1.I'm working on the project "PDB File Parser". 

I'm trying to get familiar with the format of PDB file.

ref: http://www.wwpdb.org/documentation/format23/sect5.html#HELIX

2.I'm working on the construction of the graphics of the atoms/lines using OpenGL.

ref: some online tutorials

3.I'm working on the the recognition of helix/sheet among atoms.

Yuling Li