Class: AxSmoothingGroups

The class assumes a mesh built of polygon faces, where each face is formed by indices to a vertex array. Each face may belong to a number of smoothing groups, which are denoted by the bits of a value. The input data is loaded through the SetFaceSmoothingGroup() and AddFaceVertex() methods, by which the original geometry of a mesh is input. While using the SetFaceSmoothingGroup() and AddFaceVertex() methods, a set of vertex indices and faces are being created, in which faces with no matching smoothing groups no longer share the same vertices. This is achieved by creating a new vertex whenever an original vertex is shared between faces whose smoothing groups do not match. The vertices of the newly build mesh can be accessed by the vertexIndices member variable, where each element represents a vertex and the value of each element is an index to the originally input vertex The faces of the newly build mesh can be accessed by the faces member variable, where each element represents a face with vertices represented by indices that point to the vertexIndices member variable. For example, the index to the original vertex of the n-th new face's m-th vertex would be vertexIndices[faces[n].indices[m]] The algorithm simply accumulates for each vertex all the smoothing groups of each face the vertex has been used by, and when a face's smoothing groups do not match any of the accumulated smoothing groups of a vertex it uses, then a new vertex is created and the face is fed with the index of that new vertex. The new mesh data may have more vertices than the original and will always have the same number of faces.