changes

gprMax/solvers.py

@@ -17,12 +17,11 @@
 # along with gprMax.  If not, see <http://www.gnu.org/licenses/>.
 from gprMax.updates import CPUUpdates
 from gprMax.updates import GPUUpdates
+from .subgrids.updates import create_updates as create_subgrid_updates
 from gprMax.utilities import timer
 from .grid import FDTDGrid
 from .grid import GPUGrid
 import gprMax.config as config
-from .subgrids.solver import create_updates as create_subgrid_updates
-from .subgrids.solver import SubGridSolver
 
 
 def create_G(sim_config):
@@ -44,7 +43,7 @@ def create_solver(G, sim_config):
         solver = Solver(updates)
     elif sim_config.subgrid:
         updates = create_subgrid_updates(G)
-        solver = SubGridSolver(G, updates)
+        solver = Solver(updates, hsg=True)
     else:
         updates = CPUUpdates(G)
         solver = Solver(updates)
@@ -61,7 +60,7 @@ class Solver:
 
     """Generic solver for Update objects"""
 
-    def __init__(self, updates):
+    def __init__(self, updates, hsg=False):
         """Context for the model to run in. Sub-class this with contexts
         i.e. an MPI context.
 
@@ -70,6 +69,7 @@ class Solver:
             iterator (iterator): can be range() or tqdm()
         """
         self.updates = updates
+        self.hsg = hsg
 
     def get_G(self):
         return self.updates.G
@@ -78,15 +78,18 @@ class Solver:
         """Time step the FDTD model."""
         tsolvestart = timer()
         for iteration in iterator:
-            self.updates.grid.iteration = iteration
             self.updates.store_outputs()
             self.updates.store_snapshots(iteration)
             self.updates.update_magnetic()
             self.updates.update_magnetic_pml()
-            self.updates.update_magnetic_sources(iteration)
+            self.updates.update_magnetic_sources()
+            if self.hsg:
+                self.updates.hsg_2()
             self.updates.update_electric_a()
             self.updates.update_electric_pml()
-            self.updates.update_electric_sources(iteration)
+            self.updates.update_electric_sources()
+            if self.hsg:
+                self.updates.hsg_1()
             self.updates.update_electric_b()
 
         tsolve = timer() - tsolvestart

gprMax/subgrids/updates.py

@@ -1,3 +1,20 @@
+# Copyright (C) 2015-2019: The University of Edinburgh
+#                 Authors: Craig Warren and Antonis Giannopoulos
+#
+# This file is part of gprMax.
+#
+# gprMax is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# gprMax is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with gprMax.  If not, see <http://www.gnu.org/licenses/>.
 from ..cython.fields_updates_normal import update_electric
 from ..cython.fields_updates_normal import update_magnetic
 from ..fields_outputs import store_outputs
@@ -16,8 +33,6 @@ import sys
 
 from ..updates import CPUUpdates
 
-
-
 def create_updates(G):
     """Return the solver for the given subgrids."""
     updaters = []
@@ -54,79 +69,6 @@ class SubgridUpdates(CPUUpdates):
         for sg_updater in self.updaters:
             sg_updater.hsg_2()
 
