Polygon clipping algorithm, Computer Graphics

Write a polygon clipping algorithm to clip a polygon against rectangular clipping are.

Read the vertices of polygon to be clipped. 2. Read the coordinates of the rectangular clipping area against which it has to be clipped. 3. Considering the edge of rectangular area one at a time we apply the following algorithm. 4. /* p is the input vertex, vertex under consideration S is the previous vertex. F is the first point. E is the edge under consideration (of rectangular 7 area against which it has to be clipped) */ Input vertex P 5. If P is the point store it in a variable say F and proceed to step 7. 6. If P is not the first point then if edge 5t intersect edge E under consideration. Computer the intersection point 1 Output vertex 1 else proceed to step 7. 7. Store P in variable S (S=P) 8. If S is on left side of edge E output vertex S. 9. Repeat steps 4 to 8 till all the vertices are processed 10. /* for closing polygon */ if 3f intersect E Computer intersection point 1 output vertex 1 11. Repeat the above steps (4 to 10) with new output polygon obtained from step 10 for other edges of rectangular area under consideration. 


Posted Date: 7/1/2012 6:43:52 AM | Location : United States

Related Discussions:- Polygon clipping algorithm, Assignment Help, Ask Question on Polygon clipping algorithm, Get Answer, Expert's Help, Polygon clipping algorithm Discussions

Write discussion on Polygon clipping algorithm
Your posts are moderated
Related Questions
What is reflection?  The reflection is actually the transformation that produces a mirror image of an object. For this use some angles and lines of reflection.

Magnify a triangle with vertices A = (1,1), B = (3,1) and C = (2,2) to twice its size in such a way that A remains in its original position.  Answer: You need to apply scaling b

Electronic Encyclopedia : This is the application of multimedia for the creation of an encyclopedia along with millions of entries and hypertext cross references covering a br

Disadvantages : 1)   Doubles memory needs, one for at least z-buffer and one for refreshes- buffer. 2)   Dependency of device and memory intensive. 3) Wasted calculation u

what is refresh buffer/ identify the content and organisation of the refresh buffer for the case of raster display and vector display.

Steps uses in the Cohen Sutherland Line Clipping Algorithm are: Figure: Steps for Cohen Sutherland Line Clipping STEP 1: Input:  x L , x R , y T , y B

What is Polygon mesh?  Polygon mesh is a method to show the polygon, when the object surfaces are tiled, it is more convenient to state the surface facets with a mesh function.

The image you have been given for contour extraction is shown in Figure 1. The method for constructing the search space is shown in Figure 2. It is generated from two initial discr

what is fixed point scaling?