2.1. Problem: Incorrect data display
Description:
Sometimes data depictions display incorrectly or not at all when
re-projected from native data projections. They should always
display correctly in their native projections. Before you display the
data, choose the menu.
If you display the data in a non-native projection and Use Fast Rendering
is set (the default) and the data does not correctly display, turn
off Use Fast Rendering through the menu
of the display control to account for projection seams.
2.2. Problem: Spurious map lines
Description:
Starting with IDV 2.7, some computers are experiencing spurious map
lines in their displays. This seems to be a graphics driver issue being
tickled by a change in this and later versions. If you are experiencing
this, please use the , System tab,
uncheck the "Enable geometry by reference" option, click
OK and restart the IDV. That should clear up the spurious lines.
2.3. Problem: Irregular animation loop
Description:
An animation loop of two or more displays may not advance the
individual displays at exactly the same time in each step, creating a
staggered or irregular loop, on some systems. Use the individual time
step buttons to step through the frames, one at a time,
to avoid the irregular loading.
2.4. Problem: Time label in menu is not in sync with an animation loop.
Description:
Use the on-display time label
turned on with the menu.
2.5. Problem: Multiple vector displays
Description:
If you have multiple vector displays and you change the size, autosize,
color, or streamline options in the control, changes may be applied
to the other displays as well.
2.6. Problem: Vector size changes
Description:
The first time you change the color on a vector plan view
display, the size of the vectors/barbs may shrink.
2.7. Problem: Contours over topography do not show up.
Description:
If you display a 2D field as contours draped over topography, the
contours may not show up. There may be two reasons for this:
- You are using the Direct-X version of Java 3D on Windows which
does not support the polygon offset feature. Try the OpenGL version
instead.
- On some systems, the ordering of the displays can affect the
visibility. Until the IDV support layering, try adding the
contours after the topography field.
2.8. Problem: Changing the line width on maps, curves, etc has no effect.
Description:
If you are using the Direct-X version of Java 3D on Windows,
changing line width has no effect. Direct-X does not support setting
the line width features. Try using the OpenGL version instead.
2.9. Problem: For a color shaded display, changing the display unit does not
give the correct image colors.
Description:
If you change the display unit for a color shaded display, the color
table range values will look correct, but the display will not be
correct. Set the display unit again and it will update correctly.
2.10. Problem: Setting a display transparent has no effect
Description:
Using transparency in a color display may give unexpected results.
In general, only the last thing added can be fully transparent.
If you have a display that is transparent, then add in a new display,
you may not see it. The problem is caused by the lack of ordering
in Java 3D. You can use the display control's View->Bring to Front
menu to remove and re-add the display that you want to be transparent
so it is last.
2.11. Problem: Projection lost for dimensionless vertical coordinates
Description:
If you have a grid which uses a dimensionless CF vertical coordinate
convention, the original projection information is lost when you try
to display it. This is a result of keeping a relationship between
the dimensionless coordinate and the corresponding height values.
2.12. Problem: Color scale disappears in perspective view
Description:
If you have the map display in a perspective view, a background image
that extends beyond the box boundaries will hide any color scales in
the display. Two workarounds are: 1) use parallel view
(uncheck ) or 2) clip
the view at the box ().
2.13. Problem: Parallels Access on OS X
Description:
If you have Parallels Access running on your OS X computer, you may see the IDV
freeze up upon start up. The workaround is to turn off Parallels Access.
