一个OpenInventor程序

/*---------------------------------------------------------------------------------------------------------- 
   
FUNCTION: 
             SoSeparator *makeProfileLineSet();定义剖面的场景示意图
            Main(int, char **argv)；主函数按照场景示意图绘制场景 
     
PURPOSE: 利用面集节点（SoLineSet）绘制两个四边形的剖面。
   
HISTORY:       Date:26/11/2007             Author:Shao Yanhong           Comment: 
                                    
---------------------------------------------------------------------------------------------------------*/
#include "assert.h"

#include <Inventor\Win\SoWin.h>
#include <Inventor\Win\viewers\SoWinExaminerViewer.h>
#include <Inventor\nodes\SoCoordinate3.h>
#include <Inventor\nodes\SoLineSet.h>
#include <Inventor\nodes\SoMaterial.h>
#include <Inventor\nodes\SoSeparator.h>
#include <Inventor\nodes\SoVertexProperty.h>

static const float lineVertices[16][3] = {     // 定义两个剖面
     { 1.0f, 2.0f, 1.0f}, { 2.0f, 2.0f, 1.0f}, //顶面四条边
    { 2.0f, 2.0f, 1.0f}, { 2.0f, 2.0f, 2.0f},
    { 2.0f, 2.0f, 2.0f}, { 1.0f, 2.0f, 2.0f},
    { 1.0f, 2.0f, 2.0f}, { 1.0f, 2.0f, 1.0f},

    { 1.0f, 1.0f, 1.0f}, { 2.0f, 1.0f, 1.0f}, //底面四条边
    { 2.0f, 1.0f, 1.0f}, { 2.0f, 1.0f, 2.0f},
    { 2.0f, 1.0f, 2.0f}, { 1.0f, 1.0f, 2.0f},
    { 1.0f, 1.0f, 2.0f}, { 1.0f, 1.0f, 1.0f},
};

// 每个边中顶点的个数
static int numvertices[8] = {2, 2, 2, 2, 2, 2, 2, 2};

SoSeparator *makeProfileLineSet()
{
    SoSeparator *profile = new SoSeparator();
        profile->ref();
    
    
    // 定义剖面线框的材质
    SoMaterial *myMaterial = new SoMaterial;
    myMaterial->diffuseColor.setValue(1.0f, 0.0f, 0.0f);
    myMaterial->ambientColor.setValue(1.0f, 0.8f, 0.8f);
    profile->addChild(myMaterial);
    
    // 定义定点的坐标
    SoCoordinate3 *myCoords = new SoCoordinate3;
    myCoords->point.setValues(0, 16, lineVertices);
    profile->addChild(myCoords);
    
    // 定义SoLineSet线集
    SoLineSet *myLineSet = new SoLineSet;
    myLineSet->numVertices.setValues(0, 8, numvertices);
    profile->addChild(myLineSet);
    
    profile->unrefNoDelete();
    return profile;
}

int main(int, char **argv)
{
    HWND myWindow = SoWin::init(argv[0]);
    if (myWindow == NULL) exit(1);
    
    SoSeparator *root = new SoSeparator;
    root->ref();
    
    root->addChild(makeProfileLineSet());
    
    SoWinExaminerViewer *myViewer = new SoWinExaminerViewer(myWindow);
    myViewer->setSceneGraph(root);
    myViewer->setBackgroundColor(SbColor(0.9f, 0.9f, 0.95f));
    myViewer->setTitle("Two Profiles");
    myViewer->show();
    myViewer->viewAll();
    
    SoWin::show(myWindow);
    SoWin::mainLoop();
    
    return 0;
}