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Approximating smooth surfaces with Polygon nets
Networks of polygons are used to represent smooth surfaces. They are, of course, only an approximation to the true surface, but they are adequate for most computer graphics tasks. One of the commonest uses of the technique is to approximate a cylinder by the use of a set of flat polygons.
The Lambert shading model is a great improvement over wire-frame drawings as far as realism is concerned. It is also a reasonably fast technique when compared to some of the alternatives that we are about to meet. It is, however, far from perfect. Using a different colour for each polygon means that the polygons show up very clearly (the appearance of the model is said to be faceted). This is fine for a cube, but not so good when attempting to use the polygon as part of a smooth surface. Figure 3.22 shows 32 flat surfaces, arranged in a circle, pretending to be a cylinder. The difference in intensity between neighbouring sections can easily be seen.
Q. Devise a representation for a given list where insertions and deletions can be made at both the ends. Such a structure is called Deque (which means Double ended queue). Write fu
What are the Dynamic arrays Dynamic arrays are convenient for programmers since they can never be too small-whenever more space is needed in a dynamic array, it can simply be e
There are four data type groups: Integer kepts whole numbers and signed numbers Floating-point Stores real numbers (fractional values). Perfect for storing bank deposit
include int choice, stack[10], top, element; void menu(); void push(); void pop(); void showelements(); void main() { choice=element=1; top=0; menu()
1. Start 2. Get h 3. If h T=288.15+(h*-0.0065) 4. else if h T=216.65 5. else if h T=216.65+(h*0.001) 6. else if h T=228.65+(h*0.0028) 7. else if h T=270.65 8.
Open addressing The easiest way to resolve a collision is to start with the hash address and do a sequential search by the table for an empty location.
Q. Write down an algorithm to evaluate an expression given to you in postfix notation. Show the execution of your algorithm for the following given expression. AB^CD-EF/GH+/+*
Spanning Trees: A spanning tree of a graph, G, refer to a set of |V|-1 edges which connect all vertices of the graph. There are different representations of a graph. They are f
Assume a complete binary tree T with n nodes where each node has an item (value). Label the nodes of the complete binary tree T from top to bottom & from left to right 0, 1, ..., n
Step 1: Declare array 'k' of size 'n' i.e. k(n) is an array which stores all the keys of a file containing 'n' records Step 2: i←0 Step 3: low←0, high←n-1 Step 4: while (l
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