2009

Length (Stiff Springs only) The distance that reactor should maintain between
the constraint attachment points.
Set Sets Length to the current distance between the attachment points.
Breakable group
Breakable When on, the constraint is breakable. If its breakable limits are
exceeded during simulation, it ceases to exert impulses on the attached objects.
You can find out more about breakable constraints in
Breakable Constraints
on page 3944.
Display group
Size Lets you change the size of the constraint limit display in the viewport.
Reset Default Values Returns the constraint's parameters to their default
values.
Prismatic Constraint
Create panel > Helpers > reactor > Prismatic
Animation menu > reactor > Create Object > Prismatic Constraint
reactor toolbar > Create Prismatic Constraint button
The Prismatic constraint serves as a constraint between two rigid bodies, or a
rigid body and the world, that allows its bodies to move relative to each other
along one axis only. Rotations, as well as the remaining two translation axes,
are fixed. For example, you could use a Prismatic constraint when creating a
forklift truck.
A Prismatic constraint is simulated if it has the correct number of rigid bodies
attached and is included in a valid
Constraint Solver on page 3945. When not
selected, an invalid prismatic constraint is red in the viewport.
Procedures
To create a Prismatic constraint:
■ Choose one of the above options, and then click in any viewport to add
the Prismatic constraint.
3982 | Chapter 16 reactor