Tissue Scaffold VR

Professors Chris Williams (Mechanical Engineering, Engineering Education) and Tim Long (Chemistry) along with grad student Joseph Kubalak are interested in using the Cube to explore the deviation between 3D models and the 3D printed physical manifestations of those models.  So far, we have explored two models – a tissue scaffold (normally about thumbnail size) and a dental model.  These models were printed and then CT scanned.  The scans were converted into meshes, and analyzed for the difference between the scanned version of the physical object and the original 3D model.  That analysis was applied to to the models as color.  At that point, they sent me the scanned meshes (with vertex color) and I tossed them into Unity so we could explore them in the Cube with our tetherless VR setup.  Here are two quick videos showing what they’ve been looking at:

Map of Science

Over in the VT library, Michael Stamper was recently hired as the Data Visualization Designer & Consultant for the Arts.  It made sense for Michael and I start a dialogue and figure out how we can help build the collaborative work between the library and ICAT.  As a starting place, we decided to create a 3D VR visualization of the Map of Science (http://www.mapofscience.com/, http://sci.cns.iu.edu/ucsdmap/).

This is the first iteration – a direct translation of the ucsdmap data set into virtual space.

We have to figure out where we want to go from here, but it was an excellent first step!

Sports simulation

Although I haven’t posted in a while, a lot of projects are continuing to develop.  In fact, there are number of posts I will be making in the forthcoming week with some project updates and new projects.

For today, I just wanted to show some images of the sports field Lucas Freeman (Creative Technologies MFA student) modeled for us.  Although this isn’t an official project yet, I’ve been working with Robin Queen in BEAM and Todd Ogle in TLOS to start prototyping two sports simulations.  The first is a soccer simulation for VR, which Robin can use in her biomechanics lab to make users feel like they’re actually on the field, in a real soccer situation.  She can then capture data on how they react to investigate various sports injuries.  The second is a football simulator, designed for quarterback training.  They might be in the Cube or in Perform studio wearing a headset and seeing various game scenarios.  They then throw the ball (into a net!) based on that stimuli.  That’s the very basic outline of the ideas, and you’ll hopefully continue to see those take shape over the coming months.

We already have the functionality in place for these things, so the next step was to get some modeling done.  See the images below.  Next week, we will do some mocap to capture animation for the virtual players that will go into the simulation.  Cool stuff, great job Lucas!

 

Wintermester ICAT / University Honors course

This Wintermester, Tanner and I co-taught a Honors College course hosted in the ICAT Cube and Perform studios.  The goal was for students to learn the ins and outs of these facilities and their systems, and to create projects that combine at least two of the following: motion capture, virtual reality, immersive projection, spatial audio.  They got to be the first folks to make use of our VR backpacks, which was really fun to see.  It was definitely a trial by fire for all our systems, putting everything to the test, but I’m glad to say that it seems like we built things robustly enough that everything held together.

The class was intense, with 4 hours of class-time per day, 5 days per week for two weeks.  The students were fantastic to work with.  They were very focused and eager, and I think they came away with a strong and novel experience.  Their final projects went way beyond our expectations, and we’re very proud of what they accomplished.  There 6 groups and 7 projects.

Haunted Halls

A virtual reality horror experience in the Oculus HMD with the VR backpack.  Walk through a haunted maze and be terrified by the spooky spatialized sounds and terrifying visualizations.

Wintermester 2017 – Haunted Halls Final Project
Wintermester 2017 – Haunted Halls Final Project

Crowning Achievement (a Pun)

Checkers in outerspace.  Using VR with the Oculus and backpack.  Multiplayer included.  Pick up checkers pieces with your hand and move them around the board.  Spatialized background music an added bonus.

Wintermester 2017 – Crowning Achievement Final Project
Wintermester 2017 – Crowning Achievement Final Project

PhoAsteroids

A game of asteroids, but with 360 immersive projection on the Cyclorama.  Hold a wand and point it at the screen to try to destroy the asteroids flying around.  The more you destroy, the faster they go.  Spatial audio tracks the asteroids as they fly around you, making a satisfying POP when you destroy an asteroid.

