DLI Implementation and Reference Guide - Datalogics

Working with Content 8.15
same angle, a full circle will be drawn. The position following this command will be
the specified position.
dlpdfpathaddelliparcto
This method accepts seven parameters:
• The first is a pointer to the path.
• The second is the Xposition of the intersection of tangents.
• The third is the Yposition of the intersection of tangents.
• The fourth is the Xposition of a point defining the second tangent.
• The fifth is the Yposition of a point defining the second tangent.
• The sixth is the horizontal radius (HRad) of the arc.
• The seventh is the vertical radius (VRad) of the arc.
The HRad and VRad support drawing elliptical arc segments. The two lines
(CurrX,CurrY)->(X1,Y1) and (X2,Y2)->(X1,Y1) are joined by an arc of radius (R).
The line segment from the current position to the start of the arc is drawn, followed
by the arc itself. The line segment from the end of the arc to the point X2,Y2 is not
drawn.
The position following this command will be the intersection of the arc with the line
(X2,Y2)->(X1,Y1). If the two lines are colinear, a straight line segment is drawn from
the current position to (X1,Y1), which then becomes the current point.
dlpdfpathaddcurve
This method accepts seven parameters:
• The first is a pointer to a path.
• The second and third are the X and Y positions of a point which will be Control
Point 1.
• The fourth and fifth are the X and Y positions of a point which will be Control
Point 2.
• The sixth and seventh are the X and Y positions of a point which will be the end
point of the curve.
A smooth curve (a cubic Bézier) will be drawn from the current position to the end
position, under direction of the two control points. The current position will be the