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  2. CAD standards - Wikipedia

    en.wikipedia.org/wiki/CAD_standards

    This article may require copy editing for clarity, flow. ... In AutoCAD usually parts to be printed in black are drawn in 1 to 7 basic colors. Color layer: Green ...

  3. Boundary representation - Wikipedia

    en.wikipedia.org/wiki/Boundary_representation

    In solid modeling and computer-aided design, boundary representation (often abbreviated B-rep or BREP) is a method for representing a 3D shape [1] by defining the limits of its volume. A solid is represented as a collection of connected surface elements, which define the boundary between interior and exterior points.

  4. Box-drawing characters - Wikipedia

    en.wikipedia.org/wiki/Box-drawing_characters

    Midnight Commander using box-drawing characters in a terminal emulator. Box-drawing characters, also known as line-drawing characters, are a form of semigraphics widely used in text user interfaces to draw various geometric frames and boxes.

  5. Object copying - Wikipedia

    en.wikipedia.org/wiki/Object_copying

    The resulting object is called an object copy or simply copy of the original object. Copying is basic but has subtleties and can have significant overhead. There are several ways to copy an object, most commonly by a copy constructor or cloning. Copying is done mostly so the copy can be modified or moved, or the current value preserved.

  6. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    When part definition is defined mathematically via a solid model, the assertion that one cannot interrogate the model—the direct analog of "scaling the drawing"—becomes ridiculous; because when part definition is defined this way, it is not possible for a drawing or model to be "not to scale". A 2D pencil drawing can be inaccurately ...

  7. Multiview orthographic projection - Wikipedia

    en.wikipedia.org/wiki/Multiview_orthographic...

    The fact that the inner circle is drawn with a solid line instead of dashed identifies this view as the front view, not the rear view. The side view is an isosceles trapezoid . In first-angle projection , the front view is pushed back to the rear wall, and the right side view is pushed to the left wall, so the first-angle symbol shows the ...

  8. Constructive solid geometry - Wikipedia

    en.wikipedia.org/wiki/Constructive_solid_geometry

    Constructive solid geometry (CSG; formerly called computational binary solid geometry) is a technique used in solid modeling. Constructive solid geometry allows a modeler to create a complex surface or object by using Boolean operators to combine simpler objects, [ 1 ] potentially generating visually complex objects by combining a few primitive ...

  9. Polyhedron - Wikipedia

    en.wikipedia.org/wiki/Polyhedron

    A convex polyhedron is a polyhedron that forms a convex set as a solid. That being said, it is a three-dimensional solid whose every line segment connects two of its points lies its interior or on its boundary; none of its faces are coplanar (they do not share the same plane) and none of its edges are collinear (they are not segments of the ...