Arc approx WIP

examples/test_arc_approx.py

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+#!/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()