Hi Don,
> We are having some problems with the latest release of
> visad.jar (Wed Aug 9 12:57:31 CDT 2000) on Linux. If
> we click in any VisAD display window, the program crashes
> with a sigseg violation. The specifics of our installation
> are:
>
> jdk1.2.2 from Blackdown
> java3d1_1_3
>
> If we use a previous visad.jar (Fri Jul 21 10:38:54 CDT 2000)
> we do not have this problem.
This is undoubtedly linked to the code that I added to
visad/MouseHelper.java for you recently, so that translating
the display with the mouse would be precise. Specifically,
the block of code:
VisADRay start_ray = behavior.findRay(start_x, start_y);
VisADRay start_ray_x = behavior.findRay(start_x + 100, start_y);
VisADRay start_ray_y = behavior.findRay(start_x, start_y + 100);
xmul = 0.01 * (start_ray_x.position[0] - start_ray.position[0]);
ymul = 0.01 * (start_ray_y.position[1] - start_ray.position[1]);
tstart = proj.getMatrix();
double[] rot = new double[3];
double[] scale = new double[1];
double[] trans = new double[3];
behavior.instance_unmake_matrix(rot, scale, trans, tstart);
xmul = xmul * scale[0];
ymul = ymul * scale[0];
added after:"
if (mousePressed1 || mouseCombo1) {
and after:
else if (mousePressed2 || mouseCombo2) {
is probably triggering some sort of bug in the Linux Java
implementation (Java code isn't supposed to cause segmentation
faults, as you know).
So might try rearranging this code I added, or even testing to
see if its dividing by zero or something like that. If you
come up with a fix, feel free to update the system.
Cheers,
Bill
----------------------------------------------------------
Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706
hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html
