Perspective ( Graphical )

Perspective (Graphical)

In glossary of art, perspective is one of the technique to represent a three dimensional world on a two dimensional surface in a way
that looks realistic and accurate,as we see it in nature. other than that, perspective applied as we known them today developed during
the Renaissance.

Three basic types of perspective are one-point,two-point and three point. This three points of perspective are refers to the number of
vanishing points used to create the perspective illusion. But the most commonly use is two point perspective.




                              One Point Perspective
Look straight at the side of an object. Uses only one vanishing point.

 In these example,the line of sight in one-point perspective is perpendicular (at a right angle to)

 the side of the cube.That means you see the near side in plane view

 (actual shape undistorted by perspective).

Vertical edges are shown as vertical lines.

Horizontal edges (perpendicular to the line of sight and parallel to the ground) are shown as horizontal lines.

Edges that recede (are parallel to the line of sight) are on lines that converge at the vanishing point on the

 horizon line.

These same three (and only these three) kinds of lines are used to draw the cubes regardless to where they are 

in the picture.

The cube to the left, while technically correct, appears distorted. One-point perspective only depicts 

objects near the vanishing point with accuracy.

Two Point Perspective

When look at or into the corner of the object. There are two vanishing points since the two sets of side are receding in two different ways. 

 There are only three different kinds of lines needed to draw in two-point perspective:

Vertical edges are drawn as vertical lines.

Edges of sides that recede toward the right are on lines converging at the right vanishing point.

Edges of sides that recede toward the left are on lines converging at the left vanishing point.

Both of the cubes in the example use only the same three kinds of lines. You see the top of the 

cube below the horizon line (your eye level). You see the bottom of the cube above the horizon line 

and more of its left side because it is to the right of your position in the center of the vanishing points.

In the real world vanishing points are very far apart. Imagine strings streaming out parallel to the edges of a
cube going to the horizon. The horizon is miles away so the vanishing points are many miles apart. When you
draw them only a few inches apart on a piece of paper there is going to be some distortion in the image produced.

Three Point Perspective

Three-point perspective is usually used for buildings seen from above (or below). In addition to the two vanishing points from before,
 one for each wall, there is now one for how those walls recede into the ground. This third vanishing point will be below the ground.
 Looking up at a tall building is another common example of the third vanishing point. This time the third vanishing point is high in space.