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AGP-7400 Graphics Card Users Manual
Perspective Correction
- correctly adjusting the interpolation of poly-
gon attributes (primarily texture addresses) so that they appear to
obey the rules of perspective. Perspectively correct interpolation is not
linear in screen space, and requires a divide by depth in order to look
right.
Precise Pixel Interpolation (PPI)
- PPI contributes to the
HyperPipelined 3D quality with Intels unique texture engine that deliv-
ers precise accuracy in interpolation operations of pixel values and
color values. This detailed pixel processing maintains a high level of
image quality in every scene.
Shading, Flat
- darkening or lightening the intensity of a polygon
based on the angle between its normal and a vector pointing to a
light source. All pixels on a polygon receive the same adjustment,
resulting in a faceted appearance. The per polygon and per pixel cal-
culation load is very light.
Shading, Gouraud
- darkening or lighting each pixel of a polygon
based on an interpolation between values calculated at the polygon's
vertices. A "vertex normal" is prescribed or inferred, and the intensity
at that vertex is determined by the angle between that normal and a
vector pointing to a light source. Each pixel is interpolated separately,
producing a simulation of a curved surface. Gouraud shading makes
objects appear to have a matte finish, with no specular components.
The per polygon and per pixel calculation load is moderate.
Z Buffer
- a buffer memory that holds the Z (depth) information per
pixel. The Z axis is perpendicular to the X and Y axis of the screen,
and in most practical cases inverse range is uded due to the fact that
it is linear in screen space (where range is not). Compares in depth
between pixels of two polygons can be used to determine occulting
relationships, and only draw the nearer polygon for each pixel.
Summary of Contents for AGP-7400
Page 1: ...AGP 7400 Rev A Graphics Card User s Manual 35600813 ...
Page 4: ...1 4 AGP 7400 Graphics Card User s Manual 1 Introduction CHAPTER ...
Page 9: ...2 Hardware Installation CHAPTER ...
Page 14: ...3 14 AGP 7400 Graphics Card User s Manual 3 Supported Softwares CHAPTER ...
Page 17: ...A Connector Pin Assignments APPENDIX ...
Page 20: ...B 20 AGP 7400 Graphics Card User s Manual B Glossary of 3D Features CHAPTER ...