# Geometric Continuity

[Geometric Continuity] command evaluates the continuity of two curves at their end. The closest points of the two selected curves are the targets to evaluate. On evaluation, the result will be shown on the output window and the command terminates.

## Step 1

For the prompt "Specify the 1st curve", select the 1st curve to evaluate.

## Step 2

For the prompt "Specify the 2nd curve", select the 2nd curve to evaluate.

On the selection of the 2nd, the command will evaluate and output the results on output window. The meaning of each line is:

Continuity

  Continuity of the two curves at their end.

  - `G-1` means discontinuous.

  - `G0` means connected as broken.

  - `G1` means connected with their tangents equivalent.

  - `G2` means connected with their tangents and curvatures equivalent.

Coordinates

  The positions' coordinate values evaluated.

Deviation

  The distance between two end points of the curves evaluated.

Tangent Vector

  The tangent direction at the both ends of the curves evaluated.

Difference

  Angle difference of the above 2 vectors.

Normal

  The normal vectors at the both ends of the curves evaluated.

Difference

  Angle difference of the above 2 vectors.

Curvature

  Curvatures at the both ends of the curves evaluated.

Curvature Radius

  Curvature radius of the both ends of the curves evaluated. When a curvature is zero, zero will be displayed as the radius conventionally.