Computer Graphics using C - Lab record

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DEPARTMENT OF COMPUTER APPLICATIONS Page 1 Program no: 1

Date: 13/7/2013

ANIMATED SUNRISE

AIM:

Write a C program to draw animated sunrise. ALGORITHM:

Step 1: Start

Step 2: Initialize initgraph and graphics mode Step 3: Declare function mountain() and sun() Step 4: Call the below functions

i) sun() - Draw sun using the function circle() and animate it using for loop and function delay()

ii) mountain() - Draw mountain using function arc() and line() Step 5: Call cleardevice()

Step 6: closegraph() Step 7: Stop

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DEPARTMENT OF COMPUTER APPLICATIONS Page 2 PROGRAM: #include<stdio.h> #include<graphics.h> #include<conio.h> void main() { void sun(); void mountain(); int gd,gm; gd=DETECT; initgraph(&gd,&gm,"c:\\tc\\bgi"); mountain(); sun(); getch(); closegraph(); } void mountain() { line(0,300,200,147); arc(225,165,30,150,30); line(250,148,400,300); line(350,250,498,151); arc(527,175,43,137,36); line(553,150,640,250); } void sun() { int i,j,k,l; for(i=230,k=150;i>100;i--,k++) { setcolor(RED); for(j=30;j>0;j--) circle(340,i,j);

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DEPARTMENT OF COMPUTER APPLICATIONS Page 3 setcolor(BROWN); mountain(); setcolor(YELLOW); arc(k,250,20,180,6); arc(k-10,250,20,180,6); l=k+50; setcolor(BLUE); arc(l,150,20,180,6); arc(l-10,150,20,180,6); setcolor(5); arc(l+100,200,20,180,6); arc(l+90,200,20,180,6); arc(l+150,170,30,140,6); arc(l+140,170,30,140,6); delay(150); cleardevice(); } cleardevice(); setcolor(BROWN); mountain(); setcolor(YELLOW); for(i=30;i>0;i--) circle(340,90,i); }

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DEPARTMENT OF COMPUTER APPLICATIONS Page 4 OUTPUT

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DEPARTMENT OF COMPUTER APPLICATIONS Page 5 Program No: 2

Date: 17/7/2013

ANIMATED ROCKET LAUNCHING

AIM:

Write a C program to draw an animated rocket launching. ALGORITHM:

Step 1: Start

Step 2: Initialize intigraph and graphics mode

Step 3: Draw rocket using the function rectangle() and line() and animate it using for loop and function delay()

Step 4: Call cleardevice() Step 5: Closegraph() Step 6: Stop

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DEPARTMENT OF COMPUTER APPLICATIONS Page 6 PROGRAM: #include<stdio.h> #include<graphics.h> #include<conio.h> void main() { int d,m,i,y; clrscr(); d=DETECT; initgraph(&d,&m,"c:\\tc\\bgi"); for(y=10;y<=300;y=y+5) { rectangle(300,300-y,330,400-y); rectangle(290,400-y,340,420-y); line(315,260-y,300,300-y); line(315,260-y,330,300-y); setcolor(YELLOW); for(i=290;i<=340;i=i+3) line(i,420-y,i+3,440-y); setcolor(RED); delay(100); cleardevice(); } getch(); closegraph(); }

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DEPARTMENT OF COMPUTER APPLICATIONS Page 7 OUTPUT:

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Date: 21/7/2013

ANIMATED FLAG HOISTING

AIM:

Write a C program to draw an animated flag hoisting ALGORITHM:

Step 1: Start

Step 2: Declare the variables i,j,x1,x2,x3,y1,y2.

Step 3: Initialize j to 50,,i to 82,repeat the following steps until i>2. a) Check whether i>30,then decrement j by 1.

b) Set the fill pattern as solid fill.

c) Draw a polygon using polygon function.

d) Initialize x1=60,y1=100,x2=220,y2=140,x3=340,y3=180. e) Initialize i to 0 and execute the following.

i) Set the color as RED when(i<60)

ii) Set the color as WHITE if i value is between 60 and 120 iii)Draw an ellipse using ellipse function

f) Set the color as BLUE. g) Set x1=0,x2=15.

h) Initialize i to 0 and repeat the steps until i<24 i) Execute the pieslice function.

ii) Set x1=x1+15. iii)Set x2=x2+15.

iv) Call the delay() and cleardevice() Step 4: Stop.

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DEPARTMENT OF COMPUTER APPLICATIONS Page 9 PROGRAM: #include<stdio.h> #include<graphics.h> #include<conio.h> int back[10]={59,80,59,480,54,480,54,80,59,80}; void main() { int i,j,x1,x2,x3,y1,y2,y3,r1,r2,k,l,gd,gm; clrscr(); gd=DETECT; initgraph(&gd,&gm,"c:\\tc\\bgi"); for(k=50,l=82;l>2;l--) { cleardevice(); if(l>30)k--; setfillstyle(9,BROWN); fillpoly(5,back); x1=60;y1=100;x2=220;x3=340;y2=140;y3=180; for(i=0;i<180;i++) { if(i<60) setcolor(RED); if(i>60&&i<120) setcolor(WHITE); if(i>120) setcolor(GREEN); ellipse(x1,y1-20+l,0,90,100-k,3+l); ellipse(x2-2*k,y1-20+l,180,270,60-k,3+l); ellipse(x2-2*k,y2-53+3*l,0,90,60-k,3+l); ellipse(x3-4*k,y2-52+3*l,180,270,60-k,3+l); ellipse(x3-4*k,y3-86+5*l,0,90,60-k,3+l);

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DEPARTMENT OF COMPUTER APPLICATIONS Page 10 y1++;y2++;y3++; } setcolor(BLUE); setfillstyle(1,15); x1=0;x2=15; for(i=0;i<24;i++) { pieslice(220-2*k,210-37+2*l,x1,x2,30-k/2); x1=x1+15; x2=x2+15; } } getch(); }

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Date: 25/7/2013

ROTATING FAN

AIM:

Write a C program to draw a rotating fan and control its speed. ALGORITHM:

Step 1: Start

Step 2: Declare function drawfan() to draw fan using bar() and pieslice() function Step 3: Declare function switch_on() to change the speed using delay()

Step 4: Initialize initgraph and graphics mode Step 5: Call cleardevice()

Step 6: Call drawfan()

Step 7: Using switch case call switch_on() function Step 8: Closegraph()

