[vtkusers] vtkPlane::ProjectPoint ...(Is it orthographic based ?)

[Sebastien Auclair]

Greetings again,

Is vtkPlane::ProjectPoint() using the camera position to shoot a ray passing
by the display plane picked point or is it always parallel to the display
plane's normal ?
This would explain my problems.

Again, my goal is simply to pick an invisible vtkPlane and get the picked
coordinates.
If i use this coordinate to display a sphere, its position should always be
under the mouse cursor.

Thanks !
__________________________
Seb