struct Attributes
{
	float4 positionOS 	: POSITION;
	float4 normalOS 	: NORMAL;
	float4 tangentOS 	: TANGENT;

	UNITY_VERTEX_INPUT_INSTANCE_ID
};

struct Varyings
{
    half  fogFactor 	: TEXCOORD1;
	//wPos.x in w-component
	float4 normalWS 	: NORMAL;
	//wPos.y in w-component
	float4 tangent 		: TANGENT;
	//wPos.z in w-component
	float4 bitangent 	: TEXCOORD4;

	float4 positionNDC 	: TEXCOORD5;
	
	float4 positionCS 	: SV_POSITION;
	
	UNITY_VERTEX_INPUT_INSTANCE_ID
};


Varyings LitPassVertex(Attributes input)
{
	Varyings output = (Varyings)0;

	UNITY_SETUP_INSTANCE_ID(input);
	UNITY_TRANSFER_INSTANCE_ID(input, output);

	float3 positionWS = TransformObjectToWorld(input.positionOS.xyz);
	
	VertexNormalInputs normalInput = GetVertexNormalInputs(input.normalOS.xyz, input.tangentOS);
	
	//WaveInfo waves = GetWaveInfo(uv, TIME_VERTEX * _WaveSpeed, _WaveHeight, lerp(1, 0, vertexColor.b), _WaveFadeDistance.x, _WaveFadeDistance.y);
	WaveInfo waves = GetWaveInfo(positionWS.xz, TIME_VERTEX * _WaveSpeed, _WaveHeight, 1, _WaveFadeDistance.x, _WaveFadeDistance.y);

    //waves.normal = normalInput.normalWS;
    //waves.position = 0;
	
	//Apply vertex displacements
	positionWS += waves.position.xyz;

    float4 positionCS = TransformWorldToHClip(positionWS);

	output.positionCS = positionCS;

    float4 ndc = positionCS * 0.5f;
    ndc.xy = float2(ndc.x, ndc.y * _ProjectionParams.x) + ndc.w;
    ndc.zw = positionCS.zw;
	output.positionNDC = ndc; 
	
	output.normalWS = float4(waves.normal, positionWS.x);
	output.tangent = float4(normalInput.tangentWS, positionWS.y);
	output.bitangent = float4(normalInput.bitangentWS, positionWS.z);
    output.fogFactor = ComputeFogFactor(positionCS.z);

	return output;
}