| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1305.1 | | WRKSYS::CHALTAS | Intelligence is no bad thing | Tue Jun 03 1997 17:17 | 28 |
| Well, it's a little more complicated than that, but first:
How did you get a PS 4D60T to run on UNIX V3.2G? Unix V4.0 is the
minimum rev. for this board.
Now the relevant answers:
Save-Unders & Backing Store are disabled by default. You can
enable them by editing the string "-bs -su" out of
/usr/lib/X11/Xserver.conf
Don't edit out anything else, then restart your X server (reboot
is the easiest way).
You still won't have save-unders for everything -- but note that
save-unders are *never* guaranteed (per the X11 spec). Save-unders
have performance side effects of their own (notably, the use video
memory, which is a scarse resouces) which can *adversly* effect
performance -- that's one reason they are generally turned off.
Also, I'm pretty sure that save-unders *only* work on X11 stuff, and
not on OpenGL buffers -- but someone may correct me on this.
Now -- are you sure that you understand what the customer means by
slow repaints? It's possible that lack of save-unders isn't the
real problem.
George
|
| 1305.2 | Thanks. | BALTMD::GLOCK | | Wed Jun 04 1997 09:20 | 22 |
|
I have been working with Ken and the customer on this. The problem has
not been seen on DU 3.2-G per 1305.0 ( like .-1 says the 4D60T is not
supported), it has been seen on DU 4.0-B with Open3D 4.2 and 4.3.
The customer is running a 3D application from Computer Vision (Optegra
Visualizer). After dismissing any dialog window that obscures a
portion of the 3D drawing that portion of the drawing is repainted.
This is taking anywhere from 5-10 seconds. The HP box is not redrawing
the obscured portion of the drawing, it is immediately replaced after
the dialog window is dismissed (1 sec at most).
His 3D image is of a control room with lots of furniture etc. He is
complaning of a very shakey redrawing of the 3D image when moving around
outside of the room (looking at the room from a distance). When he moves
around inside the room the motion is very fluid. Could this also be
caused by the lack of save-unders?
Thanks for the help.
Karl Glock
DTN: 339-5244
|
| 1305.3 | it's an application issue | WRKSYS::CHALTAS | Roland the Headless Thompson Grape | Wed Jun 04 1997 12:22 | 8 |
| Enabling save-unders will probably not help this repaint.
From your description, it's likely that the HP system is using
overlays for the dialog window. Since the HP graphics API is
probably Starbase, the application's behavior on the HP system and
the DIGITAL system (which will be using OpenGL) are very different.
Alas, CV has not been providing very aggressive support for Visualizer
on the DIGITAl platforms, and doesn't support Overlays on DIGITAL
platforms.
|
| 1305.4 | Thanks. | BALTMD::GLOCK | | Thu Jun 05 1997 09:33 | 5 |
|
Thanks for the info. It appears that again we lose do to lack of
application support even though we have the best platform.
Karl Glock
|
| 1305.5 | tell SPG | WRKSYS::CHALTAS | Sex, Drugs & Opera | Fri Jun 06 1997 09:40 | 2 |
| Known problem with CV in general. You might want to share your
experience with Ralph Campanelli ([email protected])
|