#pragma kernel SortFloats

#define EVEN(x) (fmod((x),2)==0)
#define ODD(x)  (fmod((x),2)!=0)

RWStructuredBuffer<float> inputFloatBuffer;
RWStructuredBuffer<float> outputFloatBuffer;
RWStructuredBuffer<int> didSwapOccur;
int bufferLength = 0;
uint _Iteration;

[numthreads(32, 1, 1)]
void SortFloats(uint id : SV_DispatchThreadID)
{
    float C = inputFloatBuffer[id.x]; // Centre
	float result = C;
    if ( ( EVEN(_Iteration) && EVEN(id.x) ) ||
        ( ODD (_Iteration) && ODD (id.x) )
    )
    {
		if(id.x < bufferLength - 1)
		{
			float R = inputFloatBuffer[id.x + 1]; // Left
			result = min(R, C);
		}
    }
    else
    {
		if(id.x > 0)
		{
			// Min operation
			float L = inputFloatBuffer[id.x - 1]; // Right
			result = max(C, L);
		}
    }

	if(result != C && id.x >= 0 && id.x < bufferLength)
		didSwapOccur[0] = 0;

    outputFloatBuffer[id.x] = result;
}