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GLINT-GAMMA

3D Labs

3D Geometry and Lighting Processor

GLINT-GAMMA
GLINT-GAMMA

PDF File GLINT-GAMMA PDF File

Description
DataSheet4U.
com 1 (c) Copyright 3Dlabs 1997 DataSheet 4 U .
com www.
DataSheet4U.
com A 3D Geometry and Lighting Processor for the PC Neil Trevett Vice President, Marketing NASDAQ:TDDDF www .
3dlabs .
com DataShee GLINT Gamma DataSheet4U.
com et4U.
com DataSheet4U.
com 2 (c) Copyright 3Dlabs 1997 DataSheet 4 U .
com www.
DataSheet4U.
com Agenda • A backgrounder to the 3D geometry pipeline • System considerations for 3D geometry acceleration • GLINT Gamma architecture overview • GLINT Gamma detailed architecture • Board design examples using GLINT Gamma DataSheet4U.
com DataShee et4U.
com DataSheet4U.
com 3 (c) Copyright 3Dlabs 1997 DataSheet 4 U .
com www.
DataSheet4U.
com Geometry is the PC’s 3D Bottleneck The last difference between 3D workstations and PCs • The fastest CPU cannot keep today’s rasterization silicon saturated if running the geometry in software • Professional 3D is particularly demanding - Many small polygons used for precise modeling of surfaces - Viewperf uses polygons less than 1 pixel in size Application Application Complete geometry pipeline in software = 350K polygons/sec on a PII/266 100% of Rasterization in silicon - typically 500K-1M polygons per second Transforms Transforms Lighting Lighting Setup Setup DataSheet4U.
com CPU running application & geometry = 350K polygons/sec Transform and lighting in software = 1 million polygons/sec GLINT Delta offloads setup processing = 100MFlops Rasterization Rasterization DataShee et4U.
com DataSheet4U.
com 4 (c) Copyright 3Dlabs 1997 DataSheet 4 U .
com www.
DataSheet4U.
com What is a 3D Object? • Surfaces of objects are described as a grid of polygons • The vertices of the polygons are located in 3D coordinate space - x,y,z • The objects making up a scene are held in a database DataSheet4U.
com A 3D object e.
g.
a sphere Polygons describing the spheres surface x3,y3,z3 y z x2,y2,z2 x1,y1,z1 x DataShee et4U.
com DataSheet4U.
com 5 (c) Copyright 3Dlabs 1997 DataSheet 4 U .
com www.
DataSheet4U.
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