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<p class="MsoNormal">Hi YT,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have an enormous Enzo file that I want to volume render. It takes way too long to render it at full resolution. I have extracted a covering grid and dumped the raw data to a file. Then I read that data into another rendering engine (Boo)
and rendered it. What I want to do is volume render it with YT. I generate the covering grid like this:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">max_level=1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">lowerleft = [0.,0.,0.]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">datasetname = "/work/01197/semeraro/Cooldata"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">ds = yt.load(datasetname)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">cg = ds.covering_grid(max_level,lowerleft,ds.domain_dimensions*2**max_level)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">Then I try to do something like this:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">min,max = cg.quantities.extrema(‘Density’)
<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">and I get a stack trace ending in <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> File "/work/01197/semeraro/maverick/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 578, in selector<o:p></o:p></p>
<p class="MsoNormal"> raise YTDataSelectorNotImplemented(self._type_name)<o:p></o:p></p>
<p class="MsoNormal">yt.utilities.exceptions.YTDataSelectorNotImplemented: Data selector 'covering_grid' not implemented.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Obviously I cant do that. So what am I doing wrong here? The idea is to sample the first two levels onto the regular covering grid and volume render that rather than the whole grid. I have tried using parallel volume rendering but there
seems to be some problem in collecting the final image as only parts of the whole image appear.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks, Dave<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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