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
Block
3D
Interval
1D
Circle
2D
Line Segment
2D, 3D
Circular Arc
2D
Parametric Curve
2D, 3D
Composite Curve
2D
Parametric Surface
3D
Cone
3D
Point
1D, 2D, 3D
Cubic Bézier
2D, 3D
Polygon
2D, 3D
Cylinder
3D
Pyramid
3D
Eccentric Cone
3D
Quadratic Bézier
2D, 3D
Ellipse
2D
Rectangle
2D
Ellipsoid
3D
Sphere
3D
Helix
3D
Square
2D
Hexahedron
3D
Tetrahedron
3D
Interpolation Curve
2D, 3D
Torus
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
.