Potentially entering and leaving points - clipping, Computer Graphics

Assignment Help:

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.


Related Discussions:- Potentially entering and leaving points - clipping

Zero acceleration (constant speed), Zero Acceleration (Constant Speed ) ...

Zero Acceleration (Constant Speed ) Now, the time spacing for the in-betweens that is: in-between frames is at equal interval; which is if, we want N in-betweens for key frames

Silicon graphics - hardware for computer animation, Silicon Graphics - Hard...

Silicon Graphics - Hardware for computer animation The SGI platform is one of the most broadly used hardware platforms in professional or broadcast feature computer animation

Graphics programming, Explain rubber-band interactive picture technique

Explain rubber-band interactive picture technique

Pears son education, What is scan conversion explain the four adverse side ...

What is scan conversion explain the four adverse side effect of scan conversion

Word perfect graphic, WPG: It is word perfect graphic file that is used vi...

WPG: It is word perfect graphic file that is used via Word Perfect. It first came out with the release of word perfect 5.0. Such files can include bitmaps, line arts and vector gr

Raster scan Display, Draw and explain the diagram of a Raster scan system w...

Draw and explain the diagram of a Raster scan system with a display processor. Explain each unit of the diagram.

Open Gl, Write a program in C/C++ using OpenGL to create (without using bui...

Write a program in C/C++ using OpenGL to create (without using built in function) a square by implementing shear algorithm along 1. X-axis, 2.Y-axis.

How graphics output changes according to dpi, Question : (a) List and d...

Question : (a) List and describe important aspects to take into consideration when looking at paper for print. (b) Describe clearly the meaning of the following words: I.

Method to draw an object by using four bézier curves, Suggest a method to d...

Suggest a method to draw an object as in figure using four Bézier curves of suitable degree Answer: Employ four quartic Bézier curves with the endpoint of one as the initial poi

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd