2009

between the limits (–10+20 )*0.5=5. This results in the effective limits being
[–15,15] rotated by 5 degrees, thus final limits of [–10, 20].
Cone Max The maximum value, in degrees, used to specify the limit cone.
This is combined with the Cone Min value to generate a symmetrical cone.
This cone is rotated about the plane normal by an offset calculated by
combining these limits. The rotation of the child’s twist axis is then limited
to being within this cone with respect to the parent.
Plane Min The angle between the plane and a reference line in the range
[-90,0]. This line is swept about the plane normal to create a cone. The child’s
twist axis is then restricted from entering this cone. If this cone intersects the
cone produced by the cone limits, it further inhibits the motion of the child
with respect to the parent.
Plane Max The angle between the plane and a reference line in the range
[0,90]. This line is swept about the plane normal to create a cone. The child’s
twist axis is then restricted from entering this cone. If this cone intersects the
cone produced by the cone limits, it further inhibits the motion of the child
with respect to the parent.
Breakable group
Breakable When on, the constraint is breakable. If its breakable limits are
exceeded during simulation it will cease to exert impulses on the attached
objects. You can find out more about breakable constraints in
Breakable
Constraints
on page 3944.
Display group
Show Twist When on, Twist limits display as part of the Parent Space
visualization. The representation is a cylinder section showing the restricted
motion of the attached object with respect to rotation about the twist axis.
Show Cone When on, the entire symmetrical cone produced by the Cone >
Min and Max limits displays as part of the Parent Space visualization.
Show Plane When on, representations of the plane and plane normal display
as part of the Parent Space visualization.
Show Plane Limits When on, the cones formed by the plane limits display
as part of the Parent Space visualization.
Show Volume If true, a representation of the allowed region of movement
based on a combination of the plane and cone values will be calculated and
displayed as part of the Parent Space visualization.
3958 | Chapter 16 reactor