[yt-users] Colorbar and labels on volume rendered images
Matthew Turk
matthewturk at gmail.com
Wed Jan 5 19:40:08 PST 2011
Hi Libby,
You might have to rebuild:
$ python2.6 setup.py build_ext -i
It's also possible that if you *installed* (with "python2.6 setup.py
install" rather than "python2.6 setup.py develop") you may have to
reinstall. Failing that, you could try re-cythonizing (which will
mess up the instinfo command!) with "cython
yt/utilities/amr_utils.pyx" and then rebuilding.
As another quick note, I seem to recall Cameron Hummels writing
something to mock up an annotated colorbar using just the
simple_writing and colorbar grabber modules.
-Matt
On Wed, Jan 5, 2011 at 10:55 AM, Elizabeth Harper-Clark
<h-clark at cita.utoronto.ca> wrote:
> Hi Chris,
>
> [h-clark at tpb5 yt-hg]$ hg identify
> 4db47be8e251 (yt) tip
>
> [h-clark at tpb4 my_scripts]$ tail -1 ~/YT/src/yt-hg/yt/utilities/amr_utils.pyx
> include "_amr_utils/freetype_writer.pyx"
>
> I'm confused too!!
>
> Libby
>
>
> On 5 January 2011 13:28, Chris Malone <chris.m.malone at gmail.com> wrote:
>>
>> Hi Libby,
>>
>> I'm not entirely sure what is going on here. Which changeset are you
>> using? I have the most recent, and I indeed see the
>> yt.utilities.amr_utils.simple_writing method whose non-existence it is
>> complaining about.
>>
>> To be more precise, is the freetype_writer included in your
>> yt/utilities/amr_utils.pyx?
>>
>> [cmalone at xrb yt-hg]$ tail -1 yt/utilities/amr_utils.pyx
>> include "_amr_utils/freetype_writer.pyx"
>>
>> Chris
>>
>> On Wed, Jan 5, 2011 at 12:22 PM, Elizabeth Harper-Clark
>> <h-clark at cita.utoronto.ca> wrote:
>>>
>>> Hi guys,
>>>
>>> I found the annotate_image option within yt.visualization.image_writer
>>> but I am missing something:
>>>
>>> Script:
>>>
>>> from yt.mods import *
>>> from matplotlib import pylab
>>> import numpy as na
>>> from yt.visualization.image_writer import *
>>>
>>> output_file = "aaWoC/%s/MovieFrame_%04i"
>>>
>>> for i in range(0,189):
>>> print "Merging", i
>>> image1 = pylab.imread("aaWoC/%s/3D3Movie_%04i.png" %
>>> (sys.argv[-1],i))
>>> image2 = pylab.imread("aaWoC/%s/ColourBar.png" % sys.argv[-1])
>>>
>>> new_image = na.concatenate([image1, image2], axis=1)
>>> bitmap = write_image(new_image,output_file % (sys.argv[-1],i ))
>>> annotate_image(bitmap, "Test", 50, 50)
>>> write_bitmap(bitmap, output_file % (sys.argv[-1],i))
>>>
>>>
>>> Error:
>>>
>>> [h-clark at tpb5 my_scripts]$ python2.6 MergeImages.py GMCidresbig128a
>>> yt INFO 2011-01-05 12:18:10,296 Loading plugins from
>>> /home/h-clark/.yt/my_plugins.py
>>> /home/h-clark/YT/lib/python2.6/site-packages/matplotlib/__init__.py:833:
>>> UserWarning: This call to matplotlib.use() has no effect
>>> because the the backend has already been chosen;
>>> matplotlib.use() must be called *before* pylab, matplotlib.pyplot,
>>> or matplotlib.backends is imported for the first time.
>>>
>>> if warn: warnings.warn(_use_error_msg)
>>> Merging 0
>>> yt INFO 2011-01-05 12:18:10,473 Using only channel 1 of
>>> supplied image
>>> Traceback (most recent call last):
>>> File "MergeImages.py", line 15, in <module>
>>> annotate_image(bitmap, "Test", 50, 50)
>>> File "/home/h-clark/YT/src/yt-hg/yt/visualization/image_writer.py",
>>> line 235, in annotate_image
>>> au.simple_writing(font_path, 0, dpi, font_size, text, image, xpos,
>>> ypos)
>>> AttributeError: 'module' object has no attribute 'simple_writing'
>>>
>>>
>>> ????
>>>
>>> Also is there a way to change font colour? (in vol rend background is
>>> black so I want text in white!). will text_args = {'color':'w'} work?
