My interactive sketch utilizes the illusion of rotation created by a combination of sine wave movement and altering gradients, based on the vertical position of the shapes created by the user. The interaction I really wanted to create between the user and the sketch was a two-way creation of illusional movement. The sketch gives the user a blank canvas on which to start drawing, and gives rise to the user drawing on screen the shape that they want to create out of a trail of squares – the entire trail also moves horizontally in response to the mouse to let the user have more input into its position. In turn, the sketch takes this trail and gives feedback not only in a rise and fall of the squares based on a sine curve, but also by slowly rocking the squares back and forth to create the illusion of the entire shape on screen tumbling towards the user.
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