ELSA Synergy 2000, Руководство пользователя

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Glossary
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| ELSA Synergy 2000 |
48
EN
ual triangle, the vertices are transferred
only once. A fan object is used when sev-
eral triangles converge to a single point.
In this case, the vertices are also trans-
ferred only once. These processes can re-
duce the data volume by approximately a
third.
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Tearing – If there is no synchronization
with the monitor when switching between
images (pages) in
➟
Double buffer mode,
areas of the images can become offset. To
resolve this, the switching between pages
is synchronized with the monitor frequen-
cy (Wait on Vertical Blank).
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Tesselation – Tessellation subdivides
objects into polygons (e.g. triangles) for 3D
rendering. For these primitives, the corner
point and color values as well as the trans-
parency value if necessary are deter-
mined. Tessellation is currently performed
by the application, i.e. upstream of the
➟
3D pipeline .
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Texel – Individual pixel of a
➟
Texture .
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Texture – The overlaying of a surface
with a texture with correction for perspec-
tive, such as a wood grain or the drawing
of a wall with wallpaper in a perspective
view. Videos, too, can be used as a tex-
ture.
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Transformation & Lighting (T&L) – Us-
ing T&L, the main computer processor is
freed up from the consuming task of com-
puting geometric calculations. This com-
putational process, which includes all of
the coordinates of a 3D object during rota-
tion, shifting, scaling and color, is taken
over by the graphics board processor.
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Trilinear filtering – This is a mixture of
➟
MIP mapping and
➟
Bilinear filtering .
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TrueColor – A graphic display mode
with max. 16.7 million colors, i.e. a color
depth of 24 or 32 bits per pixel.
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VESA – Abbreviation for Video Electron-
ics Standards Association. A consortium
for standardizing computer graphics.
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Viewing pyramid – Designation for the
part of a 3D space located within the view-
er's field of vision.
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VRAM – Abbreviation for Video RAM. A
module for upgrading the memory on a
graphics board to display higher resolu-
tions and color depths.
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Z biasing –
➟
DDR SDRAM method for
the correct display of various objects with
the same depth coordinates. A typical ex-
ample is the display of a shadow on a wall:
both objects have the same Z (depth) coor-
dinates, but the shadow must appear on
the wall (not vice versa). The included Z
bias value ensures the correct display. Un-
der
➟
OpenGL , this functionality is called
PolygonOffset.
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Z buffer – The 3D depth information of a
pixel (the position in the 3rd dimension).