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Re: z-buffer and /noerase ? [message #41691 is a reply to message #41675]

Tue, 09 November 2004 09:43

btt
Messages: 345
Registered: December 2000

Senior Member

sandrokan wrote:
> Ave, IDL users!
>
> I've got two contour maps that should be drawn over an image, and I'm using
> contour with /noerase key.
>
> One could expect that the second contour would be drawn over the first one.
> Strangely, if I use "set_plot, 'z'" command, the order is reversed (the
> first one is over the second one). Please see this code:
>
>
>
> pro test3
> device, decomposed=0
> loadct, 13
> set_plot, 'z'
> erase
> a=dist(50) gt 10
> contour, a, levels=[.5], color=200, /noerase
>
> contour, a-1, levels=[-.5], color=100, /noerase
>
> a=tvrd()
> set_plot, 'win'
>
> tv, a
> end
>
>
> I got a yello line (color=200) instead of the plue line (color=100).
> This problem does not happen if I use the win device....
>
>
> Thank you very much for any explanation. I use IDL5.2...
>
>
> A
>
>
Hi,

Try switching z-buffering off (I think it is sticky, so don't forget to turn it
back on which is the default.)

DEVCIE, z_buffering = 0

Ben

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[Message index]

		Re: z-buffer and /noerase ? By: sandrokan on Tue, 09 November 2004 23:32
		Re: z-buffer and /noerase ? By: btt on Tue, 09 November 2004 09:43

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