December 2019 - OpenMesh - lists.rwth-aachen.de

OpenMesh with OpenMP
by LuWang (Jack) 13 Dec '23

13 Dec '23

Hello Madam or Sir, I am the user of OpenMesh, and I want ask some questions about the parallel code with OpenMesh, exactly, the parallel code is based on OpenMP on the VS2013. The first question: When I use the OpenMP on the VS2013 to speed up the program which write with OpenMesh, for example, I add the code: #pragma omp parallel for num_threads(7) , just like the following: and the errors follow, and I do not know why. and the second question: Could the code with iterator of OpenMesh be paralleled by OpenMP just like " for (TriMesh::FaceIter f_it = mesh.faces_begin(); f_it != mesh.faces_end(); f_it++) " in the above picture? or How can I parallel the code with iterator of OpenMesh? Thank you for your time! And I am looking forward to your reply. Sincerely LuWang

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Problem using eigen vectors
by Matthias Hackel 20 Dec '19

20 Dec '19

Hello OpenMesh Team, Thanks for developing OpenMesh and all of its features ! We got a problem when we try to switch to Eigen::vector3d as data type, specifiing the mesh as desribed in https://www.openmesh.org/media/Documentations/OpenMesh-Doc-Latest/a04077.ht… always leads to an Error C2440 '<function-style-cast>': cannot convert from 'const Eigen::Matrix<double,3,1,0,3,1>' to 'OpenMesh::NormalConeT<double>' (compiling source file include\OpenMesh\Tools\Decimater\ModNormalDeviationT.hh 224 Line 224 of ModNormalDeviationT.hh merge(NormalCone(mesh_.normal(*vf_it))); there a Eigen::Vector3d can not be converted to a scalar. When i switch back from Eigen representaion, everything works. We are using Visual Studio 2017 an OpenMesh 8.0. Thanks and best regards, Matthias Hackel -- Matthias Hackel Mabotic - Robotics & Automation Bonner Strasse 4 51379 Leverkusen, Germany phone: +49(0)2171-3944591 fax: +49(0)2171-5823632 mobile: +49(0)175-4069307 email: hackel(a)mabotic.de Web: http://www.mabotic.de Diese Nachricht (E-Mail) enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte umgehend den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren als auch die unbefugte Weitergabe dieser Mail ist nicht gestattet. This message (e-mail) may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender in return and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is hereby strictly forbidden.

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Geometry Decimation while preserving the texture seam line
by chengzg2008＠hotmail.com 17 Dec '19

17 Dec '19

Hi, Thanks for the good work on the OpenMesh Decimation Framework. I have two questions to check: 1. Is it possible to add support for mesh with texture coordinates. It means that while decimation, the algorithm will also take the texture coordinates change(UV shell/island shape) into consideration. In short, it not only maintains the geometry, but also tries to preserve the seam line? Something similar to Seam Aware Decimation: "https://cragl.cs.gmu.edu/seamless/", https://github.com/songrun/SeamAwareDecimater 2. If it is, how hard(how much effect) is it to add this kind of support, can you give a direction on it? Thanks & Regards, Spencer

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Hello , I got a bug whenever I use you library.
by ?? G.t Choc 13 Dec '19

13 Dec '19

Hello, I am a researcher for mesh processing, and I'm using your openmesh library. thanks for your development working, but I got a bug when I run you official code, "building a cube" [http://www.openmesh.org/media/Documentations/OpenMesh-Doc-Latest/a04088.html]. No matter whether I type codes by myself or copy your example code , there will always be a bug saying that there is a unexpectation occurring, that there is visiting conflict in posision 0x00000000000000. [cid:image001.png@01D5A9F1.FBAB55E0]

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