ISO 10303-42:2021(E)


Integrated generic resource: Geometric and topological representation	ISO 10303-42:2021(E) © ISO

Cover page
Table of contents
Copyright
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
3.2 Abbreviated terms

4 Geometry
4.1 General
4.2 Fundamental concepts and assumptions
4.3 Geometry constant definition
4.4 Geometry type definitions
4.5 Geometry entity definitions
4.6 Geometry function definitions
4.7 Geometry rule definitions
5 Topology
5.1 General
5.2 Fundamental concepts and assumptions
5.3 Topology constant definition
5.4 Topology type definitions
5.5 Topology entity definitions
5.6 Topology function definitions
6 Geometric model
6.1 General
6.2 Fundamental concepts and assumptions
6.3 Geometric model type definitions
6.4 Geometric model entity definitions
6.5 Geometric model function definitions
7 Scan data 3d shape model
7.1 General
7.2 Fundamental concepts and assumptions
7.3 Scan data 3d shape model type definition
7.4 Scan data 3d shape model entity definitions
7.5 Scan data 3d shape model function definitions

A Short names of entities
B Information object registration
C Computer interpretable listings
D EXPRESS-G diagrams
E Change history
Bibliography
Index


         (*
ISO/TC 184/SC 4/WG 12 N10694 - ISO 10303-42 Geometric and topological representation - EXPRESS
Supersedes 
         ISO/TC 184/SC 4/WG 12 N9204
*)




            SCHEMA scan_data_3d_shape_model_schema;


         REFERENCE FROM 
         measure_schema   -- ISO 10303-41
  (global_unit_assigned_context,

           
         positive_length_measure);


         REFERENCE FROM 
         representation_schema   -- ISO 10303-43
  (representation,

           
         representation_item,

           
         using_representations);


         REFERENCE FROM 
         product_property_representation_schema   -- ISO 10303-41
  (shape_representation);


         REFERENCE FROM 
         support_resource_schema   -- ISO 10303-41
  (label);


         REFERENCE FROM 
         geometry_schema   -- ISO 10303-42
  (axis2_placement_3d,

           
         geometric_representation_item,

           
         geometric_representation_context);


TYPE point_cloud_set_or_superset =
         
         
         SELECT

            (point_cloud_dataset, 
    point_cloud_superdataset);

         END_TYPE;


ENTITY scan_data_shape_representation

           SUBTYPE OF (shape_representation);

           SELF\representation.items : SET[1:?] OF scanned_data_item;
WHERE

           WR1: 'REPRESENTATION_SCHEMA.GLOBAL_UNIT_ASSIGNED_CONTEXT' IN TYPEOF(SELF\representation.context_of_items);

         
         END_ENTITY;


ENTITY scanned_data_item

           SUPERTYPE OF 
         (ONEOF (point_cloud_dataset,
                       point_cloud_superdataset,
                       triangulated_point_cloud_dataset,
                       scan_3d_model))

           SUBTYPE OF (geometric_representation_item);
WHERE

           WR1: SIZEOF(QUERY(using_rep                <* using_representations(SELF)                | NOT ('SCAN_DATA_3D_SHAPE_MODEL_SCHEMA.SCAN_DATA_SHAPE_REPRESENTATION'
            IN TYPEOF(using_rep)))) =   0;

         
         END_ENTITY;


ENTITY point_cloud_dataset

           SUBTYPE OF (scanned_data_item);

           point_coordinates : LIST[1:?] OF LIST[3:3] OF REAL;

         
         END_ENTITY;


ENTITY point_cloud_dataset_with_normals

           SUBTYPE OF (point_cloud_dataset);

           normals : LIST[1:?] OF LIST[3:3] OF REAL;
WHERE

           WR1: SIZEOF(normals) = SIZEOF(SELF\point_cloud_dataset.point_coordinates);

         
         END_ENTITY;


ENTITY point_cloud_dataset_with_colours

           SUBTYPE OF (point_cloud_dataset);

           colour_indices : LIST[1:?] OF LIST[3:3] OF INTEGER;
WHERE

           WR1: SIZEOF(colour_indices) = SIZEOF(SELF\point_cloud_dataset.point_coordinates);

         
         END_ENTITY;


ENTITY point_cloud_dataset_with_intensities

           SUBTYPE OF (point_cloud_dataset);

           intensities : LIST[1:?] OF REAL;
WHERE

           WR1: SIZEOF(intensities) = SIZEOF(SELF\point_cloud_dataset.point_coordinates);

         
         END_ENTITY;


ENTITY point_cloud_superdataset

           SUBTYPE OF (scanned_data_item);

           pts_per_sublist : INTEGER;

           sublists : LIST[2:?] OF point_cloud_dataset;
WHERE

           WR1: consistent_sizes(SELF.pts_per_sublist, SELF.sublists);

         
         END_ENTITY;


ENTITY triangulated_point_cloud_dataset

           SUBTYPE OF (scanned_data_item);

           points : point_cloud_set_or_superset;

           triangles : LIST[1:?] OF LIST[3:3] OF INTEGER;

         
         END_ENTITY;


ENTITY scan_3d_model

           SUBTYPE OF (scanned_data_item);

           scanner_info : SET[1:?] OF scanner_property;

           scanned_points : SET[1:?] OF scanned_data_item;
WHERE

           WR1: SIZEOF(QUERY(tmp <* scanned_points | 'SCAN_DATA_3D_SHAPE_MODEL_SCHEMA.SCAN_3D_MODEL' IN TYPEOF(tmp))) = 0;

         
         END_ENTITY;


ENTITY scanner_property

           ABSTRACT SUPERTYPE
         

           SUBTYPE OF (representation_item);

         
         END_ENTITY;


ENTITY scanner_basic_properties

           SUBTYPE OF (scanner_property);

           scanner_identification : label;

           scanner_location : axis2_placement_3d;

           scanner_uncertainty : 
         OPTIONAL 
         positive_length_measure;

         
         END_ENTITY;


FUNCTION consistent_sizes
 (max : INTEGER; point_lists : LIST OF point_cloud_dataset) : BOOLEAN;

  LOCAL
  ndatasets : INTEGER := SIZEOF(point_lists);
  result : BOOLEAN := TRUE;
    END_LOCAL;
      REPEAT i := 1 TO (ndatasets - 1);
    IF (SIZEOF(point_lists[i].point_coordinates) <> max)
    THEN
      result := FALSE;
      RETURN(result);
    END_IF;
  END_REPEAT;
      IF (SIZEOF(point_lists[ndatasets].point_coordinates) > max)
  THEN
    result := FALSE;
    RETURN(result);
  END_IF;
      RETURN(result);


         END_FUNCTION;



         END_SCHEMA;  -- scan_data_3d_shape_model_schema