METaL User Manual - Virtual Reality Applications Center
Contents
1. firmware is programmed to respond to an unen crypted IR signal Use of the encrypted IR emitters and glasses caused issues with synchronization The encryption seems to mainly be intended to prevent interoperation between brands not be tween facilities However this does mean that any new X 101 glasses purchased should be unencrypted to be compatible with VRAC systems 14 See http www xpand me products cinema 3d glasses x101 XPAN D is the eventual corporate descendant of NuVision NuVision was an early competitor to StereoGraphics makers of CrystalEyes glasses who is now owned by RealD a competing 3D cinema company Input For now see https github com vancegroup metal j conf readme for information on the input devices Software Scheduling METAL is a research facility supported by VRAC contracted IT ser vices and sharing lab space with other research groups Use of the facility for a given purpose shall be approved by VRAC before you start In order to monitor facility usage and allocate maintenance ef fort you must reserve preferably ahead of time the facility any time you use it Reservation is also for courtesy to others sharing the lab 5 The formerly available self service booking system was discontinued due space in 1121 Black l to policy reasons Making Reservations At this time all reservations must be made by requesting time via email The most recent contact person2. the cabinet anecdotally the sugar and wintergreen seem helpful Looking for a citation on this wintergreen and blood sugar e Drinking fountain is out the door around the corner down the hallway toward the bathrooms Looking for a citation on dehydra tion and motion sickness Severe VRISE e Stop and have the person sit down to assess how they are feeling e Call ISU Facilities Management 4 5100 for cleanup if needed e You may wish to inform jmvance iastate edu with information on the situation if possible Computers and networking THERE ARE THREE computers involved in METaL plus a tracker appliance see details on page 15 which are connected to two net works one external and one internal The internal network is dedi cated to communication within the system itself so it should be used preferentially during runtime There is a third lower speed network that is dedicated solely to communication between the touchpanel and the projectors Head node3 This computer figure 1 contains a single NVIDIA Quadro FX 5800 card and is connected to the far right display on the desk Its purpose is to be the primary compute node when running clustered applica tions as well as to serve as a control machine for the tracking system and other miscellaneous tasks It controls the only display on the desk that is not connected to a wall projector Render nodet This computer figure 2 is connected to two NVIDIA Quadro Plex
3. the robot should be plugged in and charging after use until the charger indicates a full battery lights e Software S drive is shared between both machines Hosted on render node for speed All users have full access so be polite don t delete files unless you are absolutely sure it s OK Try not to store personal files on the S drive these should go on the VRAC user folder so that they are properly backed up Any thing here might disappear at any time METAL USER MANUAL 37 Don t touch or even open the NVIDIA control panel settings The Bluetooth server computer is always on so there is no need to turn it off JConfs are on Github as well as on the shared S drive be tween the two machines JConf Visualizer on desktop can help you know what is defined If you have trouble connecting to the Wii Remote restart the VRPN server see the troubleshooting folder on the desktop e What to do if someone gets sick see Mild moderate VRISE sim ulator sickness Severe VRISE e Quick instructions for usage are on the desk e Putting items away Put equipment back in the proper labeled drawers Make sure to turn off unpair the Wii Remote before putting it away press and hold the power button on the Wii Remote The Wii Remote should be placed on the recharging station within the labeled cabinet after use or when leaving the room for an extended period of time The light on the char
