How is the modelview matrix applied to vertex coordinates? - the maths ordering in the superbible looks wrong to me... i think it ought to be: (m00_m01_m02_m03) (x) (x'') (m10_m11_m12_m13)*(y) = (y'') (m20_m21_m22_m23) (z) (z'') (m30_m31_m32_m33) (w) (w'') ie. M.v = v'' but the book has v.M = v'' and i don''t think these are the same... (of course i could just be being stupid!) if anyone understands what i''m talking about, and knows what the answer is i''d appreciate the reply. alistair

You''re right, it should be M.v.

Then
x'' = m00*x + m01*y + m02*z + m03*w
y'' = m10*x + m11*y + m12*z + m13*w
z'' = m20*x + m21*y + m22*z + m23*w
w'' = m30*x + m31*y + m32*z + m33*w

GA