#include <engine/spacial.hpp>
#include <common/array.hpp>

SpacialTransform::~SpacialTransform()
{
}

BOOL SpacialTransform::transform(Array<int> &srcVector,Array<int> &dstVector,WORD sizeFactor)
{
	int inverseFactor((100.00/(float)sizeFactor)*100.00);
	int outSegment(inverseFactor);
  int inSegment(100);
	int nextDestIndex(0);
	int accumulator(0);

	mNextInputIndex=-1;
	dstVector.size((srcVector.size()*sizeFactor)/100.00);
	if(!nextInput(srcVector))return FALSE;
	while(TRUE)
	{
	  if(outSegment<=inSegment)
		{
		  accumulator+=((inSegment*mCurrentValue)+((100-inSegment)*mNextValue))*outSegment;
			inSegment-=outSegment;
			outSegment=inverseFactor;
			accumulator*=(float)sizeFactor*.000001;
			if(nextDestIndex>=dstVector.size())break;
			dstVector[nextDestIndex++]=accumulator;
			accumulator=0;
		}
		else
		{
		  accumulator+=((inSegment*mCurrentValue)+((100-inSegment)*mNextValue))*inSegment;
			outSegment-=inSegment;
			inSegment=100;
			if(!nextInput(srcVector))break;
		}
	}
	return false;
}

BOOL SpacialTransform::nextInput(Array<int> &srcVector)
{
  if(++mNextInputIndex>=srcVector.size())return FALSE;
	mCurrentValue=srcVector[mNextInputIndex];
	if(mNextInputIndex+1>=srcVector.size())mNextValue=mCurrentValue;
	else mNextValue=srcVector[mNextInputIndex+1];
	return TRUE;
}