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Visualization
A circuit can be visualized in different ways.
The schematic only defines the function of a circuit. A nice layout helps people to understand the function. A functional layout is required for the manufacturing process.
As the different ways of visualizing a circuit are all based on the same electrical wiring, it should be possible to switch from one type to the other without changing the circuit.
The schematic representation can be complete in the sense that all wires are drawn as direct lines from source to sink terminal. This is especially useful for small circuits.
The schematic representation can however also be element-based, meaning that wires coming from an element terminal end with a label, which specifies where the wire will be leading to, while no lines connect the electrically connected terminals directly. This representation is useful to manage more complex circuits.
In the layout representation all elements are placed in the actual position where they will appear on the board. This representation is usually difficult to oversee and understand, but offers the advantage of being able to plan details of the board production (size requirements etc.).
The render representation is a special type of layout representation in which additionally to actual element positioning all elements are rendered as they actually look like in the real world, e.g. an (electrolyte) capacitor is not represented as two parallel lines but as a circle. This feature shall allow to preview how the final board will look like and also to manage all elements' space requirements on the board.