C# Solidworks二次开发：向量相关的数学函数API使用（第二讲）

大家好，今天要讲的是关于向量相关的API，之前讲的不再进行介绍，想了解的可以看我之前的文章：

C# Solidworks二次开发：向量相关的数学函数API的使用介绍_solidworks二次开发中矩阵变换函数-CSDN博客下面介绍向量其它的相关API：

（1）第一个为Add ,这个API的含义为把一个向量添加到另一个向量中，下面是API的解释：

其输入的参数值只有一个，就是Math vector。

其返回值在成功的时候返回的是Math vector，在失败的时候返回的是null。

下面几个API也会涉及vector，这里我运用官方的例子对其进行使用展示：

This example shows how to get the outline of a solid body. This example also creates and inserts a sketch of that outline.

//-----------------------------------------------------
// Preconditions: Open a part document that contains
// at least one solid body.
//
// Postconditions: Processes the body outline curves
// to remove gaps before sketching the outline.
//-----------------------------------------------------
using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Runtime.InteropServices;
namespace GetBodyOutline2_CSharp.csproj
{
    partial class SolidWorksMacro
    {

        PartDoc swPart;
        ModelDoc2 swModel;
        MathVector swMathVector;
        MathUtility swMathUtility;
        Modeler swModeler;
        object dirVar;
        object[] bVar;
        DispatchWrapper[] arrBodiesIn = new DispatchWrapper[1];
        object[] Bodies = new object[1];
        object curveOut;
        object topol;
        object outline;
        double[] sEva;
        double[] eEva;
        double[] sEvaPrev;
        double[] eEvaPrev;
        double[] sEvaNext;
        double[] eEvaNext;
        double[] dirArr = new double[3];
        double s;
        double e;
        int nCt;
        int i;
        int v;
        bool isClosed;
        bool isPer;

        public enum direction
        {
            X = 1,
            Y = 2,
            Z = 3,
            Xminus = 4,
            Yminus = 5,
            Zminus = 6
        }

        public void Main()
        {
            swPart = (PartDoc)swApp.ActiveDoc;
            swModel = (ModelDoc2)swPart;

            //Get the bodies in this part
            bVar = (object[])swPart.GetBodies2((int)swBodyType_e.swSolidBody, false);
            int bdycnt = bVar.GetLength(0);

            for (i = 0; i < bdycnt; i++)
            {
                Bodies[i] = bVar[i];
                arrBodiesIn[i] = new DispatchWrapper(Bodies[i]);
            }

            swModeler = (Modeler)swApp.GetModeler();
            swMathUtility = (MathUtility)swApp.GetMathUtility();

            //Create the direction vector
            dirArr[0] = 0;
            dirArr[1] = 0;
            dirArr[2] = 0;

            direction userDirection = default(direction);
            userDirection = direction.Y;

            if (userDirection == direction.X)
            {
                dirArr[0] = 1;
            }
            else if (userDirection == direction.Xminus)
            {
                dirArr[0] = -1;
            }
            else if (userDirection == direction.Y)
            {
                dirArr[1] = 1;
            }
            else if (userDirection == direction.Yminus)
            {
                dirArr[1] = -1;
            }
            else if (userDirection == direction.Z)
            {
                dirArr[2] = 1;
            }
            else if (userDirection == direction.Zminus)
            {
                dirArr[2] = -1;
            }

            dirVar = dirArr;

            //Create a MathVector
            swMathVector = (MathVector)swMathUtility.CreateVector((dirArr));

            //Get the number of curves in the body outline
            nCt = swModeler.GetBodyOutline2((arrBodiesIn), swMathVector, 0.00001, true, out curveOut, out topol, out outline);
            Object[] crvOut = (Object[])curveOut;

            //Open a 3D sketch in the part document
            swModel.Insert3DSketch();

            //Using the end conditions of the curves, create a 2D sketch of each curve
            Curve[] vCurve = null;
            int newCt = 0;

            for (i = 0; i <= nCt - 1; i++)
            {
                ((Curve)crvOut[i]).GetEndParams(out s, out e, out isClosed, out isPer);
                if (((Curve)crvOut[i]).GetLength3(s, e) > 1E-05)
                {
                    Array.Resize(ref vCurve, newCt + 1);
                    vCurve[newCt] = (Curve)crvOut[i];

                    newCt = newCt + 1;
                }
            }

            double[] sPoints = null;
            double[] ePoints = null;

            sPoints = new double[(newCt * 3)];
            ePoints = new double[(newCt * 3)];

            for (i = 0; i <= newCt - 1; i++)
            {
                vCurve[i].GetEndParams(out s, out e, out isClosed, out isPer);
                sEva = (double[])vCurve[i].Evaluate(s);
                eEva = (double[])vCurve[i].Evaluate(e);

                if (i > 0)
                {
                    v = i - 1;
                }
                else
                {
                    v = newCt - 1;
                }

                vCurve[v].GetEndParams(out s, out e, out isClosed, out isPer);
                sEvaPrev = (double[])vCurve[v].Evaluate(s);
                eEvaPrev = (double[])vCurve[v].Evaluate(e);

                if (i < newCt - 1)
                {
                    v = i + 1;
                }
                else
                {
                    v = 0;
                }

                vCurve[v].GetEndParams(out s, out e, out isClosed, out isPer);
                sEvaNext = (double[])vCurve[v].Evaluate(s);
                eEvaNext = (double[])vCurve[v].Evaluate(e);

                sPoints[i * 3] = sEva[0] + 0.5 * (eEvaPrev[0] - sEva[0]);
                sPoints[i * 3 + 1] = sEva[1] + 0.5 * (eEvaPrev[1] - sEva[1]);
                sPoints[i * 3 + 2] = sEva[2] + 0.5 * (eEvaPrev[2] - sEva[2]);

                ePoints[i * 3] = eEva[0] + 0.5 * (sEvaNext[0] - eEva[0]);
                ePoints[i * 3 + 1] = eEva[1] + 0.5 * (sEvaNext[1] - eEva[1]);
                ePoints[i * 3 + 2] = eEva[2] + 0.5 * (sEvaNext[2] - eEva[2]);

                if (userDirection == direction.X | userDirection == direction.Xminus)
                {
                    sPoints[i * 3] = 0;
                    ePoints[i * 3] = 0;
                }
                else if (userDirection == direction.Y | userDirection == direction.Yminus)
                {
                    sPoints[i * 3 + 1] = 0;
                    ePoints[i * 3 + 1] = 0;
                }
                else if (userDirection == direction.Z | userDirection == direction.Zminus)
                {
                    sPoints[i * 3 + 2] = 0;
                    ePoints[i * 3 + 2] = 0;
                }
            }

            for (i = 0; i <= (newCt * 3) - 1; i += 3)
            {
                swModel.CreateLine2(sPoints[i], sPoints[i + 1], sPoints[i + 2], ePoints[i], ePoints[i + 1], ePoints[i + 2]);
            }

            //Insert the sketches
            swModel.InsertSketch2(true);
            swModel.ClearSelection2(true);

        }

        public SldWorks swApp;

    }
}