Changes the KDTree in MeasuredDirectivity from operating on spherical…

… to cartesian coordinates. Re-generates the test file after visual inspection.

pyroomacoustics/directivities/measured.py

@@ -36,13 +36,12 @@ def __init__(self, orientation, grid, impulse_responses, fs):
  if not isinstance(grid, Grid):
  raise ValueError("Grid must be a Grid object")
 
- self._orientation = orientation
  self._original_grid = grid
  self._irs = impulse_responses
  self.fs = fs
 
  # set the initial orientation
- self.set_orientation(self._orientation)
+ self.set_orientation(orientation)
 
  @property
  def is_impulse_response(self):
@@ -72,7 +71,7 @@ def set_orientation(self, orientation):
  cartesian_points=self._orientation.rotate(self._original_grid.cartesian)
  )
  # create the kd-tree
- self._kdtree = cKDTree(self._grid.spherical.T)
+ self._kdtree = cKDTree(self._grid.cartesian.T)
 
  def get_response(
  self, azimuth, colatitude=None, magnitude=False, frequency=None, degrees=True
@@ -97,7 +96,9 @@ def get_response(
  azimuth = np.radians(azimuth)
  colatitude = np.radians(colatitude)
 
- _, index = self._kdtree.query(np.column_stack((azimuth, colatitude)))
+ cart = spher2cart(azimuth, colatitude)
+
+ _, index = self._kdtree.query(cart.T)
  return self._irs[index, :]
 
  @requires_matplotlib