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-rw-r--r--gerberex/dxf.py20
1 files changed, 15 insertions, 5 deletions
diff --git a/gerberex/dxf.py b/gerberex/dxf.py
index 95a3114..2341092 100644
--- a/gerberex/dxf.py
+++ b/gerberex/dxf.py
@@ -51,12 +51,13 @@ def _intersections_of_line_and_circle(start, end, center, radius, error_range):
dr = sqrt(dx * dx + dy * dy)
D = x1 * y2 - x2 * y1
+ distance = abs(dy * x1 - dx * y1) / dr
+
D2 = D * D
dr2 = dr * dr
r2 = radius * radius
delta = r2 * dr2 - D2
- e4 = error_range * error_range * error_range * error_range * 10
- if delta > - e4 and delta < e4:
+ if distance > radius - error_range and distance < radius + error_range:
delta = 0
if delta < 0:
return None
@@ -198,7 +199,7 @@ class DxfLineStatement(DxfStatement):
denominator = (self.end[0] - self.start[0]) * (point_to[1] - point_from[1]) - \
(self.end[1] - self.start[1]) * (point_to[0] - point_from[0])
de = error_range * error_range
- if denominator > -de and denominator < de:
+ if denominator >= -de and denominator <= de:
return []
from_dx = point_from[0] - self.start[0]
from_dy = point_from[1] - self.start[1]
@@ -356,16 +357,25 @@ class DxfArcStatement(DxfStatement):
elif p2 is not None and is_equal_point(p2, self.start, error_range):
p2 = None
+ def is_contained(angle, region, error):
+ if angle >= region[0] - error and angle <= region[1] + error:
+ return True
+ if angle < 0 and region[1] > 0:
+ angle = angle + 2 * pi
+ elif angle > 0 and region[0] < 0:
+ angle = angle - 2 * pi
+ return angle >= region[0] - error and angle <= region[1] + error
+
aerror = error_range * self.radius
pts = []
if p1 is not None and p1_t >= 0 and not is_equal_point(p1, self.start, error_range):
for region in self.angle_regions:
- if p1_angle >= region[0] - aerror and p1_angle <= region[1] + aerror:
+ if is_contained(p1_angle, region, aerror):
pts.append(p1)
break
if p2 is not None and p2_t >= 0 and not is_equal_point(p2, self.start, error_range):
for region in self.angle_regions:
- if p2_angle >= region[0] - aerror and p2_angle <= region[1] + aerror:
+ if is_contained(p2_angle, region, aerror):
pts.append(p2)
break