xvs.1.1

// c0-3 = wvp matrix
// c4-7 = world matrix
// c8 = camera position

def c50, 0.5,0.5,0.5,0.5

// v0 = position
// v1 = normal
// v2 = tex co-ords
// v3 = tangent
// v4 = binormal

// output position
m4x4 oPos,v0,c0

// calc eye vector
dp3 r0.x,  v0, c4
dp3 r0.y,  v0, c5
dp3 r0.zw, v0, c6
add r6, -r0, c8

// normal map co-ords in oT0
mov oT0,v2

// tangent space basis in (oT1-3).xyz
dp3 oT1.x, v3, c4
dp3 oT1.y, v4, c4
dp3 oT1.z, v1, c4

dp3 oT2.x, v3, c5
dp3 oT2.y, v4, c5
dp3 oT2.z, v1, c5

dp3 oT3.x, v3, c6
dp3 oT3.y, v4, c6
dp3 oT3.z, v1, c6

// eye vector in (oT1-3).w
mov oT1.w,r6.x
mov oT2.w,r6.y
mov oT3.w,r6.z