|Message: Re: Geometry from NURBS||Not Logged In (login)|
Click on the Forum title, e.g. on the "Forums by Category" page, to read a sequence of postings to the Forum and its threads all in one page. If you are only interested in one thread or the thread following a specific posting, click the thread or the posting, which takes you to a smaller page, which contains only the part you are interested in and may be easier to navigate.
Messages are "chained" if there are only replies at the first level, i.e. 1/1.html, 1/1/1.html etc. In case of "chained" messages the message number is replaced by the icon and there is no indentation.
Inline: Display the subject line only or also the text of the posting(s); for the choice "All" the "Outline" choices are switched off.
|1||0||1||no text / full text of posting|
|2||1||All||text for level 1 only / text for All postings|
Outline: Choose the depth of the posting thread, successive toggle controls provide increasing detail.
|1||2||1||2 levels / 1 level (original posting)|
|2||3||2||3 levels / 2 levels|
|3||3||All||3 levels / all levels (all postings)|
On Thu, 06 Jul 2017 12:22:03 GMT, John Apostolakis wrote:
> Dear Adam, > > Please look at the Geant4 documentation for importing CAD files. You > will need to convert the solids in the structure into triangulated > surface models, and import it using GDML or a simpler format. You can > find all this described in the Users Guide for Application Developers - > so I will not provide any pointers or additional information. There are > different tools available. > > If you want direct simulation in NURBS, there is no easily available > solution in Geant4. There is a development of 'G4DAGSolid' which allow > one to interface a geometry described to the DAGMC toolkit - which has > its own workflow. > > Note that you will need to double check that the solids created by your > phantom are bounded by a full surface, which is not missing parts. > > I note that, if there are areas which are not described by these solids, > Geant4 can cope with it, as it assumes that the material is that of the > parent volume. > > Best regards, John > > On 06.07.17 10:57, Adam Geva wrote: > > *** Discussion title: Geometry > > > > Hi, > > > > I have a human phantom describes by a NURBS structure - knots and > > control points, and materials. I was wondering whether this could > > somehow be loaded onto Geant4 to construct geometry? > > > > Thanks, Adam > > > > ------------------------------------------------------------- > > Visit this GEANT4 at hypernews.slac.stanford.edu message (to reply or unsubscribe) at: > > http://hypernews.slac.stanford.edu/HyperNews/geant4/get/geometry/1541.html >
Hi John, Thanks for your quick response! I will look into it. As a rule of thumb, should I expect better performance when importing a CAD model as opposed to using a voxelized version of the same phantom? I'm trying to gauge whether it is worth the hassle..
Thanks again, Adam
|Inline Depth:||Outline Depth:||Add message:|