int   AddLightVertex2(vect3d v,vect3d norm,float tu,float tv,float tu2,float tv2,DWORD color)
    v: Coordinates in the world space.
    norm:  Normal of vertex. 
    tu,tv:   U,V texture coordinates. The texture area is [0..1], but you can tile it [-8192..8192].
    tu2,tv2:   U,V texture coordinates for second texture if you use multitexture, or texture effects. The texture area is [0..1], but you can tile it [-8192..8192].
    color:      Color of vertex in dxColor format.

    Result:
    If it was not successfull, it is -1.
    If it was succesfull, so it is the vertex index in current object. All vertices are local numbered in the itself object, that means the first vertex of the specified object is 0 always.