Wires
Wires are simply collections of vertices with implied lines between each adjacent vertex.
Although wires might look continuous in the schematic, a wire only every actually joins two nodes with a node being either a device port or a dot in the schematic where two or more wires or device ports connect. A wire joining two nodes may still contain several vertices as it snakes around the schematic.
wires are consolidated continuously as the schematic is drawn so a wire might be split or combined as things are connected.
Wires can be selected by:
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a vertex - in which case just the vertex can be deleted or moved or the entire wire containing the vertex can be deleted.
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a segment (a line between two vertices), which is really just multiple selections of two vertices - in which case the two vertices can be moved or deleted.
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multiple vertices.
Currently, wire handling is a bit awkward and will be improved in the future.