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boxespy
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Parts.ringSegment()

This commit is contained in:
Florian Festi 2017-03-05 12:52:12 +01:00
parent 5e33d057fc
commit 5956182328
1 changed files with 19 additions and 1 deletions
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20
boxes/parts.py
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@ -1,5 +1,5 @@
from math import *
from boxes import vectors
def arcOnCircle(spanning_angle, outgoing_angle, r=1.0):
angle = spanning_angle + 2 * outgoing_angle
@ -90,3 +90,21 @@ class Parts:
self.corner(angle)
self.move(size, size, move)
def ringSegment(self, r_outside, r_inside, angle, n=1, move=None):
space = 360 * r_inside / self.spacing
n = min(n, 360 / (angle+space))
# XXX be smarter about space
if self.move(r_outside, r_outside, move, True):
return
self.moveTo(r_outside)
for i in range(n):
self.polyline(0, (angle, r_outside), 0, 90, (r_outside-r_inside),
90, (angle, r_inside), 0, 90, (r_outside-r_inside),
90)
x, y = vectors.circlepoint(r_outside, math.radians(angle+space))
self.moveTo(y, r_outside-x, angle+space)
self.move(r_outside, r_outside)
return n