#include "../../VertexShader.h"

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

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

; Sum weighted blendshape position deltas
mul     rTemp, vBlend0, c24.x
mad     rTemp, vBlend1, c24.y, rTemp
mad     rTemp, vBlend2, c24.z, rTemp
mad     rTemp, vBlend3, c24.w, rTemp
mad     rTemp.xyz, c26.x, rTemp, vPos
mov     rTemp.w, C_ONE

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

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

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

; Sum weighted blendshape normal deltas
mul     rTemp, vBlendNorm0, c25.x
mad     rTemp, vBlendNorm1, c25.y, rTemp
mad     rTemp, vBlendNorm2, c25.z, rTemp
mad     rTemp, vBlendNorm3, c25.w, rTemp
mad		rTemp, c26.x, rTemp, vNormal

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

; Transform skinned position to projection space
m4x4	OPOS, pPos, C_PROJECTION_MATRIX
FIXUP_OPOS