According to the OBJ spec, a negative index in a face line should be interpreted as an offset from the end of the vertex list. The current parser supports only positive indices, but should be modified to match the spec (since many packages seem to use the negative index convention).
According to the OBJ spec, a negative index in a face line should be interpreted as an offset from the end of the vertex list. The current parser supports only positive indices, but should be modified to match the spec (since many packages seem to use the negative index convention).