Example #1
0
    def interpret(self, interpreter, variables):
        interpreter.assert_not_closed()
        interpreter.start_new_segment()

        v0 = interpreter.position
        if interpreter.has_last_vertex:
            v0_index = interpreter.get_last_vertex()
        else:
            v0_index = interpreter.new_vertex(*v0)

        start = complex(*v0)
        rad_x_expr, rad_y_expr = self.radii
        rad_x = interpreter.eval_(rad_x_expr, variables)
        rad_y = interpreter.eval_(rad_y_expr, variables)
        radius = complex(rad_x, rad_y)
        xaxis_rot = interpreter.eval_(self.rot, variables)
        flag1 = interpreter.eval_(self.flag1, variables)
        flag2 = interpreter.eval_(self.flag2, variables)

        # numverts, requires -1 else it means segments (21 verts is 20 segments).
        if self.num_verts is not None:
            num_verts = interpreter.eval_(self.num_verts, variables)
        else:
            num_verts = interpreter.dflt_num_verts
        num_verts -= 1

        end = interpreter.calc_vertex(self.is_abs, self.end[0], self.end[1],
                                      variables)
        end = complex(*end)

        arc = Arc(start, radius, xaxis_rot, flag1, flag2, end)

        theta = 1 / num_verts
        for i in range(1, num_verts + 1):
            v1 = x, y = arc.point(theta * i)
            v1_index = interpreter.new_vertex(x, y)
            interpreter.new_edge(v0_index, v1_index)
            v0_index = v1_index

        curve = SvCircle.from_arc(arc)
        interpreter.curves.append(curve)

        interpreter.position = v1
        interpreter.new_knot("A.#", *v1)
        if self.close:
            interpreter.close_segment(v1_index)

        interpreter.has_last_vertex = True
Example #2
0
    def perform_ArcTo(self):
        '''
        expects 6 parameters:
            A rx,ry rot flag1 flag2 x,y num_verts [z]
        example:
            A <2v xr,yr> <rot> <int-bool> <int-bool> <2v xend,yend> <int num_verts> [z]
        '''
        tempstr = self.stripped_line.split(' ')
        if not len(tempstr) == 6:
            print(tempstr)
            print('error on ArcTo line: ', self.stripped_line)
            return

        points = []
        start = complex(*self.posxy)
        radius = complex(*self.get_2vec(tempstr[0]))
        xaxis_rot = self.get_typed(tempstr[1], float)
        flag1 = self.get_typed(tempstr[2], int)
        flag2 = self.get_typed(tempstr[3], int)

        # numverts, requires -1 else it means segments (21 verts is 20 segments).
        num_verts = self.get_typed(tempstr[5], int) - 1

        if self.section_type == 'arc_to_absolute':
            end = complex(*self.get_2vec(tempstr[4]))
        else:
            xy_end_pre = self.get_2vec(tempstr[4])
            xy_end_final = self.relative(self.posxy, xy_end_pre)
            end = complex(*xy_end_final)

        arc = Arc(start, radius, xaxis_rot, flag1, flag2, end)

        theta = 1/num_verts
        for i in range(num_verts+1):
            point = arc.point(theta * i)
            points.append(point)

        return self.find_right_index_and_make_edges(points)
Example #3
0
    def perform_ArcTo(self):
        '''
        expects 6 parameters:
            A rx,ry rot flag1 flag2 x,y num_verts [z]
        example:
            A <2v xr,yr> <rot> <int-bool> <int-bool> <2v xend,yend> <int num_verts> [z]
        '''
        tempstr = self.stripped_line.split(' ')
        if not len(tempstr) == 6:
            print(tempstr)
            print('error on ArcTo line: ', self.stripped_line)
            return

        points = []
        start = complex(*self.posxy)
        radius = complex(*self.get_2vec(tempstr[0]))
        xaxis_rot = self.get_typed(tempstr[1], float)
        flag1 = self.get_typed(tempstr[2], int)
        flag2 = self.get_typed(tempstr[3], int)

        # numverts, requires -1 else it means segments (21 verts is 20 segments).
        num_verts = self.get_typed(tempstr[5], int) - 1

        if self.section_type == 'arc_to_absolute':
            end = complex(*self.get_2vec(tempstr[4]))
        else:
            xy_end_pre = self.get_2vec(tempstr[4])
            xy_end_final = self.relative(self.posxy, xy_end_pre)
            end = complex(*xy_end_final)

        arc = Arc(start, radius, xaxis_rot, flag1, flag2, end)

        theta = 1/num_verts
        for i in range(num_verts+1):
            point = arc.point(theta * i)
            points.append(point)

        return self.find_right_index_and_make_edges(points)