// EMERGENT GAME TECHNOLOGIES PROPRIETARY INFORMATION
//
// This software is supplied under the terms of a license agreement or
// nondisclosure agreement with Emergent Game Technologies and may not 
// be copied or disclosed except in accordance with the terms of that 
// agreement.
//
//      Copyright (c) 1996-2007 Emergent Game Technologies.
//      All Rights Reserved.
//
// Emergent Game Technologies, Chapel Hill, North Carolina 27517
// http://www.emergent.net

ps_1_1

def c1, 1.0f, 0.0f, 0.0f, 1.0f

tex  t0                      ;Sample normal map
texcoord t1                  ;Load up D1

mov r0, c0           ;Output diffuse color.

;Get (1- N.V) ^ 2 for alpha.
dp3 r1.rgba, t0_bx2, t1_bx2
add r1.rgba, c1.a, -r1.rgba
;mul r1.a, r1.a, r1.a
mul r0.a, r1.a, r1.a