Date post: | 12-Jul-2015 |
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[dictionary]The technique of representing three-dimensional objects and depth relationships on a two-dimensional surface.
[wikipedia]Is an approximate representation, on a flat surface (such as paper), of an image as it is seen by the eye
Characteristic features
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
Albrecht Durer He said that if two painters were to draw a scene from two different angles, the paintings would be different but then, what would they have in common?
Perspective developed
during the renaissance
period
Filippo Brunelleschione of the foremost architects and
engineers of the Renaissance
Invented artistic linear perspective
BV
Before AfterIllusion of depth
Oddness and flatnessSize of elements according to distance
Shapes
Reconstruction of the Temple
of JerusalemThe school of athens
Vanishing pointthe point at which parallel lines receding from an observer seem to converge
Picture plane or painting
platethe appearance of things relative to one another as determined by their distance to the viewer
Axisa reference line from which distances or angles are measured in a coordinate system
1. One-point perspective
2. Two-point perspective
3. Three-point perspective
4.Four-point perspective
5.Zero-point perspective
6. Foreshortening
Characteristics-one vanishing point is present-one-point perspective is present when the scene drawn is composed of-line segments which intersect only at right angles
Applications- one-point perspective can be used when subject is made up of lines which are either parallel with the viewer’s line of sight or perpendicular
Draw a horizontal line
Indicate vanishing point in the horizontal line
Draw desired shape
Draw lines from the shape’s corners to vanishing point
Draw vertical and horizontal lines to finish desired shape
http://www.slideshare.net/Lexi83/perspective-ppt
Characteristics-two vanishing points are present
-one point represents a set of parallel lines-other point represents the other set
-to make things easy, imagine you are in a junction
Applications-scenes wherein one-point perspective is used but rotated-corner of a building, book, box, two forked roads
Draw guide lines (horizontal and vertical)
Indicate left and right vanishing points
Draw desired height of object (vertical)
Draw lines from tips to vanishing points
http://www.slideshare.net/jgammill/two-point-perspective
Characteristics-three vanishing points are present-two points (from two-point perspective) one for each wall-third vanishing point is used for how those walls vanish into the ground
Applications-used for buildings seen from above or below
Characteristics-two vanishing points are present
-one point represents a set of parallel lines-other point represents the other set
-to make things easy, imagine you are in a junction
Applications-scenes wherein one-point perspective is used but rotated-corner of a building, book, box, two forked roads
Characteristics-two vanishing points are present
-one point represents a set of parallel lines-other point represents the other set
-to make things easy, imagine you are in a junction
Applications-scenes wherein one-point perspective is used but rotated-corner of a building, book, box, two forked roads
Characteristics-two vanishing points are present
-one point represents a set of parallel lines-other point represents the other set
-to make things easy, imagine you are in a junction
Applications-scenes wherein one-point perspective is used but rotated-corner of a building, book, box, two forked roads
- Projections wherein parallel lines remain parallel.
-Ratios of distances between two different points (in a line) are preserved.
- Three types: elevation, oblique projections, and isometric projections.
- Only two
coordinates
are
considered
Drawn from an angle, causing the front sides to look distorted.
The floor is drawn without distortions. TheThe walls emerge at an angle.
The perpendicular corners form 120 degree angles.
DO WE REALLY SEE THESE FIGURES WHEN WE LOOK AT A NORMAL HOUSE?
WHY OR WHY NOT?
This is where perspective comes in…
What’s the difference?
The cone of vision is only thirty degrees about the axis so the vanishing points of a cube at both sides can’t be seen at the same time.
- Since two parallel lines never intersect, these ‘vanishing points’ do not really exist in three-space, so where are they located?
-A solution to this problem was introduced by
Desargues.
- He introduced the idea that “points at infinity” exist.
- It is also called the ideal point.
- The union of the number line and its point at infinity will yield a closed curve. (the real projective line)
- All lines now intersect, including parallel lines.
- New arithmetic operations were defined in this kind of system.