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Re: IDL objects and names [message #34057 is a reply to message #33970]

Wed, 12 February 2003 12:50

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

"Sebastian" <s@visita2.die.upm.es>

> Is there something like an IDLClass that all IDLgr* classes inherit from?
> I know that the reference manual says for most of the IDLgr* classes "This
> class has no superclasses", but is it true? I mean, what's the point of
> having "objects" and making no use of their (theoretical) capabilities?

FWIW, all atomic graphics objects inherit IDLgrGraphic (structure objects do
not).

IDL> obj = obj_new('IDLgrPolyline')
IDL> obj -> IDLgrGraphic::GetProperty, ALL=a
IDL> help, a, /struct
** Structure <195dc18>, 11 tags, length=128, data length=123, refs=1:
COLOR BYTE Array[3]
HIDE LONG 0
NAME STRING ''
PALETTE OBJREF <NullObject>
PARENT OBJREF <NullObject>
XCOORD_CONV DOUBLE Array[2]
XRANGE DOUBLE Array[2]
YCOORD_CONV DOUBLE Array[2]
YRANGE DOUBLE Array[2]
ZCOORD_CONV DOUBLE Array[2]
ZRANGE DOUBLE Array[2]

COLOR, HIDE, NAME, PALETTE, and PARENT are obvious. [XYZ]RANGE contains the
min and max values of the object's position in object space.
[XYZ]COORD_CONV values are as documented in the subclass's documentation and
are used in constructing a transformation matrix which transforms the object
from object space to normalized space (or some other scaled space).

I can dig up the methods if you like.

What you can do with it is another question...

-Rick

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[Message index]

		IDL objects and names By: s[1] on Wed, 12 February 2003 03:32
		Re: IDL objects and names By: David Fanning on Wed, 12 February 2003 17:36
		Re: IDL objects and names By: Rick Towler on Wed, 12 February 2003 14:17
		Re: IDL objects and names By: dick on Wed, 12 February 2003 13:47
		Re: IDL objects and names By: David Fanning on Wed, 12 February 2003 13:38
		Re: IDL objects and names By: Rick Towler on Wed, 12 February 2003 12:50
		Re: IDL objects and names By: Pavel A. Romashkin on Wed, 12 February 2003 10:38
		Re: IDL objects and names By: Randall Skelton on Wed, 12 February 2003 08:42
		Re: IDL objects and names By: David Fanning on Wed, 12 February 2003 07:16
		Re: IDL objects and names By: David Fanning on Wed, 12 February 2003 07:09
		Re: IDL objects and names By: s[1] on Wed, 12 February 2003 06:37
		Re: IDL objects and names By: David Fanning on Wed, 12 February 2003 05:33

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