[vtkusers] Mouse Drag and Click & Boolean Operations on Implicit Functions

[Rahul Goela]

Hi,

I am fairly new to VTK (VTK 4.2). Currently I have a
system which can visualize points in 3D space. I have
also created an Axis to show the relative position. I
now need to create any shape in this space, say a
Sphere (initially at origin). There are two main
aspects regarding which I need help 

1. The user should be able to drag this sphere using
mouse to any place in the 3D space.

2. Once the user has placed the sphere in 3D space, I
need to get those points which lie inside that sphere.


I have not been able to find relevant examples which
can help me with Mouse Click and Dragging as well as
obtaining points using Boolean Operations with
Implicit Functions.

Any help regarding the above mentioned two problems
would be highly appreciated.

Thanks in advance

Rahul


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