-class SubGridSolver:
-    """Solver for subgridding simulations."""
-
-    """Class to call the various update methods required for an HSG-Subgrid simulation.
-    Multiple subgrids can be updated by adding more subgrid_updater objects to the subgrid_updater
-    array.
-    """
-
-    def __init__(self, G, updates, hsg=True):
-        """
-        Args:
-            G (G): Grid class instance - holds essential parameters
-            describing the model.
-            updates: (list): list of subgrid_updaters used for updating
-            the subgrids
-            hsg (bool): HSG methods for subgrids will not be called if False.
-        """
-        self.G = G
-        self.updates = updates
-        self.hsg = hsg
-
-    def store_snapshots(self):
-        """Store any snapshots."""
-        for snap in self.G.snapshots:
-            if snap.time == self.G.iteration + 1:
-                snap.store(self.G)
-
-    def solve(self, iterations):
-        """Run timestepping."""
-        tsolvestart = perf_counter()
-        self.iterations = iterations
-        # for time step in range(self.G.iterations):
-
-        # The main grid FDTD loop
-        for iteration in self.iterations:
-            self.updates.grid.iteration = iteration
-            self.updates.store_outputs()
-            #self.updates.store_snapshots(iteration)
-            self.updates.update_magnetic()
-            self.updates.update_magnetic_pml()
-            self.updates.update_magnetic_sources(iteration)
-            self.updates.hsg_2()
-            self.updates.update_electric_a()
-            self.updates.update_electric_pml()
-            self.updates.update_electric_sources(iteration)
-            self.updates.hsg_1()
-            self.updates.update_electric_b()
-
-            # Keep track of the index. Required for saving output correctly
-            self.G.iteration = iteration
-
-        # Return the elapsed time
-        tsolve = perf_counter() - tsolvestart
-
-        return tsolve
-
-    def write_snapshots(self, iteration):
-        # Write any snapshots to file
-        for i, snap in enumerate(self.G.snapshots):
-            if snap.time == iteration + 1:
-                snapiters = 36 * (((snap.xf - snap.xs) / snap.dx) * ((snap.yf - snap.ys) / snap.dy) * ((snap.zf - snap.zs) / snap.dz))
-                pbar = tqdm(total=snapiters, leave=False, unit='byte', unit_scale=True, desc='  Writing snapshot file {} of {}, {}'.format(i + 1, len(self.G.snapshots), os.path.split(snap.filename)[1]), ncols=get_terminal_width() - 1, file=sys.stdout, disable=self.G.tqdmdisable)
-
-                # Use this call to print out main grid and subgrids
-                snap.write_vtk_imagedata(self.G.Ex, self.G.Ey, self.G.Ez, self.G.Hx, self.G.Hy, self.G.Hz, self.G, pbar, sub_grids=self.G.subgrids)
-
-                # Use this call to print out the standard grid without subgrid
-                # snap.write_vtk_imagedata(self.G.Ex, self.G.Ey, self.G.Ez, self.G.Hx, self.G.Hy, self.G.Hz, self.G, pbar)
-
-                # Use this call to print out only the subgrid - use in combination with commented code in .multi_cmds/snapshots.py
-                # snap.write_vtk_imagedata_fast(self.grid)
-                pbar.close()
-
 
 class SubgridUpdater(CPUUpdates):
     """Class to handle updating the electric and magnetic fields of an HSG
@@ -139,7 +81,7 @@ class SubgridUpdater(CPUUpdates):
         Args:
             subgrid (SubGrid3d): Subgrid to be updated
             precursors (PrecursorNodes): Precursor nodes associated with
-            the subgrid
+            the subgrid - contain interpolated fields
             G (class): Grid class instance - holds essential parameters
             describing the model.
         """
@@ -169,14 +111,14 @@ class SubgridUpdater(CPUUpdates):
             sub_grid.update_electric_is(precursors)
             self.update_electric_b()
 
-            self.update_sub_grid_electric_sources()
+            self.update_electric_sources()
 
             # STD update, interpolate inc. field in time, apply correction
             self.update_magnetic()
             self.update_magnetic_pml()
             precursors.interpolate_electric_in_time(m)
             sub_grid.update_magnetic_is(precursors)
-            self.update_sub_grid_magnetic_sources()
+            self.update_magnetic_sources()
 
         self.store_outputs()
         self.update_electric_a()
@@ -184,7 +126,7 @@ class SubgridUpdater(CPUUpdates):
         precursors.calc_exact_magnetic_in_time()
         sub_grid.update_electric_is(precursors)
         self.update_electric_b()
-        self.update_sub_grid_electric_sources()
+        self.update_electric_sources()
         sub_grid.update_electric_os(G)
 
     def hsg_2(self):
@@ -205,7 +147,7 @@ class SubgridUpdater(CPUUpdates):
 
             precursors.interpolate_electric_in_time(int(m + sub_grid.ratio / 2 - 0.5))
             sub_grid.update_magnetic_is(precursors)
-            self.update_sub_grid_magnetic_sources()
+            self.update_magnetic_sources()
 
             self.store_outputs()
             self.update_electric_a()
@@ -215,27 +157,11 @@ class SubgridUpdater(CPUUpdates):
             sub_grid.update_electric_is(precursors)
             self.update_electric_b()
 
