def round_corners(self, radius=0.5): vertices = self.get_vertices() arcs = [] for v1, v2, v3 in adjacent_n_tuples(vertices, 3): vect1 = v2 - v1 vect2 = v3 - v2 unit_vect1 = normalize(vect1) unit_vect2 = normalize(vect2) angle = angle_between_vectors(vect1, vect2) # Negative radius gives concave curves angle *= np.sign(radius) # Distance between vertex and start of the arc cut_off_length = radius * np.tan(angle / 2) # Determines counterclockwise vs. clockwise sign = np.sign(np.cross(vect1, vect2)[2]) arc = ArcBetweenPoints( v2 - unit_vect1 * cut_off_length, v2 + unit_vect2 * cut_off_length, angle=sign * angle ) arcs.append(arc) self.clear_points() # To ensure that we loop through starting with last arcs = [arcs[-1], *arcs[:-1]] for arc1, arc2 in adjacent_pairs(arcs): self.append_points(arc1.points) line = Line(arc1.get_end(), arc2.get_start()) # Make sure anchors are evenly distributed len_ratio = line.get_length() / arc1.get_arc_length() line.insert_n_curves( int(arc1.get_num_curves() * len_ratio) ) self.append_points(line.get_points()) return self
def round_corners(self, radius=0.5): vertices = self.get_vertices() arcs = [] for v1, v2, v3 in adjacent_n_tuples(vertices, 3): vect1 = v2 - v1 vect2 = v3 - v2 unit_vect1 = normalize(vect1) unit_vect2 = normalize(vect2) angle = angle_between_vectors(vect1, vect2) # Negative radius gives concave curves angle *= np.sign(radius) # Distance between vertex and start of the arc cut_off_length = radius * np.tan(angle / 2) # Determines counterclockwise vs. clockwise sign = np.sign(np.cross(vect1, vect2)[2]) arc = ArcBetweenPoints(v2 - unit_vect1 * cut_off_length, v2 + unit_vect2 * cut_off_length, angle=sign * angle) arcs.append(arc) self.clear_points() # To ensure that we loop through starting with last arcs = [arcs[-1], *arcs[:-1]] for arc1, arc2 in adjacent_pairs(arcs): self.append_points(arc1.points) line = Line(arc1.get_end(), arc2.get_start()) # Make sure anchors are evenly distributed len_ratio = line.get_length() / arc1.get_arc_length() line.insert_n_curves(int(arc1.get_num_curves() * len_ratio)) self.append_points(line.get_points()) return self
def round_corners(self, radius=0.5): vertices = self.get_vertices() arcs = [] for v1, v2, v3 in adjacent_n_tuples(vertices, 3): vect1 = v2 - v1 vect2 = v3 - v2 unit_vect1 = normalize(vect1) unit_vect2 = normalize(vect2) angle = angle_between_vectors(vect1, vect2) # Negative radius gives concave curves angle *= np.sign(radius) # Distance between vertex and start of the arc cut_off_length = radius * np.tan(angle / 2) # Determines counterclockwise vs. clockwise sign = np.sign(np.cross(vect1, vect2)[2]) arcs.append( ArcBetweenPoints(v2 - unit_vect1 * cut_off_length, v2 + unit_vect2 * cut_off_length, angle=sign * angle)) self.clear_points() # To ensure that we loop through starting with last arcs = [arcs[-1], *arcs[:-1]] for arc1, arc2 in adjacent_pairs(arcs): self.append_points(arc1.points) self.add_line_to(arc2.get_start()) return self