a fix for NVIZ site's dependency: elimination of sites lib dependency
Date: 2007-04-24 18:32, Bob Covill wrote in communication off-tracker:
The issue of the X icon displaying poorly is unrelated to the other issues. The X icon is drawn with the function gsd_x which in turn uses gsd_line_onsurf to draw the X. In other word it tries to drape the X on a surface. It appears that the gsd_line_onsurf function does NOT work.
This could be fixed (for the X icon) by simply drawing the X flat like the other icons.
Other functions which use gsd_line_onsurf include Query Raster. A line should be drawn between query points draped over the surface. This should probably be listed as a bug.
In a followup of http://www.nabble.com/Re%3A-GRASS-6.2.1RC1-published-p7837804.html Bob has sent me a new version of Gp3.c file, which gets rid of the sites dependency in NVIZ. Hovever, Bob had one doubt:
One of the parts I am not sure about is on line 138 and 139. I am not sure what this is intended to represent in the geopoint. Any insights would be appreciated.
In spite of this, it works: fetched the 6.3 cvs, overwrited the Gp3.c, built on Ubuntu Dapper using GCC 4.0.3 tcl/tk 8.4.12 on a 32bit Pentium M and all is OK!
No line artifacts, strange icons colors or random icon types. Adding/removing 2d/3d points at runtime and at NVIZ startup via 'points' option, displaying 3d points flat - all works OK.
Remaining issue is that the 'X' icon is still always rendered kindoff hovering over the surface in 2d mode, not on the surface (though other icons are fine in 2d mode). It is rendered on the correct elevation for 3d points though.
Since there's been no response from Bob on this subject for few weeks know, I decided it would be better to post this patch to the tracker so we don't loose an almost working fix. Hopefully somebody would like to look into lines 138, 139 and the 'X' icon issue.