C# Solidworks二次开发：获取模型、组件、主体的表面积相关API详解

大家好，今天要介绍模型、组件、主体的表面积相关API。

下面是今天要介绍的API:

（1）第一个为SurfaceArea Property (IMassProperty)，这个API的含义为获取此模型的表面积，下面是官方的具体解释：

其没有输入参数值，返回值为表面积。

下面是官方使用的例子：

This example shows how to get and override some mass properties of a part.

// -----------------------------------------------------------------------

// Preconditions:

// 1. Ensure the specified document exists.

// 2. Open the Immediate window.

// Postconditions: Inspect the Immediate window.

// ----------------------------------------------------------------------

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Forms;

using SolidWorks.Interop.sldworks;

using SolidWorks.Interop.swconst;

using System.Diagnostics;

namespace MassProperty2_CSharp

{

partial class SolidWorksMacro

{

private ModelDocExtension Extn;

private MassProperty2 MyMassProp;

private MassPropertyOverrideOptions OvProp;

private ModelDoc2 swModelDoc;

private double[] pmoi;

private double[] vValue;

private double[] value = new double[3];

private int errors;

private int warnings;

private double val;

public void Main()

{

swModelDoc = swApp.OpenDoc6(@"C:\Users\Public\Documents\SOLIDWORKS\SOLIDWORKS 2019\samples\tutorial\advdrawings\98food processor.sldasm", (int)swDocumentTypes_e.swDocASSEMBLY, (int)swOpenDocOptions_e.swOpenDocOptions_Silent, "", ref errors, ref warnings);

Extn = swModelDoc.Extension;

// Create mass properties and override options

MyMassProp = (MassProperty2)Extn.CreateMassProperty2();

OvProp = (MassPropertyOverrideOptions)MyMassProp.GetOverrideOptions();

OvProp.OverrideMass = true;

OvProp.SetOverrideMassValue(100);

double[] comArr = new double[9];

comArr[0] = 0.1677;

comArr[1] = 0;

comArr[2] = 0;

comArr[3] = 0;

comArr[4] = 0.21358;

comArr[5] = 0;

comArr[6] = 0;

comArr[7] = 0;

comArr[8] = 0.34772;

OvProp.OverrideMomentsOfInertia = true;

OvProp.SetOverrideMomentsOfInertiaValue(0, comArr, "");

// Use document property units (MKS)

MyMassProp.UseSystemUnits = false;

Debug.Print("Mass properties before override");

Debug.Print("");

val = MyMassProp.Mass;

Debug.Print("Mass: " + val);

val = MyMassProp.Volume;

Debug.Print("Volume: " + val);

val = MyMassProp.Density;

Debug.Print("Density: " + val);

val = MyMassProp.SurfaceArea;

Debug.Print("Surface area: " + val);

pmoi = (double[])MyMassProp.PrincipalMomentsOfInertia;

Debug.Print("Principal moments of inertiae: Px: " + pmoi[0] + ", Py: " + pmoi[1] + ", and Pz: " + pmoi[2]);

vValue = (double[])MyMassProp.GetMomentOfInertia(0);

Debug.Print("Moments of inertia: Lxx: " + vValue[0] + ", Lxy: " + vValue[1] + ", Lxz: " + vValue[2] + ", Lyx: " + vValue[3] + ", Lyy: " + vValue[4] + ", Lyz: " + vValue[5] + ", Lzx: " + vValue[6] + ", Lzy: " + vValue[7] + ", Lzz: " + vValue[8]);