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Explain Bresenham s circle drawing algorithm, OR Explain midpoint circle algorithm for scan converting a circle.
Midpoint Circle Algorithm 1. Input radius r and circle center (x c , y c) , and obtain the first point on the circumference of a circle centered on the origin as (x0, y0,) = (0, r) 2. Calculate the initial value of the decision parameter as p0 = 5/4-r 3. At each x k position, starting at k = 0, perform the following test: If p k <0 , the next point along the circle centered on (0,0) is (x k+1,y k) and p k+1 = p k + 2x k+1 + 1 Otherwise, the next point the circle is ( x k + 1, y k -1) and p k+1 = p k+ 2x k+1 + 1 -2 y k where 2x k+1 = 2xk +2 and 2yk+1 = 2y k -2. 4. Determine symmetry points in the other seven octants. 5. Move each calculated pixel position (x, y) onto the circular path centered on (x c,y c) and plot the coordinate values: x = x +x c, y = y + y c 6. Repeat steps 3 through 5 until x > y
Advantages of the z-buffer method: 1) The z-buffer method or algorithm is easy to apply and it needs no sorting of surface in a scene. 2) In z-buffer algorithm
Algorithms for Identification of Observable Objects There are various algorithms for identification of observable objects for various types of applications. Several methods ne
In this lab you will learn how to use chrominance1 to segment coloured images. Here you be detecting skin, however, you could use this method to detect other coloured regions in im
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
Film - Applications for Computer Animation Computer animation has turn into regular and accepted in particular effects. Movies as "Jurassic Park", "Terminator 2: Judgment Day"
Objectives of Three dimensional transformations explain basic 3D transformations-translation, rotation, scaling, shear and reflections-applied to objects in space; ex
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What are the features found in CAD Features generally found in a CAD package involve: - 2D and 3D modelling - Wire frame - Library of parts that can be used in new dra
Numerical Analysis Packages: generally utilized software is: MatLab. Characteristics: Focus generally on numeric processing. Programming with mathematical skills usuall
Reflection and Types of Reflection Reflection and its types: Reflection: this is the phenomenon of bouncing back of light; such phenomenon obeys laws of Reflec
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