#include "VertexShader.h"

;------------------------------------------------------------------------------
; Defines
;------------------------------------------------------------------------------

#define C_EYE_POSITION			c10
#define C_MODEL_VIEW_MATRIX_0   c14
#define C_MODEL_VIEW_MATRIX_1   c15
#define C_MODEL_VIEW_MATRIX_2   c16
#define C_MODEL_VIEW_MATRIX_3   c17
#define C_MODEL_VIEW_MATRIX     C_MODEL_VIEW_MATRIX_0


;------------------------------------------------------------------------------
; Vertex transformation
;------------------------------------------------------------------------------

; Transform to projection space
m4x4	OPOS, vPos, C_PROJECTION_MATRIX
FIXUP_OPOS



;------------------------------------------------------------------------------
; Lighting calculation
;------------------------------------------------------------------------------

; Compute the normalized vertex to eye vector
add		rVertexToEye, C_EYE_POSITION, -vPos
NormalizeVector(rVertexToEye)

; Dot with vertex normal and take absolute value
dp3		rLightCoeff.x, vNormal, rVertexToEye
max		rLightCoeff.x, rLightCoeff.x, -rLightCoeff.x
sub     rLightCoeff.x, C_ONE, rLightCoeff.x
mad     rLightCoeff.x, rLightCoeff.x, c11.x, c11.y

; Modulate with constant diffuse
mul		oD0, rLightCoeff.x, C_MATERIAL_COLOR
;mov oD0, C_MATERIAL_COLOR

; Calculate fog factor
CalculateLayeredFog(vPos, oFog)

;------------------------------------------------------------------------------
; Texture coordinates
;------------------------------------------------------------------------------

dp3 r0.x, vNormal, C_MODEL_VIEW_MATRIX_0
dp3 r0.y, vNormal, C_MODEL_VIEW_MATRIX_1
;mad     oT0.xy, r0, c11.zz, c11.ww

mov oT0.xy, c11.zz

; Copy base tex coords
;mov		oT0.xy, vTexCoords