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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
De Casteljau Algorithm For computation of Bézier curves an iterative algorithm known as de Casteljau algorithm is used. The algorithm uses repeated linear interpolation.
c/c++ program
Categories of Reflection - Ray Tracing Methods In order to achieve realism, such phenomenon of reflection, which occurs because of interaction of light and surface, is require
Light Wave 3D - Softwares for computer animation It is the other high end PC 3-D computer graphics software package. Originally established for the Amiga platform, it is now a
explain about gks
Sub Classes of Orthographic Projection There are three ordinary sub-classes of Orthographic (axonometric) projections as: 1) Isometric: The direction of projection makes
When you set up your project, create the class as an "ACM Graphics Program", rather than a plain class. This will perform the necessary preparations for you to use mouse input in y
Explain application areas of computer graphics in different areas. Early computer graphics has only certain special capabilities such as straight lines circles and ellipses
multimedia
Explain depth buffer method
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