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Bisects an angle: vertex + two arms (points, or segments/rays/lines).

Two lines with no vertex bisect their crossing. 'Only Ray' toggle outputs a ray from the vertex instead of a full line.

Category: Construct | Add menu: Construct > Angle Bisector

• Vertex (point): the corner point the bisector sits at (ignored in the two-line form).
• Arm 1 (any): the first arm, as a point or as a line/ray/segment.
• Arm 2 (any): the second arm, as a point or as a line/ray/segment.
• Side (on/off): which side of the arms the bisector is taken on when the two-line form is ambiguous.
• Only Ray (on/off): output a forward ray from the vertex instead of a full line.

• Line (curve): the bisecting line (or ray, with Only Ray on).

Arm 1 and Arm 2 are typed any, and the node has two forms depending on what they are:

• Two points + a Vertex: the bisector sits at the Vertex, splitting the angle between the Vertex->Arm 1 and Vertex->Arm 2 directions. (Point lists pair index-for-index.)
• Two lines / rays / segments, with no Vertex: the bisector runs through the two lines' crossing; the Vertex input is ignored. (Parallel lines bisect to the line midway between them.)
• Mixed: one line arm and one point arm, with a Vertex - each arm contributes a direction outward from the Vertex, and the bisector sits at the Vertex.

Turn on Only Ray to emit a ray from the anchor instead of a full line.

< Previous: Perpendicular Bisector | Next: Tangent >

• In the modeling view: Line: Angle Bisector - construct the same angle bisector directly on the canvas.