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| author | Hamilton Kibbe <hamilton.kibbe@gmail.com> | 2014-10-28 22:11:43 -0400 |
|---|---|---|
| committer | Hamilton Kibbe <hamilton.kibbe@gmail.com> | 2014-10-28 22:11:43 -0400 |
| commit | f5abd5b0bdc0b9f524456dc9216bd0f3732e82a0 (patch) | |
| tree | 896c4398f4ee680a63bd8a29b86cee21b95ec836 /gerber/primitives.py | |
| parent | b488ab6af9d7925263b2d0712abfd2ba55dc96d2 (diff) | |
| download | gerbonara-f5abd5b0bdc0b9f524456dc9216bd0f3732e82a0.tar.gz gerbonara-f5abd5b0bdc0b9f524456dc9216bd0f3732e82a0.tar.bz2 gerbonara-f5abd5b0bdc0b9f524456dc9216bd0f3732e82a0.zip | |
Add arc rendering and tests
Diffstat (limited to 'gerber/primitives.py')
| -rw-r--r-- | gerber/primitives.py | 63 |
1 files changed, 58 insertions, 5 deletions
diff --git a/gerber/primitives.py b/gerber/primitives.py index b3869e1..f934f74 100644 --- a/gerber/primitives.py +++ b/gerber/primitives.py @@ -44,8 +44,8 @@ class Line(Primitive): @property
def angle(self):
- delta_x, delta_y = tuple(map(sub, end, start))
- angle = degrees(math.tan(delta_y/delta_x))
+ delta_x, delta_y = tuple(map(sub, self.end, self.start))
+ angle = math.atan2(delta_y, delta_x)
return angle
@property
@@ -70,18 +70,71 @@ class Arc(Primitive): self.width = width
@property
+ def radius(self):
+ dy, dx = map(sub, self.start, self.center)
+ return math.sqrt(dy**2 + dx**2)
+
+ @property
def start_angle(self):
dy, dx = map(sub, self.start, self.center)
- return math.atan2(dy, dx)
+ return math.atan2(dx, dy)
@property
def end_angle(self):
dy, dx = map(sub, self.end, self.center)
- return math.atan2(dy, dx)
+ return math.atan2(dx, dy)
+
+ @property
+ def sweep_angle(self):
+ two_pi = 2 * math.pi
+ theta0 = (self.start_angle + two_pi) % two_pi
+ theta1 = (self.end_angle + two_pi) % two_pi
+ if self.direction == 'counterclockwise':
+ return abs(theta1 - theta0)
+ else:
+ theta0 += two_pi
+ return abs(theta0 - theta1) % two_pi
@property
def bounding_box(self):
- pass
+ two_pi = 2 * math.pi
+ theta0 = (self.start_angle + two_pi) % two_pi
+ theta1 = (self.end_angle + two_pi) % two_pi
+ points = [self.start, self.end]
+ #Shit's about to get ugly...
+ if self.direction == 'counterclockwise':
+ # Passes through 0 degrees
+ if theta0 > theta1:
+ points.append((self.center[0] + self.radius, self.center[1]))
+ # Passes through 90 degrees
+ if theta0 <= math.pi / 2. and (theta1 >= math.pi / 2. or theta1 < theta0):
+ points.append((self.center[0], self.center[1] + self.radius))
+ # Passes through 180 degrees
+ if theta0 <= math.pi and (theta1 >= math.pi or theta1 < theta0):
+ points.append((self.center[0] - self.radius, self.center[1]))
+ # Passes through 270 degrees
+ if theta0 <= math.pi * 1.5 and (theta1 >= math.pi * 1.5 or theta1 < theta0):
+ points.append((self.center[0], self.center[1] - self.radius ))
+ else:
+ # Passes through 0 degrees
+ if theta1 > theta0:
+ points.append((self.center[0] + self.radius, self.center[1]))
+ # Passes through 90 degrees
+ if theta1 <= math.pi / 2. and (theta0 >= math.pi / 2. or theta0 < theta1):
+ points.append((self.center[0], self.center[1] + self.radius))
+ # Passes through 180 degrees
+ if theta1 <= math.pi and (theta0 >= math.pi or theta0 < theta1):
+ points.append((self.center[0] - self.radius, self.center[1]))
+ # Passes through 270 degrees
+ if theta1 <= math.pi * 1.5 and (theta0 >= math.pi * 1.5 or theta0 < theta1):
+ points.append((self.center[0], self.center[1] - self.radius ))
+ x, y = zip(*points)
+ min_x = min(x)
+ max_x = max(x)
+ min_y = min(y)
+ max_y = max(y)
+ return ((min_x, max_x), (min_y, max_y))
+
class Circle(Primitive):
"""
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