- (CGRect)addPathPreviousPreviousPoint:(CGPoint)p2Point withPreviousPoint:(CGPoint)p1Point withCurrentPoint:(CGPoint)cpoint {

CGPoint mid1 = midPoint(p1Point, p2Point);
CGPoint mid2 = midPoint(cpoint, p1Point);
CGMutablePathRef subpath = CGPathCreateMutable();
CGPathMoveToPoint(subpath, NULL, mid1.x, mid1.y);
CGPathAddQuadCurveToPoint(subpath, NULL, p1Point.x, p1Point.y, mid2.x, mid2.y);
CGRect bounds = CGPathGetBoundingBox(subpath);

CGPathAddPath(path, NULL, subpath);
CGPathRelease(subpath);

return bounds;
}

- (void)draw
{
CGContextRef context = UIGraphicsGetCurrentContext();

CGContextAddPath(context, path);
CGContextSetLineCap(context, kCGLineCapRound);
CGContextSetLineWidth(context, self.lineWidth);
CGContextSetStrokeColorWithColor(context, self.lineColor.CGColor);
CGContextSetBlendMode(context, kCGBlendModeNormal);
CGContextSetAlpha(context, self.lineAlpha);
CGContextStrokePath(context);
}