In this short tutorial I will explain how to create a newspaper held by two (virtual) hands and manipulated. I will do so using softimage xsi cloth simulator and I will demonstrate using cluster center animation to drive cloth objects.
Needless to say this
method applys on any paper/cloth like object you want to drive by nailing points
on its surface and animating these points position.
First create your model.
I used a simple grid:
The next step is to
create two clusters with center of the points held by the character’s hands.
Note that we create two different clusters. Use EDIT > Create Cluster With
Center.
To
illustrate:
Do so for the other side
as well (not shown)
Now we have two clusters
with centers. The centers has null objects we can manipulate
later:
In the next step, we
select the whole geometry and create a cloth from the
selection.
You can also apply the
cloth paper preset (or any other…):
Now lets create the nail
clusters. We do so by selecting the point clusters we created earlier
individually and apply a Local Cloth Cluster on them:
Toggle the Nail check
box to indicate the this is a nail point so when we move the center null, the
newspaper will move with it. But make sure you set the correct preset (paper for
me) on the cluster before toggling it:
That’s it… now you can
animate the center nulls. Only thing I encounted is that the simulation is not
automatically refreshed when animating the nulls, so what I did is changed the
iterations in the simulation after I animated the nulls, just to let the
simulator refresh.
Here is the final result
of what I did here: Capture.avi
(500kb~)
I hope this tutorial was
helpful.
Itay L. (xsinister from
www.xsibase.com)