public ApCell(DPoint c, ApDetail[] details) { RefC = c; Details = details; RefZ = new DPoint(0, 0); xSq = 0; ySq = 0; _coeffs = new ApCoeffs(3); _coeffHistory = new RingBuf <ApCoeffs>(10, CopyOrSet); _zHistory = new RingBuf <DPoint>(10, CopyOrSet2); }