Geometry Representation Arrays

Use the following methods to access the arrays in the internal representation of COMSOL Multiphysics geometry objects. They do not work on objects represented using the CAD kernel, assembly geometries, or virtual geometries.

Table 3-24: get Arrays in Geometry Representation

method	1D	2d	3d	output type	3.5a name
getVertex()	√	√	√	double[][]	vertex
getEdge()		√	√	double[][]	edge
getFace()			√	double[][]	face
getPVertex()			√	double[][]	pvertex
getPEdge()			√	double[][]	pedge
getVertexCoord()	√	√	√	double[][]	mp, flgeomvtx
voidsAreLabeled()	√	√	√	Boolean

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In 2D and 3D, getVertex returns (sdim+2)-by-nv matrix representing the vertices of the object. The first sdim rows are the coordinates of the vertices. Row sdim+1 contains the domain number if the vertex is isolated and is unspecified otherwise. The last row contains a relative local tolerance for the vertex. For nontolerant vertices the tolerance is NaN. This method does not work on virtual geometry objects.

•	In 1D, getVertex returns a 3-by-nvtx matrix representing the vertices of the 1D object. Row 1 provides the coordinates of the vertices. Rows 2 and 3 provide the up and down domain numbers, respectively.

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getPVertex returns a 6-by-npv matrix containing embeddings of vertices in faces. Row 1 contains the vertex index (that is, column from getVertex), rows 2 and 3 contain (s, t) coordinates of the vertex on the face, row 4 contains a face index, and row 5 contains the manifold index into the manifolds. Row 6 contains a relative local tolerance for the vertex. This method does not work on virtual geometry objects.

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In 3D, getEdge returns a 7-by-ne matrix representing the edges of the 3D object. Rows 1 and 2 contain the start and end vertex indices of the edge (0 if they do not exist), respectively. Rows 3 and 4 give the parameter values of these vertices. Row 5 gives the index of a domain if the edge is not adjacent to a face, and is unspecified otherwise. Row 6 gives a sign and an index to the underlying manifold. The sign indicates the direction of the edge relative the curve. Finally, row 7 contains a relative local tolerance for the edge. This method does not work on virtual geometry objects.

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In 2D, getEdge returns a 8-by-ne matrix representing the edges of the 2D object. Rows 1 and 2 contain the start and end vertex indices of the edge, respectively (0 if they do not exist). Rows 3 and 4 give the parameter values of these vertices. Rows 5 and 6 contain the left and right domain number of the edge, respectively. Row 7 gives a sign and an index to the array of underlying curves. The sign indicates the direction of the edge relative the curve. Row 8 contains a relative local tolerance for the edge.

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getPEdge returns a 10-by-npe matrix representing the embeddings of the edges in faces. The first row gives the index of the edge in getEdge. Rows 2 and 3 contain the start and end vertex indices from getPVertex, respectively. Rows 4 and 5 give the parameter values of these vertices. Row 6 and 7 give the indices of the faces to the left and right of the edge, respectively. Row 8 gives a sign and index to the parameter curve (if any), and row 9 gives the index to the surface. Row 10 contains a relative local tolerance for the edge. This method does not work on virtual geometry objects.

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getFace returns a 4-by-nf matrix representing the faces of the 3D geometry. Rows 1 and 2 contain the up and down domain index of the face, respectively, and row 3 contains the manifold index of the face. Row 4 contains a relative local tolerance for the face. This method does not work on virtual geometry objects.

•	getVertexCoord returns a matrix with the vertex coordinates. Its dimension is the space dimension times the number of vertices.