FEM: multiple solver are possible in one analysis, use the selected for calculation run

src/Mod/Fem/FemTools.py

@@ -37,7 +37,7 @@ class FemTools(QtCore.QRunnable, QtCore.QObject):
     #  "__init__" tries to use current active analysis in analysis is left empty.
     #  Rises exception if analysis is not set and there is no active analysis
     #  The constructur of FemTools is for use of analysis without solver object
-    def __init__(self, analysis=None):
+    def __init__(self, analysis=None, solver=None):
 
         if analysis:
             ## @var analysis
@@ -47,6 +47,12 @@ class FemTools(QtCore.QRunnable, QtCore.QObject):
         else:
             import FemGui
             self.analysis = FemGui.getActiveAnalysis()
+        if solver:
+            ## @var solver
+            #  solver of the analysis. Used to store the active solver and analysis parameters
+            self.solver = solver
+        else:
+            self.solver = None
         if self.analysis:
             self.update_objects()
             self.results_present = False
@@ -106,6 +112,7 @@ class FemTools(QtCore.QRunnable, QtCore.QObject):
             self.reset_mesh_color()
             return
         if self.result_object:
+            if FreeCAD.GuiUp:
                 if self.result_object.Mesh.ViewObject.Visibility is False:
                     self.result_object.Mesh.ViewObject.Visibility = True
             if result_type == "Sabs":
@@ -147,9 +154,6 @@ class FemTools(QtCore.QRunnable, QtCore.QObject):
         # [{'Object':beam_sections, 'xxxxxxxx':value}, {}, ...]
         # [{'Object':shell_thicknesses, 'xxxxxxxx':value}, {}, ...]
 
-        ## @var solver
-        #  solver of the analysis. Used to store solver and analysis parameters
-        self.solver = None
         ## @var mesh
         #  mesh of the analysis. Used to generate .inp file and to show results
         self.mesh = None
@@ -182,12 +186,22 @@ class FemTools(QtCore.QRunnable, QtCore.QObject):
         # Individual displacement_constraints are Proxy.Type "FemConstraintDisplacement"
         self.displacement_constraints = []
 
+        found_solver_for_use = False
         for m in self.analysis.Member:
             if m.isDerivedFrom("Fem::FemSolverObjectPython"):
-                if not self.solver:
+                # for some methods no solver is needed (purge_results) --> solver could be none
+                # analysis has one solver and no solver was set --> use the one solver
+                # analysis has more than one solver and no solver was set --> use solver none
+                # analysis has no solver --> use solver none
+                if not found_solver_for_use and not self.solver:
+                    # no solver was found before and no solver was set by constructor
                     self.solver = m
-                else:
-                    raise Exception('FEM: Multiple solver in analysis not yet supported!')
+                    found_solver_for_use = True
+                elif found_solver_for_use:
+                    self.solver = None
+                    # another solver was found --> We have more than one solver
+                    # we do not know which one to use, so we use none !
+                    # print('FEM: More than one solver in the analysis and no solver given to analys. No solver is set!')
             elif m.isDerivedFrom("Fem::FemMeshObject"):
                 if not self.mesh:
                     self.mesh = m

src/Mod/Fem/FemToolsCcx.py

@@ -42,7 +42,7 @@ class FemToolsCcx(FemTools.FemTools):
     #  @param test_mode - True indicates that no real calculations will take place, so ccx bianry is not required. Used by test module.
     #  "__init__" tries to use current active analysis in analysis is left empty.
     #  Rises exception if analysis is not set and there is no active analysis
-    def __init__(self, analysis=None, test_mode=False):
+    def __init__(self, analysis=None, solver=None, test_mode=False):
         QtCore.QRunnable.__init__(self)
         QtCore.QObject.__init__(self)
         if analysis:
@@ -53,6 +53,12 @@ class FemToolsCcx(FemTools.FemTools):
         else:
             import FemGui
             self.analysis = FemGui.getActiveAnalysis()
+        if solver:
+            ## @var solver
+            #  solver of the analysis. Used to store the active solver and analysis parameters
+            self.solver = solver
+        else:
+            self.solver = None
         if self.analysis:
             self.update_objects()
             ## @var base_name

src/Mod/Fem/FemToolsZ88.py

@@ -40,7 +40,7 @@ class FemToolsZ88(FemTools.FemTools):
     #  @param analysis - analysis object to be used as the core object.
     #  "__init__" tries to use current active analysis in analysis is left empty.
     #  Rises exception if analysis is not set and there is no active analysis
-    def __init__(self, analysis=None, test_mode=False):
+    def __init__(self, analysis=None, solver=None, test_mode=False):
         if analysis:
             ## @var analysis
             #  FEM analysis - the core object. Has to be present.
@@ -49,6 +49,12 @@ class FemToolsZ88(FemTools.FemTools):
         else:
             import FemGui
             self.analysis = FemGui.getActiveAnalysis()
+        if solver:
+            ## @var solver
+            #  solver of the analysis. Used to store the active solver and analysis parameters
+            self.solver = solver
+        else:
+            self.solver = None
         if self.analysis:
             self.update_objects()
             self.base_name = ""

src/Mod/Fem/TestFem.py

@@ -202,7 +202,7 @@ class FemTest(unittest.TestCase):
         self.assertTrue(self.pressure_constraint, "FemTest of new pressure constraint failed")
         self.analysis.Member = self.analysis.Member + [self.pressure_constraint]
 
