# \#tessellation

**URL:** https://forum.techsoft3d.com/tag/tessellation/39.md

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## [How to associate A3DTessFaceData with its A3DTopoFaceData in HOOPS Exchange efficiently?](https://forum.techsoft3d.com/t/how-to-associate-a3dtessfacedata-with-its-a3dtopofacedata-in-hoops-exchange-efficiently/4914)

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**Author:** [@way1632023](https://forum.techsoft3d.com/u/way1632023)\
**Replies:** 0\
**Last updated:** [September 24, 2025, 9:49am UTC](https://forum.techsoft3d.com/t/how-to-associate-a3dtessfacedata-with-its-a3dtopofacedata-in-hoops-exchange-efficiently/4914 "2025-09-24T09:49:43Z")

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Is there a specific function that can directly associate a face’s tessellation data (A3DTessFaceData) with its topological face data (A3DTopoFaceData)? I have observed that the tessellation data (A3DTessBase\*) comes fro…

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## [How to get correct Geometry for multiPart/assembly file (Do we need to Merge multiParts and make a single Solid ?)](https://forum.techsoft3d.com/t/how-to-get-correct-geometry-for-multipart-assembly-file-do-we-need-to-merge-multiparts-and-make-a-single-solid/2389)

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**Author:** [@kishore.banothu](https://forum.techsoft3d.com/u/kishore.banothu)\
**Replies:** 0\
**Last updated:** [July 25, 2023, 5:49am UTC](https://forum.techsoft3d.com/t/how-to-get-correct-geometry-for-multipart-assembly-file-do-we-need-to-merge-multiparts-and-make-a-single-solid/2389 "2023-07-25T05:49:14Z")

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I was using exchange-polygonica bridge to traverse an assembly, When we have a multiPart i’m unable to get the correct Gemotry because after traversing parts, its making solid for only last part. I was thinking to creat…

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## [How-To: Read color and material information from Exchange](https://forum.techsoft3d.com/t/how-to-read-color-and-material-information-from-exchange/1568)

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**Author:** [@gabriel.peragine](https://forum.techsoft3d.com/u/gabriel.peragine)\
**Replies:** 0\
**Last updated:** [October 11, 2022, 4:00am UTC](https://forum.techsoft3d.com/t/how-to-read-color-and-material-information-from-exchange/1568 "2022-10-11T04:00:00Z")

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This article will describe the methodology that should be used to determine part and face appearances correctly. Introduction As an application developer, you want the graphical representation of imported parts to match…

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## [How-To: Overwrite color and material information in Exchange](https://forum.techsoft3d.com/t/how-to-overwrite-color-and-material-information-in-exchange/1569)

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**Author:** [@gabriel.peragine](https://forum.techsoft3d.com/u/gabriel.peragine)\
**Replies:** 0\
**Last updated:** [August 16, 2022, 4:00am UTC](https://forum.techsoft3d.com/t/how-to-overwrite-color-and-material-information-in-exchange/1569 "2022-08-16T04:00:00Z")

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This article is only about overwriting already existing colors in a model loaded with HOOPS Exchange, for further explanations about how to interpret them, please look at the following article: How-To: Read color and mat…

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## [How to know if a model contains B-Rep or Tessellated bodies](https://forum.techsoft3d.com/t/how-to-know-if-a-model-contains-b-rep-or-tessellated-bodies/1502)

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**Author:** [@gabriel.peragine](https://forum.techsoft3d.com/u/gabriel.peragine)\
**Replies:** 0\
**Last updated:** [January 17, 2022, 5:00am UTC](https://forum.techsoft3d.com/t/how-to-know-if-a-model-contains-b-rep-or-tessellated-bodies/1502 "2022-01-17T05:00:00Z")

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CAD files embed two kind of data for the 3D bodies: BRep and Tessellation. A BRep body is described by mathematical parameters and a topology. In order to display a BRep body, HOOPS Exchange evaluate the parameters and …