///////////////////////////////////////////////////////////////////////////////
//
//      ##  ######
//       ######  ###
//  ## ###############        Shark 3D Engine (www.shark3d.com)
//   ########## # # #
//    ########                Copyright (c) 1996-2006 Spinor GmbH.
//   ######### # # #          All rights reserved.
//  ##   ##########
//      ##
//
///////////////////////////////////////////////////////////////////////////////

#include \
    <levelutil/shader/prog/d3d9_hlsl/include_stddef_d3d9_hlsl.s3d_shadercode_run>

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

struct VS_INPUT
{
    float4 posObj: POSITION;
    S3D_BONE_DECL_STD(boneWgh, boneSubscr)
    float2 tex0:TEXCOORD0;
   float3 normal:NORMAL;
};

struct VS_OUTPUT
{
    float4 posScr    : POSITION;
    float3 worldV     : TEXCOORD0;
    float3 WNormal   : TEXCOORD1;
    float3 CUBEPos   : TEXCOORD2;
    float3 lastCenter :TEXCOORD3;
};

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

S3D_MATBONE_DECL_STD(matBone)


///////////////////////////////////////////////////////////////////////////////
// Vertexshader
// Profile: 1x1
const float4x4 matView;
const float4x4 modelViewInv;
const float4x4 viewToWorld;
const float4x4 viewToWorldInv;
const float4x4 lightViewProj;
const float4 lastCenter;
const float4 lightPosView;

VS_OUTPUT main(VS_INPUT input)
{
    VS_OUTPUT output = (VS_OUTPUT)0;

    float4x4 matBoneFinal;
    S3D_BONE_TRANSF_STD(matBoneFinal, matBone, input.boneWgh, input.boneSubscr);
    // Transform vevertices by matBoneFinal ---> view space
    float4 posView = mul(input.posObj, matBoneFinal);
    // light position in world space
    float3 lightWPos = mul(float4(lightPosView.xyz,1), viewToWorld).xyz;
    // vertex position in world space
    float3 WPos = mul(posView, viewToWorld).xyz;
    // direction vector from light to shaded point in world space
    output.worldV = WPos - lightWPos;
    // vertex position in cubemap space
    output.CUBEPos = WPos - lastCenter;
    // vertex normal in world space
    output.WNormal = mul(mul(viewToWorldInv, modelViewInv),input.normal);
    // vertex position in light space
    output.posScr = mul(posView, lightViewProj);
    
    output.lastCenter = WPos.xyz;
    
    return output;
}

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