4. 2200 D2 units for a total of four NVIDIA Quadro FX 5800 cards Only three are used for display purposes one per wall and a DVI extender also serves as a splitter to feed the same image sent to the projectors to the three left most displays on the desk Device server This computer hiding behind the left most monitor serves two pur poses First it serves device data via VRPN servers that are con stantly running This includes managing connections over Bluetooth to the Wii Remotes In addition it also powers the display board the LCD on the top shelf of the left desk which cycles through a number of slides including a live look at the schedule 3 metal vrac iastate edu or 192 168 1 20 on the internal network Figure 1 Head node the top rack mounted server metal render vrac iastate edu or 192 168 1 21 on the internal network Figure 2 Render node the bottom rack mounted server You ll just have to trust me that this is a picture of a different computer 5 metal devices vrac iastate edu or 192 168 1 23 on the internal network The VRPN system s build and configuration is developed at https github com vancegroup metal devices server 14 ISU VRAC HCI Tracking AN ART TRACKPACK 4 SYSTEM provides position and orientation tracking in the physical volume Its components and configuration are discussed below When the tracking system is enabled the ART track Controller TP sends tracking update
5. 3 00 01 2 Client 1600 x 1200 pixels 60 000 Hz The display is locked to the frame lock sync pulse Monitor Client Stereo is in phase with the server METAL USER MANUAL 23 Figure 12 Expected Topol ogy page when everything is working right Display XPAN D X 101 Active Stereo Glasses These glasses are made by XPAN D for use in digital cinemas They are pictured in Figure 4 with the tracking target attached though note that only one pair of glasses is tracked The stereo glasses alter nate which lens is transparent based on infrared signals from emit ters positioned near the projector mirrors to synchronize with the correct viewpoint right or left eye They automatically turn on and off based on whether they see infrared signals so it s very important to put them away in the cabinet after use to conserve battery power The manufacturer claims 250 hours of battery life but we haven t been seeing results that good When new the batteries produce roughly 3 2 V The glasses stop working when the voltage drops to about 2 9 V Signs that the batter ies may be dead include pulsing flashing of the lenses instead of the expected behavior The battery for each pair of glasses is a CR 2032 inside of a proprietary plastic casing X Battery that is most easily removed with a special tool If glasses stop working please contact VRAC IT The glasses used in METaL are different than most new X 101 glasses in that their
6. 606066 0606 D HIC Disabled A Less 40 Normal Inlet 25 C Outlet 31 C In Out Not present Present Synchronize Displays A Less 0x76 Disabled SLI Multi View Connected Samsung SyncMaster 1 of 3 Manage EDID Not connected Manage EDID Not connected Manage EDID 4096 MB less 610 MHz 800 MHz 540c PCI Express x16 Gen2 62 00 79 00 01 24 Client 1600 x 1200 pixels 60 000 Hz The display is locked to the frame lock syne pulse Monitor Client Stereo is in phase with the server Disabled SLI Multi View Not connected Manage EDID Not connected Manage EDID Not connected Manage EDID 4096 MB A Less 610 MHz 800 MHz 51 C PCI Express x16 Gen2 62 00 79 00 01 35 Disabled A Less 40 Normal Inlet 26 C Outlet 33 C Out Out Not present Present Synchronize Displays A Less 0x76 Disabled SLI Multi view Connected Samsung SyncMaster 2 of 3 Manage EDID Not connected Manage EDID Not connected Manage EDID 4096 MB A Less 610 MHz 800 MHz 57 C PCI Express x16 Gen2 62 00 79 00 01 35 Server 1600 x 1200 pixels 60 000 Hz The display is lacked to an internal timing signal Monitor Disabled SLI Muli View Connected Samsung SyncMaster 3 of 3 Manage EDID Not connected Manage EDID Not connected Manage EDID 4096 MB A Less 610 MHz 800 MHz 52 C PCI Express x16 Gen2 62 00 7
7. GitHub repository so it s always up to date METAL consists of e Two walls and the floor of a 12 x9 x9 4m x 3m x 3m space e An ART TrackPack 4 system tracks the position and orientation of a user s head wand and other objects in the space 6 ISU VRAC HCI Computational resources are provided by a head node with graphics on all walls generated by a render node Each of these two nodes is a rack mounted server running either Red Hat Enterprise Linux 6 or Windows XP x64 contain ing Dual Intel Xeon X5677 quad core processors 24 GB of RAM A Creative Sound Blaster X Fi Titanium sound card The head node contains an NVIDIA Quadro FX 5800 card to power a 24 LCD display The render node connects to two NVIDIA Quadro Plex 2200 D2 visual computing systems each of which contains two NVIDIA Quadro PX 5800 cards and an NVIDIA G Sync II card to pro vide framelocked rendering of active stereo graphics The three Digital Projection International TITAN WUXGA 3D projectors display active stereo at 1600x1200x1200 pixels each producing 5 28 megapixels across 297 sq ft 33 m2 of display surfaces Surround audio generated by either node is transferred over a digital optical link to a Yamaha RX V367 receiver and played over a 5 1 surround sound system One gigabit Ethernet switch is dedicated to system control track ing data and internal communication while a second gigabit Ethernet switch provi
