Circle Fit

Functionality

This node tries to approximate the provided set of vertices by a circle (i.e., fit a circle through given set of vertices). It searches for such a circle, that all provided vertices have minimum distance to it.

The circle is represented by it’s center, it’s radius, and a normal of a plane it is lying in.

For this node to work correctly, it needs at least 3 vertices on the input.

Inputs

This node has the following input:

• Vertices - the vertices to be approximated with a circle.

Outputs

This node has the following outputs:

• Center - the center of the circle.

• Radius - the radius of the circle.

• Normal - normal of the plane to which the circle belongs.

• Matrix - matrix mapping to the circle local coordinates; Z axis of this matrix is parallel to the normal vector of the plane.

• Projections - projections of the input vertices to the circle.

• Diffs - difference vectors, i.e. vectors pointing from original vertices to their projections to the circle.

• Distances - distances from the original vertices to the circle.

Examples of usage

Fit a circle for vertices from arbitrary mesh object:

• Generator-> Circle

• Generator-> NGon

• Transform-> Rotate

• Transform-> Noise Displace

• Matrix-> Matrix In

• Viz-> Viewer Draw