//2D TRANSFORMATION TRANSLATION, ROTATING AND SCALING. #include<stdio.h> #include<conio.h> #include<graphics.h> #include<math.h> #include<stdlib.

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1 //2D TRANSFORMATION TRANSLATION, ROTATING AND SCALING #include<stdio.h> #include<conio.h> #include<graphics.h> #include<math.h> #include<stdlib.h> void main() int gd=detect,gm,i,x[10],y[10],a,b,c,d,n,tx,ty,sx,sy,ch; float ang; initgraph(&gd,&gm,"c:\\tc\\bgi"); setbkcolor(white); printf("\n\tenter THE NUMBER OF SIDES:"); scanf("%d",&n); for(i=0;i<n;i++) printf("\n\nenter THE CO-ORDINATES FOR SIDE %d :",i+1); scanf("%d %d",&x[i],&y[i]); setcolor(magenta); for(i=0;i<n-1;i++) line(x[i],y[i],x[i+1],y[i+1]); line(x[n-1],y[n-1],x[0],y[0]);

2 getch(); do printf("\n1.translation\n2.rotation\n3.scaling\n4.exit"); printf("\n\tenter YOUR CHOICE:"); scanf("%d",&ch); switch(ch) case 1: cleardevice(); printf("\n\ttranslation\n ENTER TRANSLATION VECTOR:"); scanf("%d %d",&tx,&ty); setcolor(blue); for(i=0;i<n-1;i++) line(x[i]+tx,y[i]+ty,x[i+1]+tx,y[i+1]+ty); line(x[n-1]+tx,y[n-1]+ty,x[0]+tx,y[0]+ty); getch(); case 2: cleardevice(); printf("\n\trotation"); printf("\n\tenter THE ANGLE :"); scanf("%f",&ang); ang*=3.14/180;

3 getch(); setcolor(5); for(i=0;i<n-1;i++) a=x[i]*cos(ang)-y[i]*sin(ang)+150; b=x[i]*sin(ang)+y[i]*cos(ang); c=x[i+1]*cos(ang)-y[i+1]*sin(ang)+150; d=x[i+1]*sin(ang)+y[i+1]*cos(ang); line(a,b,c,d); a=x[n-1]*cos(ang)-y[n-1]*sin(ang)+150; b=x[n-1]*sin(ang)+y[n-1]*cos(ang); c=x[0]*cos(ang)-y[0]*sin(ang)+150; d=x[0]*sin(ang)+y[0]*cos(ang); line(a,b,c,d); getch(); case 3: cleardevice(); printf("\n\tscaling \n ENTER SCALING FACTOR :"); scanf("%d %d",&sx,&sy); setcolor(blue); for(i=0;i<n-1;i++) line(x[i]*sx,y[i]*sy,x[i+1]*sx,y[i+1]*sy);

4 line(x[n-1]*sx,y[n-1]*sy,x[0]*sx,y[0]*sy); getch(); case 4: exit(-1); while(ch<=4); 2. 2D-TRANSFORMATION PROGRAM:2 #include<stdio.h> #include<conio.h> #include<graphics.h> #include<math.h> #include<alloc.h> #include<stdlib.h> int n,i,p[20],q[20]; int convertx(int x); int converty(int y); void axis(void); void init(void); void share(void); void translate(void); void scaling(void);

5 void rotate(void); void reflect(void); void main( ) int ch, gd=detect,gm; initgraph(&gd,&gm,"e:\\tc\\bgi"); axis( ); printf("\b"); cleardevice( ); printf("enter THE NUMBER OF VERTICES:"); scanf("%d",&n); printf("enterthecoordinate(reenterthefirstvertexattheend )"); for(i=0;i<2*n+2;i++) scanf("%d",&p[i]); clrscr( ); init( ); getch( ); do clrscr( ); cleardevice( ); printf("\n\t\t2d-transformations\n1.translation\n 2. ROTATION\n 3.SCALING\n4.REFLECTION\n5.SHARING\n"); printf("\n\n ENTER UR CHOICE:\n"); scanf("%d",&ch); clrscr( ); cleardevice( ); switch(ch) case 1:axis( );

