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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
Define pixel and frame buffer? Pixel is shortened forms of picture element. Every screen point is referred to as pixel or pel. Picture definition is kept in a memory area c
The subsequent are also considered graphics applications as: • Paint Programs: Permit you to create rough freehand drawings. The images are saved as bit maps and can simply be
Write short notes on Text generation. OR Character Generation Techniques Character Generation Techniques Two different representations are used for storing computer fon
Algorithms for Basic Line Segment Plotting There are two important algorithms for basic line segment plotting-DDA algorithm and Bresenham algorithm. Both the algorithms use th
Ray Tracing - Polygon Rendering and Ray Tracing Methods Basically Ray tracing is an exercise that is performed to attain the realism in a scene. In easy way Ray Tracing is a w
Working of vecgen algorithm with diagram
what is vecgen algorithm and bresenham linequestion..
Line Generation Algorithms - Graphic Primitives In previous section we have discussed the case of frame buffer, here information regarding the image to be projected upon the
Hue and Saturation: A light source produced by a sun or electric bulb emits all frequencies within the visible range to give white light. When this light is incident upon an objec
Problems at Shared Vertices - Modeling and Rendering Shading discontinuities can arise while two adjacent polygons fail to share a vertex which lies along their common edge.
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