Get Mass Properties of Multibody Assembly Component Example (C#)
This example shows how to get the mass properties of a multibody assembly
component in which an assembly cut-extrude feature is created.
NOTES:
-
An assembly
component, i.e., a part or subassembly, can contain
one or more assembly-level features. Some types of assembly features, e.g.,
cut extrude, can affect the mass properties.
Assembly features are not present in the part or subassembly.
-
Mass property
values returned are relative to the
component origin, not the assembly origin.
//---------------------------------------------------------------
// Preconditions:
// 1. Verify that the specified multibody part document
// and assembly document template exist.
// 2. Open the Immediate window.
//
// Postconditions:
// 1. Opens the specified multibody part document.
// 2. Creates an assembly using the specified multibody
// part document.
// 3. Creates an assembly cut-extrude feature.
// 4. Selects the multibody component.
// 5. Gets the mass property values of the multibody
// component.
// 6. Examine the Immediate window.
//
// NOTE: Because the part is used elsewhere, do not save changes.
//---------------------------------------------------------------
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Runtime.InteropServices;
using System;
using System.Diagnostics;
namespace Macro1CSharp.csproj
{
public partial class SolidWorksMacro
{
public void Main()
{
ModelDoc2 swModel = default(ModelDoc2);
AssemblyDoc swAssembly = default(AssemblyDoc);
ModelDocExtension swDocExt = default(ModelDocExtension);
MassProperty swMass = default(MassProperty);
SelectionMgr swSelMgr = default(SelectionMgr);
Component2 swComp = default(Component2);
SketchManager swSketchMgr = default(SketchManager);
SketchSegment swSketchSegment = default(SketchSegment);
FeatureManager swFeatMgr = default(FeatureManager);
Feature swFeat = default(Feature);
object vBodyInfo = null;
double[] vCoM = null;
double[] vMoI = null;
double[] vPrinAoIx = null;
double[] vPrinAoIy = null;
double[] vPrinAoIz = null;
double[] vPrinMoI = null;
bool bRet = false;
int errors = 0;
int warnings = 0;
//Open multibody part document and create an assembly
swModel = (ModelDoc2)swApp.OpenDoc6("C:\\Users\\Public\\Documents\\SOLIDWORKS\\SOLIDWORKS 2017\\tutorial\\multibody\\multi_inter.sldprt", (int)swDocumentTypes_e.swDocPART, (int)swOpenDocOptions_e.swOpenDocOptions_Silent, "", ref errors, ref warnings);
swModel = (ModelDoc2)swApp.NewDocument("C:\\ProgramData\\SolidWorks\\SolidWorks 2017\\templates\\Assembly.asmdot", 0, 0, 0);
swAssembly = (AssemblyDoc)swModel;
swComp = (Component2)swAssembly.AddComponent5("C:\\Users\\Public\\Documents\\SOLIDWORKS\\SOLIDWORKS 2017\\tutorial\\multibody\\multi_inter.sldprt", (int)swAddComponentConfigOptions_e.swAddComponentConfigOptions_CurrentSelectedConfig, "", false, "", -9.26777909171506E-05, 0, 4.8904806817518E-05);
//Create an assembly cut-extrude feature
swDocExt = (ModelDocExtension)swModel.Extension;
swSketchMgr = (SketchManager)swModel.SketchManager;
swFeatMgr = (FeatureManager)swModel.FeatureManager;
bRet = swDocExt.SelectByID2("", "FACE", -0.0195381300573558, 0.0449999999998454, -0.00303401890568011, false, 0, null, 0);
swModel.ClearSelection2(true);
