Výpočet BoundingBoxu 3D modelu v XNA 4.0

/// <summary>
/// Precalculate model's bounding box (by its vertices)
/// </summary>
public static BoundingBox GetBoundingBox(Model model)
{
    Vector3 min = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
    Vector3 max = new Vector3(float.MinValue, float.MinValue, float.MinValue);

    foreach (ModelMesh mesh in model.Meshes)
        foreach (ModelMeshPart meshPart in mesh.MeshParts)
        {
            int vertexStride = meshPart.VertexBuffer.VertexDeclaration.VertexStride;
            int vertexBufferSize = meshPart.NumVertices * vertexStride;

            float[] vertexData = new float[vertexBufferSize / sizeof(float)];
            meshPart.VertexBuffer.GetData<float>(vertexData);

            for (int i = 0; i < vertexBufferSize / sizeof(float); i += vertexStride / sizeof(float))
            {
                Vector3 position = new Vector3(vertexData[i], vertexData[i + 1], vertexData[i + 2]);
                min = Vector3.Min(min, position);
                max = Vector3.Max(max, position);
            }
        }

    return new BoundingBox(min, max);
}