//	STATIC: "VERTEXCOLOR"		"0..1"
//	STATIC: "MODEL"				"0..1"

#include "common_vs_fxc.h"

static const bool g_bSkinning		= false;
static const int  g_FogType			= 0;

#include "unlittwotexture_constants_fxc.h"
#include "common_cbuffers_fxc.h"

CBUFFER_SKINNING(register(b0))
CBUFFER_PERFRAME(register(b1))
CBUFFER_PERSCENE(register(b2))

/*cbuffer UnlitTwoTexture_CBuffer : register(b3)
{
	UnlitTwoTexture_t c;
};*/

#define cBaseTexCoordTransform c.cBaseTextureTransform
#define cBaseTexCoordTransform2 c.cBaseTexture2Transform

struct VS_INPUT
{
	// This is all of the stuff that we ever use.
	float4 vPos				: POSITION;
	float4 vBoneWeights		: BLENDWEIGHT;
	uint4 vBoneIndices		: BLENDINDICES;
	float4 vNormal			: NORMAL;
	float4 vColor			: COLOR;
	float3 vSpecular		: SPECULAR;
	// make these float2's and stick the [n n 0 1] in the dot math.
	float2 vTexCoord0		: TEXCOORD0;

	// Position and normal/tangent deltas
	float3 vPosFlex			: FLEXDELTA;
	float3 vNormalFlex		: FLEXNORMAL;
};

struct VS_OUTPUT
{
    float4 projPos					: SV_POSITION;			// Projection-space position	
	HALF2 baseTexCoord				: TEXCOORD0;		// Base texture coordinate
	float4 vertexColor				: TEXCOORD1;
	float3 eyeSpacePos				: TEXCOORD2;
	float3 normals					: TEXCOORD3;
	float4 worldPos_projPosZ		: TEXCOORD7;		// Necessary for water fog dest alpha
};

VS_OUTPUT main( const VS_INPUT v )
{
	VS_OUTPUT o = ( VS_OUTPUT )0;
	
	float4 vPosition = float4(v.vPos.xyz, 1.0f);

	// Perform skinning
	float3 worldNormal, worldPos;

	worldPos = mul4x3( vPosition, (float4x3)cModel[0] );
	worldNormal = mul3x3( v.vNormal.xyz, ( const float3x3 )cModel[0] );

	float4x4 viewProj = mul(cViewMatrix, cProjMatrix);

	// Transform into projection space
	float4 projPos = mul( float4( worldPos, 1 ), viewProj );
	o.projPos = projPos;

	o.eyeSpacePos = mul(float4(worldPos, 1), cViewMatrix).xyz;
	
	// Needed for water fog alpha; 
	// FIXME: we shouldn't have to compute this all thie time.
	o.worldPos_projPosZ = float4( worldPos.xyz, projPos.z );

	// Base texture coordinates
    o.baseTexCoord = v.vTexCoord0.xy;

#if VERTEXCOLOR
	o.vertexColor = v.vColor;
	#else
	o.vertexColor = 1.0f.xxxx;
#endif
	
    o.normals = v.vNormal.xyz;

	return o;
}