How can i add arc at CGPathGetCurrentPoint?

Question

I am drawing Donut Chart.I am using CGPath to draw and after drawing adding it to CAShapeLayer. First I draw an outer arc and then draw line toward centre, now I want to add arc to my current point.

Screenshot of this is below.

See smaller arc should be at the end of line.

My code,

for (int j = 0; j < numSubject; j++) {
            int valueForSubject = [datasource valueOfSubjectAtIndex:j andLevel:i inDonutChartView:self];
            endAngle =  [self angleInRadianFromSubjectValue:valueForSubject];
            DLog(@"Angle - %f",RADIANS_TO_DEGREES(endAngle))
            //path
            CGMutablePathRef path = CGPathCreateMutable();
            CGPathAddArc(path, NULL, prevPoint.x, prevPoint.y, radius, startAngle, endAngle, NO);
            CGPoint currentPoint = CGPathGetCurrentPoint(path);
            //find angles from start point to center and end point to center
            CGFloat angle1 = [self angleFromFirstPoint:prevPoint secondPoint:centerPoint];
            CGFloat angle2 = [self angleFromFirstPoint:CGPathGetCurrentPoint(path) secondPoint:centerPoint];
            double endX1 = cos(angle1) * LEVEL_WIDTH + prevPoint.x;
            double endY1 = sin(angle1) * LEVEL_WIDTH + prevPoint.y;

            double endX2 = cos(angle2) * LEVEL_WIDTH + CGPathGetCurrentPoint(path).x;
            double endY2 = sin(angle2) * LEVEL_WIDTH + CGPathGetCurrentPoint(path).y;

            //first connect current point to end2 point then draw arc and then connect to end1
            CGPathAddLineToPoint(path, NULL, endX2, endY2);
            //CGPathAddArcToPoint(path, NULL, CGPathGetCurrentPoint(path).x, CGPathGetCurrentPoint(path).y, endX2, endY2, radius - LEVEL_WIDTH);
            CGPathAddArc(path, NULL, CGPathGetCurrentPoint(path).x , CGPathGetCurrentPoint(path).y, radius - LEVEL_WIDTH, endAngle, startAngle, YES);

            //CGPathAddLineToPoint(path, NULL, endX1, endY1);

            //CGPathCloseSubpath(path);
            A3DonutChartShapeLayer* arcLayer = [[A3DonutChartShapeLayer alloc]init];
            arcLayer.path = path;
            //arcLayer.frame = CGPathGetBoundingBox(path);
            arcLayer.lineWidth = BORDER_WIDTH;
            arcLayer.strokeColor = [UIColor blackColor].CGColor;
            arcLayer.fillColor = [UIColor clearColor].CGColor;
            [self.layer addSublayer:arcLayer];

Any pointers?

Answer 1

here it is:

CGMutablePathRef path = CGPathCreateMutable();
CGPathAddArc(path, NULL, rect.size.width/2, rect.size.height/2, 100, startAngle, endAngle, NO);
CGPathAddArc(path, NULL, rect.size.width/2, rect.size.height/2, 100-50, endAngle, startAngle, YES);
CGPathCloseSubpath(path);