AnalyticGeometry

Analytic 2-D geometry description

Description

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

Creation

Add a 2-D analytic geometry to your model by using decsg to create the geometry and geometryFromEdges to attach it to the model.

Properties

NumFaces — Number of geometry faces

positive integer

Number of geometry faces, specified as a positive integer. If your geometry is one connected region, then NumFaces = 1.

Data Types: double

NumEdges — Number of geometry edges

positive integer

Number of geometry edges, specified as a positive integer.

Data Types: double

NumVertices — Number of geometry vertices

positive integer

Number of geometry vertices, specified as a positive integer.

Data Types: double

Vertices — Coordinates of geometry vertices

N-by-2 numeric matrix

Coordinates of geometry vertices, specified as an N-by-2 numeric matrix where N is the number of vertices.

Data Types: double

Object Functions

addFace	Fill void regions in 2-D and split cells in 3-D geometry
extrude	Vertically extrude 2-D geometry or specified faces of 3-D geometry
faceEdges	Find edges belonging to specified faces
facesAttachedToEdges	Find faces attached to specified edges
nearestEdge	Find edges nearest to specified point
nearestFace	Find faces nearest to specified point
rotate	Rotate geometry
scale	Scale geometry
translate	Translate geometry

Examples

Rectangle from Decomposed Solid Geometry

Create a decomposed solid geometry model representing a rectangle and include it in a PDE model.

Create a default scalar PDE model.

model = createpde;

Define a geometry representing a rectangle.

R1 = [3,4,-1,1,1,-1,0.5,0.5,-0.75,-0.75]';

Decompose the geometry into minimal regions.

g = decsg(R1);

Create the geometry from the decomposed geometry matrix.

geometryFromEdges(model,g);

Plot the geometry.

pdegplot(model,EdgeLabels="on")
axis equal
xlim([-1.1,1.1])
ylim([-0.9,0.6])

Version History

Introduced in R2015a