vent_DXF/drawer/FanSystemDrawer.py

import math

import ezdxf
from ezdxf import math as mt

from core import rotate_point_around_another


class FanSystemDrawer:
    def __init__(self, msp, layer, gap, center, route):
        self.msp = msp
        self.gap = gap
        self.center = center
        self.route = route
        self.layer = layer

    def draw_fan_system(self):
        rad = self.gap / 2
        carc = mt.arc.ConstructionArc()

        # 初始化扇形起始和结束点
        fan_a_start = (self.center[0], self.center[1] + rad)
        fan_b_start = (self.center[0] - rad / 2, self.center[1] + rad / 2)

        # 绘制中心圆
        self.msp.add_circle(self.center, rad,dxfattribs={"layer": f"图层{self.layer}"})

        # 绘制每个扇形
        for i in range(3):
            fan_a = rotate_point_around_another(fan_a_start, self.center, self.route + i * (2 / 3) * math.pi)
            fan_b = rotate_point_around_another(fan_b_start, self.center, self.route + i * (2 / 3) * math.pi)

            fan_carc_3p = carc.from_3p(start_point=fan_a, def_point=fan_b, end_point=self.center)
            self.msp.add_arc(center=fan_carc_3p.center, radius=fan_carc_3p.radius,
                             start_angle=fan_carc_3p.start_angle, end_angle=fan_carc_3p.end_angle,dxfattribs={"layer": f"图层{self.layer}"})

            # 绘制中心到扇形起点的线段
            self.msp.add_line(fan_a, self.center,dxfattribs={"layer": f"图层{self.layer}"})