Modelling the Sunglasses Arm and Lens Rim

I had some time to make up this week so I've been working really hard to catch up to the in class demonstrations. The most difficult part so far was the glasses arm as its shape is so organic but the tutorials were easy enough to follow.

I had tried previously to use the cavity feature with no luck so i was glad to learn how to use it. I had trouble when i tried to select it from the features menu as the function was grayed out. After trying to figure out how to get it back I realised my problem was that my arm was still a surface as I did not make it into a solid when I made the part. Once I figured that out it worked perfectly.

When I first made the hinge part I did not take it out of the arm and therefore did not know about the lugs on the bottom. When I saw them in the video I went back into my original park and added them in.

 I would never have figured out how to make the lens rim like this but it was so easy once I knew how. The boundary surface tool was new to me, as was the untrim surface tool.