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2. Perspective (graphical) - Wikipedia

   en.wikipedia.org/wiki/Perspective_(graphical)

   Linear or point-projection perspective (from Latin perspicere 'to see through') is one of two types of graphical projection perspective in the graphic arts; the other is parallel projection. [ citation needed ] [ dubious – discuss ] Linear perspective is an approximate representation, generally on a flat surface, of an image as it is seen by ...

3. Camera lucida - Wikipedia

   en.wikipedia.org/wiki/Camera_lucida

   In the simplest form of camera lucida, the artist looks down at the drawing surface through a glass pane or half-silvered mirror tilted at 45 degrees. This superimposes a direct view of the drawing surface beneath, and a reflected view of a scene horizontally in front of the artist. This design produces an inverted image which is right-left ...

4. Perspective machine - Wikipedia

   en.wikipedia.org/wiki/Perspective_machine

   1825: English inventor Francis Ronalds patents two perspective tracing machines. One generated an accurate drawing of an object or scene in nature and the other created a perspective view of an object from drawings of the plan and elevations. Ronalds manufactured the machines and sold several hundreds of them. [9] [10]

5. PowerCADD - Wikipedia

   en.wikipedia.org/wiki/PowerCADD

   An add-on tool set, called WildTools, was developed by an independent programmer, bringing a number of new capabilities to the program, including isometric and perspective-drawing tools. Both are available in "demo" form to allow hands-on trial use. The current shipping version is PowerCADD 9, which was released August 2010.

6. Technical drawing - Wikipedia

   en.wikipedia.org/wiki/Technical_drawing

   A cutaway drawing is a technical illustration, in which part of the surface of a three-dimensional model is removed in order to show some of the model's interior in relation to its exterior. The purpose of a cutaway drawing is to "allow the viewer to have a look into an otherwise solid opaque object.

7. Multiview orthographic projection - Wikipedia

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

   An example of a multiview orthographic drawing from a US Patent (1913), showing two views of the same object. Third angle projection is used. In third-angle projection , the object is conceptually located in quadrant III, i.e. it is positioned below and behind the viewing planes, the planes are transparent , and each view is pulled onto the ...