[vtkusers] who can help me to explain the meaning of "scalar values", thanks

[Ye Jun]

hi, i am a newcomer to the vtk, but i found that there lots of scalar values
mentioned in the docs of vtk,eg."vtkContourFilter - generate
isosurfaces/isolines from scalar values"
 , it really puzzled me, is there anybody can teach me what is this scalar
meaning and what is it used for ?

thanks

alexsando
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