Esempio n. 1
0
    def attachViewToGlasses(self, visNode):
        """
		Create tracker object that represents the users head position, specifically the center of the eyes.
		The position provided by the head tracker must be in the same reference frame as the cave wall coordinates.
		This will normally be a tracking sensor, but for this example we will simulate a head tracker
		using the keyboard (WASD keys).
		"""
        self.head_tracker = viz.link(visNode,
                                     viz.NullLinkable,
                                     srcFlag=viz.ABS_PARENT)
        """
		Create CaveView object for manipulating the virtual viewpoint.
		cave_origin is a node that controls the position of the cave within the virtual world.
		For example, if you wanted to simulate the cave user flying through an environment,
		you would apply the transformation to the cave_origin node.
		"""
        cave_origin = vizcave.CaveView(self.head_tracker)
        """
		The cave_origin node is a standard Vizard node that you can apply any position/rotation to.
		In this example we will create a keyboard/mouse tracker (using arrow keys) and link it to
		the cave_origin node, allowing us to  fly the cave user through the virtual environment.
		"""

        origin_tracker = viztracker.KeyboardMouse6DOF()
        origin_link = viz.link(origin_tracker, cave_origin)
        origin_link.setMask(viz.LINK_POS)

        #head_tracker.setMask(viz.LINK_POS)
        """
		Pass the head tracker to the cave object so it can automatically update the
		view frustums every frame based on the current head position relative to each wall.
		"""
        self.cave.setTracker(self.head_tracker)
Esempio n. 2
0
    def __init__(self):
        viz.EventClass.__init__(self)

        self.EH = 1.2
        Proj_Dist = 1.0  #front projection distance to Eye

        Proj_V_F = 1.115  #vertical extent of projection (m)
        Proj_H_F = 1.985  #1.96#horizontal extent of projection (m)

        Proj_HfG = .665  #Front projection height from ground.

        FB = Proj_HfG  #FrontBottom
        FT = Proj_HfG + Proj_V_F  #FrontTop

        FL = -Proj_H_F / 2  #Front Left
        FR = Proj_H_F / 2  #Front Right

        FC0 = FL, FB, Proj_Dist  # Front  Wall: FC0,FC1,FC2,FC3
        FC1 = FR, FB, Proj_Dist
        FC2 = FL, FT, Proj_Dist
        FC3 = FR, FT, Proj_Dist

        self.FrontWall = vizcave.Wall(upperLeft=FC2,
                                      upperRight=FC3,
                                      lowerLeft=FC0,
                                      lowerRight=FC1,
                                      name='Front Wall')  #Create front wall

        viz.setMultiSample(8)  #set anti-aliasing

        #Initialize graphics window
        viz.go()
        #	viz.eyeheight(1.2)
        #for monitor in viz.window.getMonitorList():
        #    print monitor.name
        #    print '   ',monitor

        viz.window.setFullscreenMonitor(2)
        viz.window.setFullscreen(viz.ON)

        self.cave = vizcave.Cave(stereo=0)
        self.cave.addWall(self.FrontWall)  #,window=self.frontWindow)

        # print ("1_N: ", self.cave.getNearPlane()) #default is [.1, -1.]
        # print ("1_F: ", self.cave.getFarPlane())

        #set near and far plane.
        self.cave.setNearPlane(1.0)
        self.cave.setFarPlane(100.0)

        view = viz.MainView

        self.track = viztracker.Keyboard6DOF()  #tracker object
        self.track.setPosition(0, self.EH, 0)
        viz.link(self.track, view)  #linked to mainview
        self.cave.setTracker(pos=self.track)
        ##Create CaveView object for manipulating the entire cave environment
        ##The caveorigin is a node that can be adjusted to move the entire cave around the virtual environment, it needs a tracker object to initialise it.
        self.caveview = vizcave.CaveView(self.track)
def initDisplays(initFlag=vizconnect.INIT_INDEPENDENT, initList=None):
    #VC: place any general initialization code here
    rawDisplay = vizconnect.getRawDisplayDict()

