Fix propagating seed value for adding grass

gprMax/cmds_geometry/add_grass.py

@@ -78,8 +78,13 @@ class AddGrass(UserObjectGeometry):
             raise
 
         try:
-            seed = self.kwargs["seed"]
+            seed = int(self.kwargs["seed"])
         except KeyError:
+            logger.warning(
+                f"{self.__str__()} no value for seed detected. This "
+                "means you will get a different fractal distribution "
+                "every time the model runs."
+            )
             seed = None
 
         if self.do_rotate:
@@ -183,10 +188,9 @@ class AddGrass(UserObjectGeometry):
             logger.exception(f"{self.__str__()} dimensions are not specified correctly")
             raise ValueError
 
-        surface = FractalSurface(xs, xf, ys, yf, zs, zf, frac_dim)
+        surface = FractalSurface(xs, xf, ys, yf, zs, zf, frac_dim, seed)
         surface.ID = "grass"
         surface.surfaceID = requestedsurface
-        surface.seed = seed
 
         # Set the fractal range to scale the fractal distribution between zero and one
         surface.fractalrange = (0, 1)
@@ -230,8 +234,7 @@ class AddGrass(UserObjectGeometry):
             )
 
         # Create grass geometry parameters
-        g = Grass(n_blades)
+        g = Grass(n_blades, surface.seed)
-        g.seed = surface.seed
         surface.grass.append(g)
 
         # Check to see if grass has been already defined as a material

gprMax/cmds_geometry/add_surface_roughness.py

@@ -78,7 +78,7 @@ class AddSurfaceRoughness(UserObjectGeometry):
             raise
 
         try:
-            seed = self.kwargs["seed"]
+            seed = int(self.kwargs["seed"])
         except KeyError:
             logger.warning(
                 f"{self.__str__()} no value for seed detected. This "
@@ -213,14 +213,10 @@ class AddSurfaceRoughness(UserObjectGeometry):
             logger.exception(f"{self.__str__()} dimensions are not specified correctly")
             raise ValueError
 
-        surface = FractalSurface(xs, xf, ys, yf, zs, zf, frac_dim)
+        surface = FractalSurface(xs, xf, ys, yf, zs, zf, frac_dim, seed)
         surface.surfaceID = requestedsurface
         surface.fractalrange = fractalrange
         surface.operatingonID = volume.ID
-        if seed is not None:
-            surface.seed = int(seed)
-        else:
-            surface.seed = seed
         surface.weighting = weighting
 
         # List of existing surfaces IDs

gprMax/cmds_geometry/fractal_box.py

@@ -83,7 +83,7 @@ class FractalBox(UserObjectGeometry):
             raise
 
         try:
-            seed = self.kwargs["seed"]
+            seed = int(self.kwargs["seed"])
         except KeyError:
             logger.warning(
                 f"{self.__str__()} no value for seed detected. This "
@@ -148,14 +148,10 @@ class FractalBox(UserObjectGeometry):
             logger.exception(f"{self.__str__()} mixing model or material with " + "ID {mixing_model_id} does not exist")
             raise ValueError
 
-        volume = FractalVolume(xs, xf, ys, yf, zs, zf, frac_dim)
+        volume = FractalVolume(xs, xf, ys, yf, zs, zf, frac_dim, seed)
         volume.ID = ID
         volume.operatingonID = mixing_model_id
         volume.nbins = nbins
-        if seed is not None:
-            volume.seed = int(seed)
-        else:
-            volume.seed = seed
         volume.weighting = weighting
         volume.averaging = averagefractalbox
         volume.mixingmodel = mixingmodel

gprMax/fractals.py

@@ -32,7 +32,7 @@ class FractalSurface:
 
     surfaceIDs = ["xminus", "xplus", "yminus", "yplus", "zminus", "zplus"]
 
-    def __init__(self, xs, xf, ys, yf, zs, zf, dimension):
+    def __init__(self, xs, xf, ys, yf, zs, zf, dimension, seed):
         """
         Args:
             xs, xf, ys, yf, zs, zf: floats for the extent of the fractal surface
@@ -40,6 +40,7 @@ class FractalSurface:
                                         to correctly define a surface).
             dimension: float for the fractal dimension that controls the fractal
                         distribution.
+            seed: int for seed value for random number generator.
         """
 
         self.ID = None
@@ -54,7 +55,7 @@ class FractalSurface:
         self.ny = yf - ys
         self.nz = zf - zs
         self.dtype = np.dtype(np.complex128)
-        self.seed = None
+        self.seed = seed
         self.dimension = dimension
         # Constant related to fractal dimension from: http://dx.doi.org/10.1017/CBO9781139174695
         self.b = -(2 * self.dimension - 7) / 2
@@ -129,12 +130,13 @@ class FractalSurface:
 class FractalVolume:
     """Fractal volumes."""
 
-    def __init__(self, xs, xf, ys, yf, zs, zf, dimension):
+    def __init__(self, xs, xf, ys, yf, zs, zf, dimension, seed):
         """
         Args:
             xs, xf, ys, yf, zs, zf: floats for the extent of the fractal volume.
             dimension: float for the fractal dimension that controls the fractal
                         distribution.
+            seed: int for seed value for random number generator.
         """
 
         self.ID = None
@@ -156,7 +158,7 @@ class FractalVolume:
         self.originalzf = zf
         self.averaging = False
         self.dtype = np.dtype(np.complex128)
-        self.seed = None
+        self.seed = seed
         self.dimension = dimension
         # Constant related to fractal dimension from: http://dx.doi.org/10.1017/CBO9781139174695
         self.b = -(2 * self.dimension - 7) / 2
@@ -248,17 +250,22 @@ class FractalVolume:
 class Grass:
     """Geometry information for blades of grass."""
 
-    def __init__(self, numblades):
+    def __init__(self, numblades, seed):
         """
         Args:
             numblades: int for the number of blades of grass.
+            seed: int for seed value for random number generator.
         """
 
         self.numblades = numblades
         self.geometryparams = np.zeros((self.numblades, 6), dtype=config.sim_config.dtypes["float_or_double"])
-        self.seed = None
+        self.seed = seed
+
+    def set_geometry_parameters(self):
+        """Sets randomly defined parameters that will be used to calculate 
+            blade and root geometries.
+        """
 
-        # Randomly defined parameters that will be used to calculate geometry
         self.R1 = np.random.default_rng(seed=self.seed)
         self.R2 = np.random.default_rng(seed=self.seed)
         self.R3 = np.random.default_rng(seed=self.seed)