swSketchSegment = (SketchSegment)swSketchMgr.CreateCircle(0.0, 0.0, 0.0, 0.002956, -0.004701, 0.0);
swModel.ClearSelection2(true);
bRet = swDocExt.SelectByID2("Arc1", "SKETCHSEGMENT", 0, 0, 0, false, 0, null, 0);
swFeat = (Feature)swFeatMgr.FeatureCut3(true, false, false, 0, 0, 0.5, 0.00254, false, false, false,
false, 0.0174532925199433, 0.0174532925199433, false, false, false, false, false, true, true,
true, true, false, 0, 0, false);
swSelMgr = (SelectionMgr)swModel.SelectionManager;
swSelMgr.EnableContourSelection = false;
//Select multibody component
bRet = swDocExt.SelectByID2("multi_inter-1@Assem1", "COMPONENT", 0, 0, 0, false, 0, null, 0);
swMass = (MassProperty)swDocExt.CreateMassProperty();
swComp = (Component2)swSelMgr.GetSelectedObjectsComponent4(1, -1);
object[] vBodies = new object[1];
vBodies = (object[])swComp.GetBodies3((int)swBodyType_e.swSolidBody, out vBodyInfo);
DispatchWrapper[] dispArray = ObjectArrayToDispatchWrapperArray(vBodies);
bRet = swMass.AddBodies((dispArray));
//Get mass properties of selected component's bodies
vCoM = (double[])swMass.CenterOfMass;
vMoI = (double[])swMass.GetMomentOfInertia((int)swMassPropertyMoment_e.swMassPropertyMomentAboutCenterOfMass);
vPrinAoIx = (double[])swMass.get_PrincipleAxesOfInertia(0);
vPrinAoIy = (double[])swMass.get_PrincipleAxesOfInertia(1);
vPrinAoIz = (double[])swMass.get_PrincipleAxesOfInertia(2);
vPrinMoI = (double[])swMass.PrincipleMomentsOfInertia;
Debug.Print("Component = " + swComp.Name2);
Debug.Print("Configuration = " + swComp.ReferencedConfiguration);
Debug.Print("Density = " + swMass.Density + " kg/m^3");
Debug.Print("");
Debug.Print("Center of mass = (" + vCoM[0] * 1000.0 + ", " + vCoM[1] * 1000.0 + ", " + vCoM[2] * 1000.0 + ") mm");
Debug.Print("Volume = " + swMass.Volume * 1000000000.0 + " mm^3");
Debug.Print("Area = " + swMass.SurfaceArea * 1000000.0 + " mm^2");
Debug.Print("Mass = " + swMass.Mass + " kg");
Debug.Print("Principle axes of inertia ");
Debug.Print(" Ix = (" + vPrinAoIx[0] + ", " + vPrinAoIx[1] + ", " + vPrinAoIx[2] + ")");
Debug.Print(" Iy = (" + vPrinAoIy[0] + ", " + vPrinAoIy[1] + ", " + vPrinAoIy[2] + ")");
Debug.Print(" Iz = (" + vPrinAoIz[0] + ", " + vPrinAoIz[1] + ", " + vPrinAoIz[2] + ")");
Debug.Print("Principle moments of inertia");
Debug.Print(" Px = " + vPrinMoI[0] + " kg*m^2");
Debug.Print(" Py = " + vPrinMoI[1] + " kg*m^2");
Debug.Print(" Pz = " + vPrinMoI[2] + " kg*m^2");
Debug.Print("Products of inerita");
Debug.Print(" Lxx = " + vMoI[0] + " kg*m^2");
Debug.Print(" Lxy = " + vMoI[1] + " kg*m^2");
Debug.Print(" Lxz = " + vMoI[2] + " kg*m^2");
Debug.Print(" Lyx = " + vMoI[3] + " kg*m^2");
Debug.Print(" Lyy = " + vMoI[4] + " kg*m^2");
Debug.Print(" Lyz = " + vMoI[5] + " kg*m^2");
Debug.Print(" Lzx = " + vMoI[6] + " kg*m^2");
Debug.Print(" Lzy = " + vMoI[7] + " kg*m^2");
Debug.Print(" Lzz = " + vMoI[8] + " kg*m^2");
}
public DispatchWrapper[] ObjectArrayToDispatchWrapperArray(object[] Objects)
{
int ArraySize = 0;
ArraySize = Objects.GetUpperBound(0);
DispatchWrapper[] d = new DispatchWrapper[ArraySize + 1];
int ArrayIndex = 0;
for (ArrayIndex = 0; ArrayIndex <= ArraySize; ArrayIndex++)
{
d[ArrayIndex] = new DispatchWrapper(Objects[ArrayIndex]);
}
return d;
}
/// <summary>
/// The SldWorks swApp variable is pre-assigned for you.
/// </summary>
public SldWorks swApp;
}
}