Assumptions for area subdivision method, Computer Graphics

Assumptions for Area Subdivision Method

a) ¾   Plane of projection is z=0 plane

b) ¾ Orthographic parallel projections

c) ¾   Direction of projection as d= (0,0,-1)

d) ¾   suppose here, the viewing (screen) area is a square

e) ¾   Objects are made up of polygon faces.

1817_Assumptions for area subdivision method.png

To apply the area-subdivision method, we should identify whether the area is part of a single surface or a complex surface by means of visibility tests. If the tests specify that the view is sufficiently complicated, we subdivide it. Furthermore, we apply the tests to each of the smaller regions and then subdivide additionally, whether the tests specify that, the visibility of a particular surface is still not certain. We continue this process till the subdivisions are simply analyzed as belonging to a particular surface or till they are decreased to the size of a single pixel. Beginning with the full screen as the initial area, the algorithm divides an area at all stages in four smaller area, as demonstrated in figure 8 that is similar to quad-tree approach.

Posted Date: 4/5/2013 1:18:37 AM | Location : United States







Related Discussions:- Assumptions for area subdivision method, Assignment Help, Ask Question on Assumptions for area subdivision method, Get Answer, Expert's Help, Assumptions for area subdivision method Discussions

Write discussion on Assumptions for area subdivision method
Your posts are moderated
Related Questions
Rotation - 2-d and 3-d transformations Given a 2-D point P(x,y), that we want to rotate, along with respect to an arbitrary point A(h,k). Suppose P'(x'y') be the effect of ant

Matrix for Orthographic Projection Orthographic projections are projections into one of the coordinate planes x=0, y=0or z=0. The matrix for orthographic projection on the z=0

Other curves - parabola and hyperbola Conic sections such as parabola and hyperbola are used in many instances such as in motion planning along a trajectory or in modelling the

In this programming assignment, you will animate and pose 3D articulated characters by implementing forward and inverse kinematic methods. You should be able to animate character j

BlackJack is a popular card game played in many casinos. The player plays against the dealer aiming to reach 21 points, or a score higher than the dealer without exceeding 21. The

Assignment Task Your task is to review and compare the current cad/cam software systems available with the intention to make a recommendation in the form of a written report f


QUESTION 1. Describe two methods for converting 16x9 widescreen movie to 4x3. 2. Explain clearly the difference between File Format and Codec. 3. What is a video transiti

Persistence (of phosphor) - Display devices Time it takes the emitted light from screen to decay to one-tenth of its original intensity. The point where an electron gun strikes

What do you mean by Perspective projection?  Perspective projection is one in which the lines of projection are not parallel. Instead, they all converge at a single point known