Example code for VizCave

[farshizzo]

It seems to work fine for me. I created this small test that uses the arrow keys to move the view left/right/up/down. As you move to the edges of the cave wall, the image starts to skew.

import viz
import vizcave

viz.go()

c0 = -2,3,0
c1 = 2,3,0
c2 = 2,0,0
c3 = -2,0,0
vp = [0, 1.8, -2]

cave = vizcave.Cave()
FrontWall = vizcave.Wall(upperLeft=c0,upperRight=c1,lowerLeft= c3,lowerRight=c2,name='Front Wall' )
cave.addWall(FrontWall, mask =None, window = viz.MainWindow)

def UpdateCave():
	if viz.key.isDown(viz.KEY_LEFT):
		vp[0] -= 1*viz.elapsed()
	if viz.key.isDown(viz.KEY_RIGHT):
		vp[0] += 1*viz.elapsed()
	if viz.key.isDown(viz.KEY_UP):
		vp[1] += 1*viz.elapsed()
	if viz.key.isDown(viz.KEY_DOWN):
		vp[1] -= 1*viz.elapsed()
	cave.update(pos = vp)
	viz.MainView.translate(vp)
vizact.ontimer(0,UpdateCave)

viz.add('gallery.ive')

[stefs]

Thank you very much for providing this code, which helped me to resolve the problem. Apparently one has to update the current head position i two different places to make this work. BOTH in the cave object (cave.update()) AND in the main view (viz.MainView.translate()). This appears a little counterintuitive - but once you know it you can live with it...
Thanks again,
stefs

[farshizzo]

Yes, this seems to confuse a lot of people. The reason is that the the cave.update() function only needs to know the physical head position. The virtual head position can be something completely different, in this case it happens to be the same as the physical head position.

[jpriede]

Originally Posted by farshizzo

Yes, this seems to confuse a lot of people. The reason is that the the cave.update() function only needs to know the physical head position. The virtual head position can be something completely different, in this case it happens to be the same as the physical head position.

I am not understanding this. Any CAVE environment should have the virtual camera in the same position of the physical head position (relative to the CAVE frame of reference), right? If the virtual and physical head positions differ (again, relative to the CAVE frame of reference), than the perspective will not work out.... it would be like sitting in the front row at a movie theatre. In order for it to look right, the camera must be where your viewpoint is.

The CAVE can be moved around anywhere within the environment, but that doesn't change the virtual or physical head locations relative to the CAVE frame of reference, right?