;#define CV_ZERO 0
;#define CV_ONE 1

;#define CV_WORLDVIEWPROJ_0 2
;#define CV_WORLDVIEWPROJ_1 3
;#define CV_WORLDVIEWPROJ_2 4
;#define CV_WORLDVIEWPROJ_3 5

;#define CV_WORLDVIEW_0 6
;#define CV_WORLDVIEW_1 7
;#define CV_WORLDVIEW_2 8
;#define CV_WORLDVIEW_3 9

;#define CV_WORLDVIEWIT_0 10
;#define CV_WORLDVIEWIT_1 11
;#define CV_WORLDVIEWIT_2 12

;#define CV_WORLD_0 13
;#define CV_WORLD_1 14
;#define CV_WORLD_2 15
;#define CV_WORLD_3 16

;#define CV_HALF 18

;#define CV_LIGHT_COLOR 19
;#define CV_ONE_OVER_LIGHT_RANGE 20

;#define CV_LIGHT_DIRECTION 21
;#define CV_LIGHT_POSITION 22

;#define CV_BUMP_SCALE 23

;#define CV_EYE_POS_WORLD      24

;#define V_POSITION		v0
;#define V_NORMAL		v1
;#define V_DIFFUSE		v2
;#define V_TEXTURE		v3
;#define V_SxT			v4
;#define V_S				v5
;#define V_T				v6


;#define S_WORLD			r0
;#define T_WORLD			r1
;#define SxT_WORLD		r2
;#define LIGHT_LOCAL		r3
;#define VERTEX_WORLD    r4
;#define EYE_VECTOR		r5

;#define HALF_ANGLE		r7


vs.1.0

; Transform position to clip space and output it
dp4 oPos.x, v0, c[2]
dp4 oPos.y, v0, c[3]
dp4 oPos.z, v0, c[4]
dp4 oPos.w, v0, c[5]

; Get V
;mul r8.xyz, v5.yzx,v1.zxy
;mad r8.xyz, -v1.yzx, v5.zxy, r8.xyz
;dp3 r8.w, r8, r8
;rsq r8.w, r8.w
;mul r8, r8, r8.w

; Transform basis vectors to world space
dp3 r0.x, v5, c[13]
dp3 r0.y, v5, c[14]
dp3 r0.z, v5, c[15]


dp3 r1.x, v6, c[13]
dp3 r1.y, v6, c[14]
dp3 r1.z, v6, c[15]

dp3 r2.x, v1, c[13]
dp3 r2.y, v1, c[14]
dp3 r2.z, v1, c[15]

mul r0.xyz, r0.xyz, c[23].w
mul r1.xyz, r1.xyz, c[23].w

; transform light by basis vectors to put it
; into texture space
dp3 r3.x, r0.xyz, c[21]
dp3 r3.y, r1.xyz, c[21]
dp3 r3.z, r2.xyz, c[21]

; Normalize the light vector
dp3 r3.w, r3, r3
rsq r3.w, r3.w
mul r3, r3, r3.w


/////////////////////////////////////
// Calculate half angle vector

// transform vertex position to world space
//  to calculate V, vector to viewer in world
//  space.

dp4 r4.x, v0, c[13]
dp4 r4.y, v0, c[14]
dp4 r4.z, v0, c[15]

; Half angle vector is  (L+V)/||L+V||  or Normalize( L+V )
;  ||a|| is magnitude of a
;  L = vec to light from vertex point
;  V = vec to viewer from vertex point

// vertex position - eye position
// eye position - vertex position
add r5,  c[ 24 ], -r4.xyz


; Normalize eye vec
dp3 r5.w, r5, r5
rsq r5.w, r5.w
mul r5,   r5, r5.w

// Add them to average & create half angle vector
add r7,  c[21], r5


;  Normalize it
dp3 r7.w, r7, r7
rsq r7.w, r7.w
mul r7,   r7, r7.w

/////////////////////////////////////////////////
; Transform half angle vector to local space and
;  output to tex coord set 3 for specular calc

// Write result to a temporary r2 and use 1 extra
//  instruction for the mov so that we can output
//  it to diffuse color also.  Normaly, you should
//  write the result directly to oTn and save yourself
//  the mov instruction

;dp3 r2.x,  r7, r0
;dp3 r2.y,  r7, r1
;dp3 r2.z,  r7, r2
;mov r2.w,  c[ 1 ]

;mov oT3.x, r2.x
;mov oT3.y, r2.y
;mov oT3.z, r2.z
;mov oT3.w, r2.w


//@@@@@@@@@

;mov oT3.xyz, r2.xyz
;mov oT3.w, c[ 1 ]

;dp3 r2.x, r7, r0
;dp3 r2.y, r7, r1
;dp3 r2.z, r7, r2
;mov r2.w, c[ 1 ]
;mov oT3.xyzw, r2.xyzw

;dp3 r2.x,  r7, r0
;dp3 r2.y,  r7, r1
;dp3 r2.z,  r7, r2
;mov r2.w,  c[ 1 ]
;mov oT3.xyzw, r2.xyzw




dp3 oT3.x, r7, r0
dp3 oT3.y, r7, r1
dp3 oT3.z, r7, r2
mov oT3.w, c[ 1 ]


/////////////////////////////////////
// move light vector to TC 2


mov oT2, r3
mov oT2.w, c[1].w		// w to 0


; output tex coords
mov oT0, v3
mov oT1, v3


//////////////////////////////////////////////
// Additional output of light vector to 
// diffuse color for visualization in the
// demo

;mul  r1,  r3, c[18]
;add  oD0, r1,          c[18]

//////////////////////////////////////////////
// move half angle vector to unsigned diffuse
//   color for visualization in the demo
// Bias from [-1,1] to the range [0,1]

//@@@@@@@@@			turn this off - debug only!

dp3 r2.x,  r7, r0
dp3 r2.y,  r7, r1
dp3 r2.z,  r7, r2
mov r2.w,  c[ 1 ]

mul  r2,  r2,   c[18]
add  oD0, r2,   c[18]


//////////////////////////////////////////////