; This code initializes registers for vertex light
; processing. The actual routines will follow this
; code.

#pragma screenspace

xvs.1.1

; Normalize the transformed vertex normals
mul r0.xyz, r9.xyz, r9.xyz
add r1.x, r0.x, r0.y
add r2.x, r1.x, r0.z
rsq r3.x, r2.x
mul r9.xyz, r9.xyz, r3.x

; Set a0.x to first light's data block.
mov r0.x, c[LIGHT_BASE_ADDRESS].w
mov a0.x, r0.x