vtkMapper相关类的分析及重写vtkMapper实现自定义的一些效果 (1)vtkAbstractMapper3D

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#include "vtkAbstractMapper3D.h"
#include "vtkDataSet.h"
#include "vtkMath.h"

vtkCxxRevisionMacro(vtkAbstractMapper3D, "$Revision: 1.19 $");

// Construct with initial range (0,1).
vtkAbstractMapper3D::vtkAbstractMapper3D()
{
  vtkMath::UninitializeBounds(this->Bounds);//把包围盒初始化
  this->Center[0] = this->Center[1] = this->Center[2] = 0.0;
}

// Get the bounds for this Prop as (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
void vtkAbstractMapper3D::GetBounds(double bounds[6])//返回此Mapper的包围盒
{
  this->GetBounds();
  for (int i=0; i<6; i++)
    {
    bounds[i] = this->Bounds[i];
    }
}

double *vtkAbstractMapper3D::GetCenter()//得到包围盒的中心
{
  this->GetBounds();
  for (int i=0; i<3; i++)
    {
    this->Center[i] = (this->Bounds[2*i+1] + this->Bounds[2*i]) / 2.0;
    }
  return this->Center;
}

double vtkAbstractMapper3D::GetLength()//得到包围盒对角线的长度,其实也是物体包围球的半径
{
  double diff, l=0.0;
  int i;

  this->GetBounds();
  for (i=0; i<3; i++)
    {
    diff = this->Bounds[2*i+1] - this->Bounds[2*i];
    l += diff * diff;
    }
 
  return sqrt(l);
}

void vtkAbstractMapper3D::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);
}