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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | #!F-adobe-helvetica-medium-r-normal--18*
#!N
#!CSeaGreen #!N #!Rall189 Rendering #!N #!EC #!N #!N The process of
#!F-adobe-times-medium-i-normal--18* rendering #!EF an image involves a computer calculation of the
amount of light falling on each visible surface of the objects
in the "scene," as seen from the point of view of
the computer "camera" (the viewer's eye point). During the rendering process,
surface properties of objects are taken into account as are the
colors of both the objects and the "lights" shining on them.
In other words, a computer graphics renderer samples the scene in
front of the camera at the resolution of the computer monitor
on which the scene is to be displayed. Its sample space
is the 3-dimensional "world" containing the objects. But the image renderer
does not create a 3-dimensional picture; it only calculates the colors
of the dots that can be seen on the 2-dimensional monitor
screen from the chosen point of view. Any parts of objects
that cannot be seen from that point of view are neither
sampled nor rendered, nor are they stored in the image file
or displayed on the monitor. This 2-dimensional image may appear 3-dimensional
to our eyes because of shading, occlusion of distant objects by
closer ones, and other visual cues that, in the real world,
indicate dimensionality. Like any image, it is a representation, however real
it may appear. #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N
#!N #!Lall190,dxall191 h Positions and Connections Dependence #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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