#ifndef _GRADIENTDISSOLVE
#define _GRADIENTDISSOLVE
 


void GradientedDissolve_float(
    UnityTexture2D NoiseTexture, UnityTexture2D GUITexture,
    UnitySamplerState NoiseSS,
    half2 UV, float noiseScale,
    half NoisePow, half Width, half Th,
    out half4 _out
    )
{
    half noise = SAMPLE_TEXTURE2D(NoiseTexture,  NoiseSS, UV * noiseScale).r;
    noise = pow(noise, NoisePow);
    //noise = noise * (1-UV.x);
    //Th = 1;
    noise += Th;
    _out = 0;
    half4 guiSample = SAMPLE_TEXTURE2D_LOD(GUITexture, NoiseSS, UV, 0);

    if (noise >= 1)
    {
        noise = 1.0;
        _out = guiSample;
        //if ((noise + Th Width ) >= 1.0)
        //{
        //}
        //_out = half4(1,1,1,1);
    }
    
    else if ((noise + Width ) >= 1.0)
    {
        half4 guiSampleLow = SAMPLE_TEXTURE2D_LOD(GUITexture, NoiseSS, UV, 3);
        noise = (noise + Width - 1.0)/Width;
        _out = lerp(guiSampleLow, guiSampleLow, noise);
        //_out = half4(0,0,0,noise);
    }
    _out.a *= saturate(noise) * pow(Th, 0.3);
    
}

#endif