| octrees in computer graphics

On February 9, 2008, the Academy of Motion Picture Arts and Sciences will accord its ten Accurate and Abstruse Academy Awards for the year. One of them will go to a assistant of computer science at Stanford University who formed with scientists from Industrial Light & Magic. They’ll accept this ‘Oscar’ for their assignment about cyber-fluids. They’ve started to assignment several years ago for the development of the changeable aqueous terminator in Terminator 3. This technology additionally was acclimated to archetypal the biconcave address in Poseidon and in the two latest Pirates of the Caribbean movies. But apprehend more…

Slides | octrees in computer graphics
Slides | octrees in computer graphics | octrees in computer graphics

You can see aloft several computer-generated scenes assuming off the aqueous simulation technology which will accept a accurate Academy Accolade this anniversary at The Beverly Wilshire. (Credit: Ron Fedkiw and his team, Stanford University) But don’t absence this abbreviate cine (16 seconds) assuming the after-effects aggravating to access the alarm apparent above.

This analysis has been led by Ron Fedkiw, Associate Assistant of Computer Science, and Stanford advisers Jerry Talton and Nipun Kwatra. But Fedkiw, who has additionally formed for Industrial Light & Magic (ILM) before, collaborated on this activity with ILM scientists Nick Rasmussen and Frank Losasso Petterson, who will allotment the accolade with him.

Course Website: Computer Graphics 11: 3D Object Representations ..
Course Website: Computer Graphics 11: 3D Object Representations .. | octrees in computer graphics

But why these scientists accept been accustomed by the Academy of Motion Picture Arts and Sciences? Let’s apprehend the Stanford Report. “Computer cartoon experts about accept acclimated particles and circuitous blobs to represent water, but these can accord acceleration to unrealistically chapped or chapped surfaces. Alternatively, they accept acclimated a address alleged ‘the akin set method’ that gives a bland apparent representation, but some baptize is ‘under-resolved’ and artlessly disappears back it break bottomward into baby volumes, as in a abolition wave.”

So what are the new techniques developed by Fedkiw and his adolescent researchers? “The key addition abaft Fedkiw and aloft doctoral apprentice Douglas Enright’s atypical ‘particle akin set method’ was to mix the use of particles and akin sets so that studios could advance bland surfaces wherever accessible and still accumulate all the aqueous via the atom representation. ‘As an added bonus, the adjustment automatically generates aerosol particles and bubbles in under-resolved regions area the akin set [method] loses accumulation and volume,’ Fedkiw said. “

For added information, this analysis assignment will be appear in a approaching affair of IEEE Transactions on Visualization & Computer Cartoon beneath the name “Two-way Accompanying SPH and Atom Akin Set Aqueous Simulation.” Actuality is the alpha of the abstract. “Grid-based methods accept adversity absolute appearance on or beneath the calibration of the basal grid. Although adaptive methods (e.g. RLE, octrees) can allay this to some degree, abstracted techniques are still appropriate for assuming small-scale phenomena such as aerosol and foam, abnormally back these added broadcast abstracts about behave absolutely abnormally than their denser counterparts.”

Octree - Wikipedia | octrees in computer graphics
Octree – Wikipedia | octrees in computer graphics | octrees in computer graphics

And actuality is a description of the access of the researchers. “In this paper, we adduce a two-way accompanying simulation framework that uses the atom akin set adjustment to calmly archetypal close aqueous volumes and a smoothed atom hydrodynamics (SPH) adjustment to simulate broadcast regions such as sprays. Our atypical SPH adjustment allows us to simulate both close and broadcast baptize volumes, absolutely incorporates the particles that are automatically generated by the atom akin set adjustment in under-resolved regions, and allows for two way bond amid close SPH volumes and grid-based aqueous representations.”

If you appetite to apprentice added about this adjustment to actualize computer-generated graphics, actuality is a articulation to the abounding cardboard as it has been submitted to IEEE TVCG (PDF format, 7 pages, 12.0 MB). The aloft analogy has been extracted from this document.

Finally, added projects accustomed an Academy Award. Actuality is a articulation to the 10 accurate and abstruse winners of the Accurate and Engineering Awards accustomed by the Academy of Motion Picture Arts and Sciences.

Course Website: Computer Graphics 11: 3D Object Representations ..
Course Website: Computer Graphics 11: 3D Object Representations .. | octrees in computer graphics

Sources: David Orenstein, Stanford Report, January 16, 2008; and assorted websites

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Octree - Wikipedia | octrees in computer graphics
Octree – Wikipedia | octrees in computer graphics | octrees in computer graphics

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Visual surface detection i | octrees in computer graphics
Visual surface detection i | octrees in computer graphics | octrees in computer graphics

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Computing | octrees in computer graphics | octrees in computer graphics

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