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Virtual Reality
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NASA Destination Tomorrow Segment explaining how NASA uses virtual reality environments to simulate NASA missions.
The great poet Walt Whitman once said, I accept reality and dare not question it.
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Well, if old Walt was here to see this, he just might question it.
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Today, NASA researchers are working in high-tech virtual reality simulation labs
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using numbers, graphics, mathematical models,
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to create three-dimensional images of objects and environments.
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Man, it's like working inside a real holodeck.
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Now, I spoke with Dr. Chris Sandridge at NASA Langley's Immersive Design and Simulation Lab,
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better known as the CAVE, to find out how it works.
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What we're standing in right now is called a CAVE.
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It stands for Cave Automatic Virtual Environment.
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Basically, it's a multi-screen theater where we can generate 3-D images, 3-D sounds,
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and simulate various NASA missions.
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The CAVE has three walls made of 10-foot by 10-foot rear projection screens
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and a floor that is projected from above,
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giving the users a near-complete immersion in computer-generated graphics.
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The simulation looks like double images until you put on the goggles
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that gives everything a three-dimensional quality.
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The hardware and graphics equipment used to operate the system
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were first developed for use in computer games and in the theme park industry.
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So, how does this virtual environment work?
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We need the glasses to describe that.
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Basically, what we have here are shutter glasses,
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and what they do is they kind of decode the stereo image so that we see the depth.
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Basically, the computer is generating two images,
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one for your left eye, one for your right eye,
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and then there's a little sensor here on the glasses
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that is detecting an infrared signal from behind the screen
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that synchronizes the glasses so you see a 3-D image.
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In addition, the person who's actually running the CAVE is also being head-tracked.
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There's a black box above us that is putting out an electromagnetic field
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that's being picked up by this antenna,
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and then that relays information back to the computer
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and tells the computer where the person is looking and what his head orientation is,
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and then it updates the visuals and it updates the sound based on this person's position.
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And then finally, because we don't have a mouse and a keyboard available to us,
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we need some type of an input device.
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So, what we have here is the wand that we use to control the application.
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It has joysticks on it. It has some buttons.
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And then also, it is tracked as well,
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so the computer knows where the position of this is so we can interact with the environment.
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So that's basically how it works.
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And then, of course, there's kind of a supercomputer in the back room that's kind of driving it all.
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So, can you show me how this application works?
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Sure. Put your glasses on and then we'll go to town.
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Got it, man. Test drive this thing.
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This is a full-up configuration of the station,
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and we're using this application basically for two different environments,
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the radiation environment and the sound environment.
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Currently, NASA Langley researchers are developing tools
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to help design improved radiation shielding and reduce noise for the International Space Station.
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They're able to move equipment or install shielding in the virtual reality image
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and then observe and store calculations of what effects the changes make.
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The simulations can be shared with other researchers at distant locations via computer network connections.
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So, Johnny, you want to try giving it a shot?
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Absolutely. Let me see this.
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Take the wand.
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Okay.
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You need to put it on these glasses because these are the ones that are tracked.
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All right. Thank you.
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And the way it works is that you point the wand in the direction you want to go
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and then push the joystick forward.
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Forward.
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To go forward.
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Oh, man.
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And you pull it backward to go backwards.
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And then rotating is pulling the joystick left and right.
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Check this out.
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You might want to back out so you can see, fly around the station.
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I'm going to throw up.
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All right. Here we go.
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Rookie driver.
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Yeah.
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Here, take the wheel.
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Here, your glasses back.
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Thanks.
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I'll take these.
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So what are some of the other uses for this technology?
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Another use that we're just starting to work on is to develop a simulation
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to evaluate community noise of jets and aircraft flying near airports
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to look at how we can quiet the aircraft
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and be less intrusive to the neighbors around the airport.
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And then finally, I guess, these types of cave environments are used
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by the automotive industry to lay out the interior cockpit of the car.
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So in a virtual environment, they'll look at, like, where the mirror is,
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where the console is, anything where human factors are involved,
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and you can put it in actual size and look at it in the correct perspective
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before you build hardware prototypes, which are fairly expensive.
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This was a lot of fun.
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This was really something else, and thanks a lot for everything.
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Yeah, no problem.
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One more question?
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Sure.
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Can I keep the glasses?
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Yeah, everybody wants the glasses.
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They are very exciting.
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Check these out, man.
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- Idioma/s:
- Niveles educativos:
- ▼ Mostrar / ocultar niveles
- Nivel Intermedio
- Autor/es:
- NASA LaRC Office of Education
- Subido por:
- EducaMadrid
- Licencia:
- Reconocimiento - No comercial - Sin obra derivada
- Visualizaciones:
- 422
- Fecha:
- 28 de mayo de 2007 - 17:04
- Visibilidad:
- Público
- Enlace Relacionado:
- NASAs center for distance learning
- Duración:
- 04′ 48″
- Relación de aspecto:
- 4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
- Resolución:
- 480x360 píxeles
- Tamaño:
- 27.91 MBytes
