arrow_head_points: Calculate Arrow Head Points
Description
Returns the vertices for an arrow head polygon without drawing.
Usage
arrow_head_points(x, y, angle, size, arrow_angle = pi/6)
Value
List with x, y vectors and midpoint coordinates.
Arguments
- x
Arrow tip x coordinate.
- y
Arrow tip y coordinate.
- angle
Angle of incoming edge (radians).
- size
Arrow size.
- arrow_angle
Arrow head angle in radians. Default pi/6 (30 degrees).