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DEPARTMENT OF COMPUTER APPLICATIONS Page 13 PROGRAM: #include<stdio.h> #include<conio.h> #include<graphics.h> #include<math.h> void drawfan(int,int); void Switch(int); void main() { int speed; int gd=DETECT,gmode; initgraph(&gd,&gmode,"c:\\tc\\bgi"); do { cleardevice(); drawfan(0,15); gotoxy(30,5); printf("\n1.Slow"); printf("\n2.MEdium"); printf("\n3.Fast"); printf("\n4.OFF");

printf("\n Enter the choice"); scanf("%d",&speed) ; switch(speed) { case 1:Switch(300); break; case 2:Switch(100); break; case 3:Switch(50); break;

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DEPARTMENT OF COMPUTER APPLICATIONS Page 14 } }while(speed!=4); getch(); closegraph(); }

void drawfan(int rotate,int color) { int i; setfillstyle(SOLID_FILL,WHITE); setcolor(color); bar(313,240,317,320); bar(300,320,330,330); setfillstyle(SOLID_FILL,RED); pieslice(315,240,0+rotate,40+rotate,35); pieslice(315,240,120+rotate,160+rotate,35); pieslice(315,240,240+rotate,280+rotate,35); setcolor(YELLOW); for(i=0;i<39;i+=3) circle(315,240,i); } void Switch(speed) { int i=0; for(i=0;i<=1400;i+=80) { drawfan(i,0); drawfan(i+80,15); delay(speed); }}

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DEPARTMENT OF COMPUTER APPLICATIONS Page 15 OUTPUT: ELECTRIC FAN 1. SLOW 2. MEDIUM 3. FAST 4. EXIT

Enter the choice: 1

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Date: 29/7/2013

CHESS BOARD

AIM:

Write a C program to draw a chess board. ALGORITHM:

Step 1: Start

Step 2: Initialize graphics components Step 3: Declare variables flag,x,y,i,j Step 4: Initialize flag=0

Step 5: Repeat steps 6 to 11 from i=0 to 8 Step 6: Repeat steps 7 to 10 from j=0 to 8

Step 7: Draw rectangle with arguements 50+x,50+y,100+x,100+y Step 8: Check whether flag%2=0,then set color to white else set to black Step 9: Fill the rectangle

Step 10:Increment flag,set x=x+50 Step 11:Increment flag,set y=y+50 Step 12:Stop

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DEPARTMENT OF COMPUTER APPLICATIONS Page 17 PROGRAM: #include<stdio.h> #include<graphics.h> #include<conio.h> void main() { int flag=0,x,y,i,j,gd,gm; clrscr(); gd=DETECT; initgraph(&gd,&gm,"c:\\tc\\bgi"); for(i=0,y=0;i<8;i++) { for(j=0,x=0;j<8;j++) { rectangle(50+x,50+y,100+x,100+y); if(flag%2==0) setfillstyle(1,WHITE); else setfillstyle(1,BLACK); flag++; floodfill(52+x,52+y,15); x=x+50; } flag++; y=y+50; } getch(); closegraph(); }

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Date: 4/8/2013

FLIGHT TAKEOFF & LANDING

AIM:

Write a C program to draw the takeoff and landing of a flight. ALGORITHM:

Step1: Declare a function name plane with two arguments. Step2: Declare the variables i and initialize j=0

Step3: Declare the graphics driver and graphics mode. Step4: Initialize the graphic function.

Step5: Set a loop and call the plane function for take off animation. Step6: Set a loop and call the plane function for landing animation. Step7: Set the suitable color using setfillstyle() function.

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DEPARTMENT OF COMPUTER APPLICATIONS Page 20 PROGRAM: #include<stdio.h> #include<conio.h> #include<graphics.h> void plane(int,int); void main() { int i,j=0; int gd=DETECT,gmode; initgraph(&gd,&gmode,"c:\\tc\\bgi"); for(i=0;i<50;i++) { plane(0,0); delay(100); } for(i=0;i<400;i+=2) { cleardevice(); plane(i,j); delay(75); j=j++; } for(i=0;i<500;i+=2) {cleardevice(); plane(i-300,j); j--; delay(75); } getch(); closegraph(); }

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DEPARTMENT OF COMPUTER APPLICATIONS Page 21 { int body[]={50,400,200,400,150,380,70,380,30,300,50,400} ; int w1[]={120,380,140,380,120,450,110,450,120,380} ; int w2[]={120,380,140,380,120,330,110,330,120,380}; body[0]=50+i; body[1] =400-j; body[2]=200+i; body[3]=400-j; body[4]=150+i; body[5] =380-j; body[6]=70+i; body[7] =380-j; body[8]=30+i; body[9] =300-j; body[10]=50+i; body[11]=400-j; w1[0]=120+i; w1[1]=380-j; w1[2]=140+i; w1[3]=380-j; w1[4]=120+i; w1[5]=450-j; w1[6]=110+i; w1[7]=450-j; w1[8]=120+i; w1[9]=380-j; w2[0]=120+i; w2[1]=380-j; w2[2]=140+i; w2[3]=380-j; w2[4]=120+i; w2[5]=330-j; w2[6]=110+i; w2[7]=330-j; w2[8]=120+i; w2[9]=380-j; setfillstyle(SOLID_FILL,BLACK); setcolor(RED); drawpoly(6,body); setcolor(YELLOW); drawpoly(5,w1); drawpoly(5,w2); setcolor(RED); setcolor(GREEN); fillpoly(6,body); }

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Date: 7/8/2013

TEXT ANIMATION

AIM:

Write a C program to animate text. ALGORITHM:

Step 1: Start.

Step 2: Declare and initialize variables such as word,fname,style,size. Step 3: Initialize graphics driver and initgraph.

Step 4: Read the input string.

Step 5: Store the font style in an array.

Step 6: Print input string in different font style stored in the array. Step 7: Call cleardevice().

Step 8: Call closegraph(). Step 9: Stop.

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DEPARTMENT OF COMPUTER APPLICATIONS Page 24 PROGRAM: #include<stdio.h> #include<conio.h> #include<graphics.h> void main() { char word[100];

char *fname[] = { "DEFAULT font","TRIPLEX font",

"SMALL font","SANS SERIF font","GOTHIC font"}; int style,midx,midy,size;

int gd=DETECT,gmode;

initgraph(&gd,&gmode,"c:\\tc\\bgi"); printf("Enter the Word");

gets(word);

midx = getmaxx() / 2; midy = getmaxy() / 2;

for (style=DEFAULT_FONT; style<=GOTHIC_FONT; style++) {

cleardevice();

if (style == TRIPLEX_FONT) size = 4;

settextstyle(style, HORIZ_DIR, size); outtextxy(midx, midy, fname[style]); setcolor(style); outtextxy(400,300,word); getch(); } getch(); closegraph(); }

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Date: 10/8/2013

DDA LINE DRAWING ALGORITHM

AIM:

Write a C program to draw a line using DDA Algorithm ALGORITHM:

Step 1: Read the end points of the line (X

a,Yb) and (Xb,Yb) Step 2: Set dx=X a-Xb and dy=Yb-Ya Step 3: X= X a, Y=Y a.

