def tr_arc(self, chunk, arc_type=sk2const.ARC_ARC):
ye, xe, ys, xs, bottom, right, top, left = get_data('<hhhhhhhh', chunk)
left, top = apply_trafo_to_point([left, top], self.get_trafo())
right, bottom = apply_trafo_to_point([right, bottom], self.get_trafo())
xs, ys = apply_trafo_to_point([xs, ys], self.get_trafo())
xe, ye = apply_trafo_to_point([xe, ye], self.get_trafo())
if left != right and top != bottom:
t = [(right - left) / 2, 0, 0, (bottom - top) / 2,
(right + left) / 2, (top + bottom) / 2]
t = libgeom.invert_trafo(t)
xs, ys = apply_trafo_to_point([xs, ys], t)
xe, ye = apply_trafo_to_point([xe, ye], t)
end_angle = libgeom.get_point_angle([xs, ys], [0.0, 0.0])
start_angle = libgeom.get_point_angle([xe, ye], [0.0, 0.0])
else:
start_angle = end_angle = 0.0
cfg = self.layer.config
sk2_style = self.get_style()
if arc_type == sk2const.ARC_ARC:
sk2_style[0] = []
rect = [left, top, right - left, bottom - top]
ellipse = sk2_model.Circle(cfg, self.layer, rect, start_angle,
end_angle, arc_type, sk2_style)
self.layer.childs.append(ellipse)
def tr_arc(self, chunk, arc_type=sk2_const.ARC_ARC):
ye, xe, ys, xs, bottom, right, top, left = get_data('<hhhhhhhh',
chunk)
left, top = apply_trafo_to_point([left, top], self.get_trafo())
right, bottom = apply_trafo_to_point([right, bottom], self.get_trafo())
xs, ys = apply_trafo_to_point([xs, ys], self.get_trafo())
xe, ye = apply_trafo_to_point([xe, ye], self.get_trafo())
if left != right and top != bottom:
t = [(right - left) / 2, 0, 0, (bottom - top) / 2,
(right + left) / 2, (top + bottom) / 2]
t = libgeom.invert_trafo(t)
xs, ys = apply_trafo_to_point([xs, ys], t)
xe, ye = apply_trafo_to_point([xe, ye], t)
end_angle = libgeom.get_point_angle([xs, ys], [0.0, 0.0])
start_angle = libgeom.get_point_angle([xe, ye], [0.0, 0.0])
else:
start_angle = end_angle = 0.0
cfg = self.layer.config
sk2_style = self.get_style()
if arc_type == sk2_const.ARC_ARC: sk2_style[0] = []
rect = [left, top, right - left, bottom - top]
ellipse = sk2_model.Circle(cfg, self.layer, rect, start_angle,
end_angle, arc_type, sk2_style)
self.layer.childs.append(ellipse)
def _circular_arc_3_point_close(self, element):
p1, chunk = self.read_point(element.params)
p2, chunk = self.read_point(chunk)
p3, chunk = self.read_point(chunk)
flag = self.read_enum(chunk)[0]
p1, p2, p3 = libgeom.apply_trafo_to_points([p1, p2, p3],
self.get_trafo())
center = libgeom.circle_center_by_3points(p1, p2, p3)
if not center:
return
r = libgeom.distance(center, p1)
angle1 = libgeom.get_point_angle(p3, center)
angle2 = libgeom.get_point_angle(p1, center)
x, y = center
rect = [x - r, y - r, 2 * r, 2 * r]
flag = {
0: sk2const.ARC_PIE_SLICE,
1: sk2const.ARC_CHORD
}.get(flag, sk2const.ARC_CHORD)
circle = sk2_model.Circle(self.layer.config,
self.layer,
rect,
angle1=angle1,
angle2=angle2,
circle_type=flag,
style=self.get_style(fill=True))
self.layer.childs.append(circle)
def update_arrows(self):
self.cache_arrows = []
if self.is_curve and self.style[1]:
stroke = self.style[1]
arrs = stroke[9]
if not arrs:
return
for path in self.paths:
if path[-1] == sk2const.CURVE_CLOSED:
self.cache_arrows.append([])
