Potentially entering and leaving points - clipping, Computer Graphics

Potentially entering and leaving points - PE and PL

The intersection point of the line and window might be classified either like potentially leaving or entering. Before get further details, we describe the real meaning of potentially leaving and entering points (PL and PE). Potentially leaving and entering points are dependent upon the edge orientation, that is: direction. So now understand how to determine PE and PL; here we move anticlockwise across the window boundary then area of left hand side encloses the window.

1928_Potentially entering and leaving points - Clipping.png

Figure: (a): Potentially Entering PE and Potentially Leaving PL points

So here, we are moving from point P to point Q, and we understand that whereas traversing the windows edges in anticlockwise method the area lying on the left hand side is considered to as the window region. Consequently, from the Figure (a) in above, you may see that at point PE that we are moving from P to Q we are entering the window region, hence this point of intersection should be considered to as the potentially entering point (PE). Now, consider to the other intersection demonstrated in the Figure (a) in above, this time, also the movement of points on the line are found by varying value of parameter t is from point P to Q and  with respect to, the orientation of window boundary, we are leaving the window area. Therefore, this point of intersection is identified as potentially exiting point (PL).

PE that is potentially entering point while moving indirection of the window, the point of intersection among line PQ and the window edges faced are identified as potentially entering. PL that is potentially leaving point; these are the point of intersection encountered whereas we move away from window.

Posted Date: 4/3/2013 3:21:51 AM | Location : United States







Related Discussions:- Potentially entering and leaving points - clipping, Assignment Help, Ask Question on Potentially entering and leaving points - clipping, Get Answer, Expert's Help, Potentially entering and leaving points - clipping Discussions

Write discussion on Potentially entering and leaving points - clipping
Your posts are moderated
Related Questions
1. Design a bitmap for the English vowels A, E, I, O, U for two different sizes and then implement the bitmaps to plot these vowels on the display. Keep in mind that baseline of al

Cases for Subdivisions of Polygon No additional subdivisions of a particular area are desired, if one of the subsequent conditions is true as: Case 1: All the polygons ar

Implement the Scan line polygon fill algorithm for any arbitrary polygon in C-language and then use your code to fill each of the following type of polygon. i)  Convex polygon

Trivial acceptance case of cohen sutherland line clippings Case 1: it is Trivial acceptance case whether the UDLR bit codes of the end points P, Q of a provided line is 0000

Differentiate among interpolation spline and approximation spline?  When the spline curve passes by all the control points then it is known as interpolate. When the curve is

Explain depth buffer method

Low level techniques (motion specific) Techniques utilized to fully control the motion of any graphic object in any type of animation scene, these techniques are also considere

Question: (a) In computer graphics it is important to distinguish between the two approaches to graphical modeling:vector graphics and raster graphics. Explain in details th

Filled-Area Primitives  Filled-area primitives are one of the most important types of primitives used in Computer Graphics.  Basically filled-area primitives are meant to fill

refreh buffer