Open Inventor练习-文件读取

来源：互联网发布：excel同名数据合并求和编辑：程序博客网时间：2024/05/29 09:51

Open Inventor采用SoInput和SoDB读取许多三维格式存储文件，如iv等文件，这个就是文件读取的演示例子。

#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/SoCube.h>#include <Inventor/nodes/SoDirectionalLight.h>#include <Inventor/nodes/SoMaterial.h>#include <Inventor/nodes/SoPerspectiveCamera.h>#include <Inventor/nodes/SoTransform.h>#include <Inventor/nodes/SoSeparator.h>#include <Inventor/actions/SoWriteAction.h>SoSeparator *readSGFromFile (const char* filename){SoInput in;if (!in.openFile(filename)){fprintf(stderr, "Could not open file %s\n", filename);return NULL;}SoSeparator *sg = SoDB::readAll(&in);if (!sg) {fprintf(stderr, "Error reading file. \n");return NULL;}in.closeFile();return sg;}int main (int argc, char** argv){if (argc < 2){fprintf(stderr, "Usage: %s filename\n", argv[0]);exit(-1);}HWND win = SoWin::init(argv[0]);if (win == NULL) exit(1);SoSeparator* root = new SoSeparator;root->ref();root->addChild(readSGFromFile(argv[1]));SoWinExaminerViewer* x = new SoWinExaminerViewer(win);x->setSceneGraph(root);x->setTitle("foo");x->show(); SoWin::show(win);SoWin::mainLoop();return 0;}

在工程中设定要读入的文件名字到命令行参数，运行程序就可以在三维空间内显示出来其中的内容了。