continue
tr = libgeom.multiply_trafo
coef = self.cache_line_width
end = start = None
stroke_trafo = [coef, 0.0, 0.0, coef, 0.0, 0.0]
def get_vector(path, trafo):
p0 = p1 = path[0]
is_cp = libgeom.is_curve_point
t = 0.001
for point in path[1]:
p0 = point[0] if is_cp(point) else point
if not p0 == p1:
break
elif is_cp(point) and p1 != point[2]:
p0 = libgeom.split_bezier_curve(p1, point, t)[0][2]
break
return [
libgeom.apply_trafo_to_point(p, trafo)
for p in (p0, p1)
]
# end arrow
if isinstance(arrs[0], int):
p0, p1 = get_vector(path, self.trafo)
angle = libgeom.get_point_angle(p1, p0)
end_trafo = tr(stroke_trafo, libgeom.trafo_rotate(angle))
trafo = [1.0, 0.0, 0.0, 1.0, p1[0], p1[1]]
end_trafo = tr(end_trafo, trafo)
end = arrows.get_arrow_cpath(arrs[0], end_trafo)
# start arrow
if isinstance(arrs[1], int):
p0, p1 = get_vector(libgeom.reverse_path(path), self.trafo)
angle = libgeom.get_point_angle(p1, p0)
start_trafo = tr(stroke_trafo, libgeom.trafo_rotate(angle))
trafo = [1.0, 0.0, 0.0, 1.0, p1[0], p1[1]]
start_trafo = tr(start_trafo, trafo)
start = arrows.get_arrow_cpath(arrs[1], start_trafo)
self.cache_arrows.append([end, start])
def translate_arc(self, obj, cfg):
cx = obj.center_x
cy = obj.center_y
r = libgeom.distance((cx, cy), (obj.x1, obj.y1))
end_angle = libgeom.get_point_angle((obj.x1, obj.y1), (cx, cy))
start_angle = libgeom.get_point_angle((obj.x3, obj.y3), (cx, cy))
if not obj.direction:
start_angle, end_angle = end_angle, start_angle
circle_type = FIG_TO_SK2_ARC.get(obj.sub_type, sk2const.ARC_PIE_SLICE)
props = dict(circle_type=circle_type,
rect=[cx - r, cy - r, 2.0 * r, 2.0 * r],
style=self.get_style(obj),
angle1=start_angle,
angle2=end_angle)
new_obj = sk2_model.Circle(cfg, **props)
new_obj.trafo = libgeom.multiply_trafo(new_obj.trafo, self.trafo)
return new_obj
def _circular_arc_centre(self, element):
center, chunk = self.read_point(element.params)
p1, chunk = self.read_point(chunk)
p2, chunk = self.read_point(chunk)
center, p1, p2 = libgeom.apply_trafo_to_points(
[center, p1, p2], self.get_trafo())
r = self.read_vdc(chunk)[0] * self.scale
angle1 = libgeom.get_point_angle(p1, center)
angle2 = libgeom.get_point_angle(p2, center)
x, y = center
rect = [x - r, y - r, 2 * r, 2 * r]
circle = sk2_model.Circle(self.layer.config, self.layer, rect,
angle1=angle1,
angle2=angle2,
circle_type=sk2const.ARC_ARC,
style=self.get_style(stroke=True))
self.layer.childs.append(circle)
def update_arrows(self):
self.cache_arrows = []
if self.is_curve and self.style[1]:
stroke = self.style[1]
arrs = stroke[9]
if not arrs:
return
for path in self.paths:
if path[-1] == sk2const.CURVE_CLOSED:
self.cache_arrows.append([])
continue
tr = libgeom.multiply_trafo
coef = self.cache_line_width
end = start = None
# end arrow
if isinstance(arrs[0], int):
end_trafo = [coef, 0.0, 0.0, coef, 0.0, 0.0]
p1 = libgeom.apply_trafo_to_point(path[0], self.trafo)
p0 = libgeom.apply_trafo_to_point(path[1][0], self.trafo)
if libgeom.is_curve_point(p0):
p0 = p0[0]
angle = libgeom.get_point_angle(p1, p0)
end_trafo = tr(end_trafo, libgeom.trafo_rotate(angle))
trafo = [1.0, 0.0, 0.0, 1.0, p1[0], p1[1]]
