I need to give the user the option du create a curvedConnection that looks like a three quarter circle.

We also did this for the quarter and semi circle without problems.

Here is what we did to draw the semi circle:

We use the method Graphiti.getPeCreateService().createCurvedConnection(double[] controllPoints, Diagram diagram).

To create the controllPoints we use a simple static method:

public static double[] getControlPointsForSemiCircle(double radius) { double point1X = 0.0; double point1Y = radius / 2; double point2X = 0.25; double point2Y = radius; double point3X = 0.75; double point3Y = radius; double point4X = 1.0; double point4Y = radius / 2; double[] controlPoints = new double[] {point1X, point1Y, point2X, point2Y, point3X, point3Y, point4X, point4Y}; return controlPoints; }

for this curve we create a solid polyline.

The result is as following

I tried some approaches like setting two additional points for the three quarter circle that move the line backwards or the following idea with 4 controllpoints like it would be drawn in a normal coordinate system

public static double[] getControlPointsForThreeQuarterCircle(double radius) { double point1X = 0; // 0 double point1Y = 0; // 0 double point2X = (Math.sqrt(2) * radius) / 100; // 0.5 double point2Y = -Math.sqrt(2) * radius; // -50 double point3X = (Math.round(2 * Math.sqrt(2) * radius)) / 100; // 1.01 double point3Y = 0; double point4X = (Math.sqrt(2) * radius) / 100; // 0.5 double point4Y = Math.sqrt(2) * radius; // 50 double[] controlPoints = new double[] {point1X, point1Y, point2X, point2Y, point3X, point3Y, point4X, point4Y}; return controlPoints; }

What I want is something like that (Hard to draw it in paint but you know what I mean^^)

what I get is always a scary form like that

I think the editor has a hard time to draw in negative x direction. Is there any approach to resolve this issue and draw forms like a three quarter circle?

Thanks for your help. I hope this is the right forum for this topic. Sorry if not :)

greetings Stefan]]>