comp.lang.idl-pvwave archive: archive » trajectory plot behind sphere

Home » Public Forums » archive » trajectory plot behind sphere

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

trajectory plot behind sphere [message #42623]

Thu, 17 February 2005 06:41

Ralf Schaa
Messages: 37
Registered: June 2001

Member

Hi folks,

I am plotting a trajectory of a spacecraft orbit which is partially
going behind a sphere (the planet). This part, which is actually behind
the sphere is drawn right in front of the plot, but I like to have this
part of the trajectory invisble.
How can this be done?

Thanks already
-Ralf

my piece of code:

; set up 3d
Xcnt = N_Elements(X1)
Ycnt = N_Elements(X2)
Zcnt = N_Elements(X3)
Surface, FltArr(Xcnt,Xcnt), X1, X2 , $
Xrange=[-5,5] , Yrange=[-5,5], ZRange=[-5,5], $
XStyle=4, YStyle=4, ZStyle=4, TICKLEN=1, /SAVE, /NODATA

; the sphere
sphere = fltarr(20,20,20)
for x=0,19 do for y=0,19 do for $
z=0,19 do sphere[x,y,z]=sqrt((x-10)^2 + (y-10)^2 + (z-10)^2)

shade_volume, sphere, 8, v , p
v=0.1d*(v-10)
image = polyshade(v, p, /t3d)
tv,image

; draw trajectory
Plots, X1, X2, X3 , color=8, /T3D

; axis through midpoint
AXIS, 0,0,0, /XAxis, /T3D, CharSize=2.5, color=3, xtickformat='(i8)'
AXIS, 0,0,0, /YAxis, /T3D, CharSize=2.5, color=3, ytickformat='(i8)'
AXIS, 0,0,0, /ZAxis, /T3D, CharSize=2.5, color=3, ztickformat='(i8)'

Report message to a moderator

[Message index]

trajectory plot behind sphere

By: Ralf Schaa on Thu, 17 February 2005 06:41

Previous Topic:	Re: dll not loading
Next Topic:	dll not loading

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 03:10:02 PDT 2025

Total time taken to generate the page: 4.76348 seconds