First working(ie. non crashing) version.

examples/test_prefab_meeting/entity.py

@@ -2,20 +2,69 @@
 
 import Sofa
 import dataclasses
+
+def addBidule(self):
+    return self.addChild("Bidule") 
 
+DEFAULT_VALUE = object()
 
-class VisualModel(Sofa.Core.BasePrefab):
-    def __init__(self, params, **kwargs):
-        Sofa.Core.Node.__init__(self, **kwargs)
+def NONE(*args, **kwargs):
+    pass
 
-    class Parameters(object):
-        enabled : bool  
-        filename : str
+def to_dict(o):
+    if isinstance(o, dict):
+        return o
+    if hasattr(o, "to_dict"):
+        return o.to_dict()
+    return {}
+
+@dataclasses.dataclass
+class PrefabParameters(object): 
+    name : str = "Prefab"
+    kwargs : dict = dataclasses.field(default_factory=dict)
+
+    def __getattr__(self, name: str) :
+        if name == "__getstate__":
+            getattr(PrefabParameters, "__getstate__")
+        if name == "__setstate__":
+            getattr(PrefabParameters, "__setstate__")
+
+        try: 
+            a =  self.__getattribute__(name)
+        except Exception as e: 
+            return NONE
+        return a
+
+    def to_dict(self):
+        return dataclasses.asdict(self)
+
+@dataclasses.dataclass
+class VisualModelParameters(PrefabParameters):
+    name : str = "VisualModel"
+
+    filename : str = "mesh/sphere_02.obj"
+
+    renderer : dict = dataclasses.field(default_factory=dict)
+    mapping : dict = dataclasses.field(default_factory=dict)
+
+class VisualModel(Sofa.Core.Node):
+
+    def __init__(self, parent=None, parameters : VisualModelParameters = VisualModelParameters()):
+        Sofa.Core.Node.__init__(self, name=parameters.name)
 
-    class DefaultParameters(object):
-        enabled : bool  
-        filename : str
+        if parent != None:
+            parent.addChild(self)
 
+        self.addObject("MeshOBJLoader", name="loader", filename=parameters.filename)
+        self.addRenderer(**to_dict(parameters.renderer) | {"src" : "@loader"} )
+        self.addMapping(**to_dict(parameters.mapping) )
+
+    def addRenderer(self, **kwargs):
+        self.addObject("OglModel", name="renderer", **kwargs)
+
+    def addMapping(self, **kwargs):
+        self.addObject("RigidMapping", name="mapping", **kwargs)
+
 class CollisionModel(Sofa.Core.BasePrefab):
     def __init__(self, params, **kwargs):
         Sofa.Core.Node.__init__(self, **kwargs)
@@ -33,133 +82,107 @@ class Parameters(object):
         def to_dict(self):
             return dataclasses.asdict(self)
 
-
-def addBidule(self):
-    return self.addChild("Bidule") 
 
+@dataclasses.dataclass
+class SimulationParameters(PrefabParameters):
+    name : str = "Simulation"
+    iterations : Optional[int] = None 
+    template: Optional[str] = None 
+    solver : dict = dataclasses.field(default_factory=dict)
+    integration : dict = dataclasses.field(default_factory=dict)
 
-class Entity(Sofa.Core.Prefab):
-    def __init__(self, **kwargs):
-        self.addChild(VisualModel(**kwargs), name="visual")
-        self.addChild(CollisionModel(**kwargs), name="visual")
+    def to_dict(self):
+        return self.asdict() 
 
-    def addConstitutiveLaw(self):
-        pass 
+class Simulation(Sofa.Core.Node):
+    solver : Sofa.Core.Object 
+    integration : Sofa.Core.Object
+    iterations : int
 
-    def addSolver(self):
-        pass 
+    def __init__(self, parent : Sofa.Core.Node = None, parameters : SimulationParameters = SimulationParameters()):
+        Sofa.Core.Node.__init__(self, name=parameters.name)
+        if parent is not None:
+            parent.addChild(self)
+
+        if parameters.iterations != NONE and "iterations" in parameters.solver:
+            raise Exception("Cannot set direct attribute and internal hack... ")
 
