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Re: voxel_proj and seg fault [message #29552 is a reply to message #29551]

Wed, 27 February 2002 07:22

Jacques Basson
Messages: 17
Registered: May 1999

Junior Member

David Fanning wrote:
> Jacques Basson (jfb37@removeme.cam.ac.uk) writes:
>
>
>> I seem to be getting segmentation faults when using the interpolate
>> keyword to voxel_proj (strangely enough, removing the rotations gets rid
>> of the segfault, but then that's not exactly useful). It is repeatable
>> on several machines running linux or solaris. xvolume works fine, but is
>> not configurable enough (automating translations / getting a contour
>> plot instead of an image out of the thing...).
>>
>> Does anyone know of a suitable workaround, apart from not using the
>> interpolate keyword - it's nice to have smooth-looking final plots :)
>>
>
> The code you provided runs on my Windows machine,
> but I get a floating underflow warning and the
> result contains all zeros. Are you sure the code
> is doing what you *think* it is doing?
>
> Cheers,
>
> David

When I run it without the /interpolate, I get the proper result (using
my data rather than the data generated in the provided code - so I know
more or less what it is supposed to look like). Running the code
provided without interpolate and doing "tvscl, result, true=3" provides
a cube rotated appropriately. And result is definitely not all zeros.

......
IDL> result = voxel_proj(vol, rgbo)
IDL> help, result
RESULT BYTE = Array[640, 512, 3]
IDL> help, max(result)
<Expression> BYTE = 255
IDL> help, min(result)
<Expression> BYTE = 0
IDL> print, moment(result)
% Compiled module: MOMENT.
246.125 2173.24 -5.12102 24.0455

Cheers,
Jacques

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[Message index]

		Re: voxel_proj and seg fault By: Jacques Basson on Thu, 28 February 2002 01:08
		Re: voxel_proj and seg fault By: Jeff Guerber on Wed, 27 February 2002 12:11
		Re: voxel_proj and seg fault By: Rick Towler on Wed, 27 February 2002 10:13
		Re: voxel_proj and seg fault By: David Fanning on Wed, 27 February 2002 07:37
		Re: voxel_proj and seg fault By: Jacques Basson on Wed, 27 February 2002 07:22
		Re: voxel_proj and seg fault By: David Fanning on Wed, 27 February 2002 06:03

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