Function arrow1

arrow1(start: Vector2, end: Vector2, headsize?: number): Diagram
Create an arrow from a given point to another given point
Parameters
- start: Vector2
  the start point of the arrow
- end: Vector2
  the end point of the arrow
- headsize: number = 1
  size of the arrow head
Returns Diagram
a Diagram object
- Defined in shapes.ts:117