def _split_arcs_at_point(angle):
segments = deepcopy(sk2_const.STUB_ARCS)
index = _get_arc_index(angle)
if angle in EXTREME_ANGLES:
index += 1
if angle in START_ANGLES: index = 0
points = segments[index:] + segments[:index]
start = bezier_base_point(points[-1])
return [
[start, points, sk2_const.CURVE_CLOSED],
]
else:
points = segments[index + 1:] + segments[:index]
seg_start = bezier_base_point(points[-1])
seg_end = segments[index]
t = 2.0 * (angle - EXTREME_ANGLES[index]) / math.pi
new_point, new_end_point = split_bezier_curve(seg_start, seg_end, t)
new_point[3] = sk2_const.NODE_SMOOTH
new_end_point[3] = sk2_const.NODE_SMOOTH
points[-1][3] = sk2_const.NODE_SMOOTH
start = bezier_base_point(new_point)
return [
[
start, [
new_end_point,
] + points + [
new_point,
], sk2_const.CURVE_CLOSED
],
]
def _split_arcs_at_point(angle): segments = deepcopy(sk2_const.STUB_ARCS) index = _get_arc_index(angle) if angle in EXTREME_ANGLES: if angle in START_ANGLES:index = 0 points = segments[index:] + segments[:index] start = bezier_base_point(points[-1]) return [[start, points, sk2_const.CURVE_CLOSED], ] else: points = segments[index + 1:] + segments[:index] seg_start = bezier_base_point(points[-1]) seg_end = segments[index] t = 2.0 * (angle - EXTREME_ANGLES[index]) / math.pi new_point, new_end_point = split_bezier_curve(seg_start, seg_end, t) new_point[3] = sk2_const.NODE_SMOOTH new_end_point[3] = sk2_const.NODE_SMOOTH points[-1][3] = sk2_const.NODE_SMOOTH start = bezier_base_point(new_point) return [[start, [new_end_point, ] + points + [new_point, ], sk2_const.CURVE_CLOSED], ]
def _exclude_segment_from_arcs(angle1, angle2):
segments = deepcopy(sk2_const.STUB_ARCS)
points = []
start_index = 0
end_index = 0
start_point = None
if angle1 in EXTREME_ANGLES:
start_index = _get_arc_index(angle1) + 1
if angle1 in START_ANGLES: start_index = 0
start_point = bezier_base_point(segments[start_index - 1])
points = segments[start_index:] + segments[:start_index]
else:
start_index = _get_arc_index(angle1)
seg_start = bezier_base_point(segments[start_index - 1])
seg_end = segments[start_index]
t = 2.0 * (angle1 - EXTREME_ANGLES[start_index]) / math.pi
new_point, new_end_point = split_bezier_curve(seg_start, seg_end, t)
new_end_point[3] = sk2_const.NODE_SMOOTH
points = segments[start_index + 1:] + segments[:start_index]
points = [
new_end_point,
] + points + [
new_point,
]
start_point = bezier_base_point(new_point)
if angle2 in EXTREME_ANGLES and angle1 in EXTREME_ANGLES:
end_index = _get_arc_index(angle2) + 1
if angle2 in START_ANGLES: end_index = 0
index = points.index(segments[end_index])
points = points[:index]
elif angle2 in EXTREME_ANGLES and not angle1 in EXTREME_ANGLES:
end_index = _get_arc_index(angle2) + 1
if angle2 in START_ANGLES: end_index = 0
if segments[end_index] in points:
index = points.index(segments[end_index])
else:
index = -1
points = points[:index]
elif not angle2 in EXTREME_ANGLES and angle1 in EXTREME_ANGLES:
end_index = _get_arc_index(angle2)
seg_start = bezier_base_point(segments[end_index - 1])
seg_end = segments[end_index]
t = 2.0 * (angle2 - EXTREME_ANGLES[end_index]) / math.pi
new_point = split_bezier_curve(seg_start, seg_end, t)[0]
index = points.index(segments[end_index])
points = points[:index]
points += [
new_point,
]
else:
end_index = _get_arc_index(angle2)
if not start_index == end_index:
seg_start = bezier_base_point(segments[end_index - 1])
