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Array<uint8> ModelGetWeights(Geometry@ geo, int index)
{
    Array<uint8> ret; 
    for (int i = 0; i < geo.numVertexBuffers; i++) {
        VertexBuffer@ vb = geo.vertexBuffers[i];
        VectorBuffer vvb = vb.GetData();
        int pos = index * vb.vertexSize;
        for (int j = 0; j < vb.elements.length; j++) {
            if (vb.elements[j].semantic == SEM_BLENDINDICES) {
                vvb.Seek(pos + vb.elements[j].offset);
                ret.Push(vvb.ReadUByte());
                ret.Push(vvb.ReadUByte());
                ret.Push(vvb.ReadUByte());
                ret.Push(vvb.ReadUByte());
                break;
            }
        }
    }
    return ret;
}
uint GetIndex(IndexBuffer@ ib, int index)
{
    VectorBuffer ivb = ib.GetData();
    ivb.Seek(index * ib.indexSize);
    uint ret;
    switch (ib.indexSize) {
    case 1:
        ret = ivb.ReadUByte();
        break;
    case 2:
        ret = ivb.ReadUShort();
        break;
    case 4:
        ret = ivb.ReadUInt();
        break;
    default: /* Any other sizes? */
        ret = 0;
    }
    return ret;
}
Array<uint8> ModelGetWeightsIndex(Model@ model, int geo, int lod, int index)
{
    Array<uint8> ret;
    Geometry@ geom = model.GetGeometry(geo, lod);
    IndexBuffer@ ib = geom.indexBuffer;
    uint point = GetIndex(ib, index);
    return ModelGetWeights(geom, point);
}


void ModelRebuildIB(Model@ model, int minidx, int maxidx)
{
    for (int i = 0; i < model.numGeometries; i++) {
        for (int j = 0; j < model.numGeometryLodLevels[i]; j++) {
            Geometry@ geo = model.GetGeometry(i, j);
            IndexBuffer@ ib = geo.indexBuffer;
            IndexBuffer@ ibnew = IndexBuffer();
            ibnew.shadowed = true;
            VectorBuffer ivb = ib.GetData();
            VectorBuffer ivbnew;
            int count = 0;
            if (geo.primitiveType != TRIANGLE_LIST)
                continue;
            Print("fixing index count: " + ib.indexCount);
            Print("fixing index size: " + ib.indexSize);
            for (int l = 0; l < ib.indexCount; l++) {
                Array<uint8> indices = ModelGetWeightsIndex(model, i, j, l);
                bool skip = false;
                for (int k = 0; k < indices.length; k++)
                    if (indices[k] < minidx || indices[k] > maxidx)
                        skip = true;
                uint index = GetIndex(ib, l);
                if (!skip) {
                    Print("index: " + index);
                    ivbnew.WriteUInt(index);
                    count++;
                }
            }
            Print("IB count:" + count);
            ibnew.SetSize(count, true);
            ibnew.SetData(ivbnew);
            geo.SetIndexBuffer(ibnew);
            model.SetGeometry(i, j, geo);
        }
    }
}