[VTK]vtkAngleWidget角度测量设置线颜色color

http://www.cnblogs.com/dawnWind/archive/2013/05/03/3D_10.html

通过继承类对vtkAngleWidget的点进行初始化，这次想修改测量时候显示的直线颜色。

Update PS:What a shame, this codes is easy....

刚刚发现，这个情况与初始化三个点是不同的。三个点是需要通过representation设置，当时对于这里的

边以及弧来说，程序里面本身就已经有，而且也提供了直接返回的函数，因此可以直接设置--！

比如：this->GetRay1()->GetProperty()->SetColor(widgetColor);

         this->GetRay1()->GetProperty()->SetColor(widgetColor);
         this->GetRay1()->GetProperty()->SetLineWidth(2);
         // has the same result
         this->Ray2->GetProperty()->SetColor(widgetColor);
         this->Ray2->GetProperty()->SetLineWidth(2);

效果：

因此下面的文字可以不用你看了...

----------------Not Recommend------------

通过对vtkAngleRepresentation3D的分析发现没有内置的函数可以进行颜色设置。

还是通过源码的分析，对于一个angleWidget用于测量的是3个点两条线。

而在代码里面是这样呈现的：使用lineSource+mapper+actor对线进行显示。

vtkLineSource *Line1Source;
vtkLineSource *Line2Source;
vtkPolyDataMapper *Line1Mapper;
vtkPolyDataMapper *Line2Mapper;
vtkActor *Ray1;
vtkActor *Ray2;

而在实现里面是设置为红色的(1.0, 0.0, 0.0)

  // Represent the line1
  this->Line1Source = vtkLineSource::New();
  this->Line1Source->SetResolution(5);
  this->Line1Mapper = vtkPolyDataMapper::New();
  this->Line1Mapper->SetInput(this->Line1Source->GetOutput());
  this->Ray1 = vtkActor::New();
  this->Ray1->SetMapper(this->Line1Mapper);
  this->Ray1->GetProperty()->SetColor( 1.0, 0.0, 0.0 );

由于可以通过actor设置其颜色，那么这里也可以这样用。

class vtkAngleRepresentation3DWithPointRepresentation: public vtkAngleRepresentation3D
{
    public:
     static vtkAngleRepresentation3DWithPointRepresentation *New()
     {
          return new vtkAngleRepresentation3DWithPointRepresentation;
     }
     void initialPointRepresentation()
     {
         this->Point1Representation = vtkPointHandleRepresentation3D::New();
         this->Point2Representation = vtkPointHandleRepresentation3D::New();
         this->CenterRepresentation = vtkPointHandleRepresentation3D::New();
     }
     void SetTheColorOfRays(double point[3])
     {
         this->Ray1->GetProperty()->SetColor(point);
         this->Ray2->GetProperty()->SetColor(point);
     }
     void SetThePoint1WordPosition(double point[3])
     {
         this->GetPoint1Representation()->SetWorldPosition(point);
     }
     void SetThePoint2WordPosition(double point[3])
     {
         this->GetPoint2Representation()->SetWorldPosition(point);
     }
     void SetTheCenterWordPosition(double point[3])
     {
         this->GetCenterRepresentation()->SetWorldPosition(point);
     }
};

因此如下的SetTheColorOfRays函数，然后在程序里面调用就可，比如设置(1.0, 1.0, 1.0)

同理可以对其中涉及的弧、文字进行颜色的设置:)