Step 4: If abs(dx)>abs(dy) then steps=abs(dx)

Else

Steps=abs(dy)

Step 5 : Assign X increment =dx/(float)steps Y increment =dy/(float)steps

Step 6 : Call function putpixel(abs(X),abs(Y),colour) Step 7 : Repeat following for k=1 to steps

begin: =X+X increment Y=Y+Y increment Putpixel(round(X),round(Y),colour) End: Step 8 : Stop.

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DEPARTMENT OF COMPUTER APPLICATIONS Page 27 PROGRAM: #include<stdio.h> #include<conio.h> #include<graphics.h> #include<math.h>

#define ROUND(a) ((int)(a+.5)) void linedda(int,int,int,int); void main()

{

int x1,y1,x2,y2;

int gd=DETECT,gmode; initgraph(&gd,&gmode,"C:\\TC\\BGI"); printf("Enter the end points");

scanf("%d%d%d%d",&x1,&y1,&x2,&y2); linedda(x1,y1,x2,y2);

getch(); closegraph(); }

void linedda(int x1,int y1,int x2,int y2) { int dx=x2-x1,dy=y2-y1,k,s; float xincrement,yincrement,x=x1,y=y1; if(abs(dx)>abs(dy)) { s=abs(dx); } else { s=abs(dy); } xincrement=dx/(float)s; yincrement= dy/(float)s; putpixel(ROUND(x),ROUND(y),5); for(k=0;k<s;k++) { x=x+xincrement; y=y+yincrement; putpixel(ROUND(x),ROUND(y),5); }}

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Enter the end points:

100 100 300 250

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Date: 14/8/2013

BRESENHAMS LINE DRAWING ALGORITHM

AIM:

Write a C program to draw a line using Bresenham’s Algorithm ALGORITHM:

Step 1: Start.

Step 2: Declare the variables xa,xb,ya,yb,dx,dy,flag,end,xend,yend,x,y,p,py. Step 3: Read the starting coordinates as (xa,ya) and ending coordinate as (xb,yb).

Step 4: set dx=xa-xb, dy=ya-yb, p=2*dy-dx, py=2*dx-dy, twody=2*dy, twodx=2*dx and twodydx=2*(dy-dx),twodxdy=2*(dx-dy)

Step 5: if dx > dy then check 5.1.if xa > xb, then

5.1.1 set x=xb, y=yb and xend=xa;

5.1.2.if ya > yb set flag =1 otherwise set flag=0. 5.2.if xa < xb,then

5.2.1. set x=xa, y=ya and xend=xb;

5.2.2. if yb > ya set flag =1 otherwise set flag=0. 5.3. Repeat following steps until x < xend

5.3.1. Put a pixel in (x,y). 5.3.2. Increment variable x by 1. 5.3.3. if p < 0 set p=p+twody. 5.3.4. Otherwise check

5.3.5. if flag=true, then set y=y+1

5.3.6. otherwise set y=y-1 and calculate p=p+twodydx. 5.4. go to step 7

Step 6 : if dy > dx then check 6.1.if ya < yb, then

6.1.1. set x=xa, y=ya and yend=yb;

6.1.2. if xa < yb set flag =1 otherwise set flag=0. 6.2.if ya > yb,then

6.2.1 set x=xb, y=yb and yend=ya;

6.2.2.if xb < xa set flag =1 otherwise set flag=0. 6.3. Repeat following steps until y < yend

6.3.1. Put a pixel in (x,y). 6.3.2. Increment variable y by 1. 6.3.3. if py < 0 set py=py+twodx. 6.3.4. Otherwise check

6.3.5.if flag=true, then set x=x+1

6.3.6. otherwise set x=x-1 and calculate py=py+twodxdy. Step 7: Stop.

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DEPARTMENT OF COMPUTER APPLICATIONS Page 30 PROGRAM: #include<stdio.h> #include<conio.h> #include<graphics.h> #include<math.h> void linebrhm(int,int,int,int); void main() { int x1,y1,x2,y2; int gd=DETECT,gmode; initgraph(&gd,&gmode,"C:\\TC\\BGI"); printf("Enter the end points");

scanf("%d%d%d%d",&x1,&y1,&x2,&y2); linebrhm(x1,y1,x2,y2);

void linebrhm(int x1,int y1,int x2,int y2) { float dx,dy,dxx,dyy,dxy,p,x,y,xEnd; dx=abs(x1-x2); dy=abs(y1-y2); p=2*dy-dx; dyy=2*dy; dxy=2*(dy-dx); if(x1>x2) { x=x1; y=y2; xEnd=x1;

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DEPARTMENT OF COMPUTER APPLICATIONS Page 31 } else { x=x1; y=y1; xEnd=x2; } putpixel(x,y,5); while(x<xEnd) { x++; if(p<0) { p=p+dyy; } else { y++; p=p+dxy; } putpixel(x,y,5); } }

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Date: 19/8/2013

MIDPOINT – CIRCLE ALGORITHM

AIM:

Write a C program to draw a circle using Midpoint circle generating algorithm. ALGORITHM:

Step 1: Input radius r and circle center (X

C,YC) and obtain the first point on the circumference of a

circle centered on the origin as (X

0,Y0) = (0,r)

Step 2: Calculate the initial value of the decision parameter as P

0 = 5/4 – r

At each X

K position ,starting at k=0, perform the following test:

Step 3: If P

K<0, the next pont along the circle centered on (0,0) is

(X

K+1,Y)and PK+1 = PK + 2X(K+1) +1

Otherwise ,the next pont along the circle is (X

K+1,YK-1) and P K+1 = PK+ 2 XK+1+1 – 2 YK+1

Where 2 X

K+1 = 2 XK+2 and 2 YK+1 = 2 YK -2

Step 4: Determine symmetry points in the other seven octants

Step 5: Move each calculated pixel position (X,Y) on the circle path centered on (X

CYC) and plot the co-ordinate values X =X +XC ,Y = Y+YC

Step 6: Repeat steps 3 through 5 until X≥Y. Step 7: Stop

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DEPARTMENT OF COMPUTER APPLICATIONS Page 34 PROGRAM: #include<graphics.h> #include<conio.h> #include<math.h> #include<stdio.h> #include<stdlib.h>

#define ROUND(a) ((int)(a+0.5)) void circlemid(int xc,int yc,int r); void circlepts(int,int,int,int); void main()

