Hey all! Quick question:- Is there a D3DX function to scale and normalize a mesh? I have looked in ID3DXBaseMesh and ID3XMESH in the SDK help but i cant see any functions that would do it. Do i have to do it myself? ie. clone the mesh -> find extreme vertex values -> change vertex info so extremes = 1 and rest is relative to this? Just point me in the right direction. Another question:- Also i want to make sure my mesh's are in a format i like so want them all to use FVF (fixed function) types i specify. After importing my mesh's (.x file from 3ds max) how would i go about converting them (if needed) to a format i want. It will involve ID3DXBaseMesh::GetFVFbut that is as far as i can figure. Again just point me to a helpful function or document and i will try to figure it out. Regards galapogos

Cool. Thats the second question answered. Normalising the mesh was due to the fact when i import them they are often incorrect in size. I need to scale and resize mesh's to suit my needs but i dont have the foggiest how to do so. Well i could go through i vertex at a time and chnge it i suppose but i thought (well hoped) microsft would have a special function to do it for me.

Well there IS a function that will generate a bounding sphere for your mesh so that you don't need to go through it yourself (D3DXComputeBoundingSphere). With that it should be very easy to scale your vertices one at a time.

BYTE* vbPointer = NULL;D3DXVECTOR3 boundingCenter;FLOAT boundingRadius;mesh->LockVertexBuffer(0, (VOID**)&vbPointer);D3DXComputeBoundingSphere((D3DXVECTOR3*)vbPointer, numVertices, mesh->GetNumBytesPerVertex(), &boundingCenter, &boundingRadius);FLOAT scaleValue = 1.0f / (D3DXVec3Length(&boundingCenter) + boundingRadius);for (UINT i = 0; i < mesh->GetNumVertices(); i++){     *(D3DXVECTOR3*)vbPointer = *(D3DXVECTOR3*)vbPointer * scaleValue;     vbPointer += mesh->GetNumBytesPerVertex();}mesh->UnlockVertexBuffer();

That should do the trick, I think. At least, it seems to work for me.

Awsome. Thanks. I will give it a go.

galapogos

Oh and I forgot to mention...that code assumes that the vertex position is located in the first 3 FLOAT's of each vertex. If that's not the case, you'll need to make a slight modification.