    #VC: initialize a new display
    CAVE_CONFIG_NAME = 'cave_manual_configuration'

    if vizconnect.isPendingInit('display', CAVE_CONFIG_NAME, initFlag,
                                initList):
        #VC: init which needs to happen before viz.go
        if initFlag & vizconnect.INIT_PREVIZGO:
            viz.setOption('viz.stereo', viz.QUAD_BUFFER)

        #VC: init the raw object
        if initFlag & vizconnect.INIT_RAW:
            #VC: set the window for the display
            _window = viz.MainWindow

            #APG: constants, 5 total instances running...
            FRONT_WALL_CLUSTER_CLIENT = viz.CLIENT1
            LEFT_WALL_CLUSTER_CLIENT = viz.CLIENT2
            RIGHT_WALL_CLUSTER_CLIENT = viz.CLIENT3
            FLOOR_LEFT_CLUSTER_CLIENT = viz.CLIENT4
            FLOOR_RIGHT_CLUSTER_CLIENT = viz.CLIENT5

            #These are determined by testing the monitors
            FRONT_WALL_MONITOR_ID = 1
            LEFT_WALL_MONITOR_ID = 4
            RIGHT_WALL_MONITOR_ID = 5
            FLOOR_LEFT_MONITOR_ID = 3
            FLOOR_RIGHT_MONITOR_ID = 2

            #==============================================
            #Cave calculations

            #VC: create the raw object
            # Create a cave object
            import vizcave
            cave = vizcave.Cave(stereo=viz.QUAD_BUFFER)

            # get an origin node
            originName = CAVE_CONFIG_NAME
            initGroups(vizconnect.INIT_INDEPENDENT,
                       [originName])  # ensure it's been created
            originNode = vizconnect.getGroup(originName).getNode3d()

            frontImageWidth = 5.5372
            imageHeight = 2.2225
            imageRise = 0.0
            originLeft = 3.5503
            originRight = 3.5503
            sideImageWidth = 2.9591
            shiftRight = 0
            shiftUp = 0
            shiftForward = 0

            # get the originLeft angle from the origin measurements
            import math
            aOR = math.pi / 4.0
            aAOR = (originRight**2 - originLeft**2 -
                    frontImageWidth**2) / (-2 * originLeft * frontImageWidth)
            if abs(aAOR) <= 1:
                aOR = math.acos(aAOR)

            # convert the angle to front and right shifts
            Sr = -(math.cos(aOR) * originLeft - frontImageWidth / 2.0)
            Sf = (math.sin(aOR) * originLeft - sideImageWidth / 2.0)

            # find left/right, up/down, front/back (x,y,z) extent of caves
            R = frontImageWidth / 2.0 + Sr + shiftRight  # right
            L = -frontImageWidth / 2.0 + Sr + shiftRight  # left
            U = imageRise + imageHeight + shiftUp  # up/top
            D = imageRise + shiftUp  # bottom/down
            F = sideImageWidth / 2.0 + Sf + shiftForward  # front
            B = -sideImageWidth / 2.0 + Sf + shiftForward  # back

            # find corners
            # e.g.
            # Front Wall: C1,C2,C5,C6
            # Left  Wall: C0,C1,C4,C5
            # Right Wall: C2,C3,C6,C7
            C0 = L, U, B
            C1 = L, U, F
            C2 = R, U, F
            C3 = R, U, B
            C4 = L, D, B
            C5 = L, D, F
            C6 = R, D, F
            C7 = R, D, B
            C8 = L, D, 0
            C9 = R, D, 0
            C10 = -0.19939, D, F
            C11 = 0.19939, D, F
            C12 = -0.19939, D, 0
            C13 = 0.19939, D, 0

            #			wall_list = [C0, C1, C2, C3, C4,
            #						C5, C6, C7, C8,
            #						C9, C10, C11, C12, C13]
            #
            #			for item in wall_list:
            #				print(item)

            #==============================================

            WALL_CORNERS = "corners"
            WALL_NAME = "name"
            WALL_CLUSTER_ID = "cluster_id"
            WALL_MONITOR_ID = "monitor_id"

