Declaration

TArrowHeadAbstract = class
protected
  function GetPointsInternal: TArrayOfFloatPoint; virtual; abstract;
public
  constructor Create(Size: TFloat); virtual;
  function GetPoints(const Line: TArrayOfFloatPoint; AtEnd: Boolean): TArrayOfFloatPoint;
  property Size: TFloat read FSize write FSize;
end;

Description

TArrowHeadAbstract serves as the abstract base class for vector arrowhead generators in Graphics32. It handles the alignment, vector scaling, and position calculation required to place an arrowhead shape at either the start or end point of a line or polyline.

Derived classes override the protected GetPointsInternal method to compute the shape points based on the tip and base points determined by GetPoints.