{

int gd=DETECT,gmode,xc,yc,r; initgraph(&gd,&gmode,"c:\\tc\\bgi"); printf("Enter the center and radius"); scanf("%d%d%d",&xc,&yc,&r); circlemid(xc,yc,r);

void circlemid(int x0,int y0,int r) { int x,y,p; x=0; y=r; p=1-r; circlepts(x0,y0,x,y); while(x<y) { if(p<0) { p=p+2*(x+1)+1;

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DEPARTMENT OF COMPUTER APPLICATIONS Page 35 x++; } else { p=p+2*(x+1)+1-2*(y-1); x++; y--; } circlepts(x0,y0,x,y); }}

void circlepts(int x0,int y0,int x,int y) { putpixel(x0+x,y0+y,6); putpixel(x0+y,y0+x,6); putpixel(x0-x,y0+y,6); putpixel(x0-y,y0+x,6); putpixel(x0+x,y0-y,6); putpixel(x0+y,y0-x,6); putpixel(x0-x,y0-y,6); putpixel(x0-y,y0-x,6); }

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Enter the center and radius x: 300

y: 200 r: 50

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Date: 24/8/2013

FLOOD FILL ALGORITHM

AIM:

Write a C program to fill a polygon using Flood fill algorithm ALGORITHM:

Step 1: Start

Step 2: Declare the variables x,y,old,fill and the function floddfill() Step 3:Read the old color and the fill color

3.1) Draw the circle and fill it with the specified old color 3.2) Get the color of the current pixel

3.3) if the current pixel!= fill color then putpixel(x,y,fillcolor)

call floodfill(x-1,y,fillcolor,oldcolor) recursively call floodfill(x+1,y,fillcolor,oldcolor) recursively call floodfill(x,y-1,fillcolor,oldcolor) recursively call floodfill(x,y+1,fillcolor,oldcolor) recursively Step 4: Stop

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DEPARTMENT OF COMPUTER APPLICATIONS Page 38 PROGRAM: #include<graphics.h> #include<conio.h> #include<stdio.h> void floodfill1(int,int,int); void floodfill4(int,int,int,int); int x,y; int fill,old; void main() { int gd=DETECT,gm; initgraph(&gd,&gm,"c:\\tc\\bgi"); floodfill1(x,y,old); getch(); closegraph(); }

void floodfill1(int x,int y,int old) {

printf("Enter the coordinates"); scanf("%d%d",&x,&y);

printf("Enter the fill color and the old color"); scanf("%d%d",&fill,&old); setcolor(old); circle(x,y,30); setfillstyle(1,old); floodfill(x,y,old); floodfill4(x,y,fill,old); }

void floodfill4(int x,int y,int fill,int old) {

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DEPARTMENT OF COMPUTER APPLICATIONS Page 39 if(getpixel(x,y)==old) { putpixel(x,y,fill); floodfill4(x,y-1,fill,old); floodfill4(x-1,y,fill,old); floodfill4(x,y+1,fill,old); floodfill4(x+1,y,fill,old); } }

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Enter the co-ordinates: 300

200

Enter the fill color and the old color

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Date: 29/8/2013

2D- TRANSILATION

AIM:

Write a C program to transilate a 2D object. ALGORITHM:

Step 1: Start

Step 2: Initialize initgraph() and graphics mode Step 3: Read the no of vertices

Step 4: Read the end points

Step 5: Draw the polygon using line to command from(x0,y0) to (xk,yk) and move the pixel to line end points(xk,yk)

Step 6: Repeat step 3 until the last pixel to initial and compute the polygon

Step 7: Now draw the lines from final pixel to initial pixel and compute the polygon Step 8: Input the transilate factors, tx and ty

Step 9: Obtain new end points as x’= x + tx y’= y + ty

Step 10: Repeat step 2 to step 6 to get the transilated position. Step 11: Call clear device function

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DEPARTMENT OF COMPUTER APPLICATIONS Page 42 PROGRAM: #include<graphics.h> #include<stdio.h> #include<conio.h> #include<math.h> void main() { int driver,mode,x[5],y[5],i,n; int tx,ty; clrscr(); driver=DETECT; initgraph(&driver,&mode,"c:\\tc\\bgi"); printf("Enter the no: of vertices:"); scanf("%d",&n);

for(i=0;i<n;i++) {

printf("\n Enter x[%d] y[%d]->",i+1,i+1); scanf("%d%d",&x[i],&y[i]); } setcolor(1); outtextxy(200,150,"Befor translation"); setcolor(1); moveto(x[0],y[0]); for(i=1;i<n;i++) { lineto(x[i],y[i]); } lineto(x[0],y[0]); getch();

printf("\n\n\n\n\n\n\n\n\n Enter the translation factors:"); scanf("%d%d",&tx,&ty);

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DEPARTMENT OF COMPUTER APPLICATIONS Page 43 for(i=0;i<n;i++) { x[i]=x[i]+tx; y[i]=y[i]+ty; } outtextxy(190,330,"After translation"); moveto(x[0],y[0]); for(i=1;i<n;i++) { lineto(x[i],y[i]); } lineto(x[0],y[0]); getch(); closegraph(); }

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Enter the no: of vertices: 3

Enter x[1] y[1]  315 90 Enter x[2] y[2] 210 290 Enter x[3] y[3] 410 290 BEFORE TRANSLATION

Enter the translation factors

50 30

AFTER TRANSLATION

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Date: 4/9/2013

2D- ROTATION

AIM:

Write a C program to rotate a 2D object with respect to orgin ALGORITHM:

Step 1: Start

Step 2: Initialize initgraph() and graphics mode Step 3: Declare the variables xr, yr, n, theta Step 4: For i=0 to n read x[i] and y[i] Step 5: Move to (x0,y0)

Step 6: For i=0 to n Step 7: Line to (x[i], y[i]) Step 8: Line to (x[0], y[0]) Step 9: Enter the pivot point

Step 10: For r= 0 to theta, obtain the new points

x1[i] = xr + (x[i] – xr) * cos(theta) – (y[i]-yr) * sin(theta) y1[i] = yr + (x[i] – xr) * sin(theta) + (y[i]-yr) * cos(theta) Step 11: Repeat step 4,5 and 6

Step 12: Call clear device function Step 13: Stop.