>>>
>>> Many thanks,
>>>
>>> Libby
>>>
>>>
>>>
>>>
>>> On 5 January 2011 12:05, Elizabeth Harper-Clark
>>> <h-clark at cita.utoronto.ca> wrote:
>>>>
>>>> Thanks Britton,
>>>>
>>>> Concatenating is working :-) now to work out labels......
>>>>
>>>> Thanks,
>>>>
>>>> Libby
>>>>
>>>> On 5 January 2011 11:29, Britton Smith <brittonsmith at gmail.com> wrote:
>>>>>
>>>>> It is possible to attach a colormap to a volume render image. I can't
>>>>> quite remember how to do that. If someone else could chime in on that, that
>>>>> would be great.
>>>>> If you already have the colorbar image you want, you can concatenate
>>>>> two image arrays easily and then write out the new image, provided the
>>>>> arrays are the same size in one direction. With pylab, you can do something
>>>>> like this:
>>>>> from matplotlib import pylab
>>>>> import numpy as na
>>>>> from yt.visualization.image_writer import write_bitmap
>>>>> image1 = pylab.imread(file1)
>>>>> image2 = pylab.imread(file2)
>>>>> new_image = na.concatenate([image1, image2], axis=1)
>>>>> write_bitmap(new_image, output_file)
>>>>>
>>>>> I believe the image_writer now supports adding text as well, so that
>>>>> should take care of the labels.
>>>>>
>>>>> Britton
>>>>>
>>>>> On Wed, Jan 5, 2011 at 10:46 AM, Elizabeth Harper-Clark
>>>>> <h-clark at astro.utoronto.ca> wrote:
>>>>>>
>>>>>> Good morning everyone,
>>>>>>
>>>>>> I was wondering how to add colorbars and text labels (e.g. with the
>>>>>> time) to images produced through volume rendering. I am unsure of how to
>>>>>> adapt all the usual techniques I know for projections etc. gievn the
>>>>>> different technique for drawing the images. I am using a constant colorbar
>>>>>> so if anyone can suggest a post-processing way of adding to created images
>>>>>> that would work too!
>>>>>>
>>>>>> I am using the following to create my volume rendered images:
>>>>>> for i, snapshot in enumerate(cam.rotation(2.*na.pi, n_angles)):
>>>>>> print " drawing: dump =", numb, "angle =", i,
>>>>>> "shot=",shott
>>>>>> if cam._mpi_get_rank() == 0:
>>>>>> write_bitmap(snapshot, frame_template %
>>>>>> (sys.argv[-1],shott))
>>>>>> pl.draw()
>>>>>> shott = shott+1
>>>>>>
>>>>>> Many thanks,
>>>>>>
>>>>>> Libby
>>>>>>
>>>>>> --
>>>>>> Elizabeth Harper-Clark MA MSci
>>>>>> PhD Candidate, Canadian Institute for Theoretical Astrophysics, UofT
>>>>>> Sciences and Engineering Coordinator, Teaching Assistants' Training
>>>>>> Program, UofT
>>>>>>
>>>>>> www.astro.utoronto.ca/~h-clark
>>>>>> h-clark at cita.utoronto.ca
>>>>>> Astronomy office phone: +1-416-978-5759
>>>>>>
>>>>>> _______________________________________________
>>>>>> yt-users mailing list
>>>>>> yt-users at lists.spacepope.org
>>>>>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> yt-users mailing list
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Elizabeth Harper-Clark MA MSci
>>>> PhD Candidate, Astrophysics, UofT
>>>>
>>>> www.astro.utoronto.ca/~h-clark
>>>> h-clark at cita.utoronto.ca
>>>> AIM: edphc1
>>>> MSN: edphc1 at hotmail.com
>>>> Skype: eharperclark
>>>> Office phone: 416-978-5759
>>>
>>>
>>>
>>> --
>>> Elizabeth Harper-Clark MA MSci
>>> PhD Candidate, Astrophysics, UofT
>>>
>>> www.astro.utoronto.ca/~h-clark
>>> h-clark at cita.utoronto.ca
>>> AIM: edphc1
>>> MSN: edphc1 at hotmail.com
>>> Skype: eharperclark
>>> Office phone: 416-978-5759
>>>
>>> _______________________________________________
>>> yt-users mailing list
>>> yt-users at lists.spacepope.org
>>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>>
>>
>>
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>>
>
>
>
> --
> Elizabeth Harper-Clark MA MSci
> PhD Candidate, Astrophysics, UofT
>
> www.astro.utoronto.ca/~h-clark
> h-clark at cita.utoronto.ca
> AIM: edphc1
> MSN: edphc1 at hotmail.com
> Skype: eharperclark
> Office phone: 416-978-5759
>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
>
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