Merge pull request #77 from ColdingPlasma883/master

Visualization.py contains Y-Axis bug and Source.py frequency is not updated when _resister_grid() is called.

fdtd/sources.py

@@ -88,6 +88,7 @@ def _register_grid(self, grid: Grid, x: Number, y: Number, z: Number):
             raise ValueError("a point source should be placed on a single grid cell.")
         self.x, self.y, self.z = grid._handle_tuple((x, y, z))
         self.period = grid._handle_time(self.period)
+        self.frequency = 1.0 / self.period
 
     def update_E(self):
         """Add the source to the electric field"""
@@ -191,6 +192,7 @@ def _register_grid(
         self.x, self.y, self.z = self._handle_slices(x, y, z)
 
         self.period = grid._handle_time(self.period)
+        self.frequency = 1.0 / self.period
 
         L = len(self.x)
         vect = bd.array(
@@ -370,6 +372,7 @@ def _register_grid(
         self.x, self.y, self.z = self._handle_slices(x, y, z)
 
         self.period = grid._handle_time(self.period)
+        self.frequency = 1.0 / self.period
 
         x = bd.arange(self.x.start, self.x.stop, 1) - (self.x.start + self.x.stop) // 2
         y = bd.arange(self.y.start, self.y.stop, 1) - (self.y.start + self.y.stop) // 2

fdtd/visualization.py

@@ -163,7 +163,7 @@ def visualize(
                 _y = source.z
             elif y is not None:
                 _x = source.z
-                _y = source.y
+                _y = source.x
             elif z is not None:
                 _x = source.x
                 _y = source.y