end_trafo = tr(end_trafo, trafo)
end = arrows.get_arrow_cpath(arrs[0], end_trafo)
#start arrow
if isinstance(arrs[1], int):
start_trafo = [coef, 0.0, 0.0, coef, 0.0, 0.0]
p1 = libgeom.apply_trafo_to_point(path[1][-1], self.trafo)
if len(path[1]) == 1:
p0 = libgeom.apply_trafo_to_point(path[0], self.trafo)
else:
if libgeom.is_curve_point(p1):
p0 = p1[1]
p1 = p1[2]
else:
p0 = libgeom.bezier_base_point(path[1][-2])
p0 = libgeom.apply_trafo_to_point(p0, self.trafo)
angle = libgeom.get_point_angle(p1, p0)
start_trafo = tr(start_trafo, libgeom.trafo_rotate(angle))
trafo = [1.0, 0.0, 0.0, 1.0, p1[0], p1[1]]
start_trafo = tr(start_trafo, trafo)
start = arrows.get_arrow_cpath(arrs[1], start_trafo)
self.cache_arrows.append([end, start])
def _circular_arc_centre_close(self, element):
center, chunk = self.read_point(element.params)
p1, chunk = self.read_point(chunk)
p2, chunk = self.read_point(chunk)
flag = self.read_enum(chunk)[0]
center, p1, p2 = libgeom.apply_trafo_to_points(
[center, p1, p2], self.get_trafo())
r = self.read_vdc(chunk)[0] * self.scale
angle1 = libgeom.get_point_angle(p1, center)
angle2 = libgeom.get_point_angle(p2, center)
x, y = center
rect = [x - r, y - r, 2 * r, 2 * r]
flag = {0: sk2const.ARC_PIE_SLICE,
1: sk2const.ARC_CHORD}.get(flag, sk2const.ARC_CHORD)
circle = sk2_model.Circle(self.layer.config, self.layer, rect,
angle1=angle1,
angle2=angle2,
circle_type=flag,
style=self.get_style(fill=True))
self.layer.childs.append(circle)
def _circular_arc_3_point(self, element):
p1, chunk = self.read_point(element.params)
p2, chunk = self.read_point(chunk)
p3, chunk = self.read_point(chunk)
p1, p2, p3 = libgeom.apply_trafo_to_points(
[p1, p2, p3], self.get_trafo())
center = libgeom.circle_center_by_3points(p1, p2, p3)
if not center:
return
r = libgeom.distance(center, p1)
angle1 = libgeom.get_point_angle(p3, center)
angle2 = libgeom.get_point_angle(p1, center)
x, y = center
rect = [x - r, y - r, 2 * r, 2 * r]
circle = sk2_model.Circle(self.layer.config, self.layer, rect,
angle1=angle1,
angle2=angle2,
circle_type=sk2const.ARC_ARC,
style=self.get_style(stroke=True))
self.layer.childs.append(circle)
def _calc_bottom_left_rotate_trafo(self, event):
is_centering = not event.is_shift()
is_constraining = event.is_ctrl()
start_point = self.canvas.win_to_doc(self.start)
end_point = self.canvas.win_to_doc(self.end)
bbox = self.presenter.selection.bbox
if is_centering:
bbox_center = libgeom.bbox_center(bbox)
center_offset = self.selection.center_offset
center = libgeom.add_points(bbox_center, center_offset)
else:
center = libgeom.bbox_points(bbox)[3]
a1 = libgeom.get_point_angle(start_point, center)
a2 = libgeom.get_point_angle(end_point, center)
angle = a2 - a1
if is_constraining:
step = math.radians(config.rotation_step)
angle = (angle + step / 2.0) // step * step
return libgeom.trafo_rotate(angle, center[0], center[1])
def fill_linear_tr_gradient(self, obj, pdfpath, fill_trafo, gradient):
if not fill_trafo:
fill_trafo = [1.0, 0.0, 0.0, 1.0, 0.0, 0.0]
stops = gradient[2]
sp, ep = gradient[1]
dx, dy = sp
l = libgeom.distance(sp, ep)
