3D displays

General Discussion
#1

Does anyone have experience using Panda3D with 3D displays?

dti3d.com/component/option,c … Itemid,94/

I have the impression that it will be relatively straightforward, but I seek some confirmation before proceeding to familiarize myself with Panda3D (Java3D was used previously). Is it simply a matter of defining two cameras? Perhaps, as explained here?:
panda3d.org/manual/index.php/Multi-Pass_Rendering

I will appreciate any feedback I receive.

#2

i once wrote a small 3d-panoramic-viewer.
the cameras are not positioned as you would like them to be but the rest is pretty much what you’r looking for.

class PanoramaDemo(DirectObject):

    def __init__(self):
    
            
        # Camera 1
        self.my_cam1 = Camera("cam1")
        ## my_cam1.setScene(land)
        self.my_camera1 = render.attachNewNode(self.my_cam1)
        self.my_camera1.setName("camera1")
        self.my_camera1.setPos(0,20,0)

        # Camera 2
        self.my_cam2 = Camera("cam2")
        self.my_camera2 = render.attachNewNode(self.my_cam2)
        self.my_camera2.setName("camera2")
        self.my_camera2.setPos(0,-20,0)

    
        dr = base.camNode.getDisplayRegion(0)
        dr.setActive(0) # Or leave it (dr.setActive(1))

        # Now, make a new pair of side-by-side DisplayRegions.
        window = dr.getWindow()
        dr1 = window.makeDisplayRegion(0, 0.5, 0, .75)
        dr1.setSort(dr.getSort())
        dr2 = window.makeDisplayRegion(0.5, 1, 0, .75)
        dr2.setSort(dr.getSort())
        # A smaller window

        # Setup each camera.
        dr1.setCamera(self.my_camera1)
        dr2.setCamera(self.my_camera2)
#3

Thomas’ solution is perfectly correct. But note also that Panda has built-in support for stereo, and with it you can define your two views as the left and right eyes of a stereo camera. This makes it a little more automatic to set up the convergence distance and so forth; it is also a slight optimization because Panda knows it needs to perform the cull operation only once for both left and right views.

from direct.directbase.DirectStart import *
from pandac.PandaModules import *

def splitScreen():
    """ This function splits the main display region into two separate
    left-and-right regions, which represent the left and right eye of
    the camera. """

    # First, disable the default DisplayRegion, which covers the whole
    # screen.
    dr = base.camNode.getDisplayRegion(0)
    dr.setActive(0)

    # Now, make a new pair of side-by-side DisplayRegions.
    window = dr.getWindow()
    dr1 = window.makeDisplayRegion(0, 0.5, 0, 1)
    dr1.setSort(dr.getSort())
    dr2 = window.makeDisplayRegion(0.5, 1, 0, 1)
    dr2.setSort(dr.getSort())

    # Set these both up to use the same camera.
    dr1.setCamera(base.cam)
    dr2.setCamera(base.cam)

    # And make them into left and right stereo pairs.
    dr1.setStereoChannel(Lens.SCLeft)
    dr2.setStereoChannel(Lens.SCRight)

David

#4

Thank you both for the feedback.