| object graphics: any similar tools already written? [message #54220] |
Fri, 25 May 2007 14:54 |
jkj
Messages: 48
Registered: April 2007
|
Member |
|
|
All right, IDL object graphics is driving my dyslexia into orbit.
What I've done for now is put some code together that allows me to
extend some of the view properties to a separate GUI so that I can
dynamically see the effect changing viewplane_rect, location, and
dimensions have on my image. I'll post a copy here:
safaripass.com/IDL/extend_view_controls.pro
in case anyone wants to try this crude but functional contribution.
I'm going to extend the idlgrplot properties as well but figured if I
posted this someone might say "hey, this sort of thing has already
been done - look 'here'" or "dude, your buttons are so crude - why not
use 'this'" or whatever (my coding style is not changing, tough
luck!).
Basically, to call this thing, create an idlgrwindow, a view of some
sort which is drawn by that window and a view in which your image is
displayed. My test code for this is:
safaripass.com/IDL/widget_object_test.pro
where I'm manipulating an object graphic within a widget_draw canvas.
This bit of code would work just as well:
pro small
ydata = indgen(520, /float)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
lplot = obj_new('idlgrplot', ydata)
view = obj_new('idlgrview', viewplane_rect=[-200,-50,800,800])
model = obj_new('idlgrmodel')
scene = obj_new('idlgrscene')
win = obj_new('idlgrwindow', retain=2)
model->add, lplot
view->add, model
scene->add, view
win->draw, scene
extend_view_controls, view, win, scene, $
title='testing only'
end ; end pro small
The ultimate goal here, for me, is to learn some keys to "safe
passage" through IDL's object graphics and interactive widgets. Once
I learn a few safe, reliable paths from which complicated widget/
graphics can be built I won't care about the esoteric stuff. For now,
however, I find myself unable to predict the visual effect when
stringing one or more object graphic commands together. It does seem
to me that although pixel units pops up as default for object
graphics, IDL really, really intends for everything to be defined in
terms of normal units. The referenced code uses pixel units, but I
think I'm about to conclude that pixel units are not one of the keys
to "safe passage".
Cheers,
-Kevin
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
