| Re: How to export programmatically a volume with IVOLUME to images [message #60321] |
Tue, 20 May 2008 05:38  |
Kenneth P. Bowman
Messages: 585
Registered: May 2000
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Senior Member |
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In article
<d088ae51-68be-4983-b361-666923cef317@8g2000hse.googlegroups.com>,
"yingjie, Peng" <yingjiepeng@yahoo.com> wrote:
> Dear all,
>
> I would like to make a short animation of my rotating volume data. I
> think this could be done by rotating the volume a small angle each
> time and export corresponding image and then put the images sequence
> together. One can use XVOLUME, XVOLUME_ROTATE and XVOLUME_WRITE_IMAGE
> to get this job done easily, however iVOLUME offers more possible
> choices of configurations, which I prefer to.
>
> I already figured out how to rotate the ivolume object
> programmatically by:
> idTool = itgetcurrent(TOOL=oTool)
> temp = oTool->FindIdentifiers('*DATA SPACE',/VISUALIZATIONS)
> idDataSpace = temp[0]
> oDataSpace = oTool->GetByIdentifier(idDataSpace)
> oDataSpace->GetProperty, PARENT=oDataSpaceRoot
> oDataSpaceRoot->Rotate, [0,0,1], 20
> oTool->RefreshCurrentWindow
>
> But after hours� attempt, I still do not know how to export the image
> from the ivolume. Of course I can choose �export� to file from the
> ivolume menu and then I have to do this hundreds of times to make a
> animation :(
> I found David had some similar explanations here:
> http://www.dfanning.com/itool_tips/newdata.html
> but it seems to me this will only work with iImage�
>
> I am not experienced at all with iTools Object Classes and any
> suggestions or clues would be greatly appreciated.
>
> with best regards,
> Yingjie
You can download my IDL library (bowman_lib.zip) from here
http://idl.tamu.edu/Downloads.html
It contains routines to do what you want.
Ken Bowman
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| Re: How to export programmatically a volume with IVOLUME to images [message #60330 is a reply to message #60321] |
Mon, 19 May 2008 20:12  |
Michael Galloy
Messages: 1114
Registered: April 2006
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Senior Member |
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yingjie, Peng wrote:
> Dear all,
>
> I would like to make a short animation of my rotating volume data. I
> think this could be done by rotating the volume a small angle each
> time and export corresponding image and then put the images sequence
> together. One can use XVOLUME, XVOLUME_ROTATE and XVOLUME_WRITE_IMAGE
> to get this job done easily, however iVOLUME offers more possible
> choices of configurations, which I prefer to.
>
> I already figured out how to rotate the ivolume object
> programmatically by:
> idTool = itgetcurrent(TOOL=oTool)
> temp = oTool->FindIdentifiers('*DATA SPACE',/VISUALIZATIONS)
> idDataSpace = temp[0]
> oDataSpace = oTool->GetByIdentifier(idDataSpace)
> oDataSpace->GetProperty, PARENT=oDataSpaceRoot
> oDataSpaceRoot->Rotate, [0,0,1], 20
> oTool->RefreshCurrentWindow
>
> But after hours� attempt, I still do not know how to export the image
> from the ivolume. Of course I can choose �export� to file from the
> ivolume menu and then I have to do this hundreds of times to make a
> animation :(
> I found David had some similar explanations here:
> http://www.dfanning.com/itool_tips/newdata.html
> but it seems to me this will only work with iImage�
>
> I am not experienced at all with iTools Object Classes and any
> suggestions or clues would be greatly appreciated.
>
> with best regards,
> Yingjie
Just get the iTools window object and ask for its data:
IDL> f = filepath('head.dat', subdir=['examples', 'data'])
IDL> head = bytarr(80, 100, 57)
IDL> openr, lun, f, /get_lun
IDL> readu, lun, head
IDL> free_lun, lun
IDL> ivolume, head ; hit the "Render" button after it comes up
IDL> toolId = itgetcurrent(tool=tool)
IDL> win = tool->getByIdentifier('/tools/volume tool/window')
IDL> help, win
WIN OBJREF = <ObjHeapVar16322(IDLITGRWINSCENE)>
IDL> win->getProperty, image_data=im
IDL> help, im
IM BYTE = Array[3, 824, 589]
IDL> window, xsize=824, ysize=589
IDL> tv, im, true=1
This could be made more robust by using findIdentifiers (like in you
example) to get the ID since it won't always be '/tools/volume
tool/window' (like if you have multiple iVolume tools open).
Mike
--
www.michaelgalloy.com
Tech-X Corporation
Software Developer II
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| Re: How to export programmatically a volume with IVOLUME to images [message #60334 is a reply to message #60330] |
Mon, 19 May 2008 19:08 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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yingjie, Peng writes:
> I would like to make a short animation of my rotating volume data. I
> think this could be done by rotating the volume a small angle each
> time and export corresponding image and then put the images sequence
> together. One can use XVOLUME, XVOLUME_ROTATE and XVOLUME_WRITE_IMAGE
> to get this job done easily, however iVOLUME offers more possible
> choices of configurations, which I prefer to.
>
> I already figured out how to rotate the ivolume object
> programmatically by:
> idTool =3D itgetcurrent(TOOL=3DoTool)
> temp =3D oTool->FindIdentifiers('*DATA SPACE',/VISUALIZATIONS)
> idDataSpace =3D temp[0]
> oDataSpace =3D oTool->GetByIdentifier(idDataSpace)
> oDataSpace->GetProperty, PARENT=3DoDataSpaceRoot
> oDataSpaceRoot->Rotate, [0,0,1], 20
> oTool->RefreshCurrentWindow
>
> But after hours=92 attempt, I still do not know how to export the image
> from the ivolume. Of course I can choose =93export=94 to file from the
> ivolume menu and then I have to do this hundreds of times to make a
> animation :(
> I found David had some similar explanations here:
> http://www.dfanning.com/itool_tips/newdata.html
> but it seems to me this will only work with iImage=85
>
> I am not experienced at all with iTools Object Classes and any
> suggestions or clues would be greatly appreciated.
Somehow (I don't have the foggiest idea about how) you have
to get the ID of the draw widget the volume is displayed in.
From there you can get the window object:
Widget_Control, drawWidgetID, Get_Value=windowObject
Then, you can take a snapshot of the window as an image:
windowObject -> GetProperty, Image_Data=snapshot
From there, you can just write any kind of file you like:
Write_JPEG, 'frame_1.jpg', snapshot, TRUE=1
I guess the key would be figuring out how to get the draw
widget ID.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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