Download Algorithms for Parallel Polygon Rendering by Theoharis Theoharis PDF

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By Theoharis Theoharis

This publication is the results of the learn within the implementation of polygon-based photographs operations on sure normal goal parallel processors; the purpose is to supply a speed-up over sequential implementations of the pix operations involved, and the ensuing software program will be seen as a subset of the appliance suites of the appropriate parallel machines. A literature evaluate and a short description of the architectures thought of supply an advent into the sector. such a lot algorithms are continuously offered in an informally outlined extension of the Occam language along with unmarried guideline a number of facts flow (SIMD) information varieties and operations on them. unique equipment for polygon rendering - together with the operations of filling, hidden floor removing and soft shading - are provided for SIMD architectures just like the DAP and for a dual-paradigm (SIMD-MIMD) computer developed out of a DAP-like processor array and a transputer community. Polygon clipping algorithms for either transputer and the DAP are defined and contrasted. except the data awarded within the ebook and the helpful literature survey, the reader may also count on to achieve an perception into the programming of the proper parallel machines.

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Derivation of the C O V E t L M A S K [n] use From the planar integers Ri we derive the C O V E R . 2. INT (0))) on a Processor Array Evaluating each linear function F ~ for every pixel is computationally expensive; it requires 2 multiplications and 2 additions per pixel. e. h n pixels) since F i is F i at linear. , F~(z+(k+i)N,v) - P(z+kN, v) = (ai(z+(k+l)N) + biy+ ci) - (ai(z+kN) + biy + ei) aig. = where Fik,. = Fi(x+kN, y). ,k = Fi(z, y+ kN). 2. Incremental window calculations for N=2 36 For an n-sided polygon we need n planar integers Ri, n horizontal increments H i and n vertical increments Vi.

This is because the DisArray PE's do not possess the registers and logic necessary for the efficient implementation of some planar operations. 7. C o n c l u s i o n The SIMD and complementary. MIMD parallel architectures have application domains which are largely Their integration into a single system, like the Disputer, will therefore have an application domain which is larger than that of either machine on its own. The $IMD part of the Disputer is controlled by a transputer and can thus be regarded as one of the processes of the MIMD system.

The operations on controller can them. Of whose control registers are mapped thus declare variables of planar data course, the planar operations are executed by into the memory of the controller. 6. P l a n a r As Operations mentioned earlier, the Disputer is totally programmable in Occam but the transputer which controls the processor array has access to a special data type, the planar data type. We have planar created data a library of procedures these are called planar types; which handle the various operations on the operations and are described in this section.

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