[yt-users] Colorbar and labels on volume rendered images
Chris Malone
chris.m.malone at gmail.com
Wed Jan 5 10:28:51 PST 2011
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<http://www.astro.utoronto.ca/%7Eh-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
>>>>
>>>>
>>>
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>>>
>>
>>
>> --
>> Elizabeth Harper-Clark MA MSci
>> PhD Candidate, Astrophysics, UofT
>>
>>
>> www.astro.utoronto.ca/~h-clark <http://www.astro.utoronto.ca/%7Eh-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 <http://www.astro.utoronto.ca/%7Eh-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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