the need to provide neighborLength in domain dictionary is lifted. Now it is optional

DEMSystems/sphereDEMSystem/sphereDEMSystem.cpp

@@ -74,13 +74,19 @@ pFlow::sphereDEMSystem::sphereDEMSystem(
 	property_ = makeUnique<property>(
 		propertyFile__,
     	Control().caseSetup().path());
+		
 
 	REPORT(0)<< "\nCreating surface geometry for sphereDEMSystem . . . "<<END_REPORT;
 	geometry_ = geometry::create(Control(), Property());
 
+	REPORT(0)<<"Reading shapes dictionary..."<<END_REPORT;
+	spheres_ = makeUnique<sphereShape>(
+		pFlow::shapeFile__, 
+		&Control().caseSetup(), 
+		Property());
 
 	REPORT(0)<<"\nReading sphere particles . . ."<<END_REPORT;
-	particles_ = makeUnique<sphereFluidParticles>(Control(), Property());
+	particles_ = makeUnique<sphereFluidParticles>(Control(), spheres_());
 
 
 	insertion_ = makeUnique<sphereInsertion>( 

DEMSystems/sphereDEMSystem/sphereDEMSystem.hpp

@@ -46,6 +46,8 @@ protected:
 
 	uniquePtr<geometry> 			geometry_ = nullptr;
 
+	uniquePtr<sphereShape> 			spheres_  = nullptr;
+
 	uniquePtr<sphereFluidParticles> particles_ = nullptr;
 
 	uniquePtr<sphereInsertion> 		insertion_ = nullptr;

DEMSystems/sphereDEMSystem/sphereFluidParticles.cpp

@@ -32,8 +32,8 @@ void pFlow::sphereFluidParticles::checkHostMemory()
 
 pFlow::sphereFluidParticles::sphereFluidParticles(
     systemControl &control,
-    const property &prop)
-    : sphereParticles(control, prop),
+    const sphereShape& shpShape)
+    : sphereParticles(control, shpShape),
       fluidForce_(
           objectFile(
               "fluidForce",

DEMSystems/sphereDEMSystem/sphereFluidParticles.hpp

@@ -66,7 +66,7 @@ protected:
 public:
 
 	/// construct from systemControl and property 
-	sphereFluidParticles(systemControl &control, const property& prop);
+	sphereFluidParticles(systemControl &control, const sphereShape& shpShape);
 	
 	/// before iteration step 
 	bool beforeIteration() override;