Wintermester 2017 – PhoAsteroids Final Project
Wintermester 2017 – PhoAsteroids Final Project

Michael Rhoades

An abstract fixed-media art composition, depicting a space of cylinders and mirrors.  Projected in stereoscopic on the Cyclorama, with spatial audio.  It’s quite an experience to see this metallic, glass world seem to come out of the screen in 3D.

Wintermester 2017 – Michael Rhoades Final Project
Wintermester 2017 – Michael Rhoades Final Project

Last Words

Where art, particles, typography, and 360 3D projection meet.  The depth of the stereoscopic projection they accomplished here was incredible, and it was really fun to see the first experiments in typography on the Cyclorama.  The spatial audio of music and sound clips to accompany the video was also very effective.

Wintermester 2017 – Last Words Final Project
Wintermester 2017 – Last Words Final Project

Peek A Boo

A short animation of a girl hiding in the Cube, peeking out from behind a curtain.  Sounds simple, maybe, until you find out that they accomplished this by using motion capture to record the animation, apply it to a prebuilt model, and then rendered in 360 3D for the Cyclorama.  With the spatial audio call and response with the girl, it puts you in the virtual space.

Wintermester 2017 – Peek A Boo Final Project
Wintermester 2017 – Peek A Boo Final Project

Lane Stadium

A recreation of what it’s like to enter Lane Stadium on gameday as a Hokie football player.  The spatial audio is the key component here; the students scraped together a series of audio clips they could find to reassemble the aural experience of coming down the tunnel and out onto the field, making great use of the sound system in the Cube.  Unfortunately, it doesn’t seem like VT sports has gotten into the 360 video area yet, so the students used a video from another university instead, which looked amazing on the Cyclorama.  This would be great material for them to take to VT Sports to try to pitch for the opportunity to take a real recording.

Wintermester 2017 – Lane Stadium Final Project
Wintermester 2017 – Lane Stadium Final Project

VR particle physics update

We’ve made a number of tweaks and user interface adjustments to this project, and it’s time to share them.

  • We now have sprites and colors for EVERY type of particle.  It makes it look so much more amazing.  Jesse toiled over this during Thanksgiving break.  Thanks Jesse!
  • The user interface is now diegetic, existing in the world of the virtual environment rather than as a heads-up display or thru a physical tablet.  Right now it just hangs out at a particular spot.  But when the user is in VR, being motion-captured in the Cube, they will be holding an Xbox controller which will also be tracked.  The virtual menu will take the position of the Xbox controller – so essentially users just need to look at their hands to look at the menu.  They then select whatever part of the menu they are looking at with a simple look-and-click interface.
  • We’ve also added the ability to select particles by looking at them and pressing a button.  When you select them, a display pops up over the particle, showing key info.  On that display, if you click the Save button, the info for that particle gets saved to a display up on the wall (which is still in the works).
  • The Model section now has a preset subsection, so you can save and load different configurations of the BelleII model being on and off, along with the relative transparency values.
  • There are also two “scoreboards” on the Cube walls now.  One shows the current simulation time, so you can glance at it from anywhere in the room.  The other allows the user to start and stop a timer with a press of a button on the Xbox controller.
  • At Leo’s request, we’re also now showing “dead” particle sprites.  Instead of a particle sprite disappearing after the data for the sprite has ended, a “shell” takes its place, showing where the particle was when it … passed away?  This has caused some new frame rate issues that I’m struggling with.  30k is a lot of individual sprites!  They’re not correctly batching right now, which is what I spent most of my day trying to figure out.  I learned a few things that increased the frame rate here and there, but it’s still not great yet.  It gets worse as the simulation goes on, because more and more sprites are added.

Additionally, the educational side of this project is really starting to kick into gear.  Instead of spending most of the meeting time talking about features for the simulation, we’re talking about lesson plan development, which is awesome!  That’s exactly where we want to be moving in to next semester.  We plan on piloting this thing with Society of Physics Students folks immediately following spring break!

VR upgrades in the Cube

While the blog has been quiet recently, ICAT is far from it.  I haven’t posted recently because I don’t have a new flashy video to show off yet, but we’ve made some excellent internal developments.

Foremost in my mind at the moment is our integration of the Oculus CV1 into the Cube motion capture system.  In the past, we’d used the DK2 as our go-to headset.  It was connected by HDMI and USB to a laptop that someone would have to carry around behind whomever had the headset on.  The DK2 itself was OK, but the resolution wasn’t fantastic.  There was also a decent amount of shakiness to the perspective coming from the mocap system.

