def _arc_arc_intersection(ipts, arc1, arc2):
    _cp1 = arc1.getCenter()
    _r1 = arc1.getRadius()
    _tempcirc1 = circle.Circle(_cp1, _r1)
    _cp2 = arc2.getCenter()
    _r2 = arc2.getRadius()
    _tempcirc2 = circle.Circle(_cp2, _r2)
    _ipts = []
    _circ_circ_intersection(_ipts, _tempcirc1, _tempcirc2)
    if len(_ipts):  # may have intersection points ...
        for _ip in _ipts:
            _cx, _cy = _cp1.getCoords()
            _x, _y = _ip
            _angle = math.atan2((_y - _cy), (_x - _cx)) * _rtd
            if _angle < 0.0:
                _angle = _angle + 360.0
            if arc1.throughAngle(_angle):
                _cx, _cy = _cp2.getCoords()
                _angle = math.atan2((_y - _cy), (_x - _cx)) * _rtd
                if _angle < 0.0:
                    _angle = _angle + 360.0
                if arc2.throughAngle(_angle):
                    ipts.append(_ip)
    _tempcirc1.finish()
    _tempcirc2.finish()
def _arc_cl_intersection(ipts, obja, objb):
    if isinstance(obja, arc.Arc):
        _arc = obja
        _cl = objb
    else:
        _arc = objb
        _cl = obja
    _cp = _arc.getCenter()
    _r = _arc.getRadius()
    _tempcirc = circle.Circle(_cp, _r)
    _ipts = []
    _circ_cl_intersection(_ipts, _tempcirc, _cl)
    if len(_ipts):  # may have intersection points ...
        _cx, _cy = _cp.getCoords()
        for _ip in _ipts:
            _x, _y = _ip
            _angle = math.atan2((_y - _cy), (_x - _cx)) * _rtd
            if _angle < 0.0:
                _angle = _angle + 360.0
            if _arc.throughAngle(_angle):
                ipts.append(_ip)
    _tempcirc.finish()
Esempio n. 3
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def hatchtests():
    p1 = point.Point(0, 0)
    p2 = point.Point(10, 0)
    p3 = point.Point(10, 10)
    p4 = point.Point(0, 10)
    s1 = segment.Segment(p1, p2)
    s2 = segment.Segment(p2, p3)
    s3 = segment.Segment(p3, p4)
    s4 = segment.Segment(p4, p1)
    l1 = layer.Layer('foo')
    l1.addObject(p1)
    l1.addObject(p2)
    l1.addObject(p3)
    l1.addObject(p4)
    l1.addObject(s1)
    l1.addObject(s2)
    l1.addObject(s3)
    l1.addObject(s4)
    # find_hatched_area(l1, hpx, hpy)
    p5 = point.Point(2.95, 3.95)
    l1.addObject(p5)
    c1 = circle.Circle(p5, 1)
    l1.addObject(c1)