ClassesClasses | | Operators

surface_normals_object_model_3dT_surface_normals_object_model_3dSurfaceNormalsObjectModel3dSurfaceNormalsObjectModel3d (Operator)

Name

surface_normals_object_model_3dT_surface_normals_object_model_3dSurfaceNormalsObjectModel3dSurfaceNormalsObjectModel3d — Calculate the 3D surface normals of a 3D object model.

Signature

surface_normals_object_model_3d( : : ObjectModel3D, Method, GenParamName, GenParamValue : ObjectModel3DNormals)

Herror T_surface_normals_object_model_3d(const Htuple ObjectModel3D, const Htuple Method, const Htuple GenParamName, const Htuple GenParamValue, Htuple* ObjectModel3DNormals)

void SurfaceNormalsObjectModel3d(const HTuple& ObjectModel3D, const HTuple& Method, const HTuple& GenParamName, const HTuple& GenParamValue, HTuple* ObjectModel3DNormals)

static HObjectModel3DArray HObjectModel3D::SurfaceNormalsObjectModel3d(const HObjectModel3DArray& ObjectModel3D, const HString& Method, const HTuple& GenParamName, const HTuple& GenParamValue)

HObjectModel3D HObjectModel3D::SurfaceNormalsObjectModel3d(const HString& Method, const HTuple& GenParamName, const HTuple& GenParamValue) const

HObjectModel3D HObjectModel3D::SurfaceNormalsObjectModel3d(const char* Method, const HTuple& GenParamName, const HTuple& GenParamValue) const

static void HOperatorSet.SurfaceNormalsObjectModel3d(HTuple objectModel3D, HTuple method, HTuple genParamName, HTuple genParamValue, out HTuple objectModel3DNormals)

static HObjectModel3D[] HObjectModel3D.SurfaceNormalsObjectModel3d(HObjectModel3D[] objectModel3D, string method, HTuple genParamName, HTuple genParamValue)

HObjectModel3D HObjectModel3D.SurfaceNormalsObjectModel3d(string method, HTuple genParamName, HTuple genParamValue)

Description

The operator surface_normals_object_model_3dsurface_normals_object_model_3dSurfaceNormalsObjectModel3dSurfaceNormalsObjectModel3dSurfaceNormalsObjectModel3d calculates the 3D surface normals for the object ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D using the method specified by MethodMethodMethodMethodmethod. The calculated normals are appended to the input object and the resulting object is returned in ObjectModel3DNormalsObjectModel3DNormalsObjectModel3DNormalsObjectModel3DNormalsobjectModel3DNormals.

For MethodMethodMethodMethodmethod 'mls'"mls""mls""mls""mls", the normals estimation method Moving Least Squares (MLS) is applied. The MLS method for normals estimation is essentially identical with the MLS method used by smooth_object_model_3dsmooth_object_model_3dSmoothObjectModel3dSmoothObjectModel3dSmoothObjectModel3d with the exception that in surface_normals_object_model_3dsurface_normals_object_model_3dSurfaceNormalsObjectModel3dSurfaceNormalsObjectModel3dSurfaceNormalsObjectModel3d the 3D points are not smoothed, i.e., the original 3D points of ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D remain unchanged. For more details on the MLS as well as a full list and descriptions of the supported MLS parameters refer to smooth_object_model_3dsmooth_object_model_3dSmoothObjectModel3dSmoothObjectModel3dSmoothObjectModel3d.

If the object ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D contains triangles, the MethodMethodMethodMethodmethod 'triangles'"triangles""triangles""triangles""triangles" can be used to obtain point normals from the normals of the triangles neighboring a point. The normals of the neighboring triangles are weighted according to the angle which the triangle encloses at the point.

If the object ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D contains a 2D mapping (for example a 3D object model that was created with xyz_to_object_model_3dxyz_to_object_model_3dXyzToObjectModel3dXyzToObjectModel3dXyzToObjectModel3d), the MethodMethodMethodMethodmethod 'xyz_mapping'"xyz_mapping""xyz_mapping""xyz_mapping""xyz_mapping" can be used to obtain point normals from the neighborhood of the points in the 2D mapping. In a 5x5 neighborhood of the points in the 2D mapping, a plane is fit through the corresponding 3D points. The normal of this plane then gets switched in a direction consistent with the 2D mapping, for example along the viewing direction of the sensor or in the opposite direction.

Note that for points where the normal vector cannot be estimated, it is set to the zero vector. This happens, for example, if the 3D object model contains an identical point more than 'mls_kNN'"mls_kNN""mls_kNN""mls_kNN""mls_kNN" times.

Note that if a 3D object model is no longer needed or should be overwritten, the memory has to be freed first by calling the operator clear_object_model_3dclear_object_model_3dClearObjectModel3dClearObjectModel3dClearObjectModel3d.

Execution Information

This operator supports cancelling timeouts.

Parameters

ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D (input_control)  object_model_3d(-array) HObjectModel3D, HTupleHTupleHtuple (integer) (IntPtr) (Hlong) (Hlong)

Handle of the 3D object model containing 3D point data.

MethodMethodMethodMethodmethod (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Normals calculation method.

Default value: 'mls' "mls" "mls" "mls" "mls"

List of values: 'mls'"mls""mls""mls""mls", 'triangles'"triangles""triangles""triangles""triangles", 'xyz_mapping'"xyz_mapping""xyz_mapping""xyz_mapping""xyz_mapping"

GenParamNameGenParamNameGenParamNameGenParamNamegenParamName (input_control)  attribute.name-array HTupleHTupleHtuple (string) (string) (HString) (char*)

Names of generic smoothing parameters.

Default value: []

List of values: 'mls_abs_sigma'"mls_abs_sigma""mls_abs_sigma""mls_abs_sigma""mls_abs_sigma", 'mls_force_inwards'"mls_force_inwards""mls_force_inwards""mls_force_inwards""mls_force_inwards", 'mls_kNN'"mls_kNN""mls_kNN""mls_kNN""mls_kNN", 'mls_order'"mls_order""mls_order""mls_order""mls_order", 'mls_relative_sigma'"mls_relative_sigma""mls_relative_sigma""mls_relative_sigma""mls_relative_sigma"

GenParamValueGenParamValueGenParamValueGenParamValuegenParamValue (input_control)  attribute.value-array HTupleHTupleHtuple (real / integer / string) (double / int / long / string) (double / Hlong / HString) (double / Hlong / char*)

Values of generic smoothing parameters.

Default value: []

Suggested values: 10, 20, 40, 60, 0.1, 0.5, 1.0, 2.0, 0, 1, 2, 'true'"true""true""true""true", 'false'"false""false""false""false"

ObjectModel3DNormalsObjectModel3DNormalsObjectModel3DNormalsObjectModel3DNormalsobjectModel3DNormals (output_control)  object_model_3d(-array) HObjectModel3D, HTupleHTupleHtuple (integer) (IntPtr) (Hlong) (Hlong)

Handle of the 3D object model with calculated 3D normals.

Alternatives

smooth_object_model_3dsmooth_object_model_3dSmoothObjectModel3dSmoothObjectModel3dSmoothObjectModel3d

Module

3D Metrology


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