8. ISU VRAC HCI METAL USER MANUAL 2 ISU VRAC HCI Students Leif Berg Meisha Rosenberg and Ryan Pavlik work in METaL Photo credit Bob Elbert This document is collaboratively maintained Source PDF The document you re reading was generated formatted February 21 2014 Contents Tech Specs 5 Troubleshooting 7 In Case Of 11 Computers and networking 13 Tracking 15 Graphics 19 Display 25 Input 27 Software 29 Scheduling 31 Bibliography 33 4 ISU VRAC HCI Training Checklist 35 Quick Start Guide Windows 39 Tech Specs ME lal MULTIMODAL EXPERIENCE TESTBED AND LABORATORY METAL MULTIMODAL EXPERIENCE TESTBED AND LABORATORY IS A HUMAN SCALE IMMERSIVE ENVIRONMENT for development of natural interaction techniques in virtual reality This facility supports rapid development iteration and is comparable to virtual reality systems found in industry Integration of haptic force feedback with visual display audio effects and physical simulation permits the creation of multimodal experiences Also see http vrac iastate edu The latest version of this User Manual in PDF format is avail nately able from the Vance Group public documentation page http www vrac iastate edu vancegroup docs This is maintained col laboratively it is composed edited with LyX with source maintained on GitHub https github com vancegroup metal instructions The public PDF is updated every time changes are pushed to the
9. ain monitor display the taskbar on this display If all was well cancel out else apply perhaps reboot then continue 2 Open the NVIDIA Control Panel 3 Under Synchronize Displays choose to disable synchronization If I remember correctly that s done by Workstation Synchro nize Displays choosing On another system and applying that change 4 Under Display Change Resolution set the appropriate set tings for the three monitors They need a custom resolution 1600x1200 60Hz CVT with Reduced Blanking See figure 9 Ap ply the changes and wait 5 In Manage 3D settings choose the Base Group and make sure that Stereo is enabled see figure 10 Apply and wait 6 Go to Workstation Synchronize Displays Choose that the Tim ing Server is on this system and click the second middle display This selection is actually a configuration option that is easily bro ken since it defaults to the first display every time you open this panel Server Settings should state that it is using its internal signal for sync Be sure that the other two displays are checked as active For an image of what this should look like see figure 11 Apply and METAL USER MANUAL 21 Figure 9 Setting resolution and ange Resonate ESD Settings f h t dust setings wthpreew Def refresn rate Manage 30 settings You can adjust the amount of information appearing on the screen an
10. bject product_quadro_fx_5800_us html 2 See also http www nvidia com object product_quadroplex_2200_d2_ us html Figure 8 METaL s two NVIDIA Quadro Plex 2200 D2 systems mounted in the rack 13 See also http www nvidia com page quadrofx_gsync html 20 ISU VRAC HCI IF YOU DON T WORK FOR VRAC IT this isn t the section you want to be reading the configuration of the Windows graphics driver on the render node is quite fragile and easily goofed up What seems like an innocuous change like updating a driver or changing the order of the displays can require a complete reset and repair of the configuration So unless you are on the receiving end of help vrac help tickets please skip this section Windows Setting up the Windows driver is somewhat complicated and typ ically any changes require the whole process below to be followed again Also note that each of the steps can cause re configuration to happen that might cause the mouse cursor to lag substantially It s best to wait until the system has finished applying these changes and is working smoothly again before proceeding to the next step Also sometimes you can get by with an abbreviated version of this protocol skipping steps 1 4 and 5 and even 8 1 In Windows Display Properties under Settings make sure that the displays are ordered 1 3 4 even though that doesn t reflect how they are physically laid out on the desk and that 1 is set as the m
