vtk clamping 显示区域范围

virtual void vtkPiecewiseFunction::ClampingOn (   )  
virtual

When zero range clamping is Off, GetValue() returns 0.0 when a value is requested outside of the points specified. When zero range clamping is On, GetValue() returns the value at the value at the lowest point for a request below all points specified and returns the value at the highest point for a request above all points specified.On is the default.

virtual void vtkPiecewiseFunction::ClampingOff (   )  
virtual

When zero range clamping is Off, GetValue() returns 0.0 when a value is requested outside of the points specified. When zero range clamping is On, GetValue() returns the value at the value at the lowest point for a request below all points specified and returns the value at the highest point for a request above all points specified. On is the default.

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