Updating the Bounding Box

[LukeBitts]

Hi everyone. I have this 3D model which works as a tile in my game, I'm moving its vertices based on a height-map and it's working like a charm. Now I'm trying to pick the tiles individually using the triangle selector. That is also working, the problem is that when I change the mesh through the mesh buffer, the bounding box is not updated and the triangle selector only counts the previous bb. I did find an updatebb method, but not on the scene node or anywhere I could understand... how can I fix this?


Thanks (:

[CuteAlien]

The meshbuffer has a function called setDirty which should be called when the mesh has changed. I think that might help with the bounding-box.

[LukeBitts]

nop, I'm still getting the same error.

The moveVertex function:

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void moveVertex(IAnimatedMeshSceneNode* node, s32 index, f32 step) 
{ 		
	IMeshBuffer* meshBuffer = node->getMesh()->getMeshBuffer(0);
	S3DVertex* mb_vertices = (S3DVertex*)meshBuffer->getVertices();
	u16* mb_indices = meshBuffer->getIndices();
	mb_vertices[index].Pos.Y += -step;	
	meshBuffer->setDirty();
} 

[Klunk]

have you tried....

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meshBuffer->recalculateBoundingBox ();

[CuteAlien]

Hm, only bounding-box updates. I see right now no way to update the triangle selector for non-animated meshes. Strange... hm, which triangle selector are you using here?

[LukeBitts]

have you tried....

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meshBuffer->recalculateBoundingBox ();

That did update the bounding box, but only the pink one (from setDebugDataVisible(scene::EDS_BBOX_ALL); ), I'm guessing the selector uses the white one since the selection is still based on the old bounding box.

Hm, only bounding-box updates. I see right now no way to update the triangle selector for non-animated meshes. Strange... hm, which triangle selector are you using here?

Is this what you want?

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ITriangleSelector* selector = 0;
selector = device->getSceneManager()->createTriangleSelector(me.getTile());
me.getTile()->setTriangleSelector(selector);
IAnimatedMeshSceneNode* selectedSceneNode = (IAnimatedMeshSceneNode*)device->getSceneManager()->getSceneCollisionManager()->getSceneNodeFromScreenCoordinatesBB(device->getCursorControl()->getPosition()/*,IDFlag_IsPickable*/); 

This is what I mean by pink and white bounding boxes:


edit: hm, now that I see it, its also updating the white bounding box, but only to the model scale, not the new vertex position... is there a way to copy the meshbuffer bounding box to the node bounding box?

[LukeBitts]

yay I fixed

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note->getMesh()->getMeshBuffer(0)->recalculateBoundingBox();
core::aabbox3df box = node->getMesh()->getMeshBuffer(0)->getBoundingBox();
node->getMesh()->getMesh(0)->setBoundingBox(box);