seg_end = segments[end_index]
t = 2.0 * (angle2 - EXTREME_ANGLES[end_index]) / math.pi
new_point = split_bezier_curve(seg_start, seg_end, t)[0]
if segments[end_index] in points:
index = points.index(segments[end_index])
else:
index = -1
points = points[:index]
points += [
new_point,
]
elif angle2 > angle1:
da = angle2 - angle1
t = da / (math.pi / 2.0 - (angle1 - EXTREME_ANGLES[end_index]))
seg_start = start_point
seg_end = points[0]
new_point = split_bezier_curve(seg_start, seg_end, t)[0]
points = [
new_point,
]
else:
da = angle1 - angle2
t = 1.0 - da / (angle1 - EXTREME_ANGLES[end_index])
seg_start = bezier_base_point(points[-2])
seg_end = points[-1]
points[-1] = split_bezier_curve(seg_start, seg_end, t)[0]
return [
[start_point, points, sk2_const.CURVE_CLOSED],
]
def _exclude_segment_from_arcs(angle1, angle2): segments = deepcopy(sk2_const.STUB_ARCS) points = [] start_index = 0 end_index = 0 start_point = None if angle1 in EXTREME_ANGLES: start_index = _get_arc_index(angle1) + 1 if angle1 in START_ANGLES:start_index = 0 start_point = bezier_base_point(segments[start_index - 1]) points = segments[start_index:] + segments[:start_index] else: start_index = _get_arc_index(angle1) seg_start = bezier_base_point(segments[start_index - 1]) seg_end = segments[start_index] t = 2.0 * (angle1 - EXTREME_ANGLES[start_index]) / math.pi new_point, new_end_point = split_bezier_curve(seg_start, seg_end, t) new_end_point[3] = sk2_const.NODE_SMOOTH points = segments[start_index + 1:] + segments[:start_index] points = [new_end_point, ] + points + [new_point, ] start_point = bezier_base_point(new_point) if angle2 in EXTREME_ANGLES and angle1 in EXTREME_ANGLES: end_index = _get_arc_index(angle2) + 1 if angle2 in START_ANGLES:end_index = 0 index = points.index(segments[end_index]) points = points[:index] elif angle2 in EXTREME_ANGLES and not angle1 in EXTREME_ANGLES: end_index = _get_arc_index(angle2) + 1 if angle2 in START_ANGLES:end_index = 0 if segments[end_index] in points: index = points.index(segments[end_index]) else: index = -1 points = points[:index] elif not angle2 in EXTREME_ANGLES and angle1 in EXTREME_ANGLES: end_index = _get_arc_index(angle2) seg_start = bezier_base_point(segments[end_index - 1]) seg_end = segments[end_index] t = 2.0 * (angle2 - EXTREME_ANGLES[end_index]) / math.pi new_point = split_bezier_curve(seg_start, seg_end, t)[0] index = points.index(segments[end_index]) points = points[:index] points += [new_point, ] else: end_index = _get_arc_index(angle2) if not start_index == end_index: seg_start = bezier_base_point(segments[end_index - 1]) seg_end = segments[end_index] t = 2.0 * (angle2 - EXTREME_ANGLES[end_index]) / math.pi new_point = split_bezier_curve(seg_start, seg_end, t)[0] if segments[end_index] in points: index = points.index(segments[end_index]) else: index = -1 points = points[:index] points += [new_point, ] elif angle2 > angle1: da = angle2 - angle1 t = da / (math.pi / 2.0 - (angle1 - EXTREME_ANGLES[end_index])) seg_start = start_point seg_end = points[0] new_point = split_bezier_curve(seg_start, seg_end, t)[0] points = [new_point, ] else: da = angle1 - angle2 t = 1.0 - da / (angle1 - EXTREME_ANGLES[end_index]) seg_start = bezier_base_point(points[-2]) seg_end = points[-1] points[-1] = split_bezier_curve(seg_start, seg_end, t)[0] return [[start_point, points, sk2_const.CURVE_CLOSED], ]
