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-   -   problem with stereo mode (https://forum.worldviz.com/showthread.php?t=785)

shivanangel 10-12-2006 10:51 AM

problem with stereo mode
 
Hi again,

I'm having a problem getting into stereo mode.

I have two demo's. The first demo runs just fine.

The second demo involves manipulating the camera's location with a game pad. However, whenever I try to use viz.QUAD_BUFFER, I don't get stereo mode.

Here is my code:

Code:


##Name    :George D. Lecakes Jr
##Created  : October 11, 2006
##Modified : October 11, 2006
##Descr    :        This program creates a viewport that centers around
##                                the translational properties of an object similar
##                                to that of a video game.
####################################################################

import viz

##############################################
##Game Pad Library Information
##############################################
import sid


viz.go(viz.QUAD_BUFFER)
viz.viewdist(-5)


##############################################
#Global Variables
##############################################

##Height from Interest

H = 0

##X from Interest

R = 0

##Z from Interest

I = 0


##############################################
##Reference Plane
##############################################

envio = viz.add('coords.obj')
envio.translate(0,-3,0)

##############################################
#Model of Interest
##############################################

modelOfInterest = viz.add('templateModel.obj')

##############################################
##Create a new viewpoint
##############################################

objectTracker = viz.add(viz.VIEWPOINT)

###############################################
##Get and set the main window to the viewpoint
###############################################

mainWindow = viz.get(viz.MAIN_WINDOW)
mainWindow.viewpoint(objectTracker)

###############################################
##Initialize Elements
###############################################

######################
##Object Of Interest
######################

interestx = 0
interesty = 0
interestz = 0

modelOfInterest.translate(interestx,interesty,interestz)

######################
##Viewpoint
######################

viewCoordx = 0
viewCoordy = 10
viewCoordz = 20

objectTracker.translate(viewCoordx,viewCoordy,viewCoordz)

###############################################
#Function Declarations
###############################################
def georgesTimer(timerNum):
       
        ## Get the translation information of the desired object
       
        #interest = modelOfInterest.get(viz.POSITION)
       
        ## Get the translation information of the viewpoint
       
        #viewCoords = objectTracker.get(viz.POSITION)
       
        ## See which gamepad button has been pressed
       
        global H
        global R
        global I
       
        global upCheck
       
        global interestx
        global interesty
        global interestz
       
        global viewCoordx
        global viewCoordy
        global viewCoordz
       
        upCheck = 0
       
        ## Up
       
        if sid.isbuttondown(7):
               
                diff = viewCoordy - interesty
                               
                ##  If view is above interest

                if  diff > 0:
                        H = (H + .1)
                        viewCoordy = (interesty + H)
                       
                ##  If View is below interet
       
                if diff < 0:
                        H = (H + .1)
                        viewCoordy = (interesty + H)
                       
                ## If View is equal to interest
       
                if diff == 0:
                        viewCoordy = 0
                        H = (H + .1)
                        viewCoordy = (interesty + H)
                                               
## Down
       
        if sid.isbuttondown(8):
               
                diff = viewCoordy - interesty
       
                ##  If view is above interest

                if  diff > 0:
                        H = (H - .1)
                        viewCoordy = (interesty + H)

                ##  If View is below interest
               
                if diff < 0:
                        H = (H - .1)
                        viewCoordy = (interesty - abs(H))
               
                ## If View is equal to interest
               
                if diff == 0:
                        viewCoordy = 0
                        H = (H - .1)       
                        viewCoordy = (interesty + H)
                       

##Forward
       
        if sid.isbuttondown(3):
               
                diff = viewCoordx - interestx
       
                ##  If view is above interest

                if  diff > 0:
                        R = (R + .1)
                        viewCoordx = (interestx + R)
                       
                ##  If View is below interet
       
                if diff < 0:
                        R = (R + .1)
                        viewCoordx = (interestx + R)
                       
                ## If View is equal to interest
       
                if diff == 0:
                        viewCoordx = 0
                        R = (R + .1)
                        viewCoordx = (interestx + R)
                       
##Backward       

        if sid.isbuttondown(2):
               
                diff = viewCoordx - interestx
       
                ##  If view is above interest

                if  diff > 0:
                        R = (R - .1)
                        viewCoordx = (interestx + R)

                ##  If View is below interest
               
                if diff < 0:
                        R = (R - .1)
                        viewCoordx = (interestx - abs(R))
               
                ## If View is equal to interest
               
                if diff == 0:
                        viewCoordx = 0
                        R = (R - .1)       
                        viewCoordx = (interestx + R)

##Left
       
        if sid.isbuttondown(1):
               
                diff = viewCoordz - interestz
       
                ##  If view is above interest

                if  diff > 0:
                        I = (I + .1)
                        viewCoordz = (interestz + I)
                       
                ##  If View is below interet
       
                if diff < 0:
                        I = (I + .1)
                        viewCoordz = (interestz + I)
                       
                ## If View is equal to interest
       
                if diff == 0:
                        viewCoordz = 0
                        I = (I + .1)
                        viewCoordz = (interestz + I)
                       
##Right       

        if sid.isbuttondown(4):
               
                diff = viewCoordz - interestz
       
                ##  If view is above interest

                if  diff > 0:
                        I = (I - .1)
                        viewCoordz = (interestz + I)

                ##  If View is below interest
               
                if diff < 0:
                        I = (I - .1)
                        viewCoordz = (interestz - abs(I))
               
                ## If View is equal to interest
               
                if diff == 0:
                        viewCoordz = 0
                        I = (I - .1)       
                        viewCoordz = (interestz + I)



        objectTracker.translate(viewCoordx,viewCoordy,viewCoordz)
        objectTracker.lookat(modelOfInterest.get(viz.POSITION))
        print viewCoordx

###############################################
##CallBack to Functions
###############################################

viz.callback(viz.TIMER_EVENT, georgesTimer)
viz.starttimer(0,0, viz.PERPETUAL)


farshizzo 10-13-2006 03:59 PM

Are you able to get QUAD_BUFFER working with other scripts? QUAD_BUFFER stereo mode only works with specific graphics cards, like the nVidia Quadro. Do you have a capable graphics card?

shivanangel 10-17-2006 07:26 AM

Yes, we are able to get it working with ANY other script we have. As long as we don't start messing with the camera's coordinates directly through scripting things are fine.
But in the code I supplied as well as another camera rig I developed, it will not enter stereo mode. We are were unable to force the 'planets' demo into stereo mode and we were wondering if there might be a similar problem there as well.

~~George
Rowan University
VR Laboratory

farshizzo 10-17-2006 09:58 AM

Hi,

I tested out your script with Vizard 2.5 and experienced the same problem you described. I tried it out with Vizard 3.0 and it works fine. The problem is not caused by manipulating the viewpoint, but by adding a new viewpoint to the main window. In your script the workaround would be to replace the following code:
Code:

##############################################
##Create a new viewpoint
##############################################

objectTracker = viz.add(viz.VIEWPOINT)

###############################################
##Get and set the main window to the viewpoint
###############################################

mainWindow = viz.get(viz.MAIN_WINDOW)
mainWindow.viewpoint(objectTracker)

with:
Code:

##############################################
##Get the main viewpoint
##############################################

objectTracker = viz.get(viz.MAIN_VIEWPOINT)

###############################################
##Get the main window
###############################################

mainWindow = viz.get(viz.MAIN_WINDOW)



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