11. ccessible via the internal net work at 192 168 1 22 Figure 3 ARTtrack Con troller TP a k a Tracking Com puter 2http ww ar tracking com products software dtrack2 16 ISU VRAC HCI The TCP IP protocol used to interact with the controller is avail able and best documented through the DTrack SDK included with recent DTrack software versions Tracking targets We use the term target to refer to a rigid configuration of mul tiple retro reflective spheres that is used to provide a single posi tion orientation tracked point When we remember to we call A description of all standard targets available from ART can be found i at http www ar tracking com which have fairly dedicated uses and two of which are more versa products markers targets targets tile passive the retro reflective spheres markers We have four targets two of Note that the tracking markers are very sensitive to dirt and skin oils this reduces their reflectivity and thus the reliability of the track ing Furthermore they cannot be cleaned effectively only replaced Do not touch them with your hands no matter how clean and avoid setting them directly on any surface There are metal stands on the desk and nearby for the Wii Remote that hold it up at an angle to keep the attached target from touching the table Stereo glasses target Although we aren t using StereoGraphics CrystalEyes shutter glasses w
12. d effects VRISE Comparison of head mounted display HMD desktop and pro jection display systems Displays 29 2 58 69 2008 Training Checklist These are the topics covered in the training session for METaL See the rest of the manual for actual information on these points In some cases the information is here only please help by fixing that e Walk around back and show the computer rack setup as well as the cabinet that holds the equipment Render and head nodes Tracking computer Restart them if necessary but usually the system is quite stable Please send in a help ticket and cc jmvance iastate edu if you have to do this e Explain how to reserve the system online required See Schedul ing e Physical access borrow a key from Judy Vance jmvance iastate edu e Keeping things clean Use the dust mop frequently to keep the floor clean being careful not to get grit between the edge of the floor and the screen If the dust mop gets dirty switch dust mop heads and bring the dirty one to Judy Vance In the event the floor becomes dirty from foot traffic it can be cleaned using common cleaning solutions and a Swiffer should be onsite Feel free to clean the floor whenever necessary WARNING The walls are much more difficult to clean and smudges are almost always permanent see the shoe mark on the bottom of the left wall If you notice dirt on one of the walls contact help vrac iastate edu for ass
13. d reduce flickering You can also choose the high definition HD Set SLI and Fhysk configuration E Display Run display optimization wizard ate usng an HDTV and set a countryspecifc sgnal fer your stardard defintion SD TV Adjust desktop color settings Adust desktop size and position Rotate display on FDC status Set up multiple dsplays Samsung Synenas ies ata dust video color settings adust video mage settings Es Werkstation setup SL Mosate mode View system topology Synchwanize displays Adustedge overlap Solor depth otes Ges 1080 1920 x 1069 Gocemmendadh 720p 1280 720 720 x575 for 3 Figure 10 Base Profile most us mag tins wth preview its important are the ones that start f You can change the global 3D settings and create overrides for specific programs The overrides willbe used automatically each 7 Set SLI and PhysX configuration time the specified programs are launched with Stereo E Display Run display optimization wizard Change resolution Adjust desktop color settings Adjust desktop size and position Rotate display View HDCP status Set up multiple displays EX Video Adjust video color settings Adjust video image settings El Workstation Set up SLI Mosaic mode View system topology Synchronize displays Adjust edge overlap Extension limit Force stereo shuttering Maximum pre rendered frames Mult dis
14. des both nodes with a high speed connection to other ISU and VRAC resources and the Internet Troubleshooting If issues are encountered that cannot be resolved using the instruc tions below please file a help ticket with VRAC IT by emailing help vrac iastate edu and cc ing jmvance iastate edu Tracking Issues Input Issues Graphics Issues Stereo Issues double image flickering awkward feeling or unrealistic stereo 1 First try a different pair of glasses or two If another pair works the batteries were probably dead see XPAN D X 101 Active Stereo Glasses 2 The next step is to reboot rebooting the render node is typically sufficient but there is no harm in following the full procedure 3 If this doesn t work you ll need to contact VRAC IT It can be helpful to include the results of TestPattern 8 ISU VRAC HCI Other graphics issues No stereo display not correctly immersive full wall etc 1 If you are using an application based on VR Juggler make sure that you are using an appropriate jconf file for the scenario you want There are both stereo and mono jconf files mono ones are primarily used for photos and video If your application is not based on VR Juggler e g Teamcenter Visualization Vizard verify that the application s settings are appropriately set 2 Make sure that the touchpanel shows all projectors on and not hidden 3 If your problem persists proceed with the Stereo Issues
