#include "common_fog_vs_forcevertexfog_fxc.h"
#include "common_vs_fxc.h"

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

struct VS_INPUT
{
	float4 vPos				: POSITION;
	float4 vNormal			: NORMAL;
	float4 vBoneWeights		: BLENDWEIGHT;
	float4 vBoneIndices		: BLENDINDICES;
	float2 vBaseTexCoord	: TEXCOORD0;
};

struct VS_OUTPUT
{
    float4 projPos						: POSITION;			// Projection-space position	

	#if ( HARDWAREFOGBLEND )
		float fog						: FOG;
	#else
		float fog						: TEXCOORD0;
	#endif

	float2 vBaseTexCoord				: TEXCOORD1;

	#if ( FLASHLIGHT )
		float3 worldPos					: TEXCOORD2;
		float3 worldNormal				: TEXCOORD3;
	#endif
};

VS_OUTPUT main( const VS_INPUT v )
{
	VS_OUTPUT o;

	float3 worldPos, vNormal, worldNormal;

	#if ( FLASHLIGHT )
	{
		DecompressVertex_Normal( v.vNormal, vNormal );
		SkinPositionAndNormal( SKINNING, v.vPos, vNormal, v.vBoneWeights, v.vBoneIndices, worldPos, worldNormal );
		o.worldPos = worldPos;
		o.worldNormal = worldNormal;
	}
	#else
	{
		SkinPosition( SKINNING, v.vPos, v.vBoneWeights, v.vBoneIndices, worldPos );
	}
	#endif

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

	#ifdef _PS3
	{
		// Account for OpenGL's flipped y coordinate and expanded z range [-1,1] instead of [0,1]
		o.projPos.y = -o.projPos.y;
		o.projPos.z = 2.0f * o.projPos.z - o.projPos.w;
	}
	#endif // _PS3

	#if ( HARDWAREFOGBLEND )
	{
		o.fog = CalcFixedFunctionFog( worldPos, DOWATERFOG );
	}
	#else
	{
		o.fog = CalcNonFixedFunctionFog( worldPos, false );
	}
	#endif

	o.vBaseTexCoord = v.vBaseTexCoord;

	return o;
}