How It Works
A pantograph is a mechanical linkage that copies and scales drawings.
Point A (black) is the fixed pivot.
Point E (red) follows your mouse - the stylus.
Point F (green) is the pen that draws a scaled copy.
The parallelogram BCDF maintains a constant ratio between AE and AF, creating perfect scaling.
Controls:
Move mouse to position stylus
Hold mouse button to draw
Adjust scale ratio with slider