How to understad .obj files #20704
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I saved the streamer simulation results as files with the obj extension. I want to understand exactly what it contains. As far as I figured out, the three columns are the coordinates in which the physical quantity takes the value specified at the beginning of the file. But the notation v, vn, vt, f is unclear. For some reason, some values are negative. I have attached an example of such a file. |
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Replies: 1 comment 2 replies
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Hi @Friedrih. Wavefront OBJ is a 3D geometry file format. Scientific data isn't necessarily its strength, but we support OBJ export so that you can load meshes into tools like Microsoft Powerpoint, for example. There are many tools that support OBJ for visualization so we include it as an export option for interoperability. The file format is well documented in various places, one of which is Wikipedia.
We stuff simulation mesh field data into a texture, so the texture coordinates tell the data reader how to understand that texture. Let me know if you have further questions. |
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Well, now it became more clear. Thank you very much. |
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Happy to help! Please let us know if you have further questions! |
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Hi @Friedrih. Wavefront OBJ is a 3D geometry file format. Scientific data isn't necessarily its strength, but we support OBJ export so that you can load meshes into tools like Microsoft Powerpoint, for example. There are many tools that support OBJ for visualization so we include it as an export option for interoperability. The file format is well documented in various places, one of which is Wikipedia.
vis notation for vertices,vnare vertex normals,vtare texture coordinates, andfare polygonal faces.We stuff simulation mesh field data into a texture, so the texture coordinates tell the data reader how to understand that texture. Let me know if you have further questions.