Reconstruct a geometry from STL or mesh data:
Import an STL file into MATLAB® by using importGeometry. The
STL file format is very common and supported by most CAD
software. In case of a planar STL geometry, the toolbox converts
it to a 2-D geometry by mapping it to the X-Y plane.
Reconstruct a geometry from a mesh by using geometryFromMesh.
This function works with triangulated meshes, including planar,
volume, and surface triangulation that bounds a closed
volume.
Create a geometry:
Stack or nest cubes, cylinders, or spheres to create a geometry for a 3-D problem.
Extrude a 2-D geometry into a 3-D geometry.
Use the constructive solid geometry (CSG) approach, write a
geometry function, or use the polyshape
function to create a geometry for a 2-D problem. The CSG
approach uses a set of solid building blocks (square, rectangle,
circle, ellipse, and polygon) and combines them to define
complex geometries.
Use the PDE Modeler app to create complex 2-D geometries by drawing, overlapping, and rotating basic shapes, such as circles, polygons and so on.
Mesh a geometry by using the generateMesh function. The
toolbox uses the finite element method (FEM) to solve PDEs. A PDE model
stores the generated mesh as an FEMesh object in its
Mesh property. For details, see Mesh Data.
| AnalyticGeometry Properties | Analytic 2-D geometry description |
| DiscreteGeometry Properties | Discrete 2-D or 3-D geometry description |
| FEMesh Properties | Mesh object |
| PDE Modeler | Create complex 2-D geometries by drawing, overlapping, and rotating basic shapes |
Include a geometry into your PDE model by importing an STL file.
Geometry from Triangulated Mesh
Reconstruct a geometry from a tetrahedral mesh and from a planar multidomain mesh.
Reconstruct a geometry from a triangulated mesh created by the MATLAB
polyshape function.
Reconstruct a geometry from a triangulated surface mesh created by the MATLAB
alphaShape function.
2-D Geometry Creation at Command Line
Use constructive solid geometry (CSG) modeling approach to combine basic shapes at the command line.
Parametrized Function for 2-D Geometry Creation
Create a 2-D geometry by using a parametrized function.
Cuboids, Cylinders, and Spheres
Create a 3-D geometry by stacking or nesting three basic volumes.
3-D Multidomain Geometry from 2-D Geometry
Extrude a 2-D geometry imported as an STL file into a 3-D geometry.
Multidomain Geometry Reconstructed from Mesh
Split a single-domain block geometry into two domains.
Create a nested multidomain geometry consisting of a unit sphere and a cube.
Adjust a mesh by using additional arguments of the generateMesh function.
Find Mesh Elements and Nodes by Location
Find mesh elements and nodes by their geometric location or proximity to a particular point or node.
Assess Quality of Mesh Elements
Evaluate the shape quality of mesh elements.
Recommended workflow uses FEMesh objects to represent
meshes.
Legacy workflow uses [p,e,t] triples to represent meshes.