.x bounding box

funxer · Post by **funxer** » Mon Jan 29, 2007 9:50 pm

Hi, I'm still trying to get a handle of this collision detection exercise.

I've replaced the 3 fairies in the example with just one "prop" that i exported from Maya into a .x format. And I was hoping for the same behavior that I was getting with the Fairies...
ie: The Prop should be dark when it's not being detected and Lit up when it IS detected. Yet it stays dark regardless, why is this not working...The Fairies work fine.

Please look at my .exe and code here: http://www.3drobert.com/cgtalk/CollisionTESTS.zip

Code: Select all


   // 
   // 
   //Add Prop 
   material.Texture1 = driver->getTexture("../../media/JanaCASTLEtex.png"); 
   material.Lighting = true; 

   scene::IAnimatedMeshSceneNode* propNode = 0; 
   scene::IAnimatedMesh* Prop = smgr->getMesh("../../media/prop.x"); 

   if (Prop) 
   { 
      propNode = smgr->addAnimatedMeshSceneNode(Prop); 
      propNode->getMaterial(0) = material; 
   } 

   material.Texture1 = 0; 
   material.Lighting = false;

Code: Select all


      selectedSceneNode = smgr->getSceneCollisionManager()->getSceneNodeFromCameraBB(camera); 

      if (lastSelectedSceneNode) 
         lastSelectedSceneNode->setMaterialFlag(video::EMF_LIGHTING, true); 

      if (selectedSceneNode == floorNode  || selectedSceneNode == bill) 
         selectedSceneNode = 0; 

      if (selectedSceneNode == propNode) 
         selectedSceneNode->setMaterialFlag(video::EMF_LIGHTING, false); 

      lastSelectedSceneNode = selectedSceneNode;

Acki · Post by **Acki** » Mon Jan 29, 2007 10:47 pm

The problem is with the mesh !!!
I don't know what's wrong with it, but it's bounding box has only a Y dimension (X and Z = 0) !!!
I loaded it again with MilkShape and saved it again as DX8, and the new mesh works !!!
Try the new mesh: http://abusoft.g0dsoft.com/prop.zip

funxer · Post by **funxer** » Mon Jan 29, 2007 11:39 pm

Yes!!!

It works, I was convinced that it was a problem with the bounding box, yet I thought it was with the code, not the Mesh...

...I tried to keep the test real simple to eliminate human error.

Now I can move on, Thanks

funxer · Post by **funxer** » Tue Jan 30, 2007 12:07 am

1 more thing...

do you know what line in the .x file represents the bounding box? I'm examining the 2 different files and the only differences that I'm seeing are with the :

FrameTransformMatrix {

and

VertexDuplicationIndices {

thanx again

Acki · Post by **Acki** » Tue Jan 30, 2007 1:12 am

The BB is created by Irrlicht while it loads the mesh...
I really don't know why your mesh doesn't have a correct BB ???

hybrid · Post by **hybrid** » Tue Jan 30, 2007 9:21 am

There are some bug reports on bboxes for .x. It seems that sometimes there's an element in the file which leads to a reset of the bbox without proper rebuild of the whole bbox. I'll check the example to see if I find anything useful.
Meanwhile I move this thread to the bug forum since it seems to be a bug in the loader (at least it could try to do better...).