This week in 2D practice we were tasked to create a cycle of a flour sack hula hooping. To begin this exercise, we went out into the courtyard to record reference videos for our timings:
From here, we created a few basic key frames for the flour bag and the hoop, before adding more inbetweens.
From there, I wanted to smooth the movement of the hoop, as the 'corners' seemed to have a jagged and uneven movement. Taking in mind the movement of arcs, I experimented with following a pair of ovals as guides.
I found that the ovals, although smoothing the movement of the hoop, also caused it to seem to move from side to side rather than around the flour bag. To counter this, I created a timing chart and marked out the places on the flour bag where the hoop should be making contact in each frame.
After a little more experimentation, I began inking the animation, beginning with the flour bag. As the hoop remains in the same spot throughout the cycle, initially I used the same section of lineart for all of my frames, only drawing the top of the bag afresh for each frame.
I found that this technique had the opposite effect to what I had hoped - making the bottom of the sack look unnatural and the movements look strange, so I restarted my line work, drawing the whole frame from scratch with the lightbox tool. I was happy with this line work, and finished up by colouring the bag and hoop.
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