vtkTransform实例 1

1. 4*4矩阵类vtkMatrix4x4

　　接口函数：void SetElement(int i, int j, double value),i行、j列的值为value

 #ifndef INITIAL_OPENGL
 #define INITIAL_OPENGL
 #include <vtkAutoInit.h>
 VTK_MODULE_INIT(vtkRenderingOpenGL)
 VTK_MODULE_INIT(vtkInteractionStyle)
 VTK_MODULE_INIT(vtkRenderingFreeType)
 #endif
 #include <iostream>
 using namespace std;
 #include<vtkSmartPointer.h>
 #include<vtkPerspectiveTransform.h>
 #include <vtkMatrix4x4.h>
 #include <vtkTransform.h>

 int main()
 {
     vtkSmartPointer<vtkMatrix4x4> m=vtkSmartPointer<vtkMatrix4x4>::New();
     double ma[][]={{,,,},
                      {,,,},
                      {,,,},
                      {,,,}};
     for(int i=;i<;i++)
     {
         for(int j=;j<;j++)
         {
             //void SetElement(int i, int j, double value),i行、j列的值为value
             m->SetElement(i,j,ma[i][j]);
         }
     }
     //普通变换
     vtkSmartPointer<vtkTransform> transform=vtkSmartPointer<vtkTransform>::New();
     transform->SetMatrix(m);
     double p[]={,,};//原始点
     double normalProjection[];//投影变换后的点坐标
     transform->TransformPoint(p,normalProjection);
     cout<<"Original point     :"<<p[]<<","<<p[]<<","<<p[]<<endl;
     cout<<"Standard projection:"<<normalProjection[]<<","<<normalProjection[]<<","<<normalProjection[]<<endl;
     //透视投影变换
     double perspectiveProjection[];
     vtkSmartPointer<vtkPerspectiveTransform>perspectiveTransform=vtkSmartPointer<vtkPerspectiveTransform>::New();
     perspectiveTransform->SetMatrix(m);
     perspectiveTransform->TransformPoint(p,perspectiveProjection);
     cout<<"Perspective projection:"<<perspectiveProjection[]<<","<<perspectiveProjection[]<<","<<perspectiveProjection[]<<endl;
     return ;
 }

#ifndefINITIAL_OPENGL

#defineINITIAL_OPENGL

#include<vtkAutoInit.h>

VTK_MODULE_INIT(vtkRenderingOpenGL)

VTK_MODULE_INIT(vtkInteractionStyle)

VTK_MODULE_INIT(vtkRenderingFreeType)

#endif

#include<iostream>

usingnamespacestd;

#include<vtkSmartPointer.h>

#include<vtkPerspectiveTransform.h>

#include<vtkMatrix4x4.h>

#include<vtkTransform.h>

intmain()

{

vtkSmartPointer<vtkMatrix4x4>m=vtkSmartPointer<vtkMatrix4x4>::New();

doublema[][]={{,,,},

{,,,},

{,,,},

{,,,}};

for(inti=;i<;i++)

{

for(intj=;j<;j++)

{

//voidSetElement(inti,intj,doublevalue),i行、j列的值为value

m->SetElement(i,j,ma[i][j]);

}

}

//普通变换

vtkSmartPointer<vtkTransform>transform=vtkSmartPointer<vtkTransform>::New();

transform->SetMatrix(m);

doublep[]={,,};//原始点

doublenormalProjection[];//投影变换后的点坐标

transform->TransformPoint(p,normalProjection);

cout<<"Originalpoint:"<<p[]<<","<<p[]<<","<<p[]<<endl;

cout<<"Standardprojection:"<<normalProjection[]<<","<<normalProjection[]<<","<<normalProjection[]<<endl;

//透视投影变换

doubleperspectiveProjection[];

vtkSmartPointer<vtkPerspectiveTransform>perspectiveTransform=vtkSmartPointer<vtkPerspectiveTransform>::New();

perspectiveTransform->SetMatrix(m);

perspectiveTransform->TransformPoint(p,perspectiveProjection);

cout<<"Perspectiveprojection:"<<perspectiveProjection[]<<","<<perspectiveProjection[]<<","<<perspectiveProjection[]<<endl;

return;

}