15. dou ble image flickering awkward feeling or unrealistic stereo trou bleshooting steps Note that if TestPattern works the problem is likely in your application or configuration file Shared Procedures Where a troubleshooting procedure might apply to multiple scenar ios it has been separated out here to avoid duplication Shutting Down or Rebooting the System The single keyboard and mouse are connected only to the head node They control the render node through a software system Synergy Thus if the head node is not started up and fully functional you will not be able to control the render node Shutting down the system is not typically necessary Rebooting is occasionally done as a troubleshooting measure In either case the standard safe shutdown procedure should be followed one ma chine at a time starting with the render node then shutting down or rebooting the head node second A hard shutdown using the power button on the machines in the rack is to be avoided at all costs If the system freezes and there is no other way to shut it down this may be acceptable but an email should be promptly sent to VRAC IT with a description of what was happening when the system froze which machines had to be hard shutdown and the date and time of the issue TestPattern This is a simple display test of stereo imaging to help isolate prob lems Including the results of running TestPattern in a help t
16. droplex 2200 D2 1 of 2 SLI Mosaic Mode Fan level Power supply Temperature JJ G Sync client 1 of 2 Framelock 0 Framelock 1 External sync signal Framelock sync pulse Syne settings Firmware version Fm Quadro FX 5800 1 of 4 SLI Mode DVI DVI DisplayPort Total memory Core clock Memory clock Temperature Bus type Video BIOS version IRQ Hl Samsung SyncMaster 1 of 3 Display state Resolution refresh rate Timing EDID status Stereo sync Jam Quadro FX 5800 2 of 4 SLI Mode DVI ovr DisplayPort Total memory Core clock Memory clock Temperature Bus type Video BIOS version IRQ Bi vita Quadroplex 2200 D2 2 of 2 SLI Mosaic Mode Fan level Power supply Temperature J G Sync server 2 of 2 Framelock 0 Framelock 1 External sync signal Framelock sync pulse Syne settings Firmware version JE Quadro FX 5800 3 of 4 SLI Mode DVI DVI DisplayPort Total memory Core clock Memory clack Temperature Bus type Video BIOS version IRQ samsung SyncMaster 2 of 3 Serv Display state Resolution refresh rate Timing EDID status JB Quadro FX 5800 4 of 4 SLI Mode DVI DVI DisplayPort Total memory Core clock Memory clock Temperature Bus type Video BIOS version IRQ Samsung SyncMaster 3 of 3 Display state Resolution refresh rate Timing EDID status Stereo sync 6000 COCO 0006 oo ee 66060 oooo dg 00 0
17. e are using what ART calls the CrystalEyes target on our stereo glasses See figure 4 Wand target a k a tree target Figure 4 Glasses target The base of the tree target contains a threaded hole We have put a threaded post on the end of a Nintendo Wii Remote and screwed the tree target on to serve as our wand in the space The Wii Remote is used for buttons only not using accelerometer or IR data they d be redundant with the tracking information we get from the DTrack system while it is accurately tracked by the optical tracker See figure 5 Claw target a k a hand target This is a large versatile target intended for tracking a hand In this usage it works best on the back of your hand with the long axis on the thumb side and the elastic around your hand and over the web between thumb and index finger It can also be used to attach Figure 5 Tree target on Wii to anything else you might want to track See figure 6 It is presently Remote mounted on the Haption Virtuose haptic device please ask before removing it Don t confuse this with its baby sibling the wrist target Figure 6 Claw hand target METAL USER MANUAL 17 Wrist target ART calls this smaller version of the claw target a hand target but unless you re tracking very small hands or zombies who walk around with the backs of their hands facing up it doesn t work too well for this purpose It s more wrist sized in my opi
18. e diagram in the cabinet drawer for how to place the Wii Remote on the charger 7 Log off of both computers Switching from Windows to Linux Switching from Linux to Windows Close all applications then double click the Close everything then in a Terminal run Reboot to Linux icon ssh pxe Both computers will immediately restart Both computers will immediately restart
