| "Object Graphics and Vectors" Reloaded [message #40318] |
Tue, 03 August 2004 05:35 |
Ralf Schaa
Messages: 37
Registered: June 2001
|
Member |
|
|
...sorry, I pushed the button too quick...
G'day group,
a few days ago I had a question of how to plot a spacecraft trajectory
with object graphics. After David's hint to use IDLgrPolyline when
plotting an orbit around a sphere in 3d I was able to do that, and it
looks great.
But now I am stucked with this:
How to plot some vectors (the spacecraft's velocity vector) for some
defined times on that spacecraft trajectory.
I found Rick Towlers 'vector' Object , which he posted 2002 and it
plotted a vector in my scene, unfortunately not in the right scale and
at the right place, i tried the coord_conv but this did not help ...
Of course there is a scaling problem, since the magnitude of the s/c
velocity is much less than the scale of the coordinate system, so i
multplied with a factor that makes sure I'd see the vector ...
So, has someone a clue of how to set the scales right for that
vector-object, or should I consider a new approach?
Thanks a lot
-Ralf
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