-DEFAULT_VALUE = object()
+        self.addObject("EulerImplicitSolver", name = "integration", **to_dict(parameters.integration))
+        self.addObject("CGLinearSolver", name = "solver", iterations=parameters.iterations, **to_dict(parameters.solver))
+
 
-def addSolver(node : Sofa.Core.Node, template=DEFAULT_VALUE, numiterations=DEFAULT_VALUE, **kwargs):
-    node.addObject("ODESolver", name = "integrationscheme",numiterations = numiterations, **kwargs)
-    node.addObject("LinearSolver", name = "numericalsolver", template=DEFAULT_VALUE, **kwargs)
 
 #@dataclasses.dataclass
 #class Solver(object):
 #    integrationscheme : str
 #    numericalsolver : str
 
 @dataclasses.dataclass
-class SolverParameters(object):
-    numiteration : int | object = DEFAULT_VALUE
-    template: str | object = DEFAULT_VALUE
+class EntityParameters(PrefabParameters): 
+        name : str = "Entity"
 
-    kwargs : dict = {"intergrato"} 
+        addSimulation : Callable = Simulation
+        addCollisionModel : Callable = CollisionModel
+        addVisualModel : Callable = VisualModel 
 
-    def to_dict(self):
-        return self.asdict() | self.kwargs
-
-class Entity(Sofa.Core.Prefab): 
+        #setConstitutiveLaw # : Callable = addBidule
+        #setBoundaryCondition #: Callable = addBidule
+
+        mechanical : dict = dataclasses.field(default_factory=dict)
+        collision : CollisionModel.Parameters = CollisionModel.Parameters()
+        visual : VisualModelParameters = VisualModelParameters()
+        simulation : SimulationParameters = SimulationParameters()
+
+class Entity(Sofa.Core.Node): 
     # A simulated object
+    simulation : Simulation
     visual : VisualModel
     collision : CollisionModel
-
+    
     parameters : EntityParameters
 
-    addSolver : PrefabMethod 
+    def __init__(self, parent=None, parameters=EntityParameters(), **kwargs):
+        Sofa.Core.Node.__init__(self, name=parameters.name)        
 
-    def __init__(self, params):        
-        self.params = params 
+        if parent is not None: 
+            parent.addChild(self)
 
-        self.addChild(VisualModel(params.visual), name="visual")
+        self.parameters = parameters
 
-        self.addSolver()
+        self.addMechanicalModel(**parameters.mechanical)
+        self.addSimulation(parameters=parameters.simulation)
+        self.addVisualModel(parameters=parameters.visual)
         self.addCollisionModel()
 
-    #@staticmethod
-    #def addSolver(self): 
-    #    pass 
+    def addMechanicalModel(self, **kwargs): 
+        self.addObject("MechanicalObject", **kwargs)
 
-    #def defaultAddSolver(self):
-    #    pass
+    def addSimulation(self, **kwargs): 
+        self.parameters.addSimulation(self, **kwargs)
+
+    def addVisualModel(self, **kwargs):
+        self.parameters.addVisualModel(self, **kwargs)
 
-    @prefab.method
     def addCollisionModel(self):
         pass 
 
-@dataclasses.dataclass
-class EntityParameters(object): 
-        addSolver : Callable = addSolver
-        setConstitutiveLaw # : Callable = addBidule
-        setBoundaryCondition #: Callable = addBidule
-
-        addCollisionModel : CollisionModel
-
-        #mechanical : MechanicalObject.Parameters = MechanicalObject.Parameters()
-        collision : CollisionModel.Parameters = CollisionModel.Parameters()
-        visual : VisualModel.Parameters = VisualModel.Parameters()
-        solver : SolverParameters = SolverParameters()
-
-        kwargs : dict = {} 
-        def to_dict(self):
-            return dataclasses.asdict(self)
-
-
 class Rigid(Entity):
     def __init__(self, **kwargs):
         Entity.__init__(self, **kwargs)    
 
-    class Parameters(Entity.Parameters): 
-        pass
 
 class Deformable(Entity):
     def __init__(self, **kwargs):
         Entity.__init__(self, **kwargs)    
-
-    class Parameters(Entity.Parameters): 
-        addConstitutiveLaw : Callable
-        mass = 3.4
-        name = "Deformable"
-
-        def to_dict(self):
-            return dataclasses.asdict(self)
 