19. ging sta tion will turn red indicating that it is charging the batteries Don t leave the glasses out because they are always on as long as they are in range of an emitter e In case of problems send in a help ticket to help vrac iastate edu and cc jmvance iastate edu Quick Start Guide Windows METaL MULTIMODAL EXPERIENCE TESTBED AND LABORATORY Quickstart Guide Windows 1 Log in to both machines 2 Turn on projectors using the AMX touchpanel 3 Start DTrack2 on head node DTrack2 v2 5 0 November 16 2010 Copyright C 2007 2010 A R T GmbH EA x ue tracking GMD Virack DELCCNgS DTrack2 LOs ts Ger E Monitor 2DOF ARTtrack Controller atc 00198 Z O O N connect other Controller _ Ext the controller is located at 192 168 1 22 4 Connect the Wii Remote Device server will auto connect O ___ The Wii Remote is ready to use when the correct light is lit 1 for the white controller 2 for the black controller and press 1 and 2 on Wii Remote the controller rumbles briefly all four lights will flash 5 Run your app The desktop of the render node has folders of shortcuts including the VR JuggLua interactive interface NavTestbed 6 When done shut down in reverse order and put accessories away in the filing cabinet Turn off the Wii Remote s by pressing and holding the power button on the controller until the light turns off Also please see th
20. icket when indicated can save time for VRAC IT On the render node go to Start All Programs Mechdyne Cavelibs Utilities testpattern This should show among other things a bar that says left eye and a bar that says right eye on each of the walls If the eyes are switched or if you can see both messages in either eye this would be an error condition worth noting Be sure to check each wall including the floor METAL USER MANUAL 9 In Case Of Virtual reality induced symptoms and effects VRISE is also known as simulator sickness or cybersickness a sort of motion sickness that sometimes happens in VR environments It happens less often Sue V G Cobb Sarah Nichols Amanda Ramsey and John R Wilson y i j f Virtual reality induced symptoms and 2 but is still possible From anecdotal experience high speed flying effects VRISE Presence Teleoperators amp around in erratic patterns seems to be a trigger Virtual Environments 8 2 169 186 1999 Sarah Sharples Sue V G Cobb Amanda Moody and John R Wilson Mild moderate VRISE simulator sickness Virtual reality induced symptoms and effects VRISE Comparison of head mounted display HMD desktop and projection display systems Displays 29 2 58 69 2008 in CAVE environments like METaL than in head mounted displays e Stop and have the person sit down to assess how they are feeling e Wint O Green Lifesavers are in
21. istance e Hardware details see Tech Specs Tracking 36 ISU VRAC HCI Don t touch the reflective ART tracking balls markers Touching them degrades the reflective performance over time When the tracking cameras show two red LEDs the system is on Remember to turn off the ART tracker when you are finished This can be done using the DTrack2 software Projectors Don t leave the projectors on when not needed but don t go overboard turning them on and off Frequently switching them on and off is bad for the life of the bulb If you are leaving the room and will be gone for more than 1 hour turn the system off Otherwise it s OK to leave it on Floor is similar to a kitchen countertop so shoes are OK unlike the C6 Wipe them off on the rugs though If you d rather just wear socks that s fine too Be extremely careful of the screens they are thin flexible and can easily be punctured Black metal stands on the desk are for the Wii Remote to protect the tracking markers Virtuose While operating the Virtuose haptic device if it begins to shake let go of the handle rather than grasping it harder The device has a deadman switch that de activates when you let go and turns off applied forces Be mindful of the long cord when moving the Virtuose around Pick up the device with the arm over your shoul der don t skid it Nexus Robot If using the battery pack
22. nion hence its de facto name in METaL It has been attached to a dataglove with the elastic around a ribbon cable a gamepad a custom T shaped in teraction device etc it can be moved around as desired See figure 7 seen o Figure 7 Wrist target on 5DT data glove Graphics Four of the five graphics cards in the system are connected to the render node Components NVIDIA Quadro FX 5800 Professional class graphics card from NVIDIA using a variant of the GT200GL chipset with 4GB of RAM and support for OpenGL quad buffered stereo One is installed in the head node in METaL NVIDIA Quadro Plex 2200 D2 An external Visual Computing System that hosts two NVIDIA Quadro FX 5800 cards and an NVIDIA G Sync II card card A ca ble connects this device to the DuHIC in the host system METaL s render node They are pre configured as a closed component open ing the case voids the warranty METaL has two of these mounted together in the server rack see figure 8 DuHIC This stands for Dual Host Interface Controller the PCI Express x16 card in a host computer that connects it to two NVIDIA Quadro Plex 2200 D2 systems Installed in the render node in METaL NVIDIA G Sync II card An card that internally connects with two Quadro graphics cards and externally with other G Sync cards to provide framelocked rendering and synchronized stereo Configuration See also http www nvidia com o
