Perspective (from Latin
perspicere, to see through) in the graphic arts, such as drawing, is an
approximate representation, on a flat surface (such as paper), of an image as
it is seen by the eye. The two most characteristic features of perspective are
that objects are drawn:
• Smaller as their distance from the observer increases
Foreshortened: the size of an
object's dimensions along the line of sight are relatively shorter than
dimensions across the line of sight
Linear
perspective always works by representing the light that passes from a scene
through an imaginary rectangle (the painting), to the viewer's eye. It is
similar to a viewer looking through a window and painting what is seen directly
onto the windowpane. If viewed from the same spot as the windowpane was
painted, the painted image would be identical to what was seen through the
unpainted window. Each painted object in the scene is a flat, scaled down
version of the object on the other side of the window. Because each portion
of the painted object lies on the straight line from the viewer's eye to the
equivalent portion of the real object it represents, the viewer cannot perceive
(sans depth
perception) any difference between the painted scene on the
windowpane and the view of the real scene. All perspective drawings assume the
viewer is a certain distance away from the drawing. Objects are scaled relative
to that viewer. Additionally, an object is often not scaled evenly: a circle
often appears as an ellipse and a square can appear as a trapezoid. This
distortion is referred to as foreshortening.
Perspective drawings
have a horizon line, which is often implied. This line, directly opposite the
viewer's eye, represents objects infinitely far away. They have shrunk, in the
distance, to the infinitesimal thickness of a line. It is analogous to (and
named after) the Earth's horizon.
Any perspective
representation of a scene that includes parallel lines has one or more vanishing points in a
perspective drawing. A one-point perspective drawing means that the drawing has
a single vanishing point, usually (though not necessarily) directly opposite
the viewer's eye and usually (though not necessarily) on the horizon line. All
lines parallel with the viewer's line of sight recede to the horizon towards
this vanishing point. This is the standard "receding railroad tracks"
phenomenon. A two-point drawing would have lines parallel to two different
angles. Any number of vanishing points are possible in a drawing, one for each
set of parallel lines that are at an angle relative to the plane of the
drawing.
Perspectives
consisting of many parallel lines are observed most often when drawing
architecture (architecture frequently uses lines parallel to the x, y, and z
axes). Because it is rare to have a scene consisting solely of lines
parallel to the three Cartesian axes (x, y, and z), it is rare to see
perspectives in practice with only one, two, or three vanishing points; even a
simple house frequently has a peaked roof which results in a minimum of six
sets of parallel lines, in turn corresponding to up to six vanishing points.
In contrast, natural scenes
often do not have any sets of parallel lines. Such a perspective would thus
have no vanishing points.
I tried to make perspective drawing from 1 point to 3 point.
I still confuse to make 4 points and 5 points but the result is really interesting. i want to make it!
Happy Perspective :b
JAJ
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