+@dataclasses.dataclass
+class DeformableEntityParameters(EntityParameters):     
+    addConstitutiveLaw : Callable = lambda x: x
 
-Entity.Rigid = Rigid
-Entity.Deformable = Deformable
-
-class SoftRobots:
-    class Cable(Sofa.Core.BasePrefab):
-        length : float 
-
-        def __init__(self,**kwargs):
-            pass
-
-        def Parameters(object):
-            lenght : float    
+    mass : Optional[float] = None    
 
-class Trunk(Sofa.Core.BasePrefab):
-    body : Entity.Deformable
-    cables : list [SoftRobots.Cable]
-
-    def __init__(self, params):
-        body = Entity.Deformable()
+    def to_dict(self):
+        return dataclasses.asdict(self)
 
-        for param in range(params.cables):
-            cables.append(SoftRobots.Cable(body, param))
 
-    class Parameters(object):
-        body : Entity.Deformable.Parameters
-        cables : list[SoftRobots.Cable.Parameters]
 

examples/test_prefab_meeting/softrobots.py

@@ -0,0 +1,23 @@
+class SoftRobots:
+    class Cable(Sofa.Core.BasePrefab):
+        length : float 
+
+        def __init__(self,**kwargs):
+            pass
+
+        def Parameters(object):
+            lenght : float    
+
+class Trunk(Sofa.Core.BasePrefab):
+    body : Entity.Deformable
+    cables : list [SoftRobots.Cable]
+
+    def __init__(self, params):
+        body = Entity.Deformable()
+
+        for param in range(params.cables):
+            cables.append(SoftRobots.Cable(body, param))
+
+    class Parameters(object):
+        body : Entity.Deformable.Parameters
+        cables : list[SoftRobots.Cable.Parameters]

examples/test_prefab_meeting/test2.py

@@ -0,0 +1,65 @@
+import Sofa.Core
+import copy
+import entity
+from entity import PrefabParameters, EntityParameters, Entity, Simulation
+
+
+oldAdd=Sofa.Core.Node.addObject
+def myAddObject(self : Sofa.Core.Node, tname, **kwargs):
+    kwargs = copy.copy(kwargs)
+    previouslen = len(self.objects) 
+    try:
+        oldAdd(self, tname, **kwargs)
+    except Exception as e:
+        target = self
+        if len(self.objects) != previouslen:
+            target = list(self.objects)[-1]
+        Sofa.msg_error(target, str(e))
+
+Sofa.Core.Node.addObject = myAddObject
+
+
+def myAdd(self : Sofa.Core.Node, c, params = PrefabParameters(), **kwargs):  
+    def findName(cname, node):
+        """Compute a working unique name in the node"""
+        rname = cname 
+        for i in range(0, len(node.children)):
+            if rname not in node.children:
+                return rname
+            rname = cname + str(i+1)
+        return rname
+
+    for k,v in kwargs.items():
+        if hasattr(params, k):
+            setattr(params, k, v)
+
+    params = copy.copy(params)
+    if params.name in self.children:
+        params.name = findName(params.name, self)
+
+    return c(parent = self, parameters=params) 
+Sofa.Core.Node.add = myAdd
+
+def createScene(root):
+    #@optionalkwargs
+
+    #def eulalieAddOde(self, **kwargs):
+    #    self.addObject("EulerExplicitSolver", name="numericalintegration")
+    #    self.addObject("LinearSolver", name="numericalsolver", firstOrder=True) 
+
+    params = EntityParameters()
+    params.simulation.iterations = 10
+    params.simulation.integration["rayleighStiffness"] = 2.0
+    params.addSimulation = entity.NONE
+
+    params.mechanical["template"] = "Rigid3"
+
+    #params.simulation.integration["rayleightStiffnessXXX"] = 2.0
+
+    #params.solver.kwargs["numericalintegration"] = { "firstOrder" : True }
+
+    root.add(Entity, params)
+    root.add(Entity, params)
+    root.add(Entity, params)
+
+    #root.add(Simulation, name="mySimulation")