vtk基础编程(1)计算点到直线的距离

原文地址: http://blog.csdn.net/chinamming/article/details/16841503

1. 首先涉及到的类为vtkline, 其类继承关系为

2. 点到直线距离常用成员函数为

    1) 计算点到直线的距离,并求出最近点
   static double vtkLine::DistanceToLine  (    double  x[3],  
                                               double  p1[3],  
                                               double  p2[3],  
                                               double &  t,  
                                               double  closestPoint[3]  
                                           )  

 

   2) 计算点到直线的距离
   static double vtkLine::DistanceToLine  (    double  x[3],  
                                               double  p1[3],  
                                               double  p2[3]  
                                            )  

[示范程序]

int main(int, char *[])
{
    double lineP0[3] = {0.0, 0.0, 0.0};
    double lineP1[3] = {2.0, 0.0, 0.0};
    
    double p0[3] = {1.0, 0, 0};
    double p1[3] = {1.0, 2.0, 0};
    
    /*
    vtkSmartPointer<vtkLine> line =  vtkSmartPointer<vtkLine>::New();
    line->GetPoints()->SetPoint(0, lineP0);
    line->GetPoints()->SetPoint(0, lineP1);
    */
    
    {
        double dist0 = vtkLine::DistanceToLine(p0, lineP0, lineP1);
        std::cout << "Dist0: " << dist0 << std::endl;
        
        double dist1 = vtkLine::DistanceToLine(p1, lineP0, lineP1);
        std::cout << "Dist1: " << dist1 << std::endl;
    }
    
    {
        double t;
        double closest[3];
        double dist0 = vtkLine::DistanceToLine(p0, lineP0, lineP1, t, closest);
        std::cout << "Dist0: " << dist0 << " closest point: " << closest[0] << " " << closest[1] << " " << closest[2] << std::endl;
        
        double dist1 = vtkLine::DistanceToLine(p1, lineP0, lineP1, t, closest);
        std::cout << "Dist1: " << dist1 << " closest point: " << closest[0] << " " << closest[1] << " " << closest[2] << std::endl;
    } 
    return EXIT_SUCCESS;
}

 

原文地址: http://blog.csdn.net/chinamming/article/details/16841503

程序源码下载地址

 http://download.csdn.net/detail/chinamming/6580341