3D point inside a 3D cone or 3D triangle

[kk.creare]

I am newbie to bullet ;-p excited but started with collision detection problem and struck ;-p

Basically i want to create a 3d cone and then find whether a given 3D point lies within the cone or not.
Either i can creat cone manually or use an already existing mesh for a cone. So could some one please help me to achieve this

[Basroil]

Try looking at the demos. There's at least two I can think of (convex collision included) that teach you how to do just that.