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DEPARTMENT OF COMPUTER APPLICATIONS Page 46 PROGRAM: #include<graphics.h> #include<stdio.h> #include<conio.h> #include<math.h> void main() { int driver,mode,x[5],y[5],x1[5],y1[5],xr,yr,i,n; float theta; clrscr(); driver=DETECT; initgraph(&driver,&mode,"c:\\tc\\bgi"); printf("Enter the no: of vertices:"); scanf("%d",&n);

for(i=0;i<n;i++) {

printf("\n Enter x[%d] y[%d]->",i+1,i+1); scanf("%d%d",&x[i],&y[i]); } setcolor(1); outtextxy(180,150,"Befor rotation"); setcolor(1); moveto(x[0],y[0]); for(i=1;i<n;i++) { lineto(x[i],y[i]); } lineto(x[0],y[0]); getch();

printf("\n\n\n\n\n\n\n\n\n Enter the rotation angle:"); scanf("%f",&theta);

(47)

DEPARTMENT OF COMPUTER APPLICATIONS Page 47 xr=getmaxx()/2; yr=getmaxx()/2; theta=(22.0/7.0)/180.0*theta; for(i=0;i<n;i++) { x1[i]=xr+(x[i]-xr)*cos(theta)-(y[i]-yr)*sin(theta); y1[i]=yr+(x[i]-xr)*sin(theta)+(y[i]-yr)*cos(theta); } outtextxy(190,330,"After rotation"); moveto(x1[0],y1[0]); for(i=1;i<n;i++) { lineto(x1[i],y1[i]); } lineto(x1[0],y1[0]); getch(); closegraph(); }

(48)

Enter the no: of vertices 3 Enter x[1] y[1]  315 90 Enter x[2] y[2] 290 210 Enter x[3] y[3]  415 290 BEFORE ROTATION Enter the rotation angle: 180

AFTER ROTATION

(49)

Date: 8/9/2013

2D SCALING

AIM:

Write a C program to scale a 2D object with respect to orgin ALGORITHM:

Step 1: Start

Step 2: Initialize initgraph() and graphics mode Step 3: Read the no of vertices

Step 4: Read the end points

Step 5: Draw the polygon using line to command from(x0,y0) to (xk,yk) and move the pixel to line end points(xk,yk)

Step 6: Repeat step 3 until the last pixel to initial and compute the polygon

Step 7: Now draw the lines from final pixel to initial pixel and compute the polygon Step 8: Input the scaling factors, sx and sy

Step 9: Obtain new end points as x’= x * sx y’= y * sy

Step 10: Repeat step 4 to step 8 to get the scaling position. Step 11: Call clear device function

(50)

DEPARTMENT OF COMPUTER APPLICATIONS Page 50 PROGRAM: #include<graphics.h> #include<stdio.h> #include<conio.h> #include<math.h> void main() { int driver,mode,x[5],y[5],i,n; int sx,sy,ch,xf,yf; clrscr(); driver=DETECT; initgraph(&driver,&mode,"c:\\tc\\bgi"); printf("enter the no: of vertices:"); scanf("%d",&n);

for(i=0;i<n;i++) {

printf("\n enter x[%d] y[%d]->",i+1,i+1); scanf("%d%d",&x[i],&y[i]);

}

printf("\nenter the Scaling factors:"); scanf("%d%d",&sx,&sy);

do {

printf("\n1.At orgin\n2.Fixed point\n3.exit"); printf("Enter your choice");

scanf("%d",&ch); if(ch==1) { outtextxy(200,150,"before Scaling"); setcolor(1); moveto(x[0],y[0]);

(51)

DEPARTMENT OF COMPUTER APPLICATIONS Page 51 for(i=1;i<n;i++) { lineto(x[i],y[i]); } lineto(x[0],y[0]); getch(); for(i=0;i<n;i++) { x[i]=x[i]*sx; y[i]=y[i]*sy; } outtextxy(100,100,"After Scaling"); moveto(x[0],y[0]); for(i=1;i<n;i++) { lineto(x[i],y[i]); } lineto(x[0],y[0]); getch(); } if(ch==2) {

printf("enter Th Fixed Point"); scanf("%d%d",&xf,&yf); for(i=0;i<n;i++) { x[i]=xf+((x[i]-xf)*sx); y[i]=yf+((y[i]-yf)*sy); } outtextxy(100,80,"before Scaling"); setcolor(1);

(52)

DEPARTMENT OF COMPUTER APPLICATIONS Page 52 moveto(x[0],y[0]); for(i=1;i<n;i++) { lineto(x[i],y[i]); } lineto(x[0],y[0]); getch(); outtextxy(100,100,"After Scaling"); moveto(x[0],y[0]); for(i=1;i<n;i++) { lineto(x[i],y[i]); } lineto(x[0],y[0]); getch(); } } while(ch!=3); getch(); closegraph(); }

(53)

Enter the no: of vertices: 3

Enter x[1] y[1]  315 90 Enter x[2] y[2] 210 290 Enter x[3] y[3] 410 290 BEFORE SCALING

Enter the scaling factors

2 3

AFTER SCALING

(54)

Date: 14/9/2013

2D REFLECTION

AIM:

Write a C program to reflect a 2D object. ALGORITHM:

Step 1: Start

Step 2: Initialize initgraph() and graphics mode Step 3: Read choice

Step 4: Initialize a function to plot points Step 5: If ch=1 then

Do the reflection along X-axis

x1[i] = -x1[i] y1[i] = -y1[i]

Draw the reflected image If ch=2 then

Do the reflection along Y-axis

x1[i] = -x1[i] y1[i] = y[i]

Do the reflection along line Y = X

x1[i] = x[i] y1[i] = -y[i]

Do the reflection along the line Y = -X

x1[i] = x[i] y1[i] = -y[i]

Draw the reflected image Step 6: Call clear device function Step 7: Stop

(55)

DEPARTMENT OF COMPUTER APPLICATIONS Page 55 PROGRAM: #include<stdio.h> #include<conio.h> #include<graphics.h> void main() { int gd,gm,ch,dx,dy; clrscr(); detectgraph(&gd,&gm); initgraph(&gd,&gm,"C:\\tc\\bgi"); do { printf("\n1:X-axis,\n2:Y-axis,\n3:Y=X,\n4:Y=-X,\n5:Exit");

printf("\nEnter the choice of axis about which the object is to reflect:"); scanf("%d",&ch); clrscr(); line(0,250,600,250); line(300,0,300,500); rectangle(320,100,370,150); dx=320-300; dy=250-150; getch(); if(ch==1) {

outtextxy(50,50,"REFLECTION ABOUT X-axis"); rectangle(320,100+2*dy,370,150+2*dy);

}

if(ch==2) {

outtextxy(50,50,"REFLECTION ABOUT Y-axis"); rectangle(320-2*dx-50,100,370-2*dx-50,150);

(56)

DEPARTMENT OF COMPUTER APPLICATIONS Page 56 }

if(ch==3) {

outtextxy(50,50,"REFLECTION ABOUT Y=X-axis"); rectangle(340+50,100+50,390+50,150+50);

}

if(ch==4) {

outtextxy(50,50,"REFLECTION ABOUT Y=-X-axis"); rectangle(100,320,150,370); } } while(ch!=5); getch(); }

(57)

Enter the choice of axis about which the object is to reflect:

1. X – axis 2. Y – axis 3. X = Y 4. Y = -X 5. Exit

1

Reflection about X-axis

2

(58)

DEPARTMENT OF COMPUTER APPLICATIONS Page 58 Enter the choice of axis about which the object is to reflect:

3

Reflection about Y=X

4

(59)

Date: 25/9/2013

2D SHEAR

AIM:

Write a C program to shear a 2D object. ALGORITHM:

Step 1: Start

Step 2: Initialize initgraph() and graphics mode Step 3: Read Choice

Step 4: Initialize a function to plot points Step 5: if ch=1 then

Read the shear parameter

Convert the translation parameters

Do the transformation along the shearing x’ = x + shx * y Draw the sheared image

if ch=2 then

Read the shear parameter

Convert the translation parameters

Do the transformation along the shearing y’ = y + shy * x Draw the sheared image

Step 6: Call clear device function Step 7: Stop

(60)

DEPARTMENT OF COMPUTER APPLICATIONS Page 60 PROGRAM: #include<stdio.h> #include<conio.h> #include<graphics.h> #include<process.h> void x_shear(float*,float*,int); void y_shear(float*,float*,int); void main() { float x1=100,y1=100,x2=200,y2=100,x3=200,y3=200,x4=100,y4=200; int c,gd,gm,sh;

printf("\n enter your choice\n (1) x-axis\n (2) y-axis"); scanf("%d",&c);

printf("enter the shear factor"); scanf("%d",&sh); detectgraph(&gd,&gm); initgraph(&gd,&gm,"c:\\tc\\bgi"); line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); getch(); if(c==1) { x_shear(&x1,&y1,sh); x_shear(&x2,&y2,sh); x_shear(&x3,&y3,sh); x_shear(&x4,&y4,sh); } if(c==2) {

(61)

DEPARTMENT OF COMPUTER APPLICATIONS Page 61 y_shear(&x1,&y1,sh); y_shear(&x2,&y2,sh); y_shear(&x3,&y3,sh); y_shear(&x4,&y4,sh); } outtextxy(50,50,"SHEARING"); line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x4,y4); line(x4,y4,x1,y1); getch(); }

void x_shear(float *x,float *y,int sh) {

(*x)=(*x)+sh*(*y); }

void y_shear(float *x,float*y,int sh) {

(*y)=(*y)+sh*(*x); }

(62)

Enter your choice 1. X- axis 2. Y-axis

1

Enter the shear factor 2

Enter your choice 1. X- axis 2. Y-axis

2

Enter the shear factor 1

(63)

Date: 28/9/2013

COHEN-SUTHERLAND LINE CLIPPING ALGORITHM

AIM:

Write a C program to implement Cohen-Sutherland Line Clipping Algorithm ALGORITHM:

Step 1: start

Step 2: consider the line segment p1, p2 Step 3: findout outcode of p1, p2

Step 4: enter into a loop Step 5: loop

if both outcode are zero, then display line segment exit the loop, return

else if both outcodes are non zero and their logical and # 0 than reject the line segment

exit the loop, return

else if outcode (p1) =0 then swap (p1, p2) end-if

1) the most significant bit of outcode (p1)! =0, then find the point of intersection of the line segment with top boundary

2) the second most significant bit of outcode (p1)! =0,then find the point of intersection of the line segment with low boundary

3) the third most significant bit of outcode (p1)! =0,then find the point of intersection of the line segment with right boundary

4) the lower bit of outcode (p1)! =0,then find the point of intersection of the line segment with left boundary

step 6 replace the points p1 with the intersection point. Step 7. find the outcode

Step 8. Enter the loop. step 9. Stop

(64)

DEPARTMENT OF COMPUTER APPLICATIONS Page 64 PROGRAM: #include<stdio.h> #include<graphics.h> #include<conio.h> #define TRUE 1 #define FALSE 0

typedef unsigned int outcode; enum { TOP=0X1,BOTTOM=0X2,RIGHT=0X4,LEFT=0X8 }; void lineclip(int,int,int,int,int,int,int,int); int compoutecode(int,int,int,int,int,int); void main() { int xmin,ymin,xmax,ymax,x0,y0,x1,y1; int gd=DETECT,gmode; initgraph(&gd,&gmode,"C:\\TC\\BGI"); printf("enter the co-ordinates of the window");

scanf("%d%d%d%d",&xmin,&ymin,&xmax,&ymax); printf("\nenter theco-ordinates of the line");

scanf("%d%d%d%d",&x0,&y0,&x1,&y1); printf("\nbefore clipping"); rectangle(xmin,ymin,xmax,ymax); line(x0,y0,x1,y1); getch(); closegraph(); initgraph(&gd,&gmode,"C:\\TC\\BGI"); printf("\n\n\nafter clipping"); rectangle(xmin,ymin,xmax,ymax); lineclip(x0,y0,x1,y1,xmin,xmax,ymin,ymax);

(65)

DEPARTMENT OF COMPUTER APPLICATIONS Page 65 getch();

closegraph(); }

void lineclip(int x0,int y0,int x1,int y1,int xmin,int xmax,int ymin,int ymax) { outcode outcode0,outcode1,outcodeout; int accept=FALSE,done=FALSE,x,y; outcode0=compoutecode(x0,y0,xmin,xmax,ymin,ymax); outcode1=compoutecode(x1,y1,xmin,xmax,ymin,ymax); do { if(!(outcode0|outcode1)) { accept=TRUE; done=TRUE; } else if(outcode0&outcode1) { done=TRUE; } else { if(outcode0) { outcodeout=outcode0; } else { outcodeout=outcode1; } if(outcodeout&TOP) {

(66)

DEPARTMENT OF COMPUTER APPLICATIONS Page 66 x=x0+(x1-x0)*(ymax-y0)/(y1-y0); y=ymax; } else if(outcodeout&BOTTOM) { x=x0+(x1-x0)*(ymin-y0)/(y1-y0); y=ymin; } else if(outcodeout&RIGHT) { y=y0+(y1-y0)*(xmax-x0)/(x1-x0); x=xmax; } else { y=y0+(y1-y0)*(xmin-x0)/(x1-x0); x=xmin; } if(outcodeout==outcode0) { x0=x; y0=y; outcode0=compoutecode(x0,y0,xmin,xmax,ymin,ymax); } else { x1=x; y1=y; outcode1=compoutecode(x1,y1,xmin,xmax,ymin,ymax); } } }while(done==FALSE);

(67)

DEPARTMENT OF COMPUTER APPLICATIONS Page 67 if(accept) { line(x0,y0,x1,y1); } }

int compoutecode(int x,int y,int xmin,int xmax,int ymin,int ymax) { outcode code=0; if(y>ymax) { code=code|TOP; } else if(y<ymin) { code=code|BOTTOM; } if(x>xmax) { code=code|RIGHT; } else if(x<xmin) { code=code|LEFT; } return code; }

