//#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
//#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Version.hlsl"
//#if VERSION_GREATER_EQUAL(10, 0)
//#include "Packages/com.unity.render-pipelines.universal/Editor/ShaderGraph/Includes/ShaderPass.hlsl"
//#endif

//#if VERSION_GREATER_EQUAL(10,0)
#define SHADOWPASS ( SHADERPASS == SHADERPASS_SHADOWCASTER )
//#else
//#define SHADOWPASS defined(SHADERPASS_SHADOWCASTER)
//#endif


float Dither32(float2 Pos) {
    float Ret = dot( float3(Pos.xy, 0.5f), float3(0.40625f, 0.15625f, 0.46875f ) );
    return frac(Ret);
}

void CameraFade_float(
//  Base inputs
    float4 positionSP,
    float3 positionWS,
    float  CameraInversFadeRange,
    float  CameraInversFarFadeRange,
    float  CameraFadeDist,
    float  CameraFarFadeDist,
    float  AlphaIN,
    float  AlphaTh,

    out real Alpha

) {
	#if SHADOWPASS
    	//Alpha = AlphaIN * saturate( (positionSP.w - CameraFadeDist) * CameraInversFadeRange - Dither32(positionSP.xy / positionSP.w * _ScreenParams.xy ) );
        Alpha = AlphaIN;
    #else
    	float distanceToCam = distance(positionWS, GetCameraPositionWS() );
        float a = saturate((distanceToCam - CameraFadeDist) * CameraInversFadeRange) * saturate((CameraFarFadeDist - distanceToCam)* CameraInversFarFadeRange);
    	//Alpha = AlphaIN * saturate( saturate(distanceToCam - CameraFadeDist) * saturate(CameraFarFadeDist - distanceToCam)* CameraInversFadeRange - Dither32(positionSP.xy / positionSP.w * _ScreenParams.xy ) );
    	Alpha = AlphaIN * saturate(a+AlphaTh - Dither32(positionSP.xy / positionSP.w * _ScreenParams.xy ) );
        //Alpha = AlphaIN;
    #endif
}