angle = libgeom.get_point_angle(ep, sp)
m21 = math.sin(angle)
m11 = m22 = math.cos(angle)
m12 = -m21
trafo = [m11, m21, m12, m22, dx, dy]
inv_trafo = libgeom.multiply_trafo(libgeom.invert_trafo(fill_trafo),
libgeom.invert_trafo(trafo))
cv_trafo = libgeom.multiply_trafo(trafo, fill_trafo)
paths = libgeom.apply_trafo_to_paths(obj.paths, obj.trafo)
paths = libgeom.apply_trafo_to_paths(paths, inv_trafo)
bbox = libgeom.sum_bbox(libgeom.get_paths_bbox(paths),
[0.0, 0.0, l, 0.0])
bbox = libgeom.normalize_bbox(bbox)
y = bbox[1]
d = libgeom.distance(*libgeom.apply_trafo_to_points([[0.0, 0.0],
[0.0, 1.0]],
inv_trafo))
height = bbox[3] - bbox[1]
self.canvas.saveState()
self.canvas.clipPath(pdfpath, 0, 0)
self.canvas.transform(*cv_trafo)
self.canvas.setFillColor(self.get_grcolor_at_point(stops, 0.0))
self.canvas.rect(bbox[0], y, 0.0 - bbox[0], height, stroke=0, fill=1)
x = 0.0
while x < l:
point = x / l
self.canvas.setFillColor(self.get_grcolor_at_point(stops, point))
if x + d < l:
width = d
else:
width = l - x
self.canvas.rect(x, y, width, height, stroke=0, fill=1)
x += d
self.canvas.setFillColor(self.get_grcolor_at_point(stops, 1.0))
self.canvas.rect(l, y, bbox[2] - l, height, stroke=0, fill=1)
self.canvas.restoreState()
def fill_linear_tr_gradient(self, obj, pdfpath, fill_trafo, gradient): if not fill_trafo: fill_trafo = [1.0, 0.0, 0.0, 1.0, 0.0, 0.0] stops = gradient[2] sp, ep = gradient[1] dx, dy = sp l = libgeom.distance(sp, ep) angle = libgeom.get_point_angle(ep, sp) m21 = math.sin(angle) m11 = m22 = math.cos(angle) m12 = -m21 trafo = [m11, m21, m12, m22, dx, dy] inv_trafo = libgeom.multiply_trafo(libgeom.invert_trafo(fill_trafo), libgeom.invert_trafo(trafo)) cv_trafo = libgeom.multiply_trafo(trafo, fill_trafo) paths = libgeom.apply_trafo_to_paths(obj.paths, obj.trafo) paths = libgeom.apply_trafo_to_paths(paths, inv_trafo) bbox = libgeom.sum_bbox(libgeom.get_paths_bbox(paths), [0.0, 0.0, l, 0.0]) bbox = libgeom.normalize_bbox(bbox) y = bbox[1] d = libgeom.distance(*libgeom.apply_trafo_to_points([[0.0, 0.0], [0.0, 1.0]], inv_trafo)) height = bbox[3] - bbox[1] self.canvas.saveState() self.canvas.clipPath(pdfpath, 0, 0) self.canvas.transform(*cv_trafo) self.canvas.setFillColor(self.get_grcolor_at_point(stops, 0.0)) self.canvas.rect(bbox[0], y, 0.0 - bbox[0], height, stroke=0, fill=1) x = 0.0 while x < l: point = x / l self.canvas.setFillColor(self.get_grcolor_at_point(stops, point)) if x + d < l: width = d else: width = l - x self.canvas.rect(x, y, width, height, stroke=0, fill=1) x += d self.canvas.setFillColor(self.get_grcolor_at_point(stops, 1.0)) self.canvas.rect(l, y, bbox[2] - l, height, stroke=0, fill=1) self.canvas.restoreState()
def apply_midpoint_change(self, point, index, control=False, final=False): wpoint = self.canvas.point_win_to_doc(point) invtrafo = libgeom.invert_trafo(self.target.trafo) x, y = libgeom.apply_trafo_to_point(wpoint, invtrafo) radius = self.target.get_midpoint_radius() angle = self.target.get_midpoint_angle(index) coef2 = libgeom.get_point_radius([x, y]) / radius if control: props = [self.orig_angle1, self.orig_angle2, self.orig_coef1, coef2] else: angle2 = libgeom.get_point_angle([x, y]) - angle props = [self.orig_angle1, angle2, self.orig_coef1, coef2] if final: props_before = [self.orig_angle1, self.orig_angle2, self.orig_coef1, self.orig_coef2] self.api.set_polygon_properties_final(props, props_before, self.target) else: self.api.set_polygon_properties(props, self.target) self.update_points()
