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GLINT-GAMMA Schematic ( PDF Datasheet ) - 3D Labs

Teilenummer GLINT-GAMMA
Beschreibung 3D Geometry and Lighting Processor
Hersteller 3D Labs
Logo 3D Labs Logo 




Gesamt 24 Seiten
GLINT-GAMMA Datasheet, Funktion
GLINT Gamma
A 3D Geometry and Lighting
Processor for the PC
Neil Trevett
Vice President, Marketing
NASDAQ:TDDDF
www.3dlabs .com






GLINT-GAMMA Datasheet, Funktion
Transform Processing
Positioning objects in a scene
x1,y1,z1
3D Polygon
x3,y3,z3
Eye-point
x2,y2,z2
Input = the vertices of all objects in the scene in a database
Output = list of visible vertices, correctly positioned
Transform for eye-point - 4x4 Matrix Multiplications
- Allows positioning with six degrees of freedom
Lots of floating point operations!

6 Page









GLINT-GAMMA pdf, datenblatt
System Design Using GLINT Gamma
Hardware preprocessing for rasterization silicon
GLINT Gamma reads and processes polygon command stream
- Outputs command stream for a rasterizer processor e.g. GLINT MX
33MHz PCI is not fast enough for host connection
- Full 33MHz PCI bandwidth only supports 1.5 million polygons/sec
- AGP enables the full 3.3 million polygons/sec performance
- Need AGP’s sideband addressing for optimized vertex fetching
Use 66MHz PCI Connection to rasterizer
- Can guarantee 66MHz on-board operation, and allows multiple devices
PCI or AGP
CCPPUU
All polygons in the
scene. AGP 1X allows
3.3 million polygons/sec
66MHz PCI to
allow multiple
devices
GGLLIINNTT
GGaammmmaa
FFrraammeebbuuffffeerr
GGLLIINNTT
MMXX
Only visible polygons -
after clipping and
culling
Video out
All pixel processing,
e.g. texturing,
shading, Z buffering
performed in
rasterizer silicon

12 Page





SeitenGesamt 24 Seiten
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