I've been cooperating with the SAGE development team to get Jmol
working better for viewing 3-D plots in SAGE. We are still discussing
what a plot primitive would look like, but I ultimately think that is
the way things should go.
However, a separate issue of how meshes look has come up. Their
first request was easy to deal with. I'm simply loading each surface
twice and displaying one copy as mesh to allow for meshes of arbitrary
color compared to the solid surface. We may want to include something
different in the plot primitive, but this works well for now. The
second issue is harder to deal with. Using either the built-in mesh
or the second surface as mesh, mesh lines disappear as the surface
angles back. At first I thought this was a perspective issue, but it
seems to have something to do with whether solid surface or line color
takes precedence for a pixel. Setting the solid surface to slightly
translucent solves the problem for the case where I use a second
surface to display the mesh. So the question for people who know more
about the rendering is if there is a way the meshes could be made to
have precedence when coloring a pixel, without making the solid
surface translucent? One problem I foresee is that as we approach the
vanishing point the color of the surface should take precedence.
Maybe the balance needs to be adjusted?
Jonathan
Dr. Jonathan H. Gutow
Chemistry Department [email protected]
UW-Oshkosh Office:920-424-1326
800 Algoma Boulevard FAX:920-424-2042
Oshkosh, WI 54901
http://www.uwosh.edu/facstaff/gutow
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