The document outlines the steps for implementing a Digital Differential Analyzer (DDA) algorithm to draw lines by calculating differences between two endpoints and iteratively plotting pixels. It also mentions functions for drawing arcs, lines, circles, and ellipses in C programming, highlighting the syntax and example inputs. Key parameters such as the number of steps and increments for x and y coordinates are emphasized for precise drawing.

1. Digital Differential Analyzer
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2. DDA (digital differential analyzer) Algorithms:
Step 1: Get the input of two end points (x0, y0) and (x1, y1).
Step 2: Calculate the difference between two end points. dx = x1 - x0
dy = y1 -y0
Step 3: Based on the calculated difference in Step 2, you need to identify the number of steps
to put pixel. If dx > dy, then you need more steps in x coordinate; otherwise in y coordinate.
if (dx > dy)
Steps = absolute(dx);
else
Steps = absolute(dy);
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3. Step 4: Calculate the increment in x coordinate and y coordinate.
Xincrem ent = dx / (float) steps;
Yincrem ent = dy / (float) steps;
Step 5: Put the pixel by successfully incrementing x and y coordinates accordingly and complete the
drawing of the line.
for(int v=0; v < Steps; v++)
{
x = x + Xincrem ent; y = y + Yincrem ent; putpixel(x,y);
}
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5. Rainbow:
Functions Used:
 DELAY(N)
 SETCOLOR(N)
 ARC(X,Y,A1,A2,R)
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6. ARC FUNCTION IN C:
Input:
x=250, y=250, start_angle = 155, end_angle = 300, radius = 100
Output:
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7. Input:
x=250, y=250, start_angle = 0, end_angle = 300, radius = 100;
Output:
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8. Functions Used:
 LINE(X,Y, X1,Y1)
 CIRCLE(X, Y, RADIUS);
 ELLIPSE (X,Y, STANGLE, ENDANGLE, XRADIUS, YRADIUS)
 ARC(X,Y,A1,A2,R)
Man:
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