GPU Pro 4: Advanced Rendering Techniques
Language: English
Pages: 382
ISBN: 1466567430
Format: PDF / Kindle (mobi) / ePub
GPU Pro4: Advanced Rendering Techniques presents ready-to-use ideas and procedures that can help solve many of your day-to-day graphics programming challenges. Focusing on interactive media and games, the book covers up-to-date methods for producing real-time graphics.
Section editors Wolfgang Engel, Christopher Oat, Carsten Dachsbacher, Michal Valient, Wessam Bahnassi, and Sebastien St-Laurent have once again assembled a high-quality collection of cutting-edge techniques for advanced graphics processing unit (GPU) programming. Divided into six sections, the book begins with discussions on the ability of GPUs to process and generate geometry in exciting ways. It next introduces new shading and global illumination techniques for the latest real-time rendering engines and explains how image space algorithms are becoming a key way to achieve a more realistic and higher quality final image. Moving on to the difficult task of rendering shadows, the book describes the state of the art in real-time shadow maps. It then covers game engine design, including quality, optimization, and high-level architecture. The final section explores approaches that go beyond the normal pixel and triangle scope of GPUs as well as techniques that take advantage of the parallelism of modern graphic processors in a variety of applications.
Useful to beginners and seasoned game and graphics programmers alike, this color book offers practical tips and techniques for creating real-time graphics. Example programs and source code are available for download on the book’s CRC Press web page. The directory structure of the online material closely follows the book structure by using the chapter numbers as the name of the subdirectory.
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Observation was that if the number of cache buckets is high enough, we can really severely limit the bucket size. As the reader can see in the source code, a bucket stores only a single uvec4 element, which corresponds to two shading samples: a cache entry is a tuple of an ssID and a memory address. This is a very important optimization, because instead of searching inside the cache, we can look up any shading sample with a single load operation using its hash value. In our first implementation,.
Simple. Figure 5.5 illustrates the rendering pipeline used in the AMD Leo demo. 5. Forward+: A Step Toward Film-Style Shading in Real Time (a) 127 (b) Figure 5.6. Illustration of 2.5D culling. (a) Frustum culling creates a long frustum for a tile with foreground and background. (b) 2.5D culling—splitting depth into eight cells—does not capture lights falling between foreground and background. 5.6 Extensions 5.6.1 2.5D Culling At the light-culling stage of Forward+, light geometries are.
R e d S H C o e f f s += coeffs * flux . r ; s u m G r e e n S H C o e f f s += coeffs * flux . g ; s u m B l u e S H C o e f f s += coeffs * flux . b ; } } // Write out g e n e r a t e d red , green , and blue SH - c o e f f i c i e n t s. o u t p u t R e d S H T e x t u r e[ e l e m e n t P o s] = s u m R e d S H C o e f f s; o u t p u t G r e e n S H T e x t u r e[ e l e m e n t P o s] = s u m G r e e n S H C o e f f s; o u t p u t B l u e S H T e x t u r e[ e l e m e n t P o s] = s u m B l u.
The form of three 2D texture arrays) is sampled with linear hardware filtering. Therefore we manually only have to perform a filtering in the third dimension so that we retrieve smooth results. With the help of the sampled SH-coefficients and the surface normal, we can perform an SH-lighting for each pixel. See Listing 7.4 for details. // pixel shader T e x t u r e 2 D A r r a y i n p u t R e d S H T e x t u r e: r e g i s t e r( t0 ); T e x t u r e 2 D A r r a y i n p u t G r e e n S H T e x t u r.