Change Details

**System Information** Operating system: Linux-5.11.16-2-MANJARO-x86_64-with-glibc2.33 64 Bits Graphics card: Mesa DRI Intel(R) HD Graphics 4600 (HSW GT2) Intel Open Source Technology Center 4.5 (Core Profile) Mesa 21.0.3 **Blender Version** Broken: version: 2.93.0 Beta, branch: master, commit date: 2021-04-23 20:24, hash: `rBaa95f8019e42` Worked: (newest version of Blender that worked as expected) **Short description of error** Operation which creation of circles such as `Add->Mesh->Circle`, `Add->Mesh->Cylinder` after applying have asymmetric position of vertices, which can give unexpected results such as Boolean operation with the selected Exact method. I created two circles - `A` and `B`. Circle `A` was created from menu `Add->Mesh->Circle` with radius equals 50 mm. You can see on image that parallel vertices top and bottom has asymmetric position. Also, the asymmetric arrangement of the vertices gives different lengths between the parallel vertices, which indicates that the circle has non-symmetrical edges. It shown on next image. Additionally, for comparison I created second circle `B` from one quarter of circle and mirrored by `X` and `Y` axes for symmetric. Circle `B` has symmetric position of vertices and also symmetric edges and correct radius. {F10035319} {F10035322} This issue can affect in boolean operations with Exact option and give unexpected result when parts of meshes arrange symmetric, for example: {F10035324} {F10035326} {F10035328} However, I noticed that the inaccuracy can see in the millimeters system of measurement. If you switch to another system asymmetric values you don't see it but the issue will remain. What units use inside Blender, in millimeters system? **Exact steps for others to reproduce the error**

**System Information** Operating system: Linux-5.11.16-2-MANJARO-x86_64-with-glibc2.33 64 Bits Graphics card: Mesa DRI Intel(R) HD Graphics 4600 (HSW GT2) Intel Open Source Technology Center 4.5 (Core Profile) Mesa 21.0.3 **Blender Version** Broken: version: 2.93.0 Beta, branch: master, commit date: 2021-04-23 20:24, hash: `rBaa95f8019e42` Worked: (newest version of Blender that worked as expected) **Short description of error** Operation which creation of circles such as `Add->Mesh->Circle`, `Add->Mesh->Cylinder` after applying have asymmetric position of vertices, which can give unexpected results such as Boolean operation with the selected Exact method. I created two circles - `A` and `B`. Circle `A` was created from menu `Add->Mesh->Circle` with radius equals 50 mm. You can see on image that parallel vertices top and bottom has asymmetric position. Also, the asymmetric arrangement of the vertices gives different lengths between the parallel vertices, which indicates that the circle has non-symmetrical edges. It shown on next image. Additionally, for comparison I created second circle `B` from one quarter of circle and mirrored by `X` and `Y` axes for symmetric. Circle `B` has symmetric position of vertices and also symmetric edges and correct radius. {F10035319} {F10035322} This issue can affect in boolean operations with Exact option and give unexpected result when parts of meshes arrange symmetric, for example: {F10035324} {F10035326} {F10035328} However, I noticed that the inaccuracy can see when use the millimeters system of measurement. If you switch to another system, asymmetric values you don't see but the issue will remain. What units use for calculates inside Blender? **Exact steps for others to reproduce the error**

**System Information** Operating system: Linux-5.11.16-2-MANJARO-x86_64-with-glibc2.33 64 Bits Graphics card: Mesa DRI Intel(R) HD Graphics 4600 (HSW GT2) Intel Open Source Technology Center 4.5 (Core Profile) Mesa 21.0.3 **Blender Version** Broken: version: 2.93.0 Beta, branch: master, commit date: 2021-04-23 20:24, hash: `rBaa95f8019e42` Worked: (newest version of Blender that worked as expected) **Short description of error** Operation which creation of circles such as `Add->Mesh->Circle`, `Add->Mesh->Cylinder` after applying have asymmetric position of vertices, which can give unexpected results such as Boolean operation with the selected Exact method. I created two circles - `A` and `B`. Circle `A` was created from menu `Add->Mesh->Circle` with radius equals 50 mm. You can see on image that parallel vertices top and bottom has asymmetric position. Also, the asymmetric arrangement of the vertices gives different lengths between the parallel vertices, which indicates that the circle has non-symmetrical edges. It shown on next image. Additionally, for comparison I created second circle `B` from one quarter of circle and mirrored by `X` and `Y` axes for symmetric. Circle `B` has symmetric position of vertices and also symmetric edges and correct radius. {F10035319} {F10035322} This issue can affect in boolean operations with Exact option and give unexpected result when parts of meshes arrange symmetric, for example: {F10035324} {F10035326} {F10035328} However, I noticed that the inaccuracy can see inwhen use the millimeters system of measurement. If you switch to another system asymmetric values you don't see it but the issue will remain., What units use inside Blender,asymmetric values you don't see but the issue will remain. in millimeters systemWhat units use for calculates inside Blender? **Exact steps for others to reproduce the error**