IfcMakeArrayOfArray

Semantic definitions at the function

Function Definition

NOTE Definition according to ISO/CD 10303-42:1992
This function make array of array builds an array of arrays from a list of lists. The function first checks that the specified array dimensions are compatible with the sizes of the lists, and in particular, verifies that all the sub-lists contain the same number of elements. A null result is returned if the input data is incompatible with the dimensions. This function is used to construct the arrays of control points and weights for a B-spline surface.

NOTE Function adapted from make_array_of_array defined in ISO 10303-42.

HISTORY New function in IFC4

Formal representations

EXPRESS Specification


FUNCTION IfcMakeArrayOfArray


(Lis : LIST[1:?] OF LIST [1:?] OF GENERIC : T;
 Low1, U1, Low2, U2 : INTEGER):
ARRAY [Low1:U1] OF ARRAY [Low2:U2] OF GENERIC : T;

  LOCAL
    Res : ARRAY[Low1:U1] OF ARRAY [Low2:U2] OF GENERIC : T;
  END_LOCAL;

  (* Check input dimensions for consistency *)
  IF (U1-Low1+1) <> SIZEOF(Lis) THEN
    RETURN (?);
  END_IF;
  IF (U2 - Low2 + 1 ) <> SIZEOF(Lis[1]) THEN
    RETURN (?) ;
  END_IF;

  (* Initialise Res with values from Lis[1] *)
  Res := [IfcListToArray(Lis[1], Low2, U2) : (U1-Low1 + 1)];
  REPEAT i := 2 TO HIINDEX(Lis);
    IF (U2-Low2+1) <> SIZEOF(Lis[i]) THEN
      RETURN (?);
    END_IF;
    Res[Low1+i-1] := IfcListToArray(Lis[i], Low2, U2);
  END_REPEAT;
  RETURN (Res);




END_FUNCTION;