pointPen.py 文件源码

def _flushContour(self):
        points = self._points
        nPoints = len(points)
        if not nPoints:
            return
        if points[0][1] == "move":
            # Open path.
            indices = range(1, nPoints - 1)
        elif nPoints > 1:
            # Closed path. To avoid having to mod the contour index, we
            # simply abuse Python's negative index feature, and start at -1
            indices = range(-1, nPoints - 1)
        else:
            # closed path containing 1 point (!), ignore.
            indices = []
        for i in indices:
            pt, segmentType, dummy, name, kwargs = points[i]
            if segmentType is None:
                continue
            prev = i - 1
            next = i + 1
            if points[prev][1] is not None and points[next][1] is not None:
                continue
            # At least one of our neighbors is an off-curve point
            pt = points[i][0]
            prevPt = points[prev][0]
            nextPt = points[next][0]
            if pt != prevPt and pt != nextPt:
                dx1, dy1 = pt[0] - prevPt[0], pt[1] - prevPt[1]
                dx2, dy2 = nextPt[0] - pt[0], nextPt[1] - pt[1]
                a1 = math.atan2(dx1, dy1)
                a2 = math.atan2(dx2, dy2)
                if abs(a1 - a2) < 0.05:
                    points[i] = pt, segmentType, True, name, kwargs

        for pt, segmentType, smooth, name, kwargs in points:
            self._outPen.addPoint(pt, segmentType, smooth, name, **kwargs)