Example which cause problems for hidden-surface algorithms, Data Structure & Algorithms

Assignment Help:

Example which cause problems for some hidden-surface algorithms

Some special cases, which cause problems for some hidden-surface algorithms, are penetrating faces and cyclic overlap. A penetrating face occurs when polygon A passes through polygon B. Cyclic overlap occurs when polygon A is in front of polygon B, which is in front of polygon C, which is in front of Polygon A. Actually, we need only two polygons for cyclic overlap; imagine a rectangle threaded through a polygon shaped like the letter C so that it is behind the top of the C but in front of the bottom part. For the various hidden-surface methods we have presented, discuss whether or not they can handle penetrating faces and cyclic overlap.

(b)  (i) Show that no polygon subdivision takes place in applying the binary space partition method to a convex object.

(ii)  For the case of convex object compare the cost of the back-face removal method with that of the binary space partition method for a single view.

(iii)  Suppose we wish to display a sequence of views of a convex object. How would the cost of using back-face removal compare to the binary space partition scheme?

(c)  Modify the back-face algorithm for unifilled polygons so that instead of removing back faces it draws them in a less pronounced line style (e.g., as dashed lines).

(d)  Test the painter's algorithm by showing several filled polygons with different interior styles and different states of overlap, entered in mixed order.

(e)  Test the painter's algorithm by showing two houses composed of filled polygons with different interior styles. Select a view such that one house partially obscures the other house.

(f) Sketch the minimax boxes for the tangent polygons shown in figure. What conclusions can you make?

 

642_data structure.png


Related Discussions:- Example which cause problems for hidden-surface algorithms

Mathematical-model with a collection of operations, A mathematical-model wi...

A mathematical-model with a collection of operations described on that model is known as??? Abstract Data Type

linear-expected-time algorithm, Implement a linear-expected-time algorithm...

Implement a linear-expected-time algorithm for selecting the k th smallest element Algorithm description 1. If |S| = 1, then k = 1 and return the element in S as the an

Explain linked list, Linked List  A linked list is a linear collection...

Linked List  A linked list is a linear collection of data elements called nodes. The linear order is given by pointer. Every node is divided into 2 or more parts.

Example of binary search, Let us assume a file of 5 records that means n = ...

Let us assume a file of 5 records that means n = 5 And k is a sorted array of keys of those 5 records. Let key = 55, low = 0, high = 4 Iteration 1: mid = (0+4)/2 = 2

Last in first out method, This method is the reverse of FIFO and assumes th...

This method is the reverse of FIFO and assumes that each issue of stock is made from latest items received in the enterprises .Thus if the last lot to be received is not sufficient

B-TREE and AVL tree diffrance, Explain process of B-TREE and what differen...

Explain process of B-TREE and what difference between AVL Tree Using Algorithms

Non-recursive algorithm to traverse a tree in preorder, Write the non-recur...

Write the non-recursive algorithm to traverse a tree in preorder.    The Non- Recursive algorithm for preorder traversal is as follows: Initially  push NULL onto stack and

Bubble sort, Q. The reason bubble sort algorithm is inefficient is that it ...

Q. The reason bubble sort algorithm is inefficient is that it continues execution even after an array is sorted by performing unnecessary comparisons. Therefore, the number of comp

Algorithm for determining strongly connected components, Algorithm for dete...

Algorithm for determining strongly connected components of a Graph: Strongly Connected Components (G) where d[u] = discovery time of the vertex u throughout DFS , f[u] = f

Find the optimal solution - branch and bound algorithm, Consider the follow...

Consider the following 5-city traveling salesman problem. The distance between each city (in miles) is shown in the following table: (a) Formulate an IP whose solution will

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