def _rotation_matrix(self) -> QMatrix4x4:
"""
:return: A QMatrix4x4 describing the rotation from the Z axis to the cylinder's axis
"""
default_axis = QVector3D(0, 0, 1)
desired_axis = self.axis_direction.normalized()
rotate_axis = QVector3D.crossProduct(desired_axis, default_axis)
rotate_radians = acos(QVector3D.dotProduct(desired_axis, default_axis))
rotate_matrix = QMatrix4x4()
rotate_matrix.rotate(degrees(rotate_radians), rotate_axis)
return rotate_matrix
def createRotation(self, firstPoint, nextPoint):
lastPos3D = self.projectToTrackball(firstPoint).normalized()
currentPos3D = self.projectToTrackball(nextPoint).normalized()
angle = acos(self.clamp(QVector3D.dotProduct(currentPos3D, lastPos3D)))
direction = QVector3D.crossProduct(currentPos3D, lastPos3D)
return angle, direction
def test_get_an_orthogonal_unit_vector_gives_an_orthogonal_vector(test_vector):
result_vector = get_an_orthogonal_unit_vector(test_vector[0])
# Test orthogonal (dot product is zero)
assert QVector3D.dotProduct(test_vector[0], result_vector) == approx(0)
