FUNCTION gbsf_check_curve

(* SCHEMA technical_data_packaging; *)

  FUNCTION gbsf_check_curve(
               cv: representation_item
      ): BOOLEAN;
    IF SIZEOF(['TECHNICAL_DATA_PACKAGING.BOUNDED_CURVE',
        'TECHNICAL_DATA_PACKAGING.CONIC',
        'TECHNICAL_DATA_PACKAGING.CURVE_REPLICA',
        'TECHNICAL_DATA_PACKAGING.LINE',
        'TECHNICAL_DATA_PACKAGING.OFFSET_CURVE_3D'] * TYPEOF(cv)) > 1 THEN
      RETURN(FALSE);
    END_IF;
    IF SIZEOF(['TECHNICAL_DATA_PACKAGING.CIRCLE',
        'TECHNICAL_DATA_PACKAGING.ELLIPSE',
        'TECHNICAL_DATA_PACKAGING.TRIMMED_CURVE'] * TYPEOF(cv)) = 1 THEN
      RETURN(TRUE);
    ELSE
      IF (('TECHNICAL_DATA_PACKAGING.B_SPLINE_CURVE' IN TYPEOF(cv)) AND (
          cv\b_spline_curve.self_intersect = FALSE)) OR (cv\b_spline_curve.
          self_intersect = UNKNOWN) THEN
        RETURN(TRUE);
      ELSE
        IF (('TECHNICAL_DATA_PACKAGING.COMPOSITE_CURVE' IN TYPEOF(cv)) AND
             (cv\composite_curve.self_intersect = FALSE)) OR (cv\
            composite_curve.self_intersect = UNKNOWN) THEN
          RETURN(SIZEOF(QUERY ( seg <* cv\composite_curve.segments | (NOT 
              gbsf_check_curve(seg.parent_curve)) )) = 0);
        ELSE
          IF 'TECHNICAL_DATA_PACKAGING.CURVE_REPLICA' IN TYPEOF(cv) THEN
            RETURN(gbsf_check_curve(cv\curve_replica.parent_curve));
          ELSE
            IF ('TECHNICAL_DATA_PACKAGING.OFFSET_CURVE_3D' IN TYPEOF(cv)) 
                AND ((cv\offset_curve_3d.self_intersect = FALSE) OR (cv\
                offset_curve_3d.self_intersect = UNKNOWN)) AND (NOT (
                'TECHNICAL_DATA_PACKAGING.POLYLINE' IN TYPEOF(cv\
                offset_curve_3d.basis_curve))) THEN
              RETURN(gbsf_check_curve(cv\offset_curve_3d.basis_curve));
            ELSE
              IF 'TECHNICAL_DATA_PACKAGING.PCURVE' IN TYPEOF(cv) THEN
                RETURN(gbsf_check_curve(cv\pcurve.reference_to_curve\
                    representation.items[1]) AND gbsf_check_surface(cv\
                    pcurve.basis_surface));
              ELSE
                IF 'TECHNICAL_DATA_PACKAGING.POLYLINE' IN TYPEOF(cv) THEN
                  IF SIZEOF(cv\polyline.points) >= 3 THEN
                    RETURN(TRUE);
                  END_IF;
                ELSE
                  IF 'TECHNICAL_DATA_PACKAGING.SURFACE_CURVE' IN TYPEOF(cv)
                       THEN
                    IF gbsf_check_curve(cv\surface_curve.curve_3d) THEN
                      REPEAT i := 1 TO SIZEOF(cv\surface_curve.
                          associated_geometry) BY 1;
                        IF 'TECHNICAL_DATA_PACKAGING.SURFACE' IN TYPEOF(cv
                            \surface_curve.associated_geometry[i]) THEN
                          IF NOT gbsf_check_surface(cv\surface_curve.
                              associated_geometry[i]) THEN
                            RETURN(FALSE);
                          END_IF;
                        ELSE
                          IF 'TECHNICAL_DATA_PACKAGING.PCURVE' IN TYPEOF(
                              cv\surface_curve.associated_geometry[i])
                               THEN
                            IF NOT gbsf_check_curve(cv\surface_curve.
                                associated_geometry[i]) THEN
                              RETURN(FALSE);
                            END_IF;
                          END_IF;
                        END_IF;
                      END_REPEAT;
                      RETURN(TRUE);
                    END_IF;
                  END_IF;
                END_IF;
              END_IF;
            END_IF;
          END_IF;
        END_IF;
      END_IF;
    END_IF;
    RETURN(FALSE);

  END_FUNCTION; -- gbsf_check_curve

Referenced By

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2012-03-27T17:18:35-04:00