def apply_midpoint_change(self, point, index, control=False, final=False):
wpoint = self.canvas.point_win_to_doc(point)
invtrafo = libgeom.invert_trafo(self.target.trafo)
x, y = libgeom.apply_trafo_to_point(wpoint, invtrafo)
radius = self.target.get_midpoint_radius()
angle = self.target.get_midpoint_angle(index)
coef2 = libgeom.get_point_radius([x, y]) / radius
if control:
props = [self.orig_angle1, self.orig_angle2,
self.orig_coef1, coef2]
else:
angle2 = libgeom.get_point_angle([x, y]) - angle
props = [self.orig_angle1, angle2,
self.orig_coef1, coef2]
if final:
props_before = [self.orig_angle1, self.orig_angle2,
self.orig_coef1, self.orig_coef2]
self.api.set_polygon_properties_final(props, props_before,
self.target)
else:
self.api.set_polygon_properties(props, self.target)
self.update_points()
def set_sk2_style(sk1_style, dest_obj=None):
sk2_style = [[], [], [], []]
line_pattern = sk1_style.line_pattern
fill_pattern = sk1_style.fill_pattern
if not line_pattern.is_Empty:
sk2_line = [
sk2const.STROKE_MIDDLE, sk1_style.line_width,
get_sk2_color(line_pattern.color),
list(sk1_style.line_dashes), SK2_LINE_CAP[sk1_style.line_cap],
SK2_LINE_JOIN[sk1_style.line_join], 10.0, 0, 0, []
]
sk2_style[1] = sk2_line
if fill_pattern.is_Solid:
sk2_fill = []
if fill_pattern.is_Solid:
sk2_fill = [
sk2const.FILL_EVENODD, sk2const.FILL_SOLID,
get_sk2_color(fill_pattern.color)
]
sk2_style[0] = sk2_fill
elif fill_pattern.is_AxialGradient:
stops = get_sk2_stops(fill_pattern.gradient.colors)
point = [fill_pattern.direction.x, fill_pattern.direction.y]
angle = libgeom.get_point_angle(point, [0.0, 0.0])
points = [[0.0, 0.0], [1.0, 0.0], [1.0, 1.0], [0.0, 1.0]]
m21 = math.sin(-angle)
m11 = m22 = math.cos(-angle)
m12 = -m21
dx = 0.5 - m11 * 0.5 + m21 * 0.5
dy = 0.5 - m21 * 0.5 - m11 * 0.5
trafo = [m11, m21, m12, m22, dx, dy]
points = libgeom.apply_trafo_to_points(points, trafo)
bbox = libgeom.bbox_for_points(points)
w, h = libgeom.bbox_size(bbox)
vector = [[bbox[0], 0.5], [bbox[2], 0.5]]
invtrafo = libgeom.invert_trafo(trafo)
vector = libgeom.apply_trafo_to_points(vector, invtrafo)
dest_obj.update()
bbox = dest_obj.cache_bbox
w, h = libgeom.bbox_size(bbox)
trafo = [w, 0.0, 0.0, h, bbox[0], bbox[1]]
vector = libgeom.apply_trafo_to_points(vector, trafo)
sk2_fill = [
sk2const.FILL_EVENODD, sk2const.FILL_GRADIENT,
[sk2const.GRADIENT_LINEAR, vector, stops]
]
sk2_style[0] = sk2_fill
dest_obj.fill_trafo = [] + sk2const.NORMAL_TRAFO
elif fill_pattern.is_RadialGradient or fill_pattern.is_ConicalGradient:
stops = get_sk2_stops(fill_pattern.gradient.colors)
dest_obj.update()
bbox = dest_obj.cache_bbox
cg = [fill_pattern.center.x, fill_pattern.center.y]
w, h = libgeom.bbox_size(bbox)
start_point = [bbox[0] + w * cg[0], bbox[1] + h * cg[1]]
