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Issue #45: fix line intersection.

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Use infinite lines to find intersection point.
This commit is contained in:
Sergey Vartanov 2021-06-01 04:15:29 +03:00
parent edf75ff53c
commit b15029a07e
2 changed files with 21 additions and 25 deletions
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12
roentgen/vector.py
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@ -21,10 +21,12 @@ def turn_by_angle(vector: np.array, angle: float):
"""
Turn vector by an angle.
"""
return np.array((
vector[0] * np.cos(angle) - vector[1] * np.sin(angle),
vector[0] * np.sin(angle) + vector[1] * np.cos(angle),
))
return np.array(
(
vector[0] * np.cos(angle) - vector[1] * np.sin(angle),
vector[0] * np.sin(angle) + vector[1] * np.cos(angle),
)
)
def norm(vector: np.array) -> np.array:
@ -44,7 +46,7 @@ class Line:
# util.error("cannot create line by one point")
self.a: float = start[1] - end[1]
self.b: float = end[0] - start[0]
self.c: float = start.x * end.y - end.x * start.y
self.c: float = start[0] * end[1] - end[0] * start[1]
def parallel_shift(self, shift: np.array):
"""