Rendering Thread & 3d animation

Hello,
has anybody tried to animate objects (actually I'm trying to animate objects
in 3d viewport) WITHOUT using the WPF animation system?

I can't use the animation system because I'm trying to represents the
evolution of a dynamic simulation. In the past, with GL or DirectX I was able
to call a Render, says each hundred loops of simulation. But now I seem to be
stuck with the WPF rendering system where I can't force the render wich is,
from what I understood running in its own thread...

I've made some tries with VisualTarget.Rendering event but it's called only
when the rendering has been done and I've no way to force this rendering so
it seems to be useless in my case...

Is there any way to force the rendering based on a state inside the client
Application?

Thanks,

Lois

The CompositionTarget.Rendering event is probably what you're looking for...

Florian

Hi Lois,

I know that Kevin Moore coded a Panel that uses the Rendering event
to "animate" the position of the Panel items...

This is availlable in the "Bag'O'Tricks" he generated... You can
find it in his blog!!!

http://blogs.msdn.com/okoboji/archiv...14/631433.aspx

Hope this will help you!

Lois Lacroux wrote:
> Hello,
> has anybody tried to animate objects (actually I'm trying to animate objects
> in 3d viewport) WITHOUT using the WPF animation system?
>
> I can't use the animation system because I'm trying to represents the
> evolution of a dynamic simulation. In the past, with GL or DirectX I was able
> to call a Render, says each hundred loops of simulation. But now I seem to be
> stuck with the WPF rendering system where I can't force the render wich is,
> from what I understood running in its own thread...
>
> I've made some tries with VisualTarget.Rendering event but it's called only
> when the rendering has been done and I've no way to force this rendering so
> it seems to be useless in my case...
>
> Is there any way to force the rendering based on a state inside the client
> Application?
>
> Thanks,
>
> Lois

There are a couple of other options, each with its limitation:

1) Use CompositionTarget.Rendering: this gives you a callback before each
frame is rendered. The drawback is this will be called at maximum
framerate. You can choose to ignore renders if you don't need to change any
objects.

2) Use RenderTargetBitmap, and render a Visual tree to that bitmap. The
drawback is this is software only, so it may not be very performant for 3D
objects.

3) Create your own object that derives from UIElement, and call
InvalidateVisual() whenever you want a render to occur. This will
eventually call OnRender() for the appropriate elements on your Visual tree.
This would also have the benefit of only invalidating portions of the tree
that have changed.

Hope this helps.

Thanks,
Ed Maia
[WPF PM]

"Marcus" <larochem@gmail.com> wrote in message
news:1152191194.182115.72670@j8g2000cwa.googlegroups.com...
> Hi Lois,
>
> I know that Kevin Moore coded a Panel that uses the Rendering event
> to "animate" the position of the Panel items...
>
> This is availlable in the "Bag'O'Tricks" he generated... You can
> find it in his blog!!!
>
> http://blogs.msdn.com/okoboji/archiv...14/631433.aspx
>
> Hope this will help you!
>
> Lois Lacroux wrote:
>> Hello,
>> has anybody tried to animate objects (actually I'm trying to animate
>> objects
>> in 3d viewport) WITHOUT using the WPF animation system?
>>
>> I can't use the animation system because I'm trying to represents the
>> evolution of a dynamic simulation. In the past, with GL or DirectX I was
>> able
>> to call a Render, says each hundred loops of simulation. But now I seem
>> to be
>> stuck with the WPF rendering system where I can't force the render wich
>> is,
>> from what I understood running in its own thread...
>>
>> I've made some tries with VisualTarget.Rendering event but it's called
>> only
>> when the rendering has been done and I've no way to force this rendering
>> so
>> it seems to be useless in my case...
>>
>> Is there any way to force the rendering based on a state inside the
>> client
>> Application?
>>
>> Thanks,
>>
>> Lois
>

I have a sample that does 3D z-ordering using the VisualTarget.Rendering at
http://www.therhogue.com/WinFX - it's the collageview sample.

It looks like Ed, gave you some other options too.

"Lois Lacroux" wrote:

> Hello,
> has anybody tried to animate objects (actually I'm trying to animate objects
> in 3d viewport) WITHOUT using the WPF animation system?
>
> I can't use the animation system because I'm trying to represents the
> evolution of a dynamic simulation. In the past, with GL or DirectX I was able
> to call a Render, says each hundred loops of simulation. But now I seem to be
> stuck with the WPF rendering system where I can't force the render wich is,
> from what I understood running in its own thread...
>
> I've made some tries with VisualTarget.Rendering event but it's called only
> when the rendering has been done and I've no way to force this rendering so
> it seems to be useless in my case...
>
> Is there any way to force the rendering based on a state inside the client
> Application?
>
> Thanks,
>
> Lois
>
>