| VERT_COLORS Problem [message #86631] |
Mon, 25 November 2013 02:03  |
Udo Grabowski
Messages: 17
Registered: February 2000
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Junior Member |
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Hi,
I struggle with an animated tool that uses the "new style"
surface function, and I'm trying to update the vert_colors
option (which is tagged as updateable in the docs), but
it does not work at all. What I'm doing wrong here ?
; boring flat grey semi-transparent surface
; (poor man's transparency, as always in IDL....)
v = dist(10)
rgba = intarr(4,100)
rgba[0:*,0:*] = 110
S = surface(v,vert_colors=rgba)
; update to light grey nearly transparent
rgba[0:*,0:*] = 210
S.vert_colors=rgba
; still the same boring grey !
I tried several variants, setting vert_colors to 0,
refresh, different sequences in doing that, using
S->SetProperty,vert_colors=..., etc.etc.,
no help, it seems that this is just an immutable
variable and the documentation is wrong.
Used to work with 8.1, tried that also with 8.2.3,
but the 8.2.x version is so utterly borked in 3D that even
reporting all bugs is far beyond my time constraints....
IDL is using the OpenGL hardware driver of my NVIDIA
Quadro 2000 (running the solaris 64-bit version on openindiana 151a7).
Any ideas how to get that working ?
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| Re: VERT_COLORS Problem [message #86637 is a reply to message #86631] |
Mon, 25 November 2013 06:00  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Udo Grabowski writes:
> I struggle with an animated tool that uses the "new style"
> surface function, and I'm trying to update the vert_colors
> option (which is tagged as updateable in the docs), but
> it does not work at all. What I'm doing wrong here ?
>
> ; boring flat grey semi-transparent surface
> ; (poor man's transparency, as always in IDL....)
> v = dist(10)
> rgba = intarr(4,100)
> rgba[0:*,0:*] = 110
> S = surface(v,vert_colors=rgba)
>
> ; update to light grey nearly transparent
> rgba[0:*,0:*] = 210
> S.vert_colors=rgba
> ; still the same boring grey !
>
> I tried several variants, setting vert_colors to 0,
> refresh, different sequences in doing that, using
> S->SetProperty,vert_colors=..., etc.etc.,
> no help, it seems that this is just an immutable
> variable and the documentation is wrong.
It would seem so, although I just tested this with my cgSurface program
and it would appear it is *possible* to change the vert_colors. In my
case, though, it is necessary to first turn the vert colors off, then on
again. In my test case, the code looks like this:
rgba = info.rgba
rgba[2,*] = 0
info.thisSurface -> SetProperty, Vert_Colors=0
info.thisSurface -> SetProperty, Vert_Colors=rgba
I did confirm this does NOT work with the Surface function though, so
something else is broken there.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")
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| Re: VERT_COLORS Problem [message #86773 is a reply to message #86637] |
Mon, 02 December 2013 09:57 |
chris_torrence@NOSPAM
Messages: 528
Registered: March 2007
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Senior Member |
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On Monday, November 25, 2013 7:00:14 AM UTC-7, David Fanning wrote:
> Udo Grabowski writes:
>
>
>
>> I struggle with an animated tool that uses the "new style"
>
>> surface function, and I'm trying to update the vert_colors
>
>> option (which is tagged as updateable in the docs), but
>
>> it does not work at all. What I'm doing wrong here ?
>
>>
>
>> ; boring flat grey semi-transparent surface
>
>> ; (poor man's transparency, as always in IDL....)
>
>> v = dist(10)
>
>> rgba = intarr(4,100)
>
>> rgba[0:*,0:*] = 110
>
>> S = surface(v,vert_colors=rgba)
>
>>
>
>> ; update to light grey nearly transparent
>
>> rgba[0:*,0:*] = 210
>
>> S.vert_colors=rgba
>
>> ; still the same boring grey !
>
>>
>
>> I tried several variants, setting vert_colors to 0,
>
>> refresh, different sequences in doing that, using
>
>> S->SetProperty,vert_colors=..., etc.etc.,
>
>> no help, it seems that this is just an immutable
>
>> variable and the documentation is wrong.
>
>
>
> It would seem so, although I just tested this with my cgSurface program
>
> and it would appear it is *possible* to change the vert_colors. In my
>
> case, though, it is necessary to first turn the vert colors off, then on
>
> again. In my test case, the code looks like this:
>
>
>
> rgba = info.rgba
>
> rgba[2,*] = 0
>
> info.thisSurface -> SetProperty, Vert_Colors=0
>
> info.thisSurface -> SetProperty, Vert_Colors=rgba
>
>
>
> I did confirm this does NOT work with the Surface function though, so
>
> something else is broken there.
>
>
>
> Cheers,
>
>
>
> David
>
>
>
>
>
> --
>
> David Fanning, Ph.D.
>
> Fanning Software Consulting, Inc.
>
> Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
>
> Sepore ma de ni thue. ("Perhaps thou speakest truth.")
Hi all,
This is indeed a bug. For whatever reason, the vert_colors property is being swallowed. I've fixed the code for the next IDL release (after IDL 8.3), but in the meantime, you have two options: you can either pass in the vert_colors when you create the surface, or you can hack in the fix. To fix the code, edit <idl_dir>/lib/itools/components/idlitvissurface__define.pro. In the ::SetProperty method, look for the following line:
VERT_COLORS=swallow, $
Change this to:
VERT_COLORS=vertColors, $
Then, right after the compile_opt line, add the following code:
if (N_ELEMENTS(vertColors) gt 0) then begin
oVertColor = self->getParameter('VERTEX COLORS')
if (ISA(oVertColor)) then begin
success = oVertColor->SetData(vertColors)
endif else begin
self._oSurface->SetProperty, VERT_COLORS=vertColors
endelse
endif
Hope this helps!
Cheers,
Chris
ExelisVIS
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