            #Creates wall, then adds it to the vizcave obj
            def config_wall(wall_config, window):
                points = wall_config[WALL_CORNERS]
                cluster_client_id = wall_config[WALL_CLUSTER_ID]
                monitor_id = wall_config[WALL_MONITOR_ID]

                new_wall = vizcave.Wall(upperLeft=points[0],
                                        upperRight=points[1],
                                        lowerLeft=points[2],
                                        lowerRight=points[3],
                                        name=wall_config[WALL_NAME])

                cave.addWall(new_wall, mask=cluster_client_id, window=window)

                with viz.cluster.MaskedContext(cluster_client_id):
                    viz.window.setFullscreenMonitor(monitor_id)
                    _window.setStereoSwap(False)
                    viz.window.setFullscreen(True)

            #Create front wall
            #==================================
            wall_config = {}
            wall_config[WALL_CORNERS] = [C1, C2, C5, C6]
            wall_config[WALL_NAME] = "Front Wall"
            wall_config[WALL_CLUSTER_ID] = FRONT_WALL_CLUSTER_CLIENT
            wall_config[WALL_MONITOR_ID] = FRONT_WALL_MONITOR_ID

            config_wall(wall_config, _window)

            #Create right wall
            #==================================
            wall_config = {}
            wall_config[WALL_CORNERS] = [C2, C3, C6, C7]
            wall_config[WALL_NAME] = "Right Wall"
            wall_config[WALL_CLUSTER_ID] = RIGHT_WALL_CLUSTER_CLIENT
            wall_config[WALL_MONITOR_ID] = RIGHT_WALL_MONITOR_ID

            config_wall(wall_config, _window)

            # #Create left wall
            # #=================================
            wall_config = {}
            wall_config[WALL_CORNERS] = [C0, C1, C4, C5]
            wall_config[WALL_NAME] = "Left Wall"
            wall_config[WALL_CLUSTER_ID] = LEFT_WALL_CLUSTER_CLIENT
            wall_config[WALL_MONITOR_ID] = LEFT_WALL_MONITOR_ID

            config_wall(wall_config, _window)

            #Create floor_left
            #==================================
            wall_config = {}
            wall_config[WALL_CORNERS] = [C5, C11, C8, C13]
            wall_config[WALL_NAME] = "Floor Left"
            wall_config[WALL_CLUSTER_ID] = FLOOR_LEFT_CLUSTER_CLIENT
            wall_config[WALL_MONITOR_ID] = FLOOR_LEFT_MONITOR_ID

            config_wall(wall_config, _window)

            #Create floor_right
            #==================================
            wall_config = {}
            wall_config[WALL_CORNERS] = [C10, C6, C12, C9]
            wall_config[WALL_NAME] = "Floor Right"
            wall_config[WALL_CLUSTER_ID] = FLOOR_RIGHT_CLUSTER_CLIENT
            wall_config[WALL_MONITOR_ID] = FLOOR_RIGHT_MONITOR_ID

            config_wall(wall_config, _window)

            #==================================

            # We need to pass an object which will be used to update the projection
            # or the display to the view's position, typically this would be the
            # node attached to an avatar's head tracker.
            viewpoint = viz.addGroup()
            cave.setTracker(viewpoint)

            # Create a CaveView object for manipulating the entire cave environment.
            # The caveView is a node that can be adjusted to move the entire
            # cave around the virtual environment.
            caveView = vizcave.CaveView(viewpoint)

            _window.originLink = viz.link(originNode,
                                          caveView,
                                          dstFlag=viz.ABS_GLOBAL,
                                          srcFlag=viz.ABS_GLOBAL)
            _window.caveView = caveView
            _window.originNode = originNode
            _window.displayNode = cave
            _window.viewpointNode = viewpoint

            rawDisplay[CAVE_CONFIG_NAME] = _window

        #VC: init the wrapper (DO NOT EDIT)
        if initFlag & vizconnect.INIT_WRAPPERS:
            vizconnect.addDisplay(rawDisplay[CAVE_CONFIG_NAME],
                                  CAVE_CONFIG_NAME,
                                  make='Generic',
                                  model='Cave Manual Configuration')

