Where is there a description of the ProjectionControl matrix?
And if someone already knows the answer to this particular
question, please let me know.
What values are used in the ProjectionControl matrix
to switch a 3D display to a view from on top, and from south, north,
east, and west?
Alternately, what values are used in:
/** create a projection matrix appropriate for this graphics API
from x, Y and Z rotation angles, from a scale factor, and from
X, Y and Z translation amounts;
these creates the matrix format used by the getMatrix and
setMatrix methods of ProjectionControl */
public double[] make_matrix(double rotx, double roty, double rotz,
double scale, double transx,
double transy, double transz);
to create these points of view?
Are any of these angles (rotx etc.) equivalent to azimuth (view from an angle
measured
from north 0 to 360) and elevation (something like 90 = from overhead
and 0 = from side)?
Stu Wier
--
Stuart Wier UCAR Unidata Program
wier@xxxxxxxxxxxxxxxx P.O. Box 3000
http://www.unidata.ucar.edu/staff/wier Boulder, CO 80307
