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authorHamilton Kibbe <hamilton.kibbe@gmail.com>2014-10-08 22:49:49 -0400
committerHamilton Kibbe <hamilton.kibbe@gmail.com>2014-10-08 22:49:49 -0400
commitbcb6cbc50dea975954b8a3864690f68ab5e984b7 (patch)
tree761ded543fd1209183a4d5bdc9aa1b38d33bbe79 /gerber/render/apertures.py
parent1653ae5cbe88757e453bccf499dc1b8ccb278e58 (diff)
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Diffstat (limited to 'gerber/render/apertures.py')
-rw-r--r--gerber/render/apertures.py21
1 files changed, 18 insertions, 3 deletions
diff --git a/gerber/render/apertures.py b/gerber/render/apertures.py
index f163b1f..52ae50c 100644
--- a/gerber/render/apertures.py
+++ b/gerber/render/apertures.py
@@ -22,16 +22,31 @@ gerber.render.apertures
This module provides base classes for gerber apertures. These are used by
the rendering engine to draw the gerber file.
"""
-
+import math
class Aperture(object):
""" Gerber Aperture base class
"""
def draw(self, ctx, x, y):
- raise NotImplementedError('The draw method must be implemented in an Aperture subclass.')
+ raise NotImplementedError('The draw method must be implemented \
+ in an Aperture subclass.')
def flash(self, ctx, x, y):
- raise NotImplementedError('The flash method must be implemented in an Aperture subclass.')
+ raise NotImplementedError('The flash method must be implemented \
+ in an Aperture subclass.')
+
+ def _arc_params(self, startx, starty, x, y, i, j):
+ center = (startx + i, starty + j)
+ radius = math.sqrt(math.pow(center[0] - x, 2) +
+ math.pow(center[1] - y, 2))
+ delta_x0 = startx - center[0]
+ delta_y0 = center[1] - starty
+ delta_x1 = x - center[0]
+ delta_y1 = center[1] - y
+ start_angle = math.atan2(delta_y0, delta_x0)
+ end_angle = math.atan2(delta_y1, delta_x1)
+ return {'center': center, 'radius': radius,
+ 'start_angle': start_angle, 'end_angle': end_angle}
class Circle(Aperture):