        #VC: set the parent of the node
        if initFlag & vizconnect.INIT_PARENTS:
            vizconnect.getDisplay(CAVE_CONFIG_NAME).setParent(
                vizconnect.getAvatar('head_and_hand').getAttachmentPoint(
                    'head'))

    #VC: set the name of the default
    vizconnect.setDefault('display', 'cave_manual_configuration')

    #VC: return values can be modified here
    return None
def initDisplays(initFlag=vizconnect.INIT_INDEPENDENT, initList=None):
	#VC: place any general initialization code here
	rawDisplay = vizconnect.getRawDisplayDict()
	

	#VC: initialize a new display
	_name = 'cave_manual_configuration'
	if vizconnect.isPendingInit('display', _name, initFlag, initList):
		#VC: init which needs to happen before viz.go
		if initFlag&vizconnect.INIT_PREVIZGO:
			#viz.setOption('viz.stereo', viz.QUAD_BUFFER)
			viz.setOption('viz.fullscreen', 1)
			viz.setOption('viz.antialias', 8)
	
		#VC: init the raw object
		if initFlag&vizconnect.INIT_RAW:
			#VC: set the window for the display
			_window = viz.MainWindow
			
			#VC: set some parameters
			frontWall = [1,2]
			rightWall = [3,4]
			backWall = -1
			leftWall = [5,6]
			floor = -1
			ceiling = -1
			frontImageWidth = 3.6
			imageHeight = 2.5
			imageRise = 0.02
			originLeft = 1.725
			originRight = 2.205
			sideImageWidth = 4
			shiftRight = 0
			shiftUp = 0
			shiftForward = 0
			stereo = viz.QUAD_BUFFER
			frontWallSwapStereo = False
			rightWallSwapStereo = False
			backWallSwapStereo = False
			leftWallSwapStereo = False
			floorSwapStereo = False
			ceilingSwapStereo = False
			
			#VC: create the raw object
			# Create a cave object
			import vizcave
			cave = vizcave.Cave(stereo=stereo)
			
			# get an origin node
			originName = _name
			initGroups(vizconnect.INIT_INDEPENDENT, [originName])# ensure it's been created
			originNode = vizconnect.getGroup(originName).getNode3d()
			
			if sideImageWidth == 0:
				sideImageWidth = frontImageWidth
			
			# extra configuration options to more explicitly control which wall goes where.
			frontWallClientIndex=-1
			rightWallClientIndex=-1
			backWallClientIndex=-1
			leftWallClientIndex=-1
			floorClientIndex=-1
			ceilingClientIndex=-1
			
			# get the originLeft angle from the origin measurements
			import math
			aOR = math.pi/4.0
			aAOR = (originRight**2 - originLeft**2 - frontImageWidth**2)/(-2*originLeft*frontImageWidth)
			if abs(aAOR) <= 1:
				aOR = math.acos(aAOR)
			
			# convert the angle to front and right shifts
			Sr =-(math.cos(aOR)*originLeft-frontImageWidth/2.0)
			Sf = (math.sin(aOR)*originLeft-sideImageWidth/2.0)
			
			# find left/right, up/down, front/back (x,y,z) extent of caves
			R = frontImageWidth/2.0+Sr+shiftRight# right
			L =-frontImageWidth/2.0+Sr+shiftRight# left
			U = imageRise+imageHeight+shiftUp# up/top
			D = imageRise+shiftUp# bottom/down
			F = sideImageWidth/2.0+Sf+shiftForward# front
			B =-sideImageWidth/2.0+Sf+shiftForward# back
			
