By Eric Haines
The construction of ever extra life like three-D photos is relevant to the advance of special effects. The ray tracing method has develop into the most renowned and strong potential during which photo-realistic pictures can now be created. The simplicity, splendor and straightforwardness of implementation makes ray tracing a vital a part of realizing and exploiting state of the art desktop graphics.
An advent to Ray Tracing develops from basic ideas to complex purposes, supplying "how-to" techniques in addition to an in depth knowing of the clinical foundations of ray tracing. it's also richly illustrated with four-color and black-and-white plates. it is a publication to be able to be welcomed by means of all fascinated with sleek special effects, snapshot processing, and computer-aided design.
- Provides useful "how-to" information
- Contains prime quality colour plates of pictures created utilizing ray tracing techniques
- Progresses from a easy realizing to the complex technological know-how and alertness of ray tracing
Read or Download An Introduction to Ray Tracing (The Morgan Kaufmann Series in Computer Graphics) PDF
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Extra info for An Introduction to Ray Tracing (The Morgan Kaufmann Series in Computer Graphics)
ARTS: Accelerated Ray Tracing System. IEEE Comput. Graph. Appl. 6(4) , April 1 986 [EF] . 1 3 . Glassner, A . S . , Fast ray tracing by space subdivision. IEEE Comput. Graph. Appl. 4( 1 0), October 1 984 [EF] . 1 4 . Glassner, A . S . , Spacetime ray tracing for animation. IEEE Comput. Graph. Appl. 8(2), March 1 988 [EF, R T, AN] . 1 5 . Hall , R . A . and Greenberg D . P. , A testbed for realistic image synthesis. IEEE Comput. Graph. Appl. 3(8), November 1 983 [SH] . 1 6 . Hanrahan, P. , Ray tracing algebraic surface.
This fact gives a complete equivalence of the two algorithms. The algebraic solution originally did not have a number of useful features. Using insight into the geometry of the situation, a better algorithm was found. Looking back on the algebraic solution, the efficiencies inherent in the situation became clear. The point here is that studying the nature of the problem can yield algorithmic speed-ups. The algebraic solution was straightforward , but it was aimed at solving the general problem of fmding the intersection points of a line 46 Essential Ray Tracing Algorithms and a sphere .
Theoretically, t = 0 for these points, which are ignored by testing for this condition . However, in practice, calculational imprecision will creep in and throw these tests off. This imprecision will cause rays shot from the surface to hit the surface itself. Computationally what occurs is that t's are found which are very close to, but not necessarily equal to, zero. If uncorrected, those larger than zero will be considered valid intersections. The result is the nonsensical situation in which a small surface area is shadowed by itself.