//========= Copyright © 1996-2006, Valve Corporation, All rights reserved. ============//

// DYNAMIC: "COMPRESSED_VERTS"          "0..1"
// DYNAMIC: "SKINNING"                  "0..1"

// Includes
#include "common_vs_fxc.h"

const float4 g_mBaseTexCoordTransform[2] : register( SHADER_SPECIFIC_CONST_1 );
                                                   //SHADER_SPECIFIC_CONST_2
const float4 vEyePos : register(c1);

struct VS_OUTPUT
{
    float4 Position              : POSITION;
    float2 vFragPos              : TEXCOORD0;
    float2 vBaseCoord            : TEXCOORD1;
    float3 vNormal               : TEXCOORD2;
    float3 vViewDir              : TEXCOORD3;
    float3 worldPos_projPosZ     : TEXCOORD4;
    float3 lightAtten            : TEXCOORD5;
    float3 detailTexCoord_atten3 : TEXCOORD6;
    float3 vBinormal             : TEXCOORD7;
    float3 vTangent              : TEXCOORD8;
    float3 wCameraPosition       : TEXCOORD9;



};



// Structs
struct VS_INPUT
{
    float4 vPos                 : POSITION;     // Position
    float4 vNormal              : NORMAL;       // Normal
    float4 vBoneWeights         : BLENDWEIGHT;  // Skin weights
    float4 vBoneIndices         : BLENDINDICES; // Skin indices
    float4 vTexCoord0           : TEXCOORD0;    // Base texture coordinates
    float4 vUserData            : TANGENT;

};




VS_OUTPUT main( const VS_INPUT i )
{

    VS_OUTPUT o;



    // Decompress compressed normal and tangent
    float4 vObjPosition = i.vPos.xyzw;
    float3 vObjNormal;
    float4 vObjTangent;
    DecompressVertex_NormalTangent( i.vNormal, i.vUserData, vObjNormal, vObjTangent );

    // Transform the position
    float3 vWorldPosition = { 0.0f, 0.0f, 0.0f };
    float3 vWorldNormal = { 0.0f, 0.0f, 0.0f };
    float3 vWorldTangent = { 0.0f, 0.0f, 0.0f };
    float3 vWorldBinormal = { 0.0f, 0.0f, 0.0f };


    SkinPositionNormalAndTangentSpace( false, vObjPosition, vObjNormal.xyz, vObjTangent.xyzw, i.vBoneWeights, i.vBoneIndices, vWorldPosition, vWorldNormal, vWorldTangent, vWorldBinormal );

    vWorldPosition = vWorldPosition;
    vWorldNormal.xyz = normalize( vWorldNormal.xyz );
    vWorldTangent.xyz = normalize( vWorldTangent.xyz );
    vWorldBinormal.xyz = normalize( vWorldBinormal.xyz );


    float4 projPosition = mul( float4( vWorldPosition, 1.0f ), cViewProj );
    projPosition.z = dot( float4( vWorldPosition, 1 ), cViewProjZ );

    o.Position = projPosition;
    o.vFragPos = projPosition.xy;
    o.vBaseCoord = i.vTexCoord0;
    o.vNormal    = vWorldNormal;
    o.vViewDir   = vWorldPosition - vEyePos;
    o.worldPos_projPosZ = float4( vWorldPosition, projPosition.z );
    //o.lightAtten = float3(1,1,1);
    //o.detailTexCoord_atten3 = float3(0,0,0);
    //o.mvpos    = i.vPos;

    o.lightAtten.x = GetVertexAttenForLight( vWorldPosition, 0, true );
    o.lightAtten.y = GetVertexAttenForLight( vWorldPosition, 1, true );
    o.lightAtten.z = GetVertexAttenForLight( vWorldPosition, 2, true );
    o.detailTexCoord_atten3 = float3(0,0,GetVertexAttenForLight( vWorldPosition, 3, true ));
    o.vBinormal    = vWorldBinormal;
    o.vTangent     = vWorldTangent;
    o.wCameraPosition = vEyePos;



    return o;




}