Download User Manual Vol. 3 Rendering

Glossary
Resolution
The number of pixels in the horizontal and vertical dimensions
of a display.
Scan-line rendering
Rendering which employs a scan-line algorithm. Scan-line
algorithms operate by scanning each row of pixels in sequence
to determine the visible surface and pixel value. Scan-line
rendering can produce images more efficiently than ray tracing
methods.
Shader
A shader or shader function can loosely be defined as a generic
C-code function that calculates some aspect of the rendering
environment such as a pixel’s background color or the effect of
a surface’s transparency on the color of a pixel. Each shader has
the notion of a named list of arguments or parameters.
Shaders are categorized into several different shader Classes.
Shadow
That part of an object or region of space not directly illuminated
by a particular light source. The shaded rendering methods, flat,
gouraud and phong do not support shadows.
Shadow map
A depth-buffered image computed from the view point of a light
source to support the rendering of shadows on object surfaces.
Shadow maps can be computed once by an application and
reused for any set of viewing parameters until the position of a
light or an object’s geometry changes. As for other rendered
images, shadow maps can be computed to an application
specified image resolution.
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