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PCB topology routing
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Mikolaj Wielgus 14c3acb633 Change `Shape` from struct to enum 
It's more readable to use a match rather than an odd if condition.
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README.md

Topola

Topological router in Rust.

Gallery

Animation. There are two upward barriers, with some space between tem, around which four rubberband traces, one over another, are wrapped. Enter mouse cursor. The cursor begins to stretch the left barrier to the right. As it's stretched, the traces cease to be wrapped around the right barrier, becoming "free". The traces and the barrier are two-dimensional and all solid red. The background is black but also very slightly white and blue.

This animation shows four traces wrapped around a vertical barrier like rubberbands. Computercursor appears and starts dragging the barrier's top end left and right, up and down, elasticallystretching the barrier and having the traces continue being wrapped on the barrier regardless ofits position. The traces and the barrier are all solid red. The background is black but also veryslightly white and blue.

Animation. There is an upward barrier in the middle and dots on the left and right of it, four each. A trace is drawn from the leftmost dot on the left to the rightmost dot on the right. Then a trace is drawn from the second leftmost dot on the left to the second rightmost dot on the right, displacing the previous trace so that there's space for the new one. Same happens for the remaining dots. The dots, traces and barrier are all solid red. The background is black but also very slightly white and blue.

Three red-colored traces pass around a barrier. Trace bends are not aligned to a grid unlike most PCB layouts these days (this is called "topological routing"). The traces and the barrier are all solid red. The background is black but also veryslightly white and blue.

A trace zigzagging around two barriers. The trace and the barriers are all solid red. The background is black but also very slightly white and blue.