---
title: "Options"
url: "https://help.maxon.net/c4d/en-us/Content/html/TOOLFITCIRCLE-MDATA_MAINGROUP.html"
section_path: "Mesh Menu > Fit Circle > Options"
element_id: "TOOLFITCIRCLE"
group_id: "MDATA_MAINGROUP"
description: "Here you can define a stepless transition of the original selection (0%) to - most often - a circular result (100%)."
---

## Options

### Strength

Parameter ID: `MDATA_FITCIRCLE_WEIGHT` · Range: [0..100%]

Here you can define a stepless transition of the original selection (0%) to - most often - a circular result (100%).

### Roundness

Parameter ID: `MDATA_FITCIRCLE_ROUNDNESS` · Range: [0..100%]

Here you can define a stepless adaption of the selected elements to a circular shape.

### Exact Radius

Parameter ID: `MDATA_FITCIRCLE_ABSOLUTERADIUS`

### Scale

Parameter ID: `MDATA_FITCIRCLE_SCALE` · Range: [0..+∞%]

### Radius

Parameter ID: `MDATA_FITCIRCLE_RADIUS` · Range: [0..+∞m]

The circular shape to be approximated has a **Radius** at **Strength** = 100%, which either has an absolute value (option enabled) or a percentage value **Size**, which is initially assumed to be 100% but can then be set as desired.

### Angle

Parameter ID: `MDATA_FITCIRCLE_ANGLE` · Range: [-∞..+∞°]

The circle shape can be rotated interactively at any time either here or with Shift to optimize the alignment.

### Adjust Inner Points

Parameter ID: `MDATA_FITCIRCLE_ADJUSTINNERPOINTS`

If you encounter cases where points within the circular shape extend beyond it (left), activate this option (right):

![Image: R26_fitcircle2.png](https://help.maxon.net/c4d/en-us/Content/Resources/Images/R26_fitcircle2.png)

The inner points will then be evenly adjusted.

### Project To Surface

Parameter ID: `MDATA_FITCIRCLE_PROJECTTOSURFACE`

![Image: R26_flattened.png](https://help.maxon.net/c4d/en-us/Content/Resources/Images/R26_flattened.png)\
On the left the selected initial position, at the center **Project Onto Surface** activated, on the right deactivated.

If **Project** **Onto Surface** is enabled, the points will be projected to the closest point of the original mesh, keeping the original shape as closely as possible.

Quite different if the option is disabled: here the selection is placed on a layer defined by itself. The result is a level or flat selection.

### Equal Spacing

Parameter ID: `MDATA_FITCIRCLE_PROJECTREGULAR`

![Image: R26_equal.png](https://help.maxon.net/c4d/en-us/Content/Resources/Images/R26_equal.png)\
On the left the selected initial position, in the middle Equal Spacing disabled, on the right enabled.

### Select Outline

Parameter ID: `MDATA_FITCIRCLE_SELECTOUTLINE`

If you work in polygon mode and then switch to edge mode, this option decides whether the selection outline should be selected in edge mode.