select_points_object_model_3dT_select_points_object_model_3dSelectPointsObjectModel3dSelectPointsObjectModel3d (Operator)

Name

select_points_object_model_3dT_select_points_object_model_3dSelectPointsObjectModel3dSelectPointsObjectModel3d — Apply a threshold to an attribute of 3D object models.

Signature

Description

select_points_object_model_3dselect_points_object_model_3dSelectPointsObjectModel3dSelectPointsObjectModel3dSelectPointsObjectModel3d selects points of the 3D object model ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D according to the attributes and thresholds passed in AttribAttribAttribAttribattrib, MinValueMinValueMinValueMinValueminValue, and MaxValueMaxValueMaxValueMaxValuemaxValue respectively. The selected points are returned in the 3D object model ObjectModel3DThresholdedObjectModel3DThresholdedObjectModel3DThresholdedObjectModel3DThresholdedobjectModel3DThresholded. All attributes that are connected with the points (e.g., polygons or triangles) are adapted in such a way that there is no reference to the removed points left.

AttribAttribAttribAttribattrib can either contain a tuple of numbers that has the same length as ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D has points, or a list of attribute names on which the thresholds are applied.

If AttribAttribAttribAttribattrib contains a tuple of numbers, exactly one number must be passed in both MinValueMinValueMinValueMinValueminValue and MaxValueMaxValueMaxValueMaxValuemaxValue. All points for which the corresponding entry in AttribAttribAttribAttribattrib is between the two thresholds are added to the output 3D object model ObjectModel3DThresholdedObjectModel3DThresholdedObjectModel3DThresholdedObjectModel3DThresholdedobjectModel3DThresholded.

Otherwise, AttribAttribAttribAttribattrib can contain a list of attribute names that refer to properties of the 3D object model ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D. All points, for which the value stored in the attribute AttribAttribAttribAttribattrib is inside the interval specified in MinValueMinValueMinValueMinValueminValue and MaxValueMaxValueMaxValueMaxValuemaxValue are stored in the output 3D object model. MinValueMinValueMinValueMinValueminValue and MaxValueMaxValueMaxValueMaxValuemaxValue must contain exactly as many values as AttribAttribAttribAttribattrib. If AttribAttribAttribAttribattrib contains multiple values, only those points are stored in the output 3D object model that fulfill all the criteria.

Depending on the properties of ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D, the following values are possible for AttribAttribAttribAttribattrib:

The following attributes are available:

'point_coord_x'"point_coord_x""point_coord_x""point_coord_x""point_coord_x":

The x-coordinates of the set of 3D points.

'point_coord_y'"point_coord_y""point_coord_y""point_coord_y""point_coord_y":

The y-coordinates of the set of 3D points.

'point_coord_z'"point_coord_z""point_coord_z""point_coord_z""point_coord_z":

The z-coordinates of the set of 3D points.

'point_normal_x'"point_normal_x""point_normal_x""point_normal_x""point_normal_x":

The x-components of the 3D point normals of the set of 3D points.

'point_normal_y'"point_normal_y""point_normal_y""point_normal_y""point_normal_y":

The y-components of the 3D point normals of the set of 3D points.

'point_normal_z'"point_normal_z""point_normal_z""point_normal_z""point_normal_z":

The z-components of the 3D point normals of the set of 3D points.

'mapping_row'"mapping_row""mapping_row""mapping_row""mapping_row":

The row-components of the 2D mapping of the set of 3D points.

'mapping_col'"mapping_col""mapping_col""mapping_col""mapping_col":

The column-components of the 2D mapping of the set of 3D points.

'neighbor_distance'"neighbor_distance""neighbor_distance""neighbor_distance""neighbor_distance":

'neighbor_distance N'"neighbor_distance N""neighbor_distance N""neighbor_distance N""neighbor_distance N":

The distance of the N-th nearest point. N must be a positive integer and is by default 25. For every point, all other points are sorted according to their distance and the distance of the N-th point is used.

'num_neighbors X'"num_neighbors X""num_neighbors X""num_neighbors X""num_neighbors X":

The number of neighbors within a distance of at most X. It can be used to remove sparsely populated parts of the 3D object model, such as outliers or points that are created by smoothing between 3D surfaces.

'num_neighbors_fast X'"num_neighbors_fast X""num_neighbors_fast X""num_neighbors_fast X""num_neighbors_fast X":

The approximate number of neighbors within a distance of at most X. The distances are approximated using voxels, leading to a faster processing compared to 'num_neighbors'"num_neighbors""num_neighbors""num_neighbors""num_neighbors".

Extended attribute:

Enter the name of an extended attribute of the type 'vertices'"vertices""vertices""vertices""vertices" and the selection will be applied based on the values of the extended attribute.

Execution Information

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Automatically parallelized on internal data level.

Parameters

Example (HDevelop)

gen_object_model_3d_from_points (rand(100), rand(100),\
                                    rand(100), ObjectModel3D)
select_points_object_model_3d (ObjectModel3D, 'point_coord_z',\
                               0.5, 1, ObjectModel3DThresholded)
get_object_model_3d_params (ObjectModel3DThresholded, 'num_points',\
                            NumPoints)

Result

select_points_object_model_3dselect_points_object_model_3dSelectPointsObjectModel3dSelectPointsObjectModel3dSelectPointsObjectModel3d returns 2 (H_MSG_TRUE) if all parameters are correct. If necessary, an exception is raised. If the required points are missing in the object model, i.e., an empty object model is passed, the error 9515 is raised.

Possible Predecessors

read_object_model_3dread_object_model_3dReadObjectModel3dReadObjectModel3dReadObjectModel3d, xyz_to_object_model_3dxyz_to_object_model_3dXyzToObjectModel3dXyzToObjectModel3dXyzToObjectModel3d

Possible Successors

connection_object_model_3dconnection_object_model_3dConnectionObjectModel3dConnectionObjectModel3dConnectionObjectModel3d, project_object_model_3dproject_object_model_3dProjectObjectModel3dProjectObjectModel3dProjectObjectModel3d, object_model_3d_to_xyzobject_model_3d_to_xyzObjectModel3dToXyzObjectModel3dToXyzObjectModel3dToXyz

See also

connection_object_model_3dconnection_object_model_3dConnectionObjectModel3dConnectionObjectModel3dConnectionObjectModel3d, reduce_object_model_3d_by_viewreduce_object_model_3d_by_viewReduceObjectModel3dByViewReduceObjectModel3dByViewReduceObjectModel3dByView

Module

3D Metrology