#!/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()