Graphics Reference
In-Depth Information
Figure 15.11.
A JitterCloud display in orthographic (left) and perspective (right) pro-
jection.
are reinterpolated to those new points. To support this approach,
glman
has
another GLIB file geometry option:
JitterCloud 50 50 50
In
glman
, a jiter cloud has its points (and thus its
texture stp
coor-
dinates) perturbed. Results from using a
JitterCloud
in orthographic and
perspective are shown in Figure 15.11. These are exactly the same as those in
Figure 15.10, except for the jitercloud change. Note that the data values at the
perturbed points are correct because they are looked up in the data texture
based on their coordinates.
Another useful technique is to use the fragment shader's knowledge of
the data values it is seeing to alter the appearance of the dots by changing
Figure 15.12.
Changing a point's size to emphasize its scalar value.
