
The material resulting from an intersection
operation between two bodies is the material shared by these bodies. This
tasks illustrates how to compute two intersections via a Boolean operation.
When working in a CATProduct document, it is not necessary to copy and
paste the bodies belonging to distinct parts before associating them. You
can directly associate these bodies using the same steps as described in
this task.
Structuring Your Design
Generally speaking, using Boolean Operations is a good way
of structuring your part. Prior to designing, you can actually define the
part's structure by associating a body containing geometry with empty
bodies. Once these specifications are done, you can then concentrate on the
geometry.
In this page, you will find the following information:

Bodies You Can Use

Performing a Boolean
operation using set of bodies (multiselected via the Ctrl key) is
possible unless the bodies are located in ordered geometrical sets.
This capability will increase your productivity.
 Making a body intersect with a
solid body and vice versa is
possible. In that case, the second body you select remains at the same
location in the specification tree once the Boolean operation is done.
For reference information, refer to
Mixed Boolean Operations.

From
V5R16 onward, you can make a body set in an ordered geometrical set (OGS)
intersect with another body set in the same ordered geometrical set or in
a distinct one. Note that the different Boolean operations can be
performed using dedicated contextual commands.
Depending on whether the Boolean operation interrupts the sequential
construction of the geometry or not, the application behaves differently.
No interruption of the sequential construction
of the geometry
If there is no interruption of the
sequential construction of the geometry, two cases are to be considered:
 if the bodies are set in the same OGS, the operation is
performed and the second body selected is located below the Boolean
operation node.

 if the bodies are set in distinct OGS, the operation is
performed and the second body selected is moved below the Boolean
operation node.

Interruption of the sequential construction of
the geometry
If there is an interruption of the
sequential construction of the geometry, two cases are to be considered:
 if the bodies are set in the same OGS, a warning message is
issued informing you that the operation is going to be canceled: breaking
the sequential construction of the geometry is not allowed when the
operands belong the the same OGS.
 if the bodies are set in distinct OGS, a warning message
is issued letting you choose between canceling the operation or going on.
If you decide to continue, the second body you selected remains at its
initial location in the tree.
Location of Bodies Once the
Boolean Operation is Complete
Once a Boolean operation is done, the second body you
selected is moved below the Boolean operation, as illustrated in the
scenario above. However, there are exceptions to that rule:

Making a body and a
solid body intersect and vice versa is possible. In that case, the
second body you select remains at the same location in the specification
tree once the Boolean operation is done. To see an example, refer to
Mixed Boolean Operations.

If intersecting bodies results in an interruption of the
sequential construction of the geometry, the second body you selected to
perform the Boolean operation remains at its initial location in the tree
when the operation is complete. To see an example, refer to the
Location of Bodies Once the Boolean
Operation is Complete paragraph of Assembling Bodies.
Notes

You cannot reapply the
Assemble, Add,
Trim,
Intersect, Remove and
Remove Lump commands to bodies already
associated to other bodies. However, if you copy and paste the result of
such operations elsewhere in the tree you can then use these commands.

Avoid using input elements that are tangent to each other
since this may result in geometric instabilities in the tangency zone.
Optimizing Your Design
The Only Current Body option
displays only the features of the current body and greatly improves the
application performance whenever you edit these features. For more
information, refer to
Display in Geometry Area.
Interrupting Boolean Operations
Computations
In case you made a mistake when performing a Boolean operation, you can
interrupt the feature computation launched after clicking OK,
when the computation requires a few seconds to perform.
In concrete terms, if the computation exceeds a certain amount of time, a
window appears providing a Cancel option. To interrupt the
operation, just click that Cancel button. This interrupts the
process and then displays an Update Diagnosis dialog box enabling you to
edit, deactivate, isolate or even delete the Boolean operation in progress.
This capability is available for any types of Boolean operations you are
creating or editing.
Colors
When performing a
mixed Boolean operation, the resulting geometry inherits the color of
the first geometric entity selected. 