Geometric Primitives
The geometric primitives provide building blocks of basic geometric shapes for creating geometries in 1D, 2D, and 3D. The features in
Table 7-3
are also available as buttons on
The Geometry Toolbar
, sometimes from the
More Primitives
(
3D,
2D, or
1D) menu. You can combine and operate on all geometric primitives using Boolean operations and other
Geometry Operations
.
Table 7-3:
1D, 2D, and 3D Geometry Primitives and Geometry Toolbar buttons
Button
Name
Space Dimension
Button
Name
Space Dimension
Bézier Polygon
2D, 3D
Interval
1D
Block
3D
Line Segment
2D, 3D
Circle
2D
Parametric Curve
2D, 3D
Circular Arc
2D
Parametric Surface
3D
Composite Curve
2D
Point
1D, 2D, 3D
Cone
3D
Polygon
2D, 3D
Cubic Bézier
2D, 3D
Pyramid
3D
Cylinder
3D
Quadratic Bézier
2D, 3D
Eccentric Cone
3D
Rectangle
2D
Ellipse
2D
Sphere
3D
Ellipsoid
3D
Square
2D
Helix
3D
Tetrahedron
3D
Hexahedron
3D
Torus
3D
Interpolation Curve
2D, 3D
If you want to refer to the domains, boundaries, edges, or points (geometric entities) in the Component, COMSOL Multiphysics can create selections for all geometric entities that a geometric primitive consists of. It is also possible to create selections in the geometry nodes for the resulting geometry objects from such operations. See
Creating Selections From Geometric Primitives and Operations
. For some geometric primitives (blocks and spheres, for example) you can add layers for creating, for example, sandwich structures or layers of concentric spheres. For many properties, press Ctrl+Space to access global parameters and built-in constants that you can use, for example, to define the dimensions of a geometric primitive. Also see
Part Libraries
for information about geometry models that can serve as specialized geometric primitives.
The
Selections of Resulting Entities
section in the settings for 2D geometry objects under a
Plane Geometry
node in a work plane is different from the section as described below. See
Plane Geometry
.