[vtkusers] about plane and the coordinate

[David Doria]

On Tue, Sep 28, 2010 at 2:00 PM, myaqua1982 <myaqua1982 at 163.com> wrote:
> Hi all,
>
> The first question is : what are the differences between vtkPlane and
> vtkPlanesource?
> The second is : I want to define a plane in the sagittal section and a
> plane in the axial section and another plane in the coronal section.
> And these planes seperate the object into two equal parts in the three
> different sections respectively. Which class should I choose to define the
> planes? As we know, these three planes will cross only one point together.
> Then I want to define this point to be the original point of a new
> coordinate which composed of by the three planes and the point. I have no
> ideal how to achieve the goal.Did I explain the probems clearly?
>  Please give me some advice to solve these problems. I appreciate your
> patience read my words above.
> Thank you very much ! Please write me soon.
>
>
> yours JHT

Question 1:
vtkPlane is an abstract concept of a plane (stores a normal and
origin) that lets you do computations involving a plane:
http://www.vtk.org/doc/nightly/html/classvtkPlane.html
http://www.vtk.org/Wiki/VTK/Examples/Cxx/SimpleOperations/ProjectPointPlane

vtkPlaneSource generates a polygonal representation of a plane:
http://www.vtk.org/doc/nightly/html/classvtkPlaneSource.html
http://www.vtk.org/Wiki/VTK/Examples/Cxx/GeometricObjects/Plane

David