DiscreteGeometry Properties

Discrete 2-D or 3-D geometry description

DiscreteGeometry describes a 2-D or 3-D geometry in the form of a discrete geometry object. PDEModel, StructuralModel, and ThermalModel objects have a Geometry property, which can be an AnalyticGeometry or DiscreteGeometry object.

Create a discrete geometry for your model by using one of the following approaches:

• Use importGeometry to import a 2-D or 3-D geometry from an STL file and attach it to the model.

• Use geometryFromMesh to reconstruct a 2-D or 3-D geometry from mesh and attach it to the model.

• Use multicuboid, multicylinder, or multisphere to create a 3-D geometry. Then assign the resulting geometry to the Geometry property of the model. For example, create a PDE model and add the following geometry formed by three spheres to the model.

  model = createpde;
  gm = multisphere([1,2,3]);
  model.Geometry = gm;

• Use extrude to create a 3-D geometry by vertically extruding a 2-D geometry.

Properties

NumCells — Number of geometry cells

nonnegative integer

Number of geometry cells, returned as a nonnegative integer.

Data Types: double

NumEdges — Number of geometry edges

nonnegative integer

Number of geometry edges, returned as a nonnegative integer.

Data Types: double

NumFaces — Number of geometry faces

positive integer

Number of geometry faces, returned as a positive integer.

Data Types: double

NumVertices — Number of geometry vertices

nonnegative integer

Number of geometry vertices, returned as a nonnegative integer.

Data Types: double

Vertices — Coordinates of geometry vertices

N-by-2 numeric matrix | N-by-3 numeric matrix

Coordinates of geometry vertices, specified as an N-by-2 or N-by-3 numeric matrix for a 2-D or 3-D geometry, respectively. Here, N is the number of vertices.

Data Types: double