Zoom Lens

Author:slik

This creates a rectangle which is a zoom lens. It's image is shown in Graphics 2. Drag the red point to make the rectangle and to change zoom. Move the rectangle by dragging it. The rectangle maintains the aspect ratio of Graphics 2.

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montecarlo circles 5
Untitled
From Polar to Cartesian Coordinates
Perspective in Art
函數的奇偶性

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semiplanos
Step 6
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Bart.
Método de Eratostenes

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Rotation
Set Theory
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