23. play miced GPU acceleration OpenGL rendering GPU Stereo Display mode Stereo Enable Stereo Swap eyes Threaded optimization Triple buffering Vertical sync Description Allows you to enable or disable triple buffering Typical usage scenarios Multiple display performance mode Auto select On board DIN connector On On Auto off Force on 22 ISU VRAC HCI prepare to wait this is the longest step typically in close competi tion with the disabling of synchronization 1 The timing server is On another system Onthis system EH lt o Server Settings Samsung SyncMa Samsung SyncMa of 3 Lota Samsung SyncMa Bora 2 Select displays to lock to the server Active_ Display Refresh Rate Resolution Additional Information Samsung Syno 60 000 Hz Samsung Sync 60 000 Hz 1600 1200 1600 x 1200 Description Selecting a checkbox synchronizes the display with the timing server A display cannot 7 Now finally we can check our work On the Workstation System Topology page verify that the settings look approximately like those shown in figure 12 8 For safety reboot and check the topology again You probably also want to run TestPattern to check that stereo and sync are actually working Figure 11 The correct ap pearance of the Synchronize Displays page jam Host Host Interface Card JE nv1ora Qua
24. s can be found on the VRAC intranet wiki On the wiki clicking Facilities on the left then METaL will show you a page that includes information on how to make reservations The direct link to this page is https intranet vrac iastate edu twiki bin view TheLab FacilityMETaL Note If your reservation is likely to disrupt other people in the 1121 Black lab area lights off for extended periods of time demo to a group notify heindel grad iastate edu at least 24 hours in advance in addition to reserving the space on the VRAC calendar Viewing Reservations The display board in METaL regularly shows the current week s 16 which has been a bit cantankerous reservation calendar directly from this system The page it shows lately which you can also access is this one https calendar vrac iastate edu home metal calendar vrac iastate edu Calendar html The registration calendar is available as an iCal webcal feed If you d like to add it to your Google Calendar iCal or Outlook or other iCal capable tool add this URL https calendar vrac iastate edu home metal calendar vrac iastate edu Calendar ics Bibliography 1 Sue V G Cobb Sarah Nichols Amanda Ramsey and John R Wilson Virtual reality induced symptoms and effects VRISE Presence Teleoperators amp Virtual Environments 8 2 169 186 1999 2 Sarah Sharples Sue V G Cobb Amanda Moody and John R Wilson Virtual reality induced symptoms an
25. s using the DTrack proto col to UDP port 5000 on both the head and render nodes ART TrackPack4 An infrared optical tracking system by Advanced Realtime Tracking to provide position and orientation tracking of one or more targets in the physical volume It consists of four cameras mounted around the top of the volume an ARTtrack Controller TP computer and a number of tracking targets The tracking cameras have one red LED lit when they are inactive and two red LEDs lit when they are active ARTtrack Controller TP This is the official name of the appliance style computer supplied with the ART TrackPack4 that controls the cameras processes input into tracking data and synchronizes the infrared flashes with the stereo emitters Located near the top of the server rack in METaL see figure 3 DTrack2 The software used to control the ARTtrack Controller TP typically just to start and stop tracking More functionality is available but it is not needed for use with the four existing tracking targets The DTrack2 software version 2 7 2 is installed on both the head and render node in Windows and Linux but is typically only used on the head node Tracking data is sent to both nodes regardless of where DTrack2 is run 6 See also http www ar tracking com products tracking systems trackpack system trackpack 7 http ww ar tracking com products tracking systems trackpack system trackpack controller Only a
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