godhelpus

Program:

#include

#include

#include

#define round(a)((int)(a+0.5))

int gd=DETECT,gm;

long int p,x,y,px,py,rx2,ry2,tworx2,twory2,xc,yc,rx,ry;

void ellipseplotpoints(int xc,int yc,int x,int y)

{

putpixel(xc+x,yc+y,12);

putpixel(xc-x,yc+y,12);

putpixel(xc+x,yc-y,12);

putpixel(xc-x,yc-y,12);

}

void main()

{

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

printf("Enter the center\n");

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

printf("Enter the x and y Radii\n");

scanf("%d%d",&rx,&ry);

ry2=ry*ry;

rx2=rx*rx;

twory2=2*ry2;

tworx2=2*rx2;

x=0;

y=ry;

px=0;

py=tworx2*y;

ellipseplotpoints(xc,yc,x,y);

p=round(ry2-rx2*ry+(0.25*rx2));

while(px

{

x=x+1;

px=px+twory2;

if(p<0)

p+=ry2+px;

else

{

y=y-1;

py=py-tworx2;

p=p+ry2+px-py;

}

ellipseplotpoints(xc,yc,x,y);

}

p=round(ry2*(x+0.5)*(x+0.5)+rx2*(y-1)-rx2*ry2);

while(y>0)

{

y=y-1;

py=py-tworx2;

if(p>=0)

p+=rx2-py;

else

{

x=x+1;

px=px+twory2;

p=p+rx2-py+px;

}

ellipseplotpoints(xc,yc,x,y);

}

getch();

closegraph();

}

Sample I/O:

#include

#include

#include

void vwin();

void window();

void clip(float,float,float,float);

float x1,x2,y1,y2,xv1,xv2,yv1,yv2,y, vx1,vx2,vy2,vy1;

float xi[10],yi[10];

int i,k,count=0;

void main()

{

float sx,sy;

int n,j;

float xl[10],yl[10];

int gd=DETECT,gm;

printf("\nEnter xwmin and ywmin : ");

scanf("%f%f",&x1,&y1);

printf("\nEnter xwmax and ywmax : ");

scanf("%f%f",&x2,&y2);

printf("\nEnter the no. of points in the polygon : ");

scanf("%d",&n);

for(i=0;i

{

printf(" point %d:",i+1);

scanf("%f%f",&xl[i],&yl[i]);

}

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

y=getmaxy();

window();

getch();

for(i=0;i

{

j=(i+1)%n;

line(xl[i],y-yl[i],xl[j],y-yl[j]);

getch();

}

getch();

cleardevice();

window();

k=0;

while(k

{

j=(k+1)%n;

clip(xl[k],yl[k],xl[j],yl[j]);

k++;

}

getch();

cleardevice();

printf("\n Enter view port coordinates : ");

scanf("%f%f%f%f",&xv1,&yv1,&xv2,&yv2);

sx=(xv2-xv1)/(x2-x1);

sy=(yv2-yv1)/(y2-y1);

vwin();

getch();

for(k=0;k

{

vx1=xv1+(xi[k]-x1)*sx;

vy1=yv1+(yi[k]-y1)*sy;

vx2=xv1+(xi[k+1]-x1)*sx;

vy2=yv1+(yi[k+1]-y1)*sy;

line(vx1,y-vy1,vx2,y-vy2);

k++;

}

getch();

closegraph();

}

void clip(float xl1,float yl1,float xl2,float yl2)

{

int f=0,rg1[4],rg2[4];

float xi1,yi1,xi2,yi2, m;

for(i=0;i<4;i++)

{

rg1[i]=0;

rg2[i]=0;

}

if(xl1

rg1[3]=1;

if(xl1>x2)

rg1[2]=1;

if(yl1

rg1[1]=1;

if(yl1>y2)

rg1[0]=1;

if(xl2

rg2[3]=1;

if(xl2>x2)

rg2[2]=1;

if(yl2

rg2[1]=1;

if(yl2>y2)

rg2[0]=1;

for(i=0;i<4;i++)

{

if(rg1[i]==1)

f=1;

if(rg2[i]==1)

f=1;

}

xi1=xl1;

yi1=yl1;

xi2=xl2;

yi2=yl2;

if(f==0)

goto last;

f=0;

for(i=0;i<4;i++)

