vent_DXF_2/drawer/fan_main_drawer.py

import math

import core
from drawer.BaseDrawer import VentGraphDrawer


class FanMainDrawer(VentGraphDrawer):

    def initialize_data(self):
        pass

    def draw_obj(self, center, route):
        rad = 0.5 * self.obj.width
        a = math.pi / 8
        b = 10 / 3 * rad

        self.msp.add_circle(center=center, radius=rad, dxfattribs={"layer": f"图层{self.obj.layer_id}"})

        A = (rad * math.cos(a) + center[0], rad * math.sin(a) + center[1])

        C = (rad * math.cos(a) + center[0], -rad * math.sin(a) + center[1])

        B = ((b / 2) / math.tan(a) + center[0], (b / 2) + center[1])

        D = ((b / 2) / math.tan(a) + center[0], -(b / 2) + center[1])

        A = core.rotate_point_around_another(A, center, route)
        B = core.rotate_point_around_another(B, center, route)
        C = core.rotate_point_around_another(C, center, route)
        D = core.rotate_point_around_another(D, center, route)

        self.msp.add_line(A, B, dxfattribs={"layer": f"图层{self.obj.layer_id}"})

        self.msp.add_line(B, D, dxfattribs={"layer": f"图层{self.obj.layer_id}"})

        self.msp.add_line(C, D, dxfattribs={"layer": f"图层{self.obj.layer_id}"})