Add the room and arrow

room = viz.add('gallery.ive')



# Create a new window in the upper left corner

UpperLeftWindow = viz.addWindow(pos=(0,1.0),size=(0.2,0.2))

UpperLeftWindow.visible(0,viz.SCREEN)



# Create a new viewpoint

BirdView = viz.addView()



#Attach the bird's eye view to the upper left window

UpperLeftWindow.setView(BirdView)



#Move the view above the center of the room

BirdView.setPosition([0,9,0])



#Rotate the view so that it looks down

BirdView.setEuler([0,90,0])



#Overlay arrow on sub window (20x20 pixels)

arrow = viz.addTexQuad(parent=viz.ORTHO,scene=UpperLeftWindow,size=20)

arrow.texture(viz.add('arrow.tif'))



def UpdateArrow():

        

        #Get the current head orientation and position

        yaw,pitch,roll = viz.MainView.getEuler()

        pos = viz.MainView.getPosition()

        

        # Place arrow on top of viewpoint

        x,y,z = UpperLeftWindow.worldToScreen(pos,mode=viz.WINDOW_PIXELS)

        arrow.setPosition([x,y,0])

        

        # Rotate arrow to match yaw rotation

        arrow.setEuler([0,0,-yaw])

        

vizact.ontimer(0,UpdateArrow)

That worked well for me, thanks for your help!