# \#polygon

**URL:** https://discourse.threejs.org/tag/polygon/557.md

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## [Merge or group the triangles of model which have close normal and compute edge](https://discourse.threejs.org/t/merge-or-group-the-triangles-of-model-which-have-close-normal-and-compute-edge/51717)

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**Author:** [@carson](https://discourse.threejs.org/u/carson)\
**Replies:** 3\
**Last updated:** [September 12, 2024, 3:15pm UTC](https://discourse.threejs.org/t/merge-or-group-the-triangles-of-model-which-have-close-normal-and-compute-edge/51717 "2024-09-12T15:15:43Z")

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Hi guys,I wanna handle the model geometry in order to select the region of irregular Polygons. In other application like blender and visiual component, they can merge faces and compute edge. So I can select the region i…

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## [The polygon offset is not correct when viewed from the front](https://discourse.threejs.org/t/the-polygon-offset-is-not-correct-when-viewed-from-the-front/57631)

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**Author:** [@y\_nozaki](https://discourse.threejs.org/u/y_nozaki)\
**Replies:** 2\
**Last updated:** [February 2, 2024, 12:50pm UTC](https://discourse.threejs.org/t/the-polygon-offset-is-not-correct-when-viewed-from-the-front/57631 "2024-02-02T12:50:20Z")

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Hi, I use the polygon offset to resolve z-fighting. However, the polygon offset is not correct when viewed from the front. Is there a solution to this problem? The camera uses orthographic projection. const chip = R…

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## [How to know the number of points overlap the polygon?](https://discourse.threejs.org/t/how-to-know-the-number-of-points-overlap-the-polygon/21346)

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**Author:** [@kunyao](https://discourse.threejs.org/u/kunyao)\
**Replies:** 0\
**Last updated:** [December 8, 2020, 10:23am UTC](https://discourse.threejs.org/t/how-to-know-the-number-of-points-overlap-the-polygon/21346 "2020-12-08T10:23:27Z")

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Hello, In my scene, it with points and polygon, when the mouse points out the place with both overlap, a panel will popped-up and shows the information according to the userdata array comes from the object. My questi…

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## [Swinging Polygon](https://discourse.threejs.org/t/swinging-polygon/5509)

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**Author:** [@hofk](https://discourse.threejs.org/u/hofk)\
**Replies:** 0\
**Last updated:** [December 27, 2018, 7:41pm UTC](https://discourse.threejs.org/t/swinging-polygon/5509 "2018-12-27T19:41:11Z")

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With reference to https://discourse.threejs.org/t/problems-with-creating-custom-polyhedron-geometry/5412/47 and questions about it, I have created a simple example for oscillating the edges of a polygon. This approach…