   Dot product of 3D vector and 4D Vector
  Does it make any sense ?I am trying to Calculate texture coordinates for vertices after parsing a .map fileand the article : http://folk.uio.no/stefanha/MAPFiles.pdf suggests thatin the formula you use to calculate the U and V texture coordinates, one operation is to take the dot product of the vertex with the texture axis.However , the vertex is a 3D vector while the texture axis is described as a 4D vector:O   
Cross posted. closed.   