(68)

BEFORE CLIPPING

(69)

Date: 1/10/2013

SUTHERLAND-HODEGEMAN POLYGON CLIPPING

AIM:

Write a C program to implement Sutherland-Hodegeman polygon clipping ALGORITHM:

Step 1: Start

Step 2: Read the vertices of the polygon

Step 3: Draw the polygon and the window before clipping Step 4: Clip a polygon against each window boundary

i. clip the polygon with left boundary then pass the parameters to the right clip ii. Clip the polygon with right boundary then pass the parameters to the bottom clip

iii. Clip the polygon with bottom boundary then pass the parameters to the top clip iv. Clip the polygon with top boundary then pass the parameters to the saved clip point procedure

Step 5: Do the step 4 for the vertex of the polygon Step 6: Draw the polygon and the window after clipping. Step 7: Stop

(70)

DEPARTMENT OF COMPUTER APPLICATIONS Page 70 PROGRAM: #include<stdio.h> #include<graphics.h> #include<conio.h> #define FALSE 0 #define TRUE 1

typedef unsigned int outcode;

enum{TOP=0x1,BOTTOM=0x2,RIGHT=0x4,LEFT=0x8}; void CohenSutherlandLineClipAndDraw(int,int,int,int,int,int,int,int); int compoutcode(int,int,int,int,int,int); void main() { int n,i,x[10],y[10],xmin,ymin,xmax,ymax; int gd=DETECT,gmode; initgraph(&gd,&gmode,"c:\\tc\\bgi");

printf("enter the number of vertices of the polygen"); scanf("%d",&n);

printf("\nEnter the points"); for(i=0;i<n;i++)

{

scanf("%d%d",&x[i],&y[i]); }

printf("\nEnter the point of the clipping rectangle"); scanf("%d%d%d%d",&xmin,&ymin,&xmax,&ymax); clearviewport(); for(i=0;i<n-1;i++) { line(x[i],y[i],x[i+1],y[i+1]); } line(x[i],y[i],x[0],y[0]); setcolor(8);

(71)

DEPARTMENT OF COMPUTER APPLICATIONS Page 71 rectangle(xmin,ymin,xmax,ymax); getch(); clearviewport(); for(i=0;i<n-1;i++) CohenSutherlandLineClipAndDraw(x[i],y[i],x[i+i],y[i+1],xmin,xmax,ymin,ymax); CohenSutherlandLineClipAndDraw(x[i],y[i],x[0],y[0],xmin,xmax,ymin,ymax); rectangle(xmin,ymin,xmax,ymax); getch(); closegraph(); }

void CohenSutherlandLineClipAndDraw(int x0,int y0,int x1,int y1,int xmin,int xmax,int ymin,int ymax) { outcode outcode0,outcode1,outcodeout; int accept=FALSE,done=FALSE; int x,y; outcode0=compoutcode(x0,y0,xmin,xmax,ymin,ymax); outcode1=compoutcode(x1,y1,xmin,xmax,ymin,ymax); do { if(!(outcode0|outcode1)) { accept=TRUE; done=TRUE; }

else if(outcode0 & outcode1) done=TRUE; else { if(outcode0) outcodeout=outcode0; else

(72)

DEPARTMENT OF COMPUTER APPLICATIONS Page 72 outcodeout=outcode1; if(outcodeout&TOP) { x=x0+(x1-x0)*(ymax-y0)/(y1-y0); y=ymax; }

else if(outcodeout & BOTTOM) {

x=x0+(x1-x0)*(ymin-y0)/(y1-y0); y=ymin;

}

else if(outcodeout & RIGHT) { y=y0+(y1-y0)*(xmax-x0)/(x1-x0); x=xmax; } else { y=y0+(y1-y0)*(xmin-x0)/(x1-x0); x=xmin; } if(outcodeout==outcode0) { x0=x; y0=y; outcode0=compoutcode(x0,y0,xmin,xmax,ymin,ymax); } else { x1=x; y1=y; outcode1=compoutcode(x1,y1,xmin,xmax,ymin,ymax);

(73)

DEPARTMENT OF COMPUTER APPLICATIONS Page 73 } } }while(done==FALSE); if(accept) line(x0,y0,x1,y1); }

int compoutcode(int x,int y,int xmin,int xmax,int ymin,int ymax) { outcode code=0; if(y>ymax) code=code|TOP; else if(y<ymin) code=code|BOTTOM; if(x>xmax) code=code|RIGHT; else if(x<xmin) code=code|LEFT; return code; }

(74)

Enter the number of vertices 3

Enter the coordinates

200 280 300 200 100 200

Enter the points of the clipping rectangle

150 180 200 300

BEFORE CLIPPING

(75)

Date: 3/10/2013

PIE CHART

AIM:

Write a C program to draw a pie chart ALGORITHM:

Step 1: Start

Step 2: Initialize initgaraph and graphics mode Step 3: Get the number of cities,n

Step 4: Get the cityname temperature of n cities Step 5: Draw barchart and piechart

(76)

DEPARTMENT OF COMPUTER APPLICATIONS Page 76 PROGRAM: #include<stdio.h> #include<conio.h> #include<graphics.h> #include<process.h> #include<dos.h> void main() { char *pa=0; int i,j,ii,jj,n,t[50],d=0; int pnew[50]={0},poId=0; float tot=0; char a[50]; int gd,gm; gd=DETECT; initgraph(&gd,&gm,"C:\\TC\\BGI"); printf("ENTER DETAILS "); printf("\n---"); printf("1.NO OF CITIES: "); scanf("%d",&n); for(i=0;i<n;i++) { printf("ENTER DETAILS "); printf("\n---");

printf("\n1. NAME OF CITY :"); scanf("%s",&a[i]); printf("\nTEMPERATURE :"); scanf("%d",&t[i]); } cleardevice(); line(50,400,50,100); line(50,400,350,400); for(i=0;i<300;i=i+30)

(77)

DEPARTMENT OF COMPUTER APPLICATIONS Page 77 { putpixel(50+i,400,5); putpixel(50+i,399,5); putpixel(50+i,401,5); putpixel(50,400-i,5); putpixel(50,400-i,5); putpixel(49,400-i,5); putpixel(51,400-i,5); } for(i=0;i<n;i++) { int nn=3*t[i]; setcolor(i+2); for(j=0;j<nn;j++) line(60+d,400-j,80+d,400-j); *pa=a[i]; outtextxy(68+d,405,pa); d=d+30; tot=tot+t[i]; } setcolor(WHITE); for(i=0;i<n;i++) { setfillstyle(1,i+2); pnew[i]=poId+((t[i]*100)/tot)*3.60; if(i==n-1)pnew[i]=360; pieslice(500,240,poId,pnew[i],100); poId=pnew[i]; } getch(); }

(78)

DEPARTMENT OF COMPUTER APPLICATIONS Page 78 OUTPUT: Enter details --- No: of cities 2 Enter details ---

1. Name of the city Trivandrum 2. Temperature

40 Enter details ---

1. Name of the city Kollam

2. Temperature 60

(79)

Date: 5/10/2013

SIMULATION OF THE CLOCK

AIM:

Write a C program to draw the simulation of the clock ALGORITHM:

Step 1: Declare the graphics driver and graphicsmode.

