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Re: idl flythru [message #54091 is a reply to message #53996]

Wed, 23 May 2007 09:26

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

> Thanks for the support u had given to me. I am very new to IDL. Can u
> just guide me how to use these programs for my application.

Unfortunately I can't. Too busy right now...

First, just try to get the cull-n-fly program to run. Download and
unzip everything into a single directory. This includes the .dlm and
.dll files as well. Set this directory as your working directory (I do
this by checking "Change Directory on Open" on the general preferences
tab then opening the program I wish to run). Then run the program.

If it doesn't run, look closely at the errors. Most likely you'll be
either missing procedures or you'll have a path problem.

> I am having Ikonos data and DEM of the same. I want to have flythru
> and control the path using keyboard controls.

You should be able to do this (relatively) easily.

At line 501 (in camdemo_di_cullnfly.pro, will be slightly different in
the non-direct input version) you'll see the comment:

; Create something to look at...

All of the code from this point down to line 577 creates what you see
when the application runs. You'll replace that with an IDLgrSurface
object representing your DEM. You'll need to study the code a bit,
specifically how things are added to the camera (view) and lighting.

Since your new to IDL, take baby steps. Before you write a fly-thru
application, make sure you can simply create the IDLgrSurface model and
display it. Use XOBJVIEW to display it. XOBJVIEW requires that your
surface be placed in a model before display:

oSurface = OBJ_NEW('IDLgrSurface', demdata)
oModel = OBJ_NEW('IDLgrModel')
oModel -> Add, oSurface

XOBJVIEW, oModel, /BLOCK

OBJ_DESTROY, oModel

Once you can display the surface, then concentrate on adding it to the
cullnfly application.

Start slowly. Make small changes and observe their effect. And work
thru it step by step. And READ THE IDL DOCS. You can learn a lot!

-Rick

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[Message index]

		idl flythru By: prahladvkumar on Wed, 16 May 2007 01:43
		Re: idl flythru By: prahladvkumar on Thu, 17 May 2007 21:34
		Re: idl flythru By: David Fanning on Thu, 17 May 2007 22:09
		Re: idl flythru By: David Fanning on Wed, 16 May 2007 20:22
		Re: idl flythru By: Rick Towler on Wed, 23 May 2007 09:26
		Re: idl flythru By: prahladvkumar on Tue, 29 May 2007 04:00
		Re: idl flythru By: prahladvkumar on Tue, 05 June 2007 01:14
		Re: idl flythru By: prahladvkumar on Tue, 05 June 2007 00:06
		Re: idl flythru By: prahladvkumar on Mon, 04 June 2007 21:35
		Re: idl flythru By: prahladvkumar on Tue, 22 May 2007 00:59
		Re: idl flythru By: Rick Towler on Mon, 21 May 2007 14:28
		Re: idl flythru By: prahladvkumar on Tue, 05 June 2007 21:28
		Re: idl flythru By: Rick Towler on Tue, 05 June 2007 11:39

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