-            self.update_sub_grid_electric_sources()
+            self.update_electric_sources()
 
         self.update_magnetic()
         self.update_magnetic_pml()
         precursors.calc_exact_electric_in_time()
         sub_grid.update_magnetic_is(precursors)
-        self.update_sub_grid_magnetic_sources()
+        self.update_magnetic_sources()
         sub_grid.update_magnetic_os(G)
-
-    def update_sub_grid_electric_sources(self):
-        """Update any electric sources in the subgrid"""
-        sg = self.grid
-        for source in sg.voltagesources + sg.transmissionlines + sg.hertziandipoles:
-            source.update_electric(self.source_iteration, sg.updatecoeffsE, sg.ID,
-                                   sg.Ex, sg.Ey, sg.Ez, sg)
-        self.source_iteration += 1
-        self.grid.iteration = self.source_iteration
-
-    def update_sub_grid_magnetic_sources(self):
-        """Update any magnetic sources in the subgrid"""
-        sg = self.grid
-        for source in sg.transmissionlines + sg.magneticdipoles:
-            source.update_magnetic(self.source_iteration, sg.updatecoeffsH, sg.ID,
-                                   sg.Hx, sg.Hy, sg.Hz, sg)

gprMax/subgrids/user_objects.py

@@ -45,22 +45,12 @@ class SubGridBase(UserObjectMulti):
 
     def set_main_grid_indices(self, sg, grid, uip, p1, p2):
         """Set subgrid indices related to main grid placement."""
-        # Main grid indices of the sub grid. These are dummy indices. They are
+        # location of the IS
-        # not user internal except for printing to the user
+        sg.i0, sg.j0, sg.k0 = p1
-        sg.i0_u, sg.j0_u, sg.k0_u = p1
+        sg.i1, sg.j1, sg.k1 = p2
-        sg.i1_u, sg.j1_u, sg.k1_u = p2
 
-        # The actual sub gridded area (IS index) is 4 cells in
+        sg.x1, sg.y1, sg.z1 = uip.round_to_grid(p1)
-        sg.i0, sg.j0, sg.k0 = np.add([sg.i0_u, sg.j0_u, sg.k0_u], sg.is_os_sep)
+        sg.x2, sg.y2, sg.z2 = uip.round_to_grid(p2)
-        sg.i1, sg.j1, sg.k1 = np.subtract([sg.i1_u, sg.j1_u, sg.k1_u], sg.is_os_sep)
-
-        # Main grid indices of the sub grid. These are dummy indices. They are
-        # not user internal except for printing to the user
-        sg.x1_u, sg.y1_u, sg.z1_u = uip.round_to_grid(p1)
-        sg.x2_u, sg.y2_u, sg.z2_u = uip.round_to_grid(p2)
-
-        sg.x1, sg.y1, sg.z1 = np.add([sg.x1_u, sg.y1_u, sg.z1_u], sg.is_os_sep * sg.dx)
-        sg.x2, sg.y2, sg.z2 = np.subtract([sg.x2_u, sg.y2_u, sg.z2_u], sg.is_os_sep * sg.dx)
 
     def set_name(self, sg):
         sg.name = self.kwargs['id']

gprMax/updates.py

@@ -59,10 +59,10 @@ class CPUUpdates:
         for pml in self.grid.pmls:
             pml.update_magnetic(self.grid)
 
-    def update_magnetic_sources(self, iteration):
+    def update_magnetic_sources(self):
         # Update magnetic field components from sources
         for source in self.grid.transmissionlines + self.grid.magneticdipoles:
-            source.update_magnetic(iteration,
+            source.update_magnetic(self.grid.iteration,
                                    self.grid.updatecoeffsH,
                                    self.grid.ID,
                                    self.grid.Hx,
@@ -113,10 +113,11 @@ class CPUUpdates:
         for pml in self.grid.pmls:
             pml.update_electric(self.grid)
 
-    def update_electric_sources(self, iteration):
+    def update_electric_sources(self):
         # Update electric field components from sources (update any Hertzian dipole sources last)
         for source in self.grid.voltagesources + self.grid.transmissionlines + self.grid.hertziandipoles:
-            source.update_electric(iteration, self.grid.updatecoeffsE, self.grid.ID, self.grid.Ex, self.grid.Ey, self.grid.Ez, self.grid)
+            source.update_electric(self.grid.iteration, self.grid.updatecoeffsE, self.grid.ID, self.grid.Ex, self.grid.Ey, self.grid.Ez, self.grid)
+        self.grid.iteration += 1
 
     def update_electric_b(self):
         # If there are any dispersive materials do 2nd part of dispersive update