lamp-shape

Arguments: lamp

Returns or sets (with setf) the shape the argument lamp. The value is a keyword symbol indicating the shape in which to draw the lamp image. The choices are :circle, :rectangle, :triangle, and :diamond. If the value property is an array (thus showing an array of lamps), then all of the lamp images will have this same shape. The default value is :circle, which is typically interpreted as an LED (light-emitting diode).

See the description of the lamp control.

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Created 2015.5.21.