使用海龟绘制填充多边形的填充线

Question

我能够想出一个多边形，但我需要用像下图这样的影线填充它，只使用海龟和函数。下面是创建多边形的代码。我不确定如何创建一个函数来用平行影线填充我的多边形。

import turtle

def get_polygon_vertices(num_vertices):
    
    vertices = []
    for i in range(num_vertices):
        x = int(input(f"Enter x coordinate of vertex {i+1}: "))
        y = int(input(f"Enter y coordinate of vertex {i+1}: "))
        vertices.append((x, y))
    return vertices

def draw_polygon(vertices):
  
    turtle.up()
    turtle.goto(vertices[0])
    turtle.down()
    for vertex in vertices:
        turtle.goto(vertex)
    turtle.goto(vertices[0])

def hatch(spacing, angle=45, color='black', linewidth=10):
    t = turtle.Turtle()
    t.speed(0)
    t.color(color)
    t.pensize(linewidth)
    for x in range(-400, 400, int(spacing)):
        t.penup()
        t.goto(x, 400)
        t.pendown()
        t.setheading(angle)
        t.forward(800)
  


Get number of vertices from user input
n = int(input("Enter number of polygon vertices: "))

# Get polygon vertices from user input
polygon_vertices = get_polygon_vertices(n)

# Main
draw_polygon(polygon_vertices)
hatch(25,)
turtle.done()