def __sub__(self, other):
delta = super().__sub__(other)
if isinstance(other, PointAny):
if other.is_mutable():
return mVec(delta)
else:
return Vec(delta)
return delta
def __sub__(self, other):
delta = super().__sub__(other)
if isinstance(other, PointAny):
if other.is_mutable():
return mVec(delta)
else:
return Vec(delta)
return delta
def rotate(self, theta):
"""
Rotate vector by an angle theta around origin.
"""
if isinstance(theta, self._rotmat):
return theta * self
cls = type(self)
x, y = self
cos_t, sin_t = self._cos(theta), self._sin(theta)
# TODO: decent implementation of this!
try:
return cls(x * cos_t - y * sin_t, x * sin_t + y * cos_t)
except InexactError:
if isinstance(self, Mutable):
return mVec(x * cos_t - y * sin_t, x * sin_t + y * cos_t)
else:
return Vec(x * cos_t - y * sin_t, x * sin_t + y * cos_t)
def rotate(self, theta):
"""
Rotate vector by an angle theta around origin.
"""
if isinstance(theta, self._rotmat):
return theta * self
cls = type(self)
x, y = self
cos_t, sin_t = self._cos(theta), self._sin(theta)
# TODO: decent implementation of this!
try:
return cls(x * cos_t - y * sin_t, x * sin_t + y * cos_t)
except InexactError:
if isinstance(self, Mutable):
return mVec(x * cos_t - y * sin_t, x * sin_t + y * cos_t)
else:
return Vec(x * cos_t - y * sin_t, x * sin_t + y * cos_t)