9

Angular Dashpot 733
attached and is enabled. When not selected,
invalid dashpots are colored red in the viewport.
Pr ocedur es
To create an Angular Dashpot:
• Chooseoneoftheaboveoptions,andthenclick
in any viewport to add the dashpot.
Note: The icon’s position has no effect on the
constraint’s behavior.
To atta ch objects to the A ngular Da shpot:
1.
Create the dashpot and the objects to connect
using it.
2. In the dashpot’s Properties rollout, click the
Child pick button and then select the objec t to
use as the child object in one of the viewports.
By default, this alig ns the A ngular Dashpot’s
target orientation with the child body’s local
space.
3. If you do not want to assign a second body to
the dashpot, turn off the Parent check box if
necessary.
4. If the dashpot is two-bodied, repeat Step 2,
usingtheParentpickbuttontosetParentfor
the angular dashpot.
To create th e co ns traint and attach o bjects in a si ng le
step:
•SeetheScripts (page 2–817) topic.
To change the offset rotations for the bodies:
1.
With the Angular Dashpot selected, open the
Modify panel.
2. In the modifier stack, open the dashpot’s
sub-object list.
3. Highlight the sub-object that corresponds
to the offset rotation you want to change:
Child Space or Parent Space. If the dashpot
is single-bodied, Parent Space represents the
world rotation that the dashpot works to align
theChildSpacewith.
4. The selected axis sub-object becomes active
in the viewports and can be rotated using
theRotatetool.Theaxismaintainsitsoffset
rotation so that if you rotate the object it’s
linked to, it a lso rotates.
5. To realign the rotation to the child body’s
local space, reattach the object to the dash pot.
Alternatively, click the Align Spaces To Child
Body button.
To ali gn the par ent and child constrai nt spa ces:
1.
Ensure that the constraint is selected in one of
the view ports.
2. In the Align Spaces To group, click the button
foryourchosenalignment.
You can find out more about the alignment
options in the Working With Constraint Spaces
(page 2–726) section.
Interfa ce
Modifier Stack
Child Space—At this sub-object level, you can select
and rotate the offset rotation for the child object.
This is the rotation that the angular dashpot tries
to maintain for the child body relative to the
parent. When you assign a child object to the
dashpot, reactor aligns Child Space to the child
body’s local space. If you alter the rotation of this
sub-object, it maintains its new rotation relat ive
to the child body.