double Tension(double x,void *pData)
{
	TENSION_DATA *pTensionData = (TENSION_DATA*)pData;
	
	x /= pTensionData->stripWidth;
	return (pTensionData->ts + pTensionData->tp*x*x + pTensionData->tc*0.5*(1.0-cos(2*PI*x)));
}