			# find corners
			# e.g.
			# Front Wall: C1,C2,C5,C6
			# Left  Wall: C0,C1,C4,C5
			# Right Wall: C2,C3,C6,C7
			C0 = L, U, B
			C1 = L, U, F
			C2 = R, U, F
			C3 = R, U, B
			C4 = L, D, B
			C5 = L, D, F
			C6 = R, D, F
			C7 = R, D, B
			
			clients = 0
			
			#Create front wall
			if frontWall >= 0:
				wall = vizcave.Wall(	upperLeft=C1,
										upperRight=C2,
										lowerLeft=C5,
										lowerRight=C6,
										name='Front Wall' )
				
				if frontWallClientIndex == -1:
					frontWallClientIndex = clients
				cave.addWall(wall, mask=2**frontWallClientIndex, window=_window)
				
				with viz.cluster.MaskedContext(2**frontWallClientIndex):
					# check if the fullscreen monitor is defined.
					viz.window.setFullscreenMonitor(frontWall)
					_window.setStereoSwap(frontWallSwapStereo)
					viz.window.setFullscreenRectangle([2563, 15, 2260, 1585])
					viz.window.setFullscreen(True)
				clients += 1
			
			#Create right wall
			if rightWall >= 0:
				wall = vizcave.Wall(	upperLeft=C2,
										upperRight=C3,
										lowerLeft=C6,
										lowerRight=C7,
										name='Right Wall' )
				
				if rightWallClientIndex == -1:
					rightWallClientIndex = clients
				cave.addWall(wall, mask=2**rightWallClientIndex, window=_window)
				
				with viz.cluster.MaskedContext(2**rightWallClientIndex):
					# check if the fullscreen monitor is defined.
					viz.window.setFullscreenMonitor(rightWall)
					_window.setStereoSwap(rightWallSwapStereo)
					viz.window.setFullscreenRectangle([5120, 12, 2526, 1587])
					viz.window.setFullscreen(True)
				clients += 1
			
			#Create back wall
			if backWall >= 0:
				wall = vizcave.Wall(	upperLeft=C3,
										upperRight=C0,
										lowerLeft=C7,
										lowerRight=C4,
										name='Back Wall' )
				
				if backWallClientIndex == -1:
					backWallClientIndex = clients
				cave.addWall(wall, mask=2**backWallClientIndex, window=_window)
				
				with viz.cluster.MaskedContext(2**backWallClientIndex):
					# check if the fullscreen monitor is defined.
					viz.window.setFullscreenMonitor(backWall)
					_window.setStereoSwap(backWallSwapStereo)
					viz.window.setFullscreen(True)
				clients += 1
			
			#Create left wall
			if leftWall >= 0:
				wall = vizcave.Wall(	upperLeft=C0,
										upperRight=C1,
										lowerLeft=C4,
										lowerRight=C5,
										name='Left Wall' )
				
				leftWallClientIndex = clients
				cave.addWall(wall, mask=2**leftWallClientIndex, window=_window)
				
				with viz.cluster.MaskedContext(2**leftWallClientIndex):
					# check if the fullscreen monitor is defined.
					viz.window.setFullscreenMonitor(leftWall)
					_window.setStereoSwap(leftWallSwapStereo)
					viz.window.setFullscreenRectangle([32, 20, 2525, 1580])
					viz.window.setFullscreen(True)
				clients += 1
			
			#Create floor
			if floor >= 0:
				wall = vizcave.Wall(	upperLeft=C5,
										upperRight=C6,
										lowerLeft=C4,
										lowerRight=C7,
										name='Floor' )
				
				floorClientIndex = clients
				cave.addWall(wall, mask=2**floorClientIndex, window=_window)
				
				with viz.cluster.MaskedContext(2**floorClientIndex):
					# check if the fullscreen monitor is defined.
					viz.window.setFullscreenMonitor(floor)
					_window.setStereoSwap(floorSwapStereo)
					viz.window.setFullscreen(True)
				clients += 1
			
			#Create ceiling
			if ceiling >= 0:
				wall = vizcave.Wall(	upperLeft=C0,
										upperRight=C3,
										lowerLeft=C1,
										lowerRight=C2,
										name='Ceiling' )
				
				ceilingClientIndex = clients
				cave.addWall(wall, mask=2**ceilingClientIndex, window=_window)
				
				with viz.cluster.MaskedContext(2**ceilingClientIndex):
					# check if the fullscreen monitor is defined.
					viz.window.setFullscreenMonitor(ceiling)
					_window.setStereoSwap(ceilingSwapStereo)
					viz.window.setFullscreen(True)
				clients += 1
			
