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Re: bug in 'axis'? [message #44633 is a reply to message #44552]

Wed, 29 June 2005 23:16

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Grant W. Petty wrote:
>
> I am using IDL (Version 5.4 (linux x86)) routines 'scale3',
> 'shade_volume', 'polyshade', and 'tvscl' to render and display a 3-D
> array. I am subsequently using 'axis' to add cartesian axes to the
> rendered image.
>
> Everything works fine, PROVIDED that there is a call to 'plot' somewhere
> before the first call to 'axis'. It doesn't matter what I'm plotting or
> how things are scaled, but if I comment out the call to plot, the later
> 'axis' call renders what appears to be an axis of zero length.
>
> It's not clear to me why 'axis' should depend on a prior call to 'plot'.
> Is there a system variable that needs to be initialized before the call
> to 'axis'? Can I do this without a 'plot' call?

I don't know why this doesn't work, but clearly something
is not being set up that should be. I would replace your
SCALE3 command with this:

SURFACE, DIST(5), /NODATA, /SAVE, XRANGE=[0,63], $
YRANGE=[0,63], ZRANGE=[0,depth], XSTYLE=1, $
YSTYLE=1, ZSTYLE=1, CHARSIZE=1.5

Now you will have a 3D coordinate space and your AXIS command
will work appropriately.

Cheers,

David

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[Message index]

		bug in 'axis'? By: Grant W. Petty on Tue, 28 June 2005 12:57
		Re: bug in 'axis'? By: David Fanning on Wed, 29 June 2005 23:16
		Re: bug in 'axis'? By: Michael Wallace on Wed, 29 June 2005 07:46
		Re: bug in 'axis'? By: ph le sager on Wed, 29 June 2005 01:36

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