vs_2_0
dcl_position	v0
dcl_normal		v1
dcl_texcoord0	v3
dcl_texcoord6	v14
dcl_texcoord7	v15
#include "../../VertexShader.h"

;------------------------------------------------------------------------------
; Geometry transform
;------------------------------------------------------------------------------

; Calculate bone indices 
mad		r7, vIndices, c23.x, c23.y

; Initialize w-coordinate
mov		r0.w, C_ONE

; Calculate the second bone weight from the first
sub		r8.x, C_ONE, vWeights.x

; Skin position by bone 0
MOVA	a0.x, r7.x
m4x3	r0.xyz, vPos, c[a0.x]
mul		pPos, r0, vWeights.x

; Skin position by bone 1
MOVA	a0.x, r7.y
m4x3	r0.xyz, vPos, c[a0.x]
mad		pPos, r0, r8.x, pPos

; Skin normal by bone 0
MOVA	a0.x, r7.x
m3x3	pNormal.xyz, vNormal, c[a0.x]
NormalizeVector(pNormal)

; Transform skinned position to projection space
m4x4	OPOS, pPos, C_PROJECTION_MATRIX
FIXUP_OPOS
#include "..\..\VertexShader.h"

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

#define C_LIGHT_POSITION		c10
#define C_LIGHT_DIR				c11
#define C_SHADING_TYPE			c12

#define C_TEXGEN_MATRIX_1		c13
#define C_TEXGEN_MATRIX_2		c14
#define C_TEXGEN_MATRIX_3		c15

#define C_ATTENUATION_RANGE		c16


;------------------------------------------------------------------------------
; Diffuse color
;------------------------------------------------------------------------------

; Initialize diffuse color
mov		rFinalDiffuse, C_MATERIAL_COLOR

; Calculate the vertex-to-light vector, and project along the light's direction
add		rVertexToLight, C_LIGHT_POSITION, -pPos
dp3		rAtten.x, C_LIGHT_DIR, rVertexToLight

; Clip vertices behind the light to zero
sge		rTemp.x, rAtten.x, C_LIGHT_POSITION.w
mul		rFinalDiffuse.w, rFinalDiffuse.w, rTemp.x

; Apply N-dot-L shading to the diffuse alpha
NormalizeVector(rVertexToLight)
dp3		rLightCoeff.x, pNormal, C_LIGHT_DIR					; Directional light shading
dp3		rLightCoeff.y, pNormal, rVertexToLight				; Point light shading
mov		rLightCoeff.z, C_ZERO
dp3		rLightCoeff, rLightCoeff, C_SHADING_TYPE			; Select type of shading to apply
max		rLightCoeff.x, rLightCoeff.x, C_ZERO.x
mul		rFinalDiffuse.w, rFinalDiffuse.w, rLightCoeff.x

; Scale projected vertex-to-light vector and apply to the diffuse alpha
mad		rAtten.x, rAtten.x, C_ATTENUATION_RANGE.x, C_ATTENUATION_RANGE.y
max		rAtten.x, rAtten.x, C_ZERO
min		rAtten.x, rAtten.x, C_ONE
mul		rFinalDiffuse.w, rFinalDiffuse.w, rAtten.x

; Copy the final color to output
mov		oD0, rFinalDiffuse
#include "..\..\VertexShader.h"

;------------------------------------------------------------------------------
; Fog calculation
;------------------------------------------------------------------------------
#include "..\..\VertexShader.h"

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

#define C_LIGHT_POSITION		c10
#define C_LIGHT_DIR				c11
#define C_SHADING_TYPE			c12

#define C_TEXGEN_MATRIX_1		c13
#define C_TEXGEN_MATRIX_2		c14
#define C_TEXGEN_MATRIX_3		c15

#define C_ATTENUATION_RANGE		c16
#define C_INTERPOLATION_RANGE	c17


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

; Apply texture matrix to position to generate texture coordinates
#ifdef _XBOX
dp4		oT0.x, pPos, C_TEXGEN_MATRIX_1
#else
dp4		oT0, pPos, C_TEXGEN_MATRIX_1
#endif
dp4		oT0.y, pPos, C_TEXGEN_MATRIX_2

; Third texture coordinate needed for perspective divide
dp4		oT0.w, pPos, C_TEXGEN_MATRIX_3

; Copy texcoords for base texture
mul		oT1.xy, vTexCoords, C_TEXCOORD_DECOMPRESS