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phantom lines

Lines that are made visible as dots or dashes to reveal the edges of objects currently hidden from view. See wireframe modeling.

wireframe modeling

In CAD, a technique for representing 3D objects, in which all surfaces are visibly outlined in lines, including the opposite sides and all internal components that are normally hidden from view. Compared to surface and solid modeling, wireframe modeling is the least complex method for representing 3D images.

Wireframe Image
The wireframe image at the top created in RoboCAD shows all hidden lines. In the middle, the hidden lines are turned into dotted lines, known as "phantom lines." The bottom shaded view could be a surface model or a solid model. (Redrawn from illustration courtesy of Robo Systems Corporation.)

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