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Re: VTK + IDL [message #40666 is a reply to message #40663]

Wed, 25 August 2004 07:59

Chris Lee
Messages: 101
Registered: August 2003

Senior Member

In article <da6f35c7.0408241737.7a23a499@posting.google.com>, "Hee Chun"
<chun.42@osu.edu> wrote:

> Hello,
> I learned from the previous post(from Mike) that: 'OpenGL doesn't have
> the scientific analysis capabilities of IDL and IDL
> doesn't have the graphics constructs of OpenGL'. But I need both
> analysis capabilities and graphics display for the medical image data
> sets.
> Is there any way to interface between VTK and IDL using DLM? If there
> is, Is it very hard to implement it? What kinds of problems do I need to
> consider? Where is the good starting point at least to open the 3d
> object rendered by VTK on the draw window of IDL? Any
> tips/suggestions/advices will be greatly appreciated. Thanks.
> HC

IDL can do a lot of what VTK appears to do. I.e generate 2d and 3d
images/plots. If you wanted to draw a surface for example, you would you
SHADE_SURF

;make some data
x=(findgen(100)-50.)#replicate(1,100)
y=transpose(x)
r=sqrt(x^2+y^2)
r=r*10.*!pi/180.
d=(cos(r)*exp(-r^2/50.))

;draw the data
shade_surf, d, ax=50.

IDL works a bit differently to VTK, instead of making analytic functions
and sampling them (this is what MATLAB does, right?), you make the
data first (or read the data) and make the function out of the data.

IDL is VTK with added data analysis. PV-WAVE, the poor ,
disowned sibling of IDL, uses VTK as the graphics backend (hidden beneath
layers of API). If you want to draw some 3d objects in IDL you can,
you'll probably need to learn the object graphics part of IDL, which
probably isn't any harder than learning the VTK API.

Have a look at the idldemo if you're still unsure. There are a few 3d
isosurface and medical mri images there to play with. Have a look at
David's website, http://dfanning.com/ , the IDL programs section has some
imaging examples.

Chris.

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[Message index]

		Re: VTK + IDL By: Karl Schultz on Wed, 25 August 2004 11:21
		Re: VTK + IDL By: Karl Schultz on Wed, 25 August 2004 11:17
		Re: VTK + IDL By: David Fanning on Wed, 25 August 2004 09:57
		Re: VTK + IDL By: Rick Towler on Wed, 25 August 2004 09:48
		Re: VTK + IDL By: chun.42 on Wed, 25 August 2004 08:33
		Re: VTK + IDL By: Chris Lee on Wed, 25 August 2004 07:59
		Re: VTK + IDL By: David Fanning on Wed, 25 August 2004 07:52
		Re: VTK + IDL By: Karl Schultz on Wed, 25 August 2004 07:33
		Re: VTK + IDL By: David Fanning on Tue, 24 August 2004 20:28
		Re: VTK + IDL By: Michael Wallace on Tue, 24 August 2004 20:24
		Re: VTK + IDL By: Karl Schultz on Wed, 25 August 2004 11:30
		Re: VTK + IDL By: chun.42 on Wed, 25 August 2004 19:29
		Re: VTK + IDL By: Rick Towler on Wed, 25 August 2004 13:31
		Re: VTK + IDL By: David Fanning on Wed, 25 August 2004 11:26

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