为什么显示的颜色不是VTK中的预期颜色？

Question

问题是我传递给vtkProperty的RGB值不会生成预期的颜色。例如RGB（146,110,218）标识的slateblue显示为白色。

下面是相关代码：

vtk.vtkLineSource line = new vtkLineSource(); 
line.SetPoint1(0.0, 0.0, 0.0); 
line.SetPoint2(50, 50, 0.0); 

vtkPolyDataMapper mapper = new vtkPolyDataMapper(); 

mapper.SetInput(line.GetOutput()); 

vtkActor lineActor = new vtkActor(); 
lineActor.SetMapper(mapper); 

double r = 146.0; 
double g = 110.0; 
double b = 218.0; 

vtkProperty property = new vtkProperty(); 
property.SetColor(r, g, b); 
lineActor.SetProperty(property); 

Answer 1

这种现象的原因是，VTK使用标准化的颜色值。

因此该解决方案是很简单的：我们具有由255

[...] 

double r = 146.0/255.0; 
double g = 110.0/255.0; 
double b = 218.0/255.0; 

vtkProperty property = new vtkProperty(); 
property.SetColor(r, g, b); 
lineActor.SetProperty(property);