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  2. Perspective (geometry) - Wikipedia

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

    Two figures in a plane are perspective from a point O, called the center of perspectivity, if the lines joining corresponding points of the figures all meet at O. Dually , the figures are said to be perspective from a line if the points of intersection of corresponding lines all lie on one line.

  3. 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 ...

  4. 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 ...

  5. Vanishing point - Wikipedia

    en.wikipedia.org/wiki/Vanishing_point

    In 5-point perspective the vanishing points are mapped into a circle with 4 vanishing points at the cardinal headings N, W, S, E and one at the circle's origin. A reverse perspective is a drawing with vanishing points that are placed outside the painting with the illusion that they are "in front of" the painting.

  6. Contour drawing - Wikipedia

    en.wikipedia.org/wiki/Contour_drawing

    Another technique similar to contour drawing is outline drawing; a division between form and the space a subject occupies. [4] All three types of drawing are considered to be gesture drawings; [4] the practice of drawing a series of bodies in still form. An outline drawing does not include the visual amusement of human sight, while a contour ...

  7. Betty Edwards - Wikipedia

    en.wikipedia.org/wiki/Betty_Edwards

    Drawing, says Edwards, has five component skills of perception and drawing: [4] Edges and lines (includes copying drawings and contour drawing exercises) Negative space (i.e. space between items) Relationships (i.e. perspective and proportion between things) Light and shadows (shading) The whole: gestalt which emerges as the first four are ...

  8. 3D projection - Wikipedia

    en.wikipedia.org/wiki/3D_projection

    The weak-perspective model thus approximates perspective projection while using a simpler model, similar to the pure (unscaled) orthographic perspective. It is a reasonable approximation when the depth of the object along the line of sight is small compared to the distance from the camera, and the field of view is small.

  9. Axonometric projection - Wikipedia

    en.wikipedia.org/wiki/Axonometric_projection

    [2] [3] Typically in axonometric drawing, as in other types of pictorials, one axis of space is shown to be vertical. In isometric projection , the most commonly used form of axonometric projection in engineering drawing, [ 4 ] the direction of viewing is such that the three axes of space appear equally foreshortened , and there is a common ...

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