Etch-A-Sketch Assignment
The task is to create a simple drawing application that resembles a child's toy called an Etch-A-Sketch. (Examples at bottom of this page)
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Background on the toy and how it works:
- Etch A Sketch is a mechanical drawing toy invented (1960) by André Cassagnes of France and subsequently manufactured by the Ohio Art Company and now owned by Spin Master of Toronto, Ontario, Canada.
- An Etch-A-Sketch is a rectangular frame (generally red) with a silver screen in the center and two white knobs, one in each of the lower corners.
- Inside the silver screen is a point of darker gray. As you turn the knobs, the darker gray point moves around the screen, leaving a darker gray trail behind it. By controlling the knobs carefully, you can draw pictures.
- Each knob controls one direction of motion of the darker grey dot.
- Rotating the left knob moves the dot from side to side.
- Rotating the right knob moves the dot up and down.
- By rotating just one knob -- by leaving the position of the other knob fixed, or constant -- you can draw a straight (horizontal or vertical) line. By rotating both knobs at appropriately coupled velocities, you can draw diagonal lines of varying slope.