
This task shows you how to create an automatic
constructed geometry. 

 Creating an automatic constructed geometry allows you to create
associative wireframe geometry according to the context or represented
geometry.
 The lifecycle of an automatic constructed geometry is managed by the
application.
 To customize the constructed geometry options, see
Constructed Geometry.
 The constructed geometries are grouped under the Construction
geometries section in the Annotation Set section.


The following constructed geometry elements
are available:
 Point from:
 Sphere: the sphere center
 Cone: the cone vertex
 Torus: the torus center
 Circle: the circle center
 Intersection of a plane and a line: the intersection
must exist.
 Axis from:
 Cylinder: the cylinder axis
 Cone, a torus or a revolution surface: the revolution
axis
 Intersection of two planes: the intersection must exist.
 Curve from:
 Plane from:
 Cone: from the cone vertex to the infinite
 Torus: the plane normal to its axis passing through its
center
 Angular plane from:
 One plane and one line: plane and line must be parallel.
 Median plane from:
 Two planes: planes must be parallel.
 Passing plane from:
 Two planes: planes must be coplanar
 One plane and one line: line must be on the plane
 One plane and one point: point must be on the plane
 Two lines: lines must be parallel or intersecting
 One line and one point: point must not be on the line
 Three points.
 Thread from:
 Circling cylinder from:
 Three lines (or axes) at least and passing through these
ones: lines (or axes) must be parallel and a solution must
exist.
 Reference cylinder from:
 A line (or an axis) to define its reference cylinder
axis, and passing through one or more lines (or axes) to
define its radius: selected lines (or axes) must be parallel
and a solution must exist.


Open the
Annotations_Part_08.CATPart document:



Click Constructed Geometry Creation
in
the
Geometry for 3D
Annotations toolbar.

Select the surface as shown.

The Constructed Geometry Creation dialog box appears. 




Doubleclicking any automatically constructed
geometry displays this dialog box. 


Check Axis and Plane as geometries
to be generated and click OK in the dialog box.
The axis and the plane are created in the geometry. See also
Constructed Geometry options for graphic properties and limits. 

In the specification tree, Cone Axis.1 and Gage
Plane.2 representing the created axis and plane geometries are
added to the Construction geometries section. 


Click OK.

Click the Constructed Geometry Management
icon:

Select the surface as shown.

The Constructed Geometry Management dialog box appears
and displays the two created geometries and their creation mode, where
User Surface.8 and User Surface.9 are
representing geometry elements of the axis and the plane respectively. 


Click OK.
