1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
#!/usr/bin/env python3
import math
from gerbonara.graphic_objects import Arc
from gerbonara.graphic_objects import rotate_point
def approx_test():
print('<?xml version="1.0" encoding="utf-8"?>')
print('<svg width="300mm" height="300mm" viewBox="0 0 300 300" xmlns="http://www.w3.org/2000/svg">')
n = 16
eps = 1/n*2*math.pi
cx, cy = 0, 0
for clockwise in False, True:
for start_angle in range(n):
cx, cy = 0, cy+2.5
for sweep_angle in range(n):
for color, max_error in zip(['black', 'red', 'blue', 'magenta'], [0.1, 0.3, 1, 3]):
cx = cx+2.5
x1, y1 = rotate_point(0, -1, start_angle*eps)
x2, y2 = rotate_point(x1, y1, sweep_angle*eps*(-1 if clockwise else 1))
arc = Arc(x1+cx, y1+cy, x2+cx, y2+cy, -x1, -y1, clockwise=clockwise, aperture=None, polarity_dark=True)
lines = arc.approximate(max_error=max_error)
print(f'<path style="fill: {color}; stroke: none;" d="M {cx} {cy} L {lines[0].x1} {lines[0].y1}', end=' ')
for line in lines:
print(f'L {line.x2} {line.y2}', end=' ')
print('"/>')
print('</svg>')
if __name__ == '__main__':
approx_test()
|