Oh, how times have changed.  With the CV1, we can use the IMU’s rotational data for the VR perspective.  Not only does this eliminate the shakiness, but it’s super low-latency.  But in order to enable users to walk freely thru the Cube, we’re still using the position data from the motion capture system, and disregarding position data from the Oculus infrared sensor (it still has to be plugged in or the Oculus app throws a fit, but it doesn’t actually serve a purpose).  The combination of these two works *brilliantly*, resulting in by far the best VR experience we’ve ever had in the Cube.

But wait, there’s more.  Right now, we have this running off a laptop with a dedicated graphics card, which is a problem.  The laptop’s battery can’t supply enough juice to the GPU, so when the laptop is unplugged it automatically lowers the GPU’s memory clock which dramatically hurts VR performance.  Enter the MSI VR One laptop/backpack/jetpack(!)(??)/new-kind-of-computer-form-factor-that-doesn’t-really-have-a-name-yet.  This thing is designed for tetherless VR.  You put it on like a backpack, you hook all the VR stuff up to it, tie up all the cords, and you’re free to walk around the room with nary a concern of tripping on cords or having someone else hold the laptop (new meme idea: Hold My Laptop… while I do some VR).  Caveat: we haven’t actually tried this thing yet.  It JUST released, and we have one on the way.  So, it’s possible that it won’t live up to expectations, but I’m hopeful.  If this works, we will get several more, and have true, tetherless, social VR in the Cube for the first time ever.

P.S. I’m still doing a lot of work on the physics VR simulation, and it’s looking great.  I’ve built a diegetic interface.  Once we get this backpack, I’ll take some video of a user exploring the simulation, using the interface, and post that here.

Subatomic particle physics update

This project just keeps getting cooler every week.

Come see it in person on the Cyclorama in the Cube, *this Saturday!*

Virginia Tech Science Festival, October 8, 2016, 10am-3pm.

Since the last update, we have:

  • Made a few new events (datasets that represent a particle collision)
  • Made sprites for each of the particles present in those events
  • Colored in the pathlines and trails for the particles to be the same as the color of those sprites
  • Optimized, optimized, optimized!  Runs at 60FPS!
    • I dumbed down the mesh to only be about 100 objects instead of many many thousand.  We get some depth sorting issues with transparency still in certain situations, but it’s way better than it was originally and there are no frame rate issues when doing it like this.
    • I cleaned up the particle controller code to eliminate generic lists, remove unnecessary GetComponent calls, and do better OOP.  That was a dramatic FPS improvement
    • The purchase order for the FastLineRenderer package from the Unity Store finally went through, and so now I’m rendering the 200k+ lines of the paths with that.  When I do that, the lines are made into a mesh, which is the a single super fast draw call.  That was also a dramatic FPS improvement.
    • Probably some other stuff too I’ve forgotten about…
  • Also!  Tanner is working on the sound element now, and is getting the basic framework in place.  It’s super exciting hearing that come together.

Perform Studio

The Perform Studio has undergone exciting changes over the summer and into this fall semester.

First, Tanner overhauled the booth.  Instead of just being a closet crammed full with a giant rack for the patch bays, he wall-mounted them to make enough room for it to be used as an actual mixing booth.  Yay!

Perform Studio booth

Second, the OptiTrack Motive:Body software was updated from 1.6 to 1.9, with excellent new features that improve nearly every aspect of the software.  Additionally, we’ve ordered some extra capture-suit accessories.

Third, the Perform Studio is now being used as the CHCI lab.  Doug Bowman and his cohort of graduate students can use the space to run experiments in virtual reality, using the motion capture system present.  We’re very excited to have them doing their research in ICAT’s facilities.  If you’d like to use the space, though fear not!  You can still reserve it with 72 hours notice, and it will be cleared out and ready.  If you would like to reserve the space, please contact Run Yu, who is handling the reservations for Perform Studio this year.  runyu at vt dot edu

Doug Bowman's 3D Interfaces grad students in the Perform Studio, 9/26/2016
Doug Bowman’s 3D Interfaces grad students in the Perform Studio, 9/26/2016