3D software packages use the Cartesian Co-ordinate System to create the illusion of working in three-dimensional space
This system was created by French Mathematician Rene Descartes in 1637 to try to merge algebra and Euclidean Geometry. It has had an important role in analytical geometry, calculus and cartography.
The two axes that commonly define the 2-dimensional Cartesian system are x and y.
The point where the two axes meet is known as the origin (0,0)
Early in the19th Century the z axis was added. It is known as the depth axis. With this third axis it is possible to identify any point in a three-dimensional space.
A point 59 units along the negative x axis, 100 units along the positive y axis and 50 units along the negative z axis, using the formula (x,y,z) would be written
(-59,100,-50)
The purpose of viewports is to be able to view a 3-dimensional object from different angles at the same time. An orthographic view displays only two axes at a time and in the viewports the top, left and front viewports all show orthographic views. Perspective shows a three- dimensional view.
Filed under: Cartesian Co-ordinate System
