#1
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Flipped floor in a CAVE
Hello again ,
I am running Vizard on a 4 wall CAVE system at Rowan University. I have read your CAVE file and have tried to create one of our own for us to use with a Left, Right, Front and Bottom setup. However, I consistently run into an issue where the bottom node seems to be flipped. We are also running a PPT tracking system and an Inertia Cube 3 wireless sensor. I have setup the CAVE's center to be the literal center of the CAVE (height, width /2) Code:
import viz import vizcave import viztracker import math import VectorHelper def CaveInit(): #Center is always assumed to be the red box on #the floor of the CAVE (wallpaper) #Use the PPT Tracker Offset command to fix #where the true center is if adjustments are needed... #Y Height should always be positive #CAVE Dimensions in Meters CAVE_W = 3.048 CAVE_H = 2.286 #Half Cave Dimensions CAVE_W2 = CAVE_W / 2.0 # Half width CAVE_H2 = CAVE_H / 2.0 # Half height #CAVE Vertices # c0 c1 c2 c3 # *----*----*----* # | L | F | R | # *----*----*----* # c4 c5| B |c6 c7 # *----* # b4 b7 # C0 = -CAVE_W2,CAVE_H,-CAVE_W2 C1 = -CAVE_W2,CAVE_H,CAVE_W2 C2 = CAVE_W2,CAVE_H,CAVE_W2 C3 = CAVE_W2,CAVE_H,-CAVE_W2 C4 = -CAVE_W2,0,-CAVE_W2 C5 = -CAVE_W2,0,CAVE_W2 C6 = CAVE_W2,0,CAVE_W2 C7 = CAVE_W2,0,-CAVE_W2 #CAVE FLOOR OFFSET DUE TO THE DEPTH NOT EQUALING THE WIDTH OFFSET = 0.762 B4 = -CAVE_W2, 0, -CAVE_W2 + OFFSET B7 = CAVE_W2, 0, -CAVE_W2 + OFFSET # Create front wall FrontWall = vizcave.Wall( upperLeft=C1, upperRight=C2, lowerLeft=C5, lowerRight=C6, name='Front Wall' ) # Create left wall LeftWall = vizcave.Wall( upperLeft=C0, upperRight=C1, lowerLeft=C4, lowerRight=C5, name='Left Wall' ) # Create right wall RightWall = vizcave.Wall( upperLeft=C2, upperRight=C3, lowerLeft=C6, lowerRight=C7, name='Right Wall' ) # Create bottom wall BottomWall = vizcave.Wall( upperLeft=C5, upperRight=C6, lowerLeft=B4, lowerRight=B7, name='Bottom Wall' ) # Create cave object cave = vizcave.Cave() #cave.setIPD(0.06) #cave.setNearPlane(0.15) cave.setFarPlane(1000.0) viz.eyeheight(0) # Add walls to cave cave.addWall(FrontWall, mask=viz.MASTER) cave.addWall(LeftWall, mask=viz.CLIENT1) cave.addWall(FrontWall, mask=viz.CLIENT2) cave.addWall(BottomWall, mask=viz.CLIENT3) cave.addWall(RightWall, mask=viz.CLIENT4) return cave I don't know if it is not proper to set the center of the CAVE as my origin. The PPT system is set up "close" to that (not perfectly, but around head height) and a + Z-offset. Thank you for any help you can give and I hope you can help reduce my eye-strain from the bottom flipped node! This seems to happen from time to time and it is annoying as all heck! ~George |
#2
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Are you passing the raw ppt tracker object to the cave.setTracker function? Can you print out the PPT coordinates when the bottom view is flipped? Usually when a cave wall flips, it means that the users reported head position is behind the screen. This could be caused by a mis-configured cave or a problem with the tracking system.
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