Open Inventor练习-iv文件读写显示4
// 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("03_transorder.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 ascii
Separator {
Coordinate3 {
point [
0 0 0,
10 0 0,
0 10 0,
0 0 10,
]
}
IndexedLineSet {
coordIndex [
0,1,-1,
0,2,-1,
0,3,-1
]
}
Separator {
Rotation {
rotation 0 0 1 0.785
}
Translation {
translation 8 0 0
}
Material {
diffuseColor 1 0 0
}
Cube {
}
}
Separator {
Translation {
translation 8 0 0
}
Rotation {
rotation 0 0 1 0.785
}
Material {
diffuseColor 0 1 0
}
Cube {
}
}
}
OpenGL齐次坐标系对平移和旋转的顺序有一定的要求，Open Inventor的这个演示可以很好的说明这一点。
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>
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("03_transorder.iv")) // 加载iv文件并读取全部内容
{
// pRootSeparator->addChild(SoDB::readAll(&input));
// IV等效代码
float fPoints[4][3] = {{0, 0, 0}, {10, 0, 0}, {0, 10, 0}, {0, 0, 10}};
int32_t nLineSets[] = {0, 1, SO_END_LINE_INDEX, 0, 2, SO_END_LINE_INDEX, 0, 3, SO_END_LINE_INDEX};
SoCoordinate3 *pCoordinate3 = new SoCoordinate3;
pCoordinate3->point.setValues(0, 4, fPoints);
pRootSeparator->addChild(pCoordinate3);
SoIndexedLineSet *pIndexedLineSet = new SoIndexedLineSet;
pIndexedLineSet->coordIndex.setValues(0, 9, nLineSets);
pRootSeparator->addChild(pIndexedLineSet);
{
SoSeparator *pSeparator = new SoSeparator;
SoRotation *pRotation = new SoRotation;
pRotation->rotation.setValue(0, 0, 1, 0.785f);
pSeparator->addChild(pRotation);
SoTransform *pTransform = new SoTransform;
pTransform->translation.setValue(8, 0, 0);
pSeparator->addChild(pTransform);
SoMaterial *pMaterial = new SoMaterial;
pMaterial->diffuseColor.setValue(1.0f, 0.0f, 0.0f);
pSeparator->addChild(pMaterial);
pSeparator->addChild(new SoCube);
pRootSeparator->addChild(pSeparator);
}
{
SoSeparator *pSeparator = new SoSeparator;
SoTransform *pTransform = new SoTransform;
pTransform->translation.setValue(8, 0, 0);
pSeparator->addChild(pTransform);
SoRotation *pRotation = new SoRotation;
pRotation->rotation.setValue(0, 0, 1, 0.785f);
pSeparator->addChild(pRotation);
SoMaterial *pMaterial = new SoMaterial;
pMaterial->diffuseColor.setValue(0.0f, 1.0f, 0.0f);
pSeparator->addChild(pMaterial);
pSeparator->addChild(new SoCube);
pRootSeparator->addChild(pSeparator);
}
}
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;
}
