Vista - 3D Animation

When I try to animate the property of a ModelVisual3D I get
"Multi-step property paths may not be specified on an
object of type 'System.Windows.Media.Media3D.ModelVisual3D'"

And this happens with GeometryModel3D too.

Is this by design or is it a bug?

The only way to avoid that is to go up on the tree and use the viewport as
the target for the animation. The problem is when ModelVisual3D contains
other ModelVisual3Ds in its Children property - because there is no
dependency property (ChildrenProperty) I cannot build the path.

Thank you,
Valentin Iliescu

I also found this problem was rampant when I tried to port a rather
famous chess program from an earlier CTP to the Nov CTP. Could not get
long property paths to work, and I re-engineered the animation in the
chess program to start at lower-level objects so the property-paths
would be shorter. That strategy worked, and I'd be glad to send the
code to you (of course!), but I do not understand what "broke". I now
use that strategy in all my applications and avoid long proppaths as
much as possible!

Thank you,

Using your suggestion I have solved the problem. Just curious, what objects
did you use as your animation target? Only property paths with just one level
worked for me (any loger it would complaind about "multi-step ...") so I had
to target the the Brush (for opacity animation) and Transform3D (for position
animation).

Valentin

"David Sklar" wrote:

> I also found this problem was rampant when I tried to port a rather
> famous chess program from an earlier CTP to the Nov CTP. Could not get
> long property paths to work, and I re-engineered the animation in the
> chess program to start at lower-level objects so the property-paths
> would be shorter. That strategy worked, and I'd be glad to send the
> code to you (of course!), but I do not understand what "broke". I now
> use that strategy in all my applications and avoid long proppaths as
> much as possible!
>
>