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Page Name: MIDPOINT CIRCLE DRAWING ALGORITHM


Posted by: project ideas
Created at: Friday 06th of July 2012 05:16:38 AM
Last Edited Or Replied at :Friday 06th of July 2012 05:16:38 AM
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MIDPOINT CIRCLE DRAWING ALGORITHM



To write a C program to draw a circle using Bresenham’s algorithm.

Algorithm

Step 1:Input radius r and circle center(Xc, Yc)and obtain the first point on the circumference of a circle centered on the origin as (X0, Y0) = (0, r)
Step 2: Calculate the initial values of the decision parameter as
P0 = 5/4 – r
Step 3: At each position starting at k perform the following test:
If Pk < 0, the next point to plot is (Xk+1, Yk) and
Pk+1 = Pk+2 Xk+1 + 1
Otherwise the n..................==> [ Click Here to Read More ]



Page Name: BRESENHAMS CIRCLE DRAWING ALGORITHM


Posted by: project helper
Created at: Wednesday 19th of December 2012 06:55:54 AM
Last Edited Or Replied at :Wednesday 19th of December 2012 06:55:54 AM
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BRESENHAM’S CIRCLE DRAWING ALGORITHM



ALGORITHM:
1. Start the program.
2. Declare the variables and initiate the graph.
3. To read the values of X-axis, Y-axis and radius co-ordinates.
4. Calculate the pixel position(x,y) onto the circular path(x1,y1)
5. Give the condition for drawing a circle whether x is less than y by using WHILE looping.
6. In the loop we put the pixel position in the path by incrementing or decrementing the position.
7. To calculate the value of the parameter by using if loop condition
..................==> [ Click Here to Read More ]



Page Name: Computer Graphics 4Bresenham Line Drawing Algorithm


Posted by: project source code cheker
Created at: Monday 23rd of July 2012 02:06:09 AM
Last Edited Or Replied at :Monday 23rd of July 2012 02:06:09 AM
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calculations

The Big Idea

Move across the x axis in unit intervals and at each step choose between two different y coordinates.
For example, from position (2, 3) we have to choose between (3, 3) and (3, 4)
We would like the point that is closer to the original line

Bresenham Exercise

Go through the steps of the Bresenham line drawing algorithm for a line going from (21,12) to (29,16)

Bresenham Line Algorithm Summary

The Bresenham line algorithm has the following advantages:
An fast incremental algorithm
Uses only integer calculations
Comparing this ..................==> [ Click Here to Read More ]



Page Name: MIDPOINT ELLIPSE DRAWING ALGORITHM


Posted by: project ideas
Created at: Friday 06th of July 2012 05:17:34 AM
Last Edited Or Replied at :Friday 06th of July 2012 05:17:34 AM
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oint to plot is (Xk+1, Yk) and
P1k+1 = P1k+2 r2yXk+1 + r2y
Otherwise the next point is (Xk+1, Yk-1) and
P1k+1 = P1k+2 r2yXk+1 - 2r2xYk+1 + r2y
With
2 r2yXk+1=2 r2yXk+ 2r2y
2r2xYk+1=2r2xYk- 2r2x
Step 4: Calculate the initial values of the decision parameter in region 2 as
P20 = r2y(X0+1/2)2+ r2x(Y0 – 1)2- r2x r2y
Step 5: At each position starting at Yk position in region 2, starting at k = 0,
perform the following test:
If P2k > 0, the next point to plot is (Xk, Yk-1) and
P2k+1 = P2k - 2 r2yYk+1 + r2x
Otherwise the next point is (Xk+1, Yk-1) and
P2k+1 = P2k - 2 r2yXk+1 - 2r2xYk+..................==> [ Click Here to Read More ]



Page Name: MIDPOINT CIRCLE DRAWING ALGORITHM


Posted by: project ideas
Created at: Friday 06th of July 2012 05:16:38 AM
Last Edited Or Replied at :Friday 06th of July 2012 05:16:38 AM
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MIDPOINT CIRCLE DRAWING ALGORITHM



To write a C program to draw a circle using Bresenham’s algorithm.

Algorithm

Step 1:Input radius r and circle center(Xc, Yc)and obtain the first point on the circumference of a circle centered on the origin as (X0, Y0) = (0, r)
Step 2: Calculate the initial values of the decision parameter as
P0 = 5/4 – r
Step 3: At each position starting at k perform the following test:
If Pk < 0, the next point to plot is (Xk+1, Yk) and
Pk+1 = Pk+2 Xk+1 + 1
Otherwise the n..................==> [ Click Here to Read More ]



Page Name: Bresenham Line Drawing Algorithm Circle Drawing Polygon Filling


Posted by: seminar topic helper
Created at: Saturday 16th of October 2010 08:59:24 AM
Last Edited Or Replied at :Saturday 16th of October 2010 08:59:24 AM
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Bresenham Line Drawing Algorithm Circle Drawing & Polygon Filling

Contents

In today’s lecture we’ll have a look at:
Bresenham’s line drawing algorithm
Line drawing algorithm comparisons
Circle drawing algorithms
A simple technique
The mid-point circle algorithm
Polygon fill algorithms
Summary of raster drawing algorithms

The Bresenham Line Algorithm

The Bresenham algorithm is another incremental scan conversion algorithm
The big advantage of this algorithm is that it uses only integer calculations

..................==> [ Click Here to Read More ]



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