points = libgeom.bbox_points(bbox)
r = 0
for point in points:
dist = libgeom.distance(point, start_point)
r = max(r, dist)
end_point = [start_point[0] + r, start_point[1]]
sk2_fill = [
sk2const.FILL_EVENODD, sk2const.FILL_GRADIENT,
[sk2const.GRADIENT_RADIAL, [start_point, end_point], stops]
]
sk2_style[0] = sk2_fill
dest_obj.fill_trafo = [] + sk2const.NORMAL_TRAFO
dest_obj.style = sk2_style
def parse_svg_path_cmds(pathcmds):
index = 0
last = None
last_index = 0
cmds = []
pathcmds = re.sub(' *', ' ', pathcmds)
for item in pathcmds:
if item in 'MmZzLlHhVvCcSsQqTtAa':
if last:
coords = parse_svg_coords(pathcmds[last_index + 1:index])
cmds.append((last, coords))
last = item
last_index = index
index += 1
coords = parse_svg_coords(pathcmds[last_index + 1:index])
cmds.append([last, coords])
paths = []
path = []
cpoint = []
rel_flag = False
last_cmd = 'M'
last_quad = None
for cmd in cmds:
if cmd[0] in 'Mm':
if path: paths.append(path)
path = deepcopy(PATH_STUB)
rel_flag = cmd[0] == 'm'
points = [cmd[1][i:i + 2] for i in range(0, len(cmd[1]), 2)]
for point in points:
if cpoint and rel_flag:
point = add_points(base_point(cpoint), point)
if not path[0]:
path[0] = point
else:
path[1].append(point)
cpoint = point
elif cmd[0] in 'Zz':
p0 = [] + base_point(cpoint)
p1 = [] + path[0]
if not libgeom.is_equal_points(p0, p1, 8):
path[1].append([] + path[0])
path[2] = sk2const.CURVE_CLOSED
cpoint = [] + path[0]
elif cmd[0] in 'Cc':
rel_flag = cmd[0] == 'c'
points = [cmd[1][i:i + 2] for i in range(0, len(cmd[1]), 2)]
points = [points[i:i + 3] for i in range(0, len(points), 3)]
for point in points:
if rel_flag:
point = [
add_points(base_point(cpoint), point[0]),
add_points(base_point(cpoint), point[1]),
add_points(base_point(cpoint), point[2])
]
qpoint = [] + point
qpoint.append(sk2const.NODE_CUSP)
path[1].append(qpoint)
cpoint = point
elif cmd[0] in 'Ll':
rel_flag = cmd[0] == 'l'
points = [cmd[1][i:i + 2] for i in range(0, len(cmd[1]), 2)]
for point in points:
if rel_flag:
point = add_points(base_point(cpoint), point)
path[1].append(point)
cpoint = point
elif cmd[0] in 'Hh':
rel_flag = cmd[0] == 'h'
for x in cmd[1]:
dx, y = base_point(cpoint)
if rel_flag:
point = [x + dx, y]
else:
point = [x, y]
path[1].append(point)
cpoint = point
elif cmd[0] in 'Vv':
rel_flag = cmd[0] == 'v'
for y in cmd[1]:
x, dy = base_point(cpoint)
if rel_flag:
point = [x, y + dy]
else:
point = [x, y]
path[1].append(point)
cpoint = point
elif cmd[0] in 'Ss':
rel_flag = cmd[0] == 's'
points = [cmd[1][i:i + 2] for i in range(0, len(cmd[1]), 2)]
points = [points[i:i + 2] for i in range(0, len(points), 2)]
for point in points:
q = cpoint
p = cpoint
if len(cpoint) > 2:
q = cpoint[1]
p = cpoint[2]
p1 = sub_points(add_points(p, p), q)
if rel_flag:
p2 = add_points(base_point(cpoint), point[0])
p3 = add_points(base_point(cpoint), point[1])
else:
p2, p3 = point
point = [p1, p2, p3]
qpoint = [] + point
qpoint.append(sk2const.NODE_CUSP)
path[1].append(qpoint)
cpoint = point
elif cmd[0] in 'Qq':
rel_flag = cmd[0] == 'q'
groups = [cmd[1][i:i + 4] for i in range(0, len(cmd[1]), 4)]
for vals in groups:
p = base_point(cpoint)