-        fea = FemToolsCcx.FemToolsCcx(self.analysis, test_mode=True)
+        fea = FemToolsCcx.FemToolsCcx(self.analysis, self.solver_object, test_mode=True)
         fcc_print('Setting up working directory {}'.format(static_analysis_dir))
         fea.setup_working_dir(static_analysis_dir)
         self.assertTrue(True if fea.working_dir == static_analysis_dir else False,

src/Mod/Fem/_CommandRunSolver.py

@@ -51,9 +51,12 @@ class _CommandRunSolver(FemCommands):
             else:
                 print ("CalculiX failed ccx finished with error {}".format(ret_code))
 
-        if FreeCADGui.Selection.getSelection()[0].SolverType == "FemSolverCalculix":
+        sel = FreeCADGui.Selection.getSelection()
+        if len(sel) == 1 and sel[0].isDerivedFrom("Fem::FemSolverObjectPython"):
+            self.solver = sel[0]
+        if self.solver.SolverType == "FemSolverCalculix":
             import FemToolsCcx
-            self.fea = FemToolsCcx.FemToolsCcx()
+            self.fea = FemToolsCcx.FemToolsCcx(None, self.solver)
             self.fea.reset_mesh_purge_results_checked()
             message = self.fea.check_prerequisites()
             if message:
@@ -61,9 +64,9 @@ class _CommandRunSolver(FemCommands):
                 return
             self.fea.finished.connect(load_results)
             QtCore.QThreadPool.globalInstance().start(self.fea)
-        elif FreeCADGui.Selection.getSelection()[0].SolverType == "FemSolverZ88":
+        elif self.solver.SolverType == "FemSolverZ88":
             import FemToolsZ88
-            self.fea = FemToolsZ88.FemToolsZ88()
+            self.fea = FemToolsZ88.FemToolsZ88(None, self.solver)
             self.fea.reset_mesh_purge_results_checked()
             message = self.fea.check_prerequisites()
             if message:

src/Mod/Fem/_CommandSolverCalculix.py

@@ -41,7 +41,7 @@ class _CommandSolverCalculix(FemCommands):
                           'MenuText': QtCore.QT_TRANSLATE_NOOP("Fem_SolverCalculix", "Solver CalculiX"),
                           'Accel': "S, C",
                           'ToolTip': QtCore.QT_TRANSLATE_NOOP("Fem_SolverCalculix", "Creates a FEM solver CalculiX")}
-        self.is_active = 'with_analysis_without_solver'
+        self.is_active = 'with_analysis'
 
     def Activated(self):
         FreeCAD.ActiveDocument.openTransaction("Create SolverCalculix")

src/Mod/Fem/_CommandSolverZ88.py

@@ -41,7 +41,7 @@ class _CommandSolverZ88(FemCommands):
                           'MenuText': QtCore.QT_TRANSLATE_NOOP("Fem_SolverZ88", "Solver Z88"),
                           'Accel': "S, Z",
                           'ToolTip': QtCore.QT_TRANSLATE_NOOP("Fem_SolverZ88", "Creates a FEM solver Z88")}
-        self.is_active = 'with_analysis_without_solver'
+        self.is_active = 'with_analysis'
 
     def Activated(self):
         FreeCAD.ActiveDocument.openTransaction("Create SolverZ88")

src/Mod/Fem/_TaskPanelFemSolverCalculix.py

@@ -141,7 +141,7 @@ class _TaskPanelFemSolverCalculix:
         self.form.pb_run_ccx.setText("Re-run CalculiX")
         self.femConsoleMessage("Loading result sets...")
         self.form.l_time.setText('Time: {0:4.1f}: '.format(time.time() - self.Start))
-        fea = FemToolsCcx.FemToolsCcx()
+        fea = FemToolsCcx.FemToolsCcx(None, self.solver_object)
         fea.reset_mesh_purge_results_checked()
         fea.inp_file_name = self.inp_file_name
         QApplication.setOverrideCursor(Qt.WaitCursor)
@@ -182,7 +182,7 @@ class _TaskPanelFemSolverCalculix:
         if self.check_prerequisites_helper():
             QApplication.setOverrideCursor(Qt.WaitCursor)
             self.inp_file_name = ""
-            fea = FemToolsCcx.FemToolsCcx()
+            fea = FemToolsCcx.FemToolsCcx(None, self.solver_object)
             fea.set_analysis_type(self.solver_object.AnalysisType)
             fea.update_objects()
             fea.write_inp_file()
@@ -200,7 +200,7 @@ class _TaskPanelFemSolverCalculix:
         self.femConsoleMessage("Check dependencies...")
         self.form.l_time.setText('Time: {0:4.1f}: '.format(time.time() - self.Start))
 
-        fea = FemToolsCcx.FemToolsCcx()
+        fea = FemToolsCcx.FemToolsCcx(None, self.solver_object)
         fea.update_objects()
         message = fea.check_prerequisites()
         if message != "":