Computing Tangent Space Basis Vectors for an Arbitrary Mesh - Eric LengyelEric Lengyel • March 15, 2004 Modern bump mapping (also known as normal mapping) requires that tangent plane basis vectors be calculated for each vertex in a mesh. This article presents the theory behind the computation of per-vertex tangent spaces for an arbitrary triangle mesh and provides source code that implements the proper mathematics. [Edit: this derivation first appeared in Mathematic
