Question about ITriangleSelector and animated models

Peter Müller · Post by **Peter Müller** » Thu Jul 08, 2004 3:14 pm

Hi there!
I've got an animated IAnimatedMeshSceneNode build upon an MD2 Model file (sydney.md2

).

My question:
Do I have to create a new ITriangleSelector every frame, to get the exact collision position?

Mindl · Post by **Mindl** » Fri Jul 09, 2004 2:20 am

I would think you only need to create the triangle selcetor for the model once and then use it to initialize a collision animator for the models IAnimatedMeshSceneNode. That should take care of the collision for that node every frame. Hope this helps.

-Mindl

thesmileman · Post by **thesmileman** » Fri Jul 09, 2004 5:51 pm

This is a very good question. I think that the triangle selector holds the triangles only but the collision response animator keeps trace of how the triangles are moved rotated or otherwise modified as in an animation.

I know this is the case for objects which are moved and rotated, as a while back I did a school project in which I moved and rotated an object and an object collided with the moved and rotated trinagles in various positions. Whether or not this is true for animated meshes I am not sure but I would imagine so. Just do a test and create an animated box that moves far from its position and try to collided something with it at various points in the animation.

Peter Müller · Post by **Peter Müller** » Fri Jul 09, 2004 9:08 pm

Hmm, I checked the Irrlicht source, but I don't find the feature. Perhaps I should ask Niko...

thesmileman · Post by **thesmileman** » Fri Jul 09, 2004 9:52 pm

What both mindl and I are saying is that we are pretty sure it works without you doing anything special. Have you tried it to make sure?

Peter Müller · Post by **Peter Müller** » Sat Jul 10, 2004 2:12 pm

Not jet, but I'll do it today and then report you.

niko · Post by **niko** » Mon Jul 12, 2004 6:15 pm

As far as I remember, I did not add something like that into the engine. But I think some time ago, someone posted an selector for this.

PeterM^LoggedOf · Post by **PeterM^LoggedOf** » Mon Jul 12, 2004 8:15 pm

Thanks for answering, niko.
I'll go and serach