Midpoint circle algorithm for scan converting a circle, Computer Graphics

Assignment Help:

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


Related Discussions:- Midpoint circle algorithm for scan converting a circle

Functioning of input devices - 2d shape primitives, Functioning of Input De...

Functioning of Input Devices Functioning of input devices-Keyboard, mouse, trackball and space ball, Joystick, data glove, digitizer, scanner, touch panel, light pen, voice sys

Intensity of colours - raster graphics and clipping, Similarly we can contr...

Similarly we can control the intensity of colours We contain more bit planes for all colour say three bit planes for R, 3 for G and 3 for B here all bit plane of size mxn, hen

Compare bresenham line generation algorithm with dda, 1. Compare Bresenham...

1. Compare Bresenham line generation with Digital Differential Analyzer line generation. Ans.   Bresenham line generation algorithm is better than Digital Differential Analyze

Describe and explain four features of firewire, QUESTION 1. Describe an...

QUESTION 1. Describe and explain four features of Firewire. 2. Explain clearly what is sampling rate and how does it influences the quality of video produced. 4. In Adobe

Ray tracing algorithm, Ray Tracing:  Ray t racing is the technique to dete...

Ray Tracing:  Ray t racing is the technique to determine which objects in the scene are visible.  In this to identify the visible surface for each pixel we continue to bounce the

Reflection and shear - output primitives, Reflection and Shear There ar...

Reflection and Shear There are a few important transformations which are not primitive in the sense that they can be expressed as compositions of translation, rotation and scal

Design a bitmap for the english vowels, 1. Design a bitmap for the English ...

1. Design a bitmap for the English vowels A, E, I, O, U for two different sizes and then implement the bitmaps to plot these vowels on the display. Keep in mind that baseline of al

Matrix for orthographic projection, Matrix for Orthographic Projection ...

Matrix for Orthographic Projection Orthographic projections are projections into one of the coordinate planes x=0, y=0or z=0. The matrix for orthographic projection on the z=0

Polygon meshes - modeling and rendering, Polygon Meshes - Modeling and Rend...

Polygon Meshes - Modeling and Rendering A polygonal surface to be sketched may not be easy and may have enormous curls and curves. Illustration: a crushed piece of paper or cr

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd