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
1 #ifndef INITIAL_OPENGL 2 #define INITIAL_OPENGL 3 #include <vtkAutoInit.h> 4 VTK_MODULE_INIT(vtkRenderingOpenGL) 5 VTK_MODULE_INIT(vtkInteractionStyle) 6 VTK_MODULE_INIT(vtkRenderingFreeType) 7 #endif 8 #include <iostream> 9 using namespace std; 10 #include<vtkSmartPointer.h> 11 #include<vtkPerspectiveTransform.h> 12 #include <vtkMatrix4x4.h> 13 #include <vtkTransform.h> 14 15 int main() 16 { 17 vtkSmartPointer<vtkMatrix4x4> m=vtkSmartPointer<vtkMatrix4x4>::New(); 18 double ma[4][4]={{1,2,3,4}, 19 {2,2,3,4}, 20 {3,2,3,4}, 21 {4,2,3,4}}; 22 for(int i=0;i<4;i++) 23 { 24 for(int j=0;j<4;j++) 25 { 26 //void SetElement(int i, int j, double value),i行、j列的值为value 27 m->SetElement(i,j,ma[i][j]); 28 } 29 } 30 //普通变换 31 vtkSmartPointer<vtkTransform> transform=vtkSmartPointer<vtkTransform>::New(); 32 transform->SetMatrix(m); 33 double p[3]={1,2,3};//原始点 34 double normalProjection[3];//投影变换后的点坐标 35 transform->TransformPoint(p,normalProjection); 36 cout<<"Original point :"<<p[0]<<","<<p[1]<<","<<p[2]<<endl; 37 cout<<"Standard projection:"<<normalProjection[0]<<","<<normalProjection[1]<<","<<normalProjection[2]<<endl; 38 //透视投影变换 39 double perspectiveProjection[3]; 40 vtkSmartPointer<vtkPerspectiveTransform>perspectiveTransform=vtkSmartPointer<vtkPerspectiveTransform>::New(); 41 perspectiveTransform->SetMatrix(m); 42 perspectiveTransform->TransformPoint(p,perspectiveProjection); 43 cout<<"Perspective projection:"<<perspectiveProjection[0]<<","<<perspectiveProjection[1]<<","<<perspectiveProjection[2]<<endl; 44 return 0; 45 }
#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[4][4]={{1,2,3,4},
{2,2,3,4},
{3,2,3,4},
{4,2,3,4}};
for(inti=0;i<4;i++)
{
for(intj=0;j<4;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[3]={1,2,3};//原始点
doublenormalProjection[3];//投影变换后的点坐标
transform->TransformPoint(p,normalProjection);
cout<<"Originalpoint:"<<p[0]<<","<<p[1]<<","<<p[2]<<endl;
cout<<"Standardprojection:"<<normalProjection[0]<<","<<normalProjection[1]<<","<<normalProjection[2]<<endl;
//透视投影变换
doubleperspectiveProjection[3];
vtkSmartPointer<vtkPerspectiveTransform>perspectiveTransform=vtkSmartPointer<vtkPerspectiveTransform>::New();
perspectiveTransform->SetMatrix(m);
perspectiveTransform->TransformPoint(p,perspectiveProjection);
cout<<"Perspectiveprojection:"<<perspectiveProjection[0]<<","<<perspectiveProjection[1]<<","<<perspectiveProjection[2]<<endl;
return0;
}
