Which comes first in terms of bevel gear design shape or mechanism?

The issue of who comes first and who comes last in the design of Bevel Gears has always been a contradictory topic. Generally speaking, the purpose of styling design is to meet the needs of mechanism design, or to start styling design after the completion of mechanism design. Moreover, due to different product characteristics, we cannot generalize. Moreover, in the process of modeling, its characteristics can be equivalent to a reproduction of the mechanism design process, which means that the purpose of modeling is not only the shape elements, but also the functional elements of mechanism design. The intention between the two is also relatively clear. Therefore, in the design of bevel gears, we do not need to overly focus on the issue of who comes first and who comes last in terms of shape design and mechanism design