| Re: Object Surface Shaded by Elevation (LONG) [message #13305] |
Mon, 02 November 1998 00:00 |
Struan Gray
Messages: 178
Registered: December 1995
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Senior Member |
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David Fanning, davidf@dfanning.com writes:
>> **You can add a palette to a surface object.**
>> No doubt RSI will break this in 5.2 since I use it so much.
>
> Still works in my version of IDl 5.2. :-)
That's good to hear.
I'm not sure if I just made a lucky guess or if palettes are meant
to be more widespread in object graphics. The relevant part of the
manuals is, um, vague. It states several times that palettes can be
added to models *and* graphics atoms but nowhere documents how to use
a palette with an atom. I've done a fair amount of testing with
IDLgrSurface objects and it seems to work just as you would expect
(and saves fair bit of memory when you plot large arrays). I don't
know if the same trick works with polygons and polylines, but it's
easy enough to try.
Struan
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| Re: Object Surface Shaded by Elevation (LONG) [message #13311 is a reply to message #13305] |
Mon, 02 November 1998 00:00  |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Struan Gray (struan.gray@sljus.lu.se) writes:
> WARNING: useful but undocumented feature follows
>
> **You can add a palette to a surface object.**
> No doubt RSI will break this in 5.2 since I use it so much.
Still works in my version of IDl 5.2. :-)
Thanks for this useful information, Struan.
Cheers,
David
----------------------------------------------------------
David Fanning, Ph.D.
Fanning Software Consulting
E-Mail: davidf@dfanning.com
Phone: 970-221-0438, Toll-Free Book Orders: 1-888-461-0155
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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| Re: Object Surface Shaded by Elevation (LONG) [message #13312 is a reply to message #13305] |
Mon, 02 November 1998 00:00 |
Struan Gray
Messages: 178
Registered: December 1995
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Senior Member |
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David Fanning, davidf@dfanning.com writes:
WARNING: useful but undocumented feature follows
**You can add a palette to a surface object.**
Try replacing this line in David's program:
> thisWindow->SetProperty, Palette=thisPalette
With all of the following:
thisSurface->SetProperty, Palette=thisPalette
thisSurface2 = OBJ_NEW('IDLgrSurface', data/2, x, y, Style=style, $
Shading=0, Vert_Colors=Reform(BytScl(data), numVerts))
thisPalette2=Obj_New('IDLgrPalette')
thisPalette2->LoadCT, 0
thisSurface2 -> SetProperty, palette=thispalette2
thisSurface2->GetProperty,XRange=xrange,YRange=yrange,ZRange=zrange
xs = Normalize(xrange, Position=[-0.5,0.5])
ys = Normalize(yrange, Position=[-0.5,0.5])
zs = Normalize(zrange, Position=[-0.2,0.2])
thisSurface2->SetProperty,XCoord_Conv=xs, YCoord_Conv=ys, ZCoord_Conv=zs
thisModel->Add, thisSurface2
No doubt RSI will break this in 5.2 since I use it so much.
Struan
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