vtkTransform實例 1

本文轉載自查看原文 2016-12-13 10:43 1867 vtkPerspectiveTransform/ vtkTransform/ 空間變換transform

1. 4*4矩陣類vtkMatrix4x4

　　接口函數：void SetElement(int i, int j, double value),i行、j列的值為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列的值為value
27             m->SetElement(i,j,ma[i][j]);
28         }
29     }
30     //普通變換
31     vtkSmartPointer<vtkTransform> transform=vtkSmartPointer<vtkTransform>::New();
32     transform->SetMatrix(m);
33     double p[3]={1,2,3};//原始點
34     double normalProjection[3];//投影變換后的點坐標
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     //透視投影變換
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列的值為value

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

//普通變換

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

transform->SetMatrix(m);

doublep[3]={1,2,3};//原始點

doublenormalProjection[3];//投影變換后的點坐標

transform->TransformPoint(p,normalProjection);

cout<<"Originalpoint:"<<p[0]<<","<<p[1]<<","<<p[2]<<endl;

cout<<"Standardprojection:"<<normalProjection[0]<<","<<normalProjection[1]<<","<<normalProjection[2]<<endl;

//透視投影變換

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;

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