TreeCollision serialization

I've just sent a CVS patch to use Newton's TreeCollision serialization from OgreNewt. It seems to make a huge performance boost when you need to create lots of static objects on the fly, I'm especially using it with PLSM2 at the moment and initializing a 64x64 terrain tile is roughly 50 times faster with serialization.

Code sample on the wiki.

hmmm... I wonder how I get patches.... I'm still very new to CVS.

thanks for adding this though, it was one of the few things missing!

[edit]
okay, I found the patch on sourceforge... I wonder how I merge it into ogrenewt CVS?? anyone know?[/edit]

You need a patch command line tool. For instance cygwin or the one from unxutils.sf.net.

On the cmd commandline(unxutils) or bash(cygwin) go to your ogreaddons/ogrenewt/OgreNewt_Main/ directory. and type

patch -p0 < patch.txt

The patch.txt from the patch.zip being in the same directory.

thank you haffax. I got it to work, and am checking it now. I will update CVS today with the changes. and thanks again MrCarbohydrate for the patch!!

Demo expected for its use?

not reall necessary, it's extremely simple to use. just create the collision once, serialize it to a file, and then just load the treecollision from the serialized file, and it's created MUCH faster.

Will have to examine, would certainly be more efficient then allload'ing a plsm2 terrain...

thank you haffax. I got it to work, and am checking it now. I will update CVS today with the changes. and thanks again MrCarbohydrate for the patch!!
If you applied it, it would be a good idea to log into sourceforge and add a message to the patch that it can be closed.

OK, will do!

Will have to examine, would certainly be more efficient then allload'ing a plsm2 terrain...
Did you check the wiki link I mentionned in the first post? There are code samples, it's very straightforward. And much more efficient than directly creating the collision from the PLSM2 geometry indeed!

Looked quickly earlier, have not yet added plsm2 to my project, that is my next goal after I finish a set of factory classes, will look closely then. Thank you.

Hello all!
I use PLSM2 and OgreNewt. Also I want to use serialization, because my app very slowly. I have 2 questions:
1) I read code in wiki (PLSM2 and OgreNewt) and make it, but I don't understand, where I must use serializarion code for save or recovery collizion for best performance.
2) this method fix problem for LOWEST FPS, when work line?:

OgreNewt::Collision* collision=new OgreNewt::CollisionPrimitives::TreeCollision(m_World,numVertices,vertices,indexData,false); (i this line my app "pausing")

I understand how to use serilization, but I have trouble - ALL objects collide with terrain and fall Through it. Why???

Perhaps a demo in the next version of OgreNewt showing how to serialize? I can make it if you want.

But yea, going with maxwave, I often have things go through the terrain, rather then impact on it as well, happens at the faster speeds so the problem is obvious, but is there a good way to help prevent it without turning on that one costly option (it is vehicles themselves that pass through)? I could turn on that option at the certain times it occurs, is it costly to turn it on/off rapidly (every few frames or so)?

I'm sorry, but your english hard for me. If I have understood, you want to make one option, which down FPS, but due to which the objects will not go trough. It you want to show in Demo?

And serialization don't have only one problem. When I press F3, that show collisions, app crash.

Same boat, using latest ogrenewt, PLSM and Newton i get a crash in newton.dll!0037635a when i press f3 to view the collision mesh using the serializer.

If it rebuild the data each time instead of serializing it works for a short while.

Any clues?