if rel_flag:
q = add_points(p, [vals[0], vals[1]])
p3 = add_points(p, [vals[2], vals[3]])
else:
q = [vals[0], vals[1]]
p3 = [vals[2], vals[3]]
p1 = add_points(mult_point(p, F13), mult_point(q, F23))
p2 = add_points(mult_point(p3, F13), mult_point(q, F23))
point = [p1, p2, p3]
qpoint = [] + point
qpoint.append(sk2const.NODE_CUSP)
path[1].append(qpoint)
cpoint = point
last_quad = q
elif cmd[0] in 'Tt':
rel_flag = cmd[0] == 't'
groups = [cmd[1][i:i + 2] for i in range(0, len(cmd[1]), 2)]
if last_cmd not in 'QqTt' or last_quad is None:
last_quad = base_point(cpoint)
for vals in groups:
p = base_point(cpoint)
q = sub_points(mult_point(p, 2.0), last_quad)
if rel_flag:
p3 = add_points(p, [vals[0], vals[1]])
else:
p3 = [vals[0], vals[1]]
p1 = add_points(mult_point(p, F13), mult_point(q, F23))
p2 = add_points(mult_point(p3, F13), mult_point(q, F23))
point = [p1, p2, p3]
qpoint = [] + point
qpoint.append(sk2const.NODE_CUSP)
path[1].append(qpoint)
cpoint = point
last_quad = q
elif cmd[0] in 'Aa':
rel_flag = cmd[0] == 'a'
arcs = [cmd[1][i:i + 7] for i in range(0, len(cmd[1]), 7)]
for arc in arcs:
cpoint = base_point(cpoint)
rev_flag = False
rx, ry, xrot, large_arc_flag, sweep_flag, x, y = arc
rx = abs(rx)
ry = abs(ry)
if rel_flag:
x += cpoint[0]
y += cpoint[1]
if cpoint == [x, y]: continue
if not rx or not ry:
path[1].append([x, y])
continue
vector = [[] + cpoint, [x, y]]
if sweep_flag:
vector = [[x, y], [] + cpoint]
rev_flag = True
cpoint = [x, y]
dir_tr = libgeom.trafo_rotate_grad(-xrot)
if rx > ry:
tr = [1.0, 0.0, 0.0, rx / ry, 0.0, 0.0]
r = rx
else:
tr = [ry / rx, 0.0, 0.0, 1.0, 0.0, 0.0]
r = ry
dir_tr = libgeom.multiply_trafo(dir_tr, tr)
vector = libgeom.apply_trafo_to_points(vector, dir_tr)
l = libgeom.distance(*vector)
if l > 2.0 * r: r = l / 2.0
mp = libgeom.midpoint(*vector)
tr0 = libgeom.trafo_rotate(math.pi / 2.0, mp[0], mp[1])
pvector = libgeom.apply_trafo_to_points(vector, tr0)
k = math.sqrt(r * r - l * l / 4.0)
if large_arc_flag:
center = libgeom.midpoint(mp, pvector[1], 2.0 * k / l)
else:
center = libgeom.midpoint(mp, pvector[0], 2.0 * k / l)
angle1 = libgeom.get_point_angle(vector[0], center)
angle2 = libgeom.get_point_angle(vector[1], center)
da = angle2 - angle1
start = angle1
end = angle2
if large_arc_flag:
if -math.pi >= da or da <= math.pi:
start = angle2
end = angle1
rev_flag = not rev_flag
else:
if -math.pi <= da or da >= math.pi:
start = angle2
end = angle1
rev_flag = not rev_flag
pth = libgeom.get_circle_paths(start, end, sk2const.ARC_ARC)[0]
if rev_flag:
pth = libgeom.reverse_path(pth)
points = pth[1]
for point in points:
if len(point) == 3:
point.append(sk2const.NODE_CUSP)
tr0 = [1.0, 0.0, 0.0, 1.0, -0.5, -0.5]
points = libgeom.apply_trafo_to_points(points, tr0)
tr1 = [2.0 * r, 0.0, 0.0, 2.0 * r, 0.0, 0.0]
points = libgeom.apply_trafo_to_points(points, tr1)
tr2 = [1.0, 0.0, 0.0, 1.0, center[0], center[1]]
points = libgeom.apply_trafo_to_points(points, tr2)
tr3 = libgeom.invert_trafo(dir_tr)
points = libgeom.apply_trafo_to_points(points, tr3)
for point in points:
path[1].append(point)
last_cmd = cmd[0]
if path: paths.append(path)
return paths
