ELSA GLADIAC 511, Руководство пользователя

Страница: 42 / 46

Glossary
|
| ELSA GLADIAC 5II |
42
EN
dual 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 transferred
only once. These processes can reduce the
data volume by approximately a third.
쎲
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).
쎲
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 .
쎲
Texel – Individual pixel of a
➟
Texture .
쎲
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.
쎲
Transformation & Lighting (T&L) – Us-
ing T&L, the main computer processor is
freed up from the consuming task of
computing geometric calculations. This
com-putational process, which includes all
of the coordinates of a 3D object during ro-
tation, shifting, scaling and color, is taken
over by the graphics board processor.
쎲
Trilinear filtering – This is a mixture of
➟
MIP mapping and
➟
Bilinear filtering .
쎲
TrueColor – A graphic display mode
with max. 16.7 million colors, i.e. a color
depth of 24 or 32 bits per pixel.
쎲
VESA – Abbreviation for Video Electron-
ics Standards Association. A consortium
for standardizing computer graphics.
쎲
Viewing pyramid – Designation for the
part of a 3D space located within the view-
er's field of vision.
쎲
VRAM – Abbreviation for Video RAM.
VRAM is a fast dual-ported memory espe-
cially for graphics baords. It can simulta-
neously redraw the screen, while text and
images are drawn in the memory. This
makes it faster than single ported RAM
(DRAM).
쎲
Z biasing –
➟
Direct3D method for the
correct display of various objects with the
same depth coordinates. A typical exam-
ple 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.
Under
➟
OpenGL API , this functionality is
called PolygonOffset.