Some more questions:
In the following, it seems that a vector also has 'U' and 'V' parts? I don't think that these are talking about texture co-ordinates either.
The tangent space is made of three vectors: the tangent, the binormal and the normal. The tangent is the vector along which the U coordinates of the vertices are increased. The binormal is the vector along which the V coordinates of the vertices are increased. The normal is... the normal!
Most of the time the three vectors are orthogonal. In some cases they are not, but lighting will still work.
And here we see another mention of a vector having 'u' and 'v' components...
(p2->x-p1->x,p2->u-p1->u,p2->v-p1->v)
Any ideas?
In the following, it seems that a vector also has 'U' and 'V' parts? I don't think that these are talking about texture co-ordinates either.
The tangent space is made of three vectors: the tangent, the binormal and the normal. The tangent is the vector along which the U coordinates of the vertices are increased. The binormal is the vector along which the V coordinates of the vertices are increased. The normal is... the normal!
Most of the time the three vectors are orthogonal. In some cases they are not, but lighting will still work.
And here we see another mention of a vector having 'u' and 'v' components...
(p2->x-p1->x,p2->u-p1->u,p2->v-p1->v)
Any ideas?