			# We need to pass an object which will be used to update the projection
			# or the display to the view's position, typically this would be the
			# node attached to an avatar's head tracker. 
			viewpoint = viz.addGroup()
			cave.setTracker(viewpoint)
			
			# Create a CaveView object for manipulating the entire cave environment.
			# The caveView is a node that can be adjusted to move the entire 
			# cave around the virtual environment.
			caveView = vizcave.CaveView(viewpoint)
			
			_window.originLink = viz.link(originNode, caveView, dstFlag=viz.ABS_GLOBAL, srcFlag=viz.ABS_GLOBAL)
			_window.caveView = caveView
			_window.originNode = originNode
			_window.displayNode = cave
			_window.viewpointNode = viewpoint
			
			
			rawDisplay[_name] = _window
	
		#VC: init the wrapper (DO NOT EDIT)
		if initFlag&vizconnect.INIT_WRAPPERS:
			vizconnect.addDisplay(rawDisplay[_name], _name, make='Generic', model='Cave Manual Configuration')
	
		#VC: set the parent of the node
		if initFlag&vizconnect.INIT_PARENTS:
			vizconnect.getDisplay(_name).setParent(vizconnect.getAvatar('head_and_hand').getAttachmentPoint('head'))

	#VC: return values can be modified here
	return None
def initDisplays(initFlag=vizconnect.INIT_INDEPENDENT, initList=None):
    #VC: place any general initialization code here
    rawDisplay = vizconnect.getRawDisplayDict()

    #VC: initialize a new display
    _name = 'cave_data_file'
    if vizconnect.isPendingInit('display', _name, initFlag, initList):
        #VC: init which needs to happen before viz.go
        if initFlag & vizconnect.INIT_PREVIZGO:
            viz.setOption('viz.stereo', viz.QUAD_BUFFER)
            viz.setOption('viz.fullscreen', 1)

        #VC: init the raw object
        if initFlag & vizconnect.INIT_RAW:
            #VC: set the window for the display
            _window = viz.MainWindow

            #VC: set some parameters
            stereo = viz.QUAD_BUFFER
            filename = 'C:/demos/Cave_settings.txt'

            #VC: create the raw object
            # Create a cave object
            import vizcave
            cave = vizcave.Cave(stereo=stereo)
            try:
                cave.load(filename)
            except IOError:
                viz.logError(
                    "** Error: unable to load cave configuration file {}.".
                    format(filename))

            # get an origin node
            originName = _name
            initGroups(vizconnect.INIT_INDEPENDENT,
                       [originName])  # ensure it's been created
            originNode = vizconnect.getGroup(originName).getNode3d()

            # We need to pass an object which will be used to update the projection
            # or the display to the view's position, typically this would be the
            # node attached to an avatar's head tracker.
            viewpoint = viz.addGroup()
            cave.setTracker(viewpoint)

            # Create a CaveView object for manipulating the entire cave environment.
            # The caveView is a node that can be adjusted to move the entire
            # cave around the virtual environment.
            caveView = vizcave.CaveView(viewpoint)

            _window.originLink = viz.link(originNode,
                                          caveView,
                                          dstFlag=viz.ABS_GLOBAL,
                                          srcFlag=viz.ABS_GLOBAL)
            _window.caveView = caveView
            _window.originNode = originNode
            _window.displayNode = cave
            _window.viewpointNode = viewpoint

            rawDisplay[_name] = _window

        #VC: init the wrapper (DO NOT EDIT)
        if initFlag & vizconnect.INIT_WRAPPERS:
            vizconnect.addDisplay(rawDisplay[_name],
                                  _name,
                                  make='Generic',
                                  model='Cave Data File')

        #VC: set the parent of the node
        if initFlag & vizconnect.INIT_PARENTS:
            vizconnect.getDisplay(_name).setParent(
                vizconnect.getAvatar('head_and_hand').getAttachmentPoint(
                    'head'))

