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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
explain about raster in cg
Enumerate the use of Data goggles- Virtual Reality Data goggles/helmets - These use optical systems and display screens which send 3D images to the eyes. Motion sensors mea
Q. What are Bezier cubic curves? Derive their properties. OR What are Bezier cubic curves? Derive these properties. Also show that the sum of the blending functions is identical
1. What do you understood by the term graphic primitives? Ans. Graphic primitives are the basic graphic objects that can be united in any number and method to produce a new i
interactive picture-construction techniques
Application Interlacing is utilized through all the analogue TV broadcast systems in recent use as: NTSC: 59.94 fields per second, 525 lines, still field drawn first
Containment Test - visible surface detection Test: That is Containment test: it can be either comprised (contained) or surrounding polygon, if intersection test fails. The
Describe interactive model of computer graphics and application areas of interactive computer graphics.
De Casteljeau algorithm: The control points P 0 , P 1 , P 2 and P 3 are combined with line segments termed as 'control polygon', even if they are not actually a polygon although
Question 1 Write a note on: Audio Spectrum & Audio Waveform Question 2 What is high dynamic range color? Explain gradient color Question 3 Describe Time-Remapping
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