fix: correctly determine arc start/end points #16

src/board.spec.ts

@@ -104,6 +104,15 @@ describe('convertArc', () => {
       '(gr_arc (start 0.465 2.978) (end -5.746 6.659) (angle 358.992) (width 0.152) (layer "B.SilkS"))'
     );
   });
+
+  it('should correctly determine the arc start and end point (issue #16)', () => {
+    const arc = 'ARC~1~1~S$9~M4262.5,3279.5 A33.5596,33.5596 0 0 0 4245.5921,3315.5816~~gge8~0'
+      .split('~')
+      .slice(1);
+    expect(encodeObject(convertArc(arc))).toEqual(
+      '(gr_arc (start 70.739 78.486) (end 62.38 80.158) (angle 72.836) (width 0.254) (layer "F.Cu"))'
+    );
+  });
 });
 
 describe('convertCopperArea', () => {

src/board.ts

@@ -213,10 +213,11 @@ export function convertArc(args: string[], objName = 'gr_arc', transform?: IPare
     end.x,
     end.y
   );
+  const endPoint = sweep === '1' ? start : end;
   return [
     objName,
     ['start', cx, cy], // actually center
-    ['end', start.x, start.y],
+    ['end', endPoint.x, endPoint.y],
     ['angle', Math.abs(extent)],
     ['width', kiUnits(width)],
     ['layer', getLayerName(layer)]