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Re: volume() for function graphics? [message #80763 is a reply to message #80705]

Wed, 11 July 2012 09:52

chris_torrence@NOSPAM is currently offline

chris_torrence@NOSPAM
Messages: 528
Registered: March 2007

Senior Member

On Friday, July 6, 2012 11:47:20 AM UTC-6, David Grier wrote:
> Dear Folks,
>
> I've been wondering why there's no volume() function analogous
> to the other function graphics routines. Anyone know why not?
>
> TTFN,
>
> David

Hi David,
There just wasn't much demand for 3D volume rendering with new graphics. So we didn't bother to document or ship the routine. If you're really curious, you can try the following code:

function volume, arg1, arg2, DEBUG=debug, _REF_EXTRA=ex

compile_opt idl2, hidden
@graphic_error

nparams = n_params()
hasTestKW = ISA(ex) && MAX(ex eq 'TEST') eq 1
if (nparams eq 0 && ~hasTestKW) then $
MESSAGE, 'Incorrect number of arguments.'

switch (nparams) of
4: if ~ISA(arg4, /ARRAY) then MESSAGE, 'Input must be an array.'
3: if ~ISA(arg3, /ARRAY) then MESSAGE, 'Input must be an array.'
2: if ~ISA(arg2, /ARRAY) then MESSAGE, 'Input must be an array.'
1: if ~ISA(arg1, /ARRAY) then MESSAGE, 'Input must be an array.'
endswitch

name = 'Volume'
case nparams of
0: Graphic, name, _EXTRA=ex, GRAPHIC=graphic
1: Graphic, name, arg1, _EXTRA=ex, GRAPHIC=graphic
2: Graphic, name, arg1, arg2, _EXTRA=ex, GRAPHIC=graphic
3: Graphic, name, arg1, arg2, arg3, _EXTRA=ex, GRAPHIC=graphic
4: Graphic, name, arg1, arg2, arg3, arg4, _EXTRA=ex, GRAPHIC=graphic
endcase

return, graphic
end

Just save it in a file, "volume.pro". Then try:
v = VOLUME(/TEST)

Just beware that this code is untested, undocumented, and unsupported. :-)

-Chris
ExelisVIS

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[Message index]

		volume() for function graphics? By: David Grier on Fri, 06 July 2012 10:47
		Re: volume() for function graphics? By: David Fanning on Wed, 11 July 2012 09:57
		Re: volume() for function graphics? By: chris_torrence@NOSPAM on Wed, 11 July 2012 09:52
		Re: volume() for function graphics? By: dg86 on Sat, 08 September 2012 04:12
		Re: volume() for function graphics? By: dg86 on Fri, 19 October 2012 03:45
		Re: volume() for function graphics? By: chris_torrence@NOSPAM on Fri, 19 October 2012 08:20

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