Step 2: Declare an array a[12] with values 1 to 12 and integer variables a,b and i. Step 3: Initialize the graphics using the initgraph() function.

Step 4: Using the circle(),outtext () fuctions to draw a clock shaped figure. Step 5: Perform animation of the clock.

(80)

DEPARTMENT OF COMPUTER APPLICATIONS Page 80 PROGRAM: #include<stdio.h> #include<conio.h> #include<graphics.h> #include<dos.h> #include<math.h>

#define arg_sec M_PI/30 #define arg_hour M_PI/6 #define arg_min M_PI/360 void main()

{

int gd=DETECT,gm,sec=0,hour,min,x1=0,y1=0,x2=0,y2=0,x3=0,y3=0; char *k[12]={"1","2","3","4","5","6","7","8","9","10","11","12"}; int a,b,i; int dig_sec;

char Time_Dig[14]; struct time t; initgraph(&gd,&gm,"C:\\TC\\BGI"); setcolor(RED); circle(300,200,200); circle(300,200,180); setfillstyle(1,RED); floodfill(300,390,RED); for(i=1;i<13;i++) { a=160*cos(arg_hour*i-M_PI_2); b=160*sin(arg_hour*i-M_PI_2); outtextxy(a+300,b+200,k[i-1]); } while(!kbhit()) { setcolor(BLACK); line(300,200,x1+300,y1+200); line(300,200,x2+300,y2+200); line(300,200,x3+300,y3+200); gettime(&t); hour=t.ti_hour;

(81)

DEPARTMENT OF COMPUTER APPLICATIONS Page 81 sec=t.ti_sec; min=t.ti_min; Time_Dig[0]=hour/10+48; Time_Dig[1]=hour%10+48; Time_Dig[2]=':'; Time_Dig[3]=min/10+48; Time_Dig[4]=min%10+48; Time_Dig[5]=':'; Time_Dig[6]=sec/10+48; Time_Dig[7]=sec%10+48; Time_Dig[8]='\0'; outtextxy(270,250,""); x1=150*cos(arg_sec*sec-M_PI_2)*0.98; y1=150*sin(arg_sec*sec-M_PI_2)*0.98; x2=150*cos(arg_sec*min-M_PI_2)*0.9; y2=150*sin(arg_sec*min-M_PI_2)*0.9; if(hour>12) hour-=12; x3=150*cos(arg_hour*hour-M_PI_2+arg_min*min)*0.6; y3=150*sin(arg_hour*hour-M_PI_2+arg_min*min)*0.6; setcolor(YELLOW); line(300,200,x1+300,y1+200); setcolor(CYAN); line(300,200,x2+300,y2+200); setcolor(WHITE); line(300,200,x3+300,y3+200); setcolor(YELLOW); outtextxy(270,250,Time_Dig); delay(50); } getch(); closegraph(); restorecrtmode(); }

(82)

(83)

Date: 9/10/2013

BICYCLE RIDING

AIM:

Write a C program to draw a person riding a bicycle ALGORITHM:

Step 1: Start

Step 2: Initialize the graphics driver and initgraph. Step 3: Declare a function cycle

3.1: Draw the figure of a man riding bicycle using inbuilt function such as line(),circle() Step 4: Animate the man and cycle

Step 5: Call cleardevice(). Step 6: Call closegraph(). Step 7: Stop.

(84)

DEPARTMENT OF COMPUTER APPLICATIONS Page 84 PROGRAM: #include<graphics.h> #include<stdio.h> #include<conio.h> void cycle() { int i; int body[]={450,260,490,190,520,250,570,200,490,190}; int human[]={565,190,575,190,570,150,566,150,566,147, 563,147,563,150,560,150,565,190}; for(i=0;i<=700;i+=5) { cleardevice(); body[0]=450-i; body[1]=260; body[2]=490-i; body[3]=190; body[4]=520-i; body[5]=250; body[6]=570-i; body[7]=200; body[8]=490-i; body[9]=190; human[0]=565-i; human[1]=190; human[2]=575-i; human[3]=190; human[4]=570-i; human[5]=150; human[6]=566-i; human[7]=150; human[8]=566-i; human[9]=147; human[10]=563-i; human[11]=147; human[12]=563-i; human[13]=150; human[14]=560-i; human[15]=150; human[16]=565-i; human[17]=190; setcolor(WHITE);

circle(450-i,260,20); //front wheel circle(450-i,260,3); // front wheel circle(600-i,260,20);//back wheel

(85)

DEPARTMENT OF COMPUTER APPLICATIONS Page 85 circle(600-i,260,3); //back wheel

circle(520-i,250,7); //pedal circle(520-i,250,3); //pedal

line(520-i,258,600-i,262);//lower chain line(520-i,242,600-i,258);//upper chain line(570-i,200,600-i,260); //back stay line(490-i,190,505-i,170);//handle line(490-i,160,520-i,180);//handle // seat line(570-i,200,570-i,195); line(565-i,190,565-i,195); line(565-i,195,575-i,195); line(575-i,195,575-i,190); setcolor(RED); line(520-i,250,530-i,255); line(520-i,250,510-i,245); setcolor(WHITE);

line(520-i,180,525-i,175); //handle node line(493-i,160,498-i,155); setcolor(LIGHTRED); line(565-i,190,520-i,220); line(520-i,220,510-i,245); line(575-i,190,533-i,230); line(533-i,230,530-i,255); setcolor(LIGHTRED); line(566-i,150,540-i,185);//hand1 line(540-i,185,527-i,175); line(563-i,150,530-i,165);//hand 2 line(530-i,165,498-i,155); setfillstyle(SOLID_FILL,RED); setcolor(LIGHTRED); circle(564-i,140,5);//head

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DEPARTMENT OF COMPUTER APPLICATIONS Page 86 setcolor(WHITE); drawpoly(5,body); setcolor(LIGHTRED); drawpoly(9,human); delay(180); } } void main() { int gd=DETECT,gmode; int x; initgraph(&gd,&gmode,"c:\\tc\\bgi"); cycle(); getch(); closegraph(); }

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