# Problems with snap tools and circle geometry

**URL:** <https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947>\
**Category:** Modeling Questions\
**Created:** [December 10, 2025, 11:56am UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947 "2025-12-10T11:56:33Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![montecristo](https://avatars.discourse-cdn.com/v4/letter/m/b9e5f3/32.png) [@montecristo](https://discourse.shapr3d.com/u/montecristo)\
**Post date:** [December 10, 2025, 11:56am UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/1 "2025-12-10T11:56:33Z")

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Hello, i am a new customer and i have to express some fillings and problems i had while used your software, so, i had to divide a circle to six parts. I followed a solved topic ( [Dividing circle into 7 equal parts - #4 by Istvan](https://discourse.shapr3d.com/t/dividing-circle-into-7-equal-parts/11660/4) ) but here it is the problems occurred.

While everything looks good in first hand, the polygon doesn’t fit really on the circle. I tried a lot of times even in a new project to test it. I tried making the polygon with the same centre as the circle, and i tried giving manually dimensions, so here it what i discovered, something that never happened to me with Autocad and Sketchup.

1. when you really zoom in to see if the snap tool did its work on intersection or edge of the circle, then you realise that polygons corner doesn’t catch excaclty the point on edge or intersect. In some other points of the circle it looks like good while on others it don’t. If you zoom a little everything it ok, but if you zoom a lot, everything goes crazy, even the line of the parallel goes further than grid lines even the circle appears with a second line around and finaly the corners of the polygons looking out of the snapped lines….
2. Terrifying experience while you are looking for perfect designs. It never happened to me with Autocad to zoom as more as i wanted to see id the lines are connected perfectly. So what now?
3. Also the snap tool is not working fine while passing over lines and circles and grid, cannot check everything, the result is to make your life more difficulty while you trying to catch sketched objects to make the line connections perfect. 4.
4. I cannot copy paste a single box made of lines also, i think same happens with bodies….. It has something like copy command but not paste anywhere…?
5. I am looking all tutorials and topics…

I need solutions here guys, before i change my mind again… I said to give a try to Shapr3d…

 ![polygon in a circle r11 both](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/8/6/86d640e296b1fe7c4df8d3a10f6222df77386951.jpeg)

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [December 10, 2025, 1:03pm UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/2 "2025-12-10T13:03:12Z")

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As for me the easiest way to split the circle is using pattern:

Coincidence constraints can be applied just to be sure everything is snapped:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/c/b/cbb59070dfcda554515ce33eab8e9ff476fd9b10.png)

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**Author:** ![montecristo](https://avatars.discourse-cdn.com/v4/letter/m/b9e5f3/32.png) [@montecristo](https://discourse.shapr3d.com/u/montecristo)\
**Post date:** [December 10, 2025, 1:42pm UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/3 "2025-12-10T13:42:38Z")

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Ok my friend. The problem with misalignment is the same. I don’t know if it as a bug or something else but it shouldn’t happened. So this is a video ([https://youtu.be/NFKCeKfR758](https://youtu.be/NFKCeKfR758)) trying your way. Looking for confirm that the line is indeed on circle i am zooming in and everything is a mess while zooming, same thing will happen if i put the mm of the line to be exact the same with the rad of circle starting from centre of circle, even if i choose out of grid the auto snap “edge” on circle it will be the same results….. Unacceptable if you are coming from a cad world and you never saw something like this.

 ![circle r22 with paterns](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/e/4/e46fe90aceb5729fb5fb189992c5b7aa99413af3.jpeg)

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**Author:** ![montecristo](https://avatars.discourse-cdn.com/v4/letter/m/b9e5f3/32.png) [@montecristo](https://discourse.shapr3d.com/u/montecristo)\
**Post date:** [December 10, 2025, 1:43pm UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/4 "2025-12-10T13:43:21Z")

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![circle r22 with paterns without zoom](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/f/a/fad312453027f50ef6948e5745c98eea126ae233.jpeg)

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [December 10, 2025, 1:46pm UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/5 "2025-12-10T13:46:28Z")

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> [@montecristo](#):
>
> The problem with misalignment is the same. I don’t know if it as a bur or something else but it shouldn’t happened.

That’s just a rendering issue (not a math issue). For some reason the S3D team either can’t or doesn’t want to fix it. I’m sure someone has already written about this here.

Everything is snapped correctly under the hood, but you still see these issues during visualization.

* * *

Another problem is the limited precision — the system can’t handle values below 0.0001.

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**Author:** ![montecristo](https://avatars.discourse-cdn.com/v4/letter/m/b9e5f3/32.png) [@montecristo](https://discourse.shapr3d.com/u/montecristo)\
**Post date:** [December 10, 2025, 1:57pm UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/6 "2025-12-10T13:57:06Z")

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autocad 2000 and sketchup 2018 doesn’t do this…. Autocad 2000…. 25 years ago.

I am not sure if it a render issue… Shapr3d must see that very serious and prove if it only a render issue. Do you have proves that is only a render issue and it doesn’t affect the hole draw in time? I cannot trust the program right now.

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [December 11, 2025, 12:17am UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/7 "2025-12-11T00:17:06Z")

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> [@montecristo](#):
>
> I cannot trust the program right now.

That’s your choice. This visual issue doesn’t cause any problems for me.

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**Author:** ![montecristo](https://avatars.discourse-cdn.com/v4/letter/m/b9e5f3/32.png) [@montecristo](https://discourse.shapr3d.com/u/montecristo)\
**Post date:** [December 11, 2025, 1:04pm UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/8 "2025-12-11T13:04:53Z")

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Are you working for Shapr3D ?

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [December 11, 2025, 3:52pm UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/9 "2025-12-11T15:52:53Z")

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No, I’m just a hobbyist 🙂

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<div class="post-metadata">

**Author:** ![montecristo](https://avatars.discourse-cdn.com/v4/letter/m/b9e5f3/32.png) [@montecristo](https://discourse.shapr3d.com/u/montecristo)\
**Post date:** [December 11, 2025, 11:06pm UTC](https://discourse.shapr3d.com/t/problems-with-snap-tools-and-circle-geometry/39947/10 "2025-12-11T23:06:22Z")

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Thank you very much your answers. I appreciate that.