As in the previous case, relative proportions of objects are maintained only if the aspect ratio of the viewport is the same as the aspect ratio of the clipping window
Various techniques are used to provide text clipping in a computergraphics. It depends on the methods used to generate characters and the requirements of a particular application.
The picture is stored in the computer memory using any convenient Cartesian co-ordinate system, referred to as World Co-Ordinate System (WCS). Picture is displayed on the display device it is measured in Physical Device Co-Ordinate System (PDCS) corresponding to the display device.
2D Transformations “Transformations are the operations applied to geometrical description of an object to change its position, orientation, or size are called geometric transformations”.
Initially, every line endpoint is assigned a four digit binary value called a region code, and each bit is used to indicate whether the point is inside or outside one of the clipping-window boundaries.
