FUNCTION IfcConstraintsParamBSpline
(* SCHEMA IFC4; *)
FUNCTION IfcConstraintsParamBSpline
( Degree, UpKnots, UpCp : INTEGER;
KnotMult : LIST OF INTEGER;
Knots : LIST OF IfcParameterValue )
: BOOLEAN;
LOCAL
Result : BOOLEAN := TRUE;
K, Sum : INTEGER;
END_LOCAL;
(* Find sum of knot multiplicities. *)
Sum := KnotMult[1];
REPEAT i := 2 TO UpKnots;
Sum := Sum + KnotMult[i];
END_REPEAT;
(* Check limits holding for all B-spline parametrisations *)
IF (Degree < 1) OR (UpKnots < 2) OR (UpCp < Degree) OR
(Sum <> (Degree + UpCp + 2)) THEN
Result := FALSE;
RETURN(Result);
END_IF;
K := KnotMult[1];
IF (K < 1) OR (K > Degree + 1) THEN
Result := FALSE;
RETURN(Result);
END_IF;
REPEAT i := 2 TO UpKnots;
IF (KnotMult[i] < 1) OR (Knots[i] <= Knots[i-1]) THEN
Result := FALSE;
RETURN(Result);
END_IF;
K := KnotMult[i];
IF (i < UpKnots) AND (K > Degree) THEN
Result := FALSE;
RETURN(Result);
END_IF;
IF (i = UpKnots) AND (K > Degree + 1) THEN
Result := FALSE;
RETURN(Result);
END_IF;
END_REPEAT;
RETURN(result);
END_FUNCTION;
Referenced By
Defintion IfcConstraintsParamBSpline is references by the following definitions:
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2016-06-01T11:21:49-04:00