    #VC: return values can be modified here
    return None
def initDisplays(initFlag=vizconnect.INIT_INDEPENDENT, initList=None):
    #VC: place any general initialization code here
    rawDisplay = vizconnect.getRawDisplayDict()

    #VC: initialize a new display
    _name = 'main_display'
    if vizconnect.isPendingInit('display', _name, initFlag, initList):
        #VC: init which needs to happen before viz.go
        if initFlag & vizconnect.INIT_PREVIZGO:
            viz.setOption('viz.stereo', viz.QUAD_BUFFER)
            viz.setOption('viz.fullscreen', 1)

        #VC: init the raw object
        if initFlag & vizconnect.INIT_RAW:
            #VC: set the window for the display
            _window = viz.MainWindow

            #VC: set some parameters
            imageWidth = 3
            imageHeight = 2.25
            imageRise = 0.045
            originLeft = 2.897
            originRight = 2.934
            shiftRight = 0
            shiftUp = 0
            shiftForward = 0
            stereo = viz.QUAD_BUFFER
            swapStereo = False

            #VC: create the raw object
            # Create a cave object
            import vizcave
            cave = vizcave.Cave(stereo=stereo)

            # get an origin node
            originName = _name
            initGroups(vizconnect.INIT_INDEPENDENT,
                       [originName])  # ensure it's been created
            originNode = vizconnect.getGroup(originName).getNode3d()

            # get the originLeft angle from the origin measurements
            import math
            aOR = math.pi / 4.0
            aAOR = (originRight**2 - originLeft**2 -
                    imageWidth**2) / (-2 * originLeft * imageWidth)
            if abs(aAOR) <= 1:
                aOR = math.acos(aAOR)

            # convert the angle to front and right shifts
            Sr = -(math.cos(aOR) * originLeft - imageWidth / 2.0)
            distanceToFront = math.sin(aOR) * originLeft

            # find left/right, up/down, front/back (x,y,z) extent of caves
            R = imageWidth / 2.0 + Sr + shiftRight  # right
            L = -imageWidth / 2.0 + Sr + shiftRight  # left
            U = imageRise + imageHeight + shiftUp  # up/top
            D = imageRise + shiftUp  # bottom/down
            F = distanceToFront + shiftForward  # front

            C0 = L, U, F
            C1 = R, U, F
            C2 = L, D, F
            C3 = R, D, F

            #Create front wall
            wall = vizcave.Wall(upperLeft=C0,
                                upperRight=C1,
                                lowerLeft=C2,
                                lowerRight=C3,
                                name='Front Wall')

            cave.addWall(wall, window=_window)

            _window.setStereoSwap(swapStereo)

            #_window.setSize([1, 1])

            # We need to pass an object which will be used to update the projection
            # or the display to the view's position, typically this would be the
            # node attached to an avatar's head tracker.
            viewpoint = viz.addGroup()
            cave.setTracker(viewpoint)

            # Create a CaveView object for manipulating the entire cave environment.
            # The caveView is a node that can be adjusted to move the entire
            # cave around the virtual environment.
            caveView = vizcave.CaveView(viewpoint, view=_window.getView())
            _window.originLink = viz.link(originNode,
                                          caveView,
                                          dstFlag=viz.ABS_GLOBAL,
                                          srcFlag=viz.ABS_GLOBAL)
            _window.caveView = caveView
            _window.originNode = originNode
            _window.displayNode = cave
            _window.viewpointNode = viewpoint

            rawDisplay[_name] = _window

        #VC: init the wrapper (DO NOT EDIT)
        if initFlag & vizconnect.INIT_WRAPPERS:
            vizconnect.addDisplay(rawDisplay[_name],
                                  _name,
                                  make='Generic',
                                  model='Powerwall')

        #VC: set the parent of the node
        if initFlag & vizconnect.INIT_PARENTS:
            vizconnect.getDisplay(_name).setParent(
                vizconnect.getAvatar('main_avatar').getAttachmentPoint('head'))

    #VC: set the name of the default
    vizconnect.setDefault('display', 'main_display')

    #VC: return values can be modified here
    return None