Open Inventor练习-SoElapsedTime引擎作用

来源：互联网发布：高中数学软件编辑：程序博客网时间：2024/05/29 10:15

// 预定义COIN宏#define COIN_DLL#define SOWIN_DLL// 加载COIN库文件#ifdef _DEBUG#pragma comment(lib, "SoWin1d.lib")#pragma comment(lib, "Coin3d.lib")#else#pragma comment(lib, "SoWin1.lib")#pragma comment(lib, "Coin3.lib")#endif// 添加COIN头文件-Window操作显示库和节点库#include <Inventor/Win/SoWin.h>#include <Inventor/Win/viewers/SoWinExaminerViewer.h>#include <Inventor/nodes/SoSeparator.h>int main(int argc, char **argv){SoDB::init();// 初始化SoDB读取iv文件HWND hWnd = SoWin::init(argv[0]);// 产生窗口句柄SoSeparator *pRootSeparator = new SoSeparator;pRootSeparator->ref();// 创建根节点并ref计数SoInput input;if (input.openFile("engine.iv"))// 加载iv文件并读取全部内容{pRootSeparator->addChild(SoDB::readAll(&input));}SoWinExaminerViewer viewer(hWnd);// 创建view窗体显示COIN三维内容viewer.setSceneGraph(pRootSeparator);// 设置显示的根节点viewer.show();// view窗体显示三维内容SoWin::show(hWnd);// windows下显示三维内容viewer.viewAll();// 显示物体全部查看模式SoWin::mainLoop();// 进入显示主循环pRootSeparator->unref();// unref删除节点计数让COIN释放资源return 0;}

一下是01.iv的内容

#Inventor V2.1 asciiSeparator {  Transform {    rotation 0 0 1 0 =     ComposeRotation {      axis 0 1 0      angle 0 = ElapsedTime {speed 0.5 } . timeOut     } . rotation  }  DrawStyle { style LINES }   Sphere {  }  }

Transform和ConposeRotation一起结合SoElapsedTime实现自动旋转的功能，等价于SoRotationXYZ的沿轴旋转功能能。

此部分的Open Inventor等价代码如下

// 预定义COIN宏#define COIN_DLL#define SOWIN_DLL// 加载COIN库文件#ifdef _DEBUG#pragma comment(lib, "SoWin1d.lib")#pragma comment(lib, "Coin3d.lib")#else#pragma comment(lib, "SoWin1.lib")#pragma comment(lib, "Coin3.lib")#endif// 添加COIN头文件-Window操作显示库和节点库#include <Inventor/Win/SoWin.h>#include <Inventor/Win/viewers/SoWinExaminerViewer.h>#include <Inventor/nodes/SoSeparator.h>// IV等效代码#include <Inventor/nodes/SoMaterial.h>#include <Inventor/nodes/SoTransform.h>#include <Inventor/nodes/SoCube.h>#include <Inventor/nodes/SoCoordinate3.h>#include <Inventor/nodes/SoIndexedLineSet.h>#include <Inventor/nodes/SoRotation.h>#include <Inventor/engines/SoElapsedTime.h>#include <Inventor/nodes/SoDrawStyle.h>#include <Inventor/nodes/SoSphere.h>#include <Inventor/nodes/SoRotationXYZ.h>int main(int argc, char **argv){SoDB::init();// 初始化SoDB读取iv文件HWND hWnd = SoWin::init(argv[0]);// 产生窗口句柄SoSeparator *pRootSeparator = new SoSeparator;pRootSeparator->ref();// 创建根节点并ref计数SoInput input;if (input.openFile("engine.iv"))// 加载iv文件并读取全部内容{//  pRootSeparator->addChild(SoDB::readAll(&input));// IV等效代码SoElapsedTime *pElapsedTime = new SoElapsedTime;pElapsedTime->speed = 0.5f;SoRotationXYZ *pRotationXYZ = new SoRotationXYZ;pRotationXYZ->axis = SoRotationXYZ::Y;pRotationXYZ->angle.connectFrom(&pElapsedTime->timeOut);pRootSeparator->addChild(pRotationXYZ);SoDrawStyle *pDrawStyle = new SoDrawStyle;pDrawStyle->style = SoDrawStyle::LINES;pRootSeparator->addChild(pDrawStyle);pRootSeparator->addChild(new SoSphere);}SoWinExaminerViewer viewer(hWnd);// 创建view窗体显示COIN三维内容viewer.setSceneGraph(pRootSeparator);// 设置显示的根节点viewer.show();// view窗体显示三维内容SoWin::show(hWnd);// windows下显示三维内容viewer.viewAll();// 显示物体全部查看模式SoWin::mainLoop();// 进入显示主循环pRootSeparator->unref();// unref删除节点计数让COIN释放资源return 0;}

显示的效果如下