6 init( ); translate( ); case 2:axis( ); init( ); rotate( ); case 3:axis( ); init( ); scaling( ); case 4:reflect( ); case 5:share( ); while(ch!=6); closegraph( ); void axis(void) cleardevice( ); setlinestyle(solid_line,1,1); line(320,0,320,getmaxy( )); line(0,240,getmaxx( ),240); outtextxy(325,245,"0"); line(316,40,324,40);

7 outtextxy(325,41,"400"); line(316,440,324,440); outtextxy(325,441,"-400"); line(20,236,20,244); outtextxy(19,250,"-600"); line(620,236,620,244); outtextxy(608,250,"600"); void init( ) cleardevice( ); axis( ); setcolor(yellow); setlinestyle(solid_line,1,1); q[i]=convertx(p[i]); q[i]=converty(p[i]); drawpoly(n+1,q); setcolor(white); int convertx(int x) x=x/2; return(x+=320); int converty(int y) y=y/2;

8 return(y=240-y); void share( ) int sh[20],shr[20]; float shx,shy,c; printf("(1)share RELATIVE TO X-AXIS \n"); printf("(2)share RELATIVE TO Y-AXIS \n"); printf("\n ENTER UR CHOICE:"); scanf("%f",&c); if(c==1) init( ); printf("\n ENTER THE SHARE FACTOR(shx):"); scanf("%f",&shx); sh[i]=p[i]+(shx*(p[i+1])); sh[i]=p[i]; else init( ); printf("\n ENTER THE SHARE FACTOR(shy):"); scanf("%f",&shy); sh[i]=(shy*p[i-1])+p[i]; sh[i]=p[i];

9 setlinestyle(dotted_line,1,1); shr[i]=convertx(sh[i]); shr[i]=converty(sh[i]); drawpoly(n+1,shr); getch( ); void translate( ) int tr[20],tr1[20],tx,ty; printf("\n ENTER THR X-TRANSLATION VECTOR:"); scanf("%d",&tx); printf("\n ENTER THR Y-TRANSLATION VECTOR:"); scanf("%d",&ty); tr[i]=p[i]+tx; tr[i]=p[i]+ty; setlinestyle(dotted_line,1,1); tr1[i]=convertx(tr[i]); tr1[i]=converty(tr[i]); drawpoly(n+1,tr1); getch( );

10 void scaling( ) int sc[20],sc1[20]; float sx,sy; printf("\n ENTER THE X-AXIS SCALING FACTOR:"); scanf("%f",&sx); printf("\n ENTER THE Y-AXIS SCALING FACTOR:"); scanf("%f",&sy); sc[i]=p[i]*sx; sc[i]=p[i]*sy; setlinestyle(dotted_line,1,1); sc1[i]=convertx(sc[i]); sc1[i]=converty(sc[i]); drawpoly(n+1,sc1); getch( ); void rotate( ) int ro[20],rot[20],xr,yr,v; float ang; printf("\n ENTER THE ANGLE TO ROTATE:"); scanf("%f",&ang); ang=((ang*3.14)/180)*(-1);

11 printf("\n ENTER THE ROTATION VERTEX ("); for(i=1;i<=n;i++) printf("%d)",i); scanf("%d",&v); xr=p[(2*v)-2]; yr=p[((2*v)-2)+1]; for(i=0;i<(2*n+1);i+=2) ro[i]=xr+(p[i]-xr)*cos(ang)-(p[i+1]-yr)*sin(ang); ro[i+1]=yr+(p[i]-xr)*sin(ang)+(p[i+1]-yr)*cos(ang); setlinestyle(dotted_line,1,1); rot[i]=convertx(ro[i]); rot[i]=converty(ro[i]); drawpoly(n+1,rot); getch( ); void reflect( ) int j,c,rt[20],rft[20]; printf("\n1.x-axis REFLECTION\n2.y-AXIS REFLECTION"); printf("\n ENTER THE CHOICE:"); scanf("%d",&c); clrscr( ); cleardevice( ); if(c==1)

12 rt[i]=p[i]*(-1); rt[i]=p[i]; else rt[i]=p[i]*(-1); rt[i]=p[i]; init( ); setlinestyle(dotted_line,1,1); rft[i]=convertx(rt[i]); rft[i]=converty(rt[i]); drawpoly(n+1,rft); getch( );

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