draw_filled_semicircle.py

draw_filled_semicircle.py

import canvas

# This functions draws a filled semicircle with center at (center_x, center_y)
# and radius = radius
# Note that it actually draws 64 curve segments to approximate the semicircle
# You can use this function to draw the top part of a mushroom
def draw_filled_semicircle(center_x, center_y, radius):
  import math
  canvas.move_to(center_x-radius, center_y)
  n = 64
  for i in range(n):
    canvas.add_quad_curve(center_x - math.cos(math.pi*i/n)*radius, 
                          math.sin(math.pi*i/n)*radius + center_y,
                          center_x - math.cos(math.pi*(i+1)/n)*radius, 
                          math.sin(math.pi*(i+1)/n)*radius + center_y)
  canvas.close_path()
  canvas.fill_path()


canvas.set_size(1000, 600)
canvas.set_fill_color(1.00, 0.40, 0.40)
# draw a semicircle with center at (500, 200) and radius of 300
draw_filled_semicircle(500, 200, 200)