3d transformation program in c

3D Transformation

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

#include<math.h>

int maxx,maxy,midx,midy;

void axis()

{

getch();

cleardevice();

line(midx,0,midx,maxy);

line(0,midy,maxx,midy);

}

void main()

{

int gd,gm,x,y,z,o,x1,x2,y1,y2;

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"e:\tc\bgi");

setfillstyle(0,getmaxcolor());

maxx=getmaxx();

maxy=getmaxy();

midx=maxx/2;

midy=maxy/2;

axis();

bar3d(midx+50,midy-100,midx+60,midy-90,5,1);

printf("Enter translation factor <BR>);

scanf("%d%d",&x,&y);

axis();

printf("After translation:<BR>);

bar3d(midx+x+50,midy-(y+100),midx+x+60,midy-(y+90),5,1);

axis();

bar3d(midx+50,midy-100,midx+60,midy-90,5,1);

printf("Enter scaling factors<BR>);

scanf("%d%d%d", &x,&y,&z);

axis();

printf("After scaling<BR>);

bar3d(midx+(x*50),midy-(y*100),midx+(x*60),midy-(y*90),5*z,1);

axis();

bar3d(midx+50,midy-100,midx+60,midy-90,5,1);

printf("Enter rotating angle<BR> );

scanf("%d",&o);

 x1=50*cos(o*3.14/180)-100*sin(o*3.14/180);

 y1=50*sin(o*3.14/180)+100*cos(o*3.14/180);

 x2=60*cos(o*3.14/180)-90*sin(o*3.14/180);

 y2=60*sin(o*3.14/180)+90*cos(o*3.14/180);

axis();

printf("After rotation about z axis<BR> );

bar3d(midx+x1,midy-y1,midx+x2,midy-y2,5,1);

axis();

printf("After rotation  about x axis <BR>);

bar3d(midx+50,midy-x1,midx+60,midy-x2,5,1);

axis();

printf("After rotation about yaxis<BR>);

bar3d(midx+x1,midy-100,midx+x2,midy-90,5,1);

getch();

closegraph();

}

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BRESENHAM’S CIRCLE ALGORITHM

PROGRAM:

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

int x,y,p;

void plotcircle(int xc,int yc,int color)

{

putpixel(xc+x,yc+y,color);

putpixel(xc+y,yc+x,color);

putpixel(xc+x,yc-y,color);

putpixel(xc+y,yc-x,color);

putpixel(xc-x,yc-y,color);

putpixel(xc-y,yc-x,color);

putpixel(xc-x,yc+y,color);

putpixel(xc-y,yc+x,color);

}

void bicircle(int xcen,int ycen,int rad,int color)

{

x=0;

y=rad;

plotcircle(xcen,ycen,color);

p=1-rad;

while(x<y)

{

if(p<0)

++x;

else

{

++x;

--y;

}

if(p<0)

p+=2*x+1;

else

{

p+=2*(x-y)+1;

plotcircle(xcen,ycen,color);

}

}

}

void main()

{

int gd=DETECT,gm,xc,yc,radius,color;

initgraph(&gd,&gm,"");

printf("\nEnter x pos,y pos and radius");

scanf ("%d%d%d",&xc,&yc,&radius);

x=0;

y=radius;

plotcircle(xc,yc,color);

p=1-radius;

while(x<y)

{

if(p<0)

++x;

else

{

++x;

--y;

}

if(p<0)

p+=2*x+1;

else

{

p+=2*(x-y)+1;

plotcircle(xc,yc,color);

}

}

getch();

bicircle(xc,yc,radius,color);

}

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BRESENHAM’S LINE ALGORITHM

PROGRAM

#include<stdio.h>

#include<conio.h>

#include<iostream.h>

#include<math.h>

#include<graphics.h>

#include<stdlib.h>

void main()

{

            int gd=DETECT,gm,x0,y0,x1,y1,p,dx,dy,i,x2,y2,ec;

            ec=graphresult();

            if(ec!=grOk)

            {

                        cout<<"Graphics error:%s\n",grapherrormsg(ec);

                        cout<<"press any key to halt";

                        getch();

                        exit(1);

            }

            initgraph(&gd,&gm,"");

            cout<<"enter left end pt";

            cin>>x0>>y0;

            cout<<"Enter right end pts";

            cin>>x1>>y1;

            cleardevice();

            dx=abs(x1-x0);

            dy=(y1-y0);

            if(dx<dy)

            {

                        y2=dx;

                        dx=dy;

                        dy=y2;

                        x2=x0;

                        y2=y0;

            }

            else

            {

                        x2=y0;

                        y2=x0;

            }

            p=2*dx*dy;

            putpixel(x2,y2,RED);

            for(i=0;i<=x0;i++)

            {

                        if(p<0)

                        {

                                    y2=y2+1;

                                    p=p+2*dy;

                        }

                        else

                        {

                                    x1++;

                                    p=p+2*dy-2*dx;

                        }

                        putpixel(x1,y1,RED);

            }

            setbkcolor(GREEN);

            getch();

            return;

}

Output:

Enter the left and right end points:

0 0

10 10

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output primitives program

PROGRAM:

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

#include<string.h>

void main()

{

char ch='y';

int gd=DETECT,gm,x1,y1,x2,y2,rad,sa,ea,xrad,yrad,i;

initgraph(&gd,&gm,"");

while(ch=='y')

{

cleardevice();

setbkcolor(9);

outtextxy(100,150,"Enter 1 to get line");

outtextxy(100,170,"2.Circle");

outtextxy(100,190,"3.Box");

outtextxy(100,210,"4.Arc");

outtextxy(100,230,"5.Ellipse");

outtextxy(100,250,"6.Rectangle");

outtextxy(100,270,"7.Exit");

ch=getch();

cleardevice();

switch(ch)

{

case '1':

line(100,200,300,400);

break;

case '2':

circle(200,200,100);

break;

case '3':

setfillstyle(5,4);

bar(100,300,200,100);

break;

case '4':

setfillstyle(5,4);

arc(200,200,100,300,100);

break;

case '5':

setfillstyle(5,4);

fillellipse(100,100,50,100);

break;

case '6':

settextstyle(DEFAULT_FONT,0,2);

outtextxy(120,140,"VEL TECH");

line(100,100,100,300);

line(300,300,100,300);

line(100,100,300,100);

line(300,100,300,300);

break;

case '7':

closegraph();

return;

}

ch='y';

getch();

}

}

Output:

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square number using calculator

PRINT THE SQUARE NUMBER


#include<studio.h>
#include<conio.h>
void main()
{
int i;
clrscr();
i=1;
while(i<=100)
{
i++;
printf("\n%d",i*i);
}
getch();
}

OUTPUT


Enter the no: 2

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