I am working on a 3D Morphing algorithm.
I have a point X on lying on a unit sphere in the spherical coordinate system. I have three other points A,B, and C which are also on the unit sphere. The sphere is centered at the origin.
I need to find out whether X lies on the spherical 'triangular' area enclosed by A,B, and C or not.
Can any one tell me how to do this?
Thanks a lot in advance.