{

if(rg1[i]==1&&rg2[i]==1)

f=1;

}

if(f==1)

{

goto last2;

}

if((xl2-xl1)!=0)

m=(yl2-yl1)/(xl2-xl1);

else

m=0;

if(rg1[3]==1)

{

yi1=abs(yl1+m*(x1-xl1));

xi1=x1;

if(yi1y1)

goto reg1;

}

if(rg1[2]==1)

{

yi1=abs(yl1+m*(x2-xl1));

xi1=x2;

if(yi1y1)

goto reg1;

}

if(rg1[1]==1)

{

if(m!=0)

xi1=abs(xl1+(y1-yl1)/m);

yi1=y1;

if(xi1x1)

goto reg1;

}

if(rg1[0]==1)

{

if(m!=0)

xi1=abs(xl1+(y2-yl1)/m);

yi1=y2;

if(xi1x1)

goto reg1;

}

reg1:

if(rg2[3]==1)

{

yi2=abs(yl2+m*(x1-xl2));

xi2=x1;

if(yi2y1)

goto reg2;

}

if(rg2[2]==1)

{

yi2=abs(yl2+m*(x2-xl2));

xi2=x2;

if(yi2y1)

goto reg2;

}

if(rg2[1]==1)

{

if(m!=0)

xi2=abs(xl2+(y1-yl2)/m);

yi2=y1;

if(xi2x1)

goto reg2;

}

if(rg2[0]==1)

{

if(m!=0)

xi2=abs(xl2+(y2-yl2)/m);

yi2=y2;

if(xi2x1)

goto reg2;

}

reg2:

last:

line(xi1,y-yi1,xi2,y-yi2);

xi[count]=xi1;

yi[count]=yi1;

count++;

xi[count]=xi2;

yi[count]=yi2;

count++;

last2:

}

void window()

{

line(x1,y-y1,x1,y-y2);

line(x1,y-y2,x2,y-y2);

line(x2,y-y2,x2,y-y1);

line(x2,y-y1,x1,y-y1);

}

void vwin()

{

line(xv1,y-yv1,xv1,y-yv2);

line(xv1,y-yv2,xv2,y-yv2);

line(xv2,y-yv2,xv2,y-yv1);

line(xv2,y-yv1,xv1,y-yv1);

}

SAMPLE INPUT OUTPUT

---------------------------------

#include

#include

#include

void window();

int rg1[4],rg2[4];

float xi1,yi1,xi2,yi2,xl1,xl2,yl1,yl2;

float x1,y1,x2,y2,y;

void main()

{

int i,f=0;

float m;

int gd=DETECT,gm;

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

y=getmaxy();

printf("Enter the left bottom corner of the clip window : ");

scanf("%f%f",&x1,&y1);

printf("Enter the right top corner of the clip window : ");

scanf("%f%f",&x2,&y2);

printf("Enter the line co-ordinates : ");

scanf("%f%f%f%f",&xl1,&yl1,&xl2,&yl2);

window();

getch();

line(xl1,y-yl1,xl2,y-yl2);

getch();

for(i=0;i<4;i++)

{

rg1[i]=0;

rg2[i]=0;

}

if(xl1

rg1[3]=1;

if(xl1>x2)

rg1[2]=1;

if(yl1

rg1[1]=1;

if(yl1>y2)

rg1[0]=1;

if(xl2

rg2[3]=1;

if(xl2>x2)

rg2[2]=1;

if(yl2

rg2[1]=1;

if(yl2>y2)

rg2[0]=1;

printf("Region Code 1 : %d%d%d%d\n",rg1[0],rg1[1],rg1[2],rg1[3]);

printf("Region Code 2 : %d%d%d%d",rg2[0],rg2[1],rg2[2],rg2[3]);

getch();

for(i=0;i<4;i++)

{

if(rg1[i]==1)

f=1;

if(rg2[i]==1)

f=1;

}

xi1=xl1;

yi1=yl1;

xi2=xl2;

yi2=yl2;

if(f==0)

goto last;

if((xl2-xl1)!=0)

{

m=(yl2-yl1)/(xl2-xl1);

//m=m+1;

}

if((yl2-yl1)==0)

m=0;

if((xl2-xl1)==0)

{

xi1=xi2=xl1;

yi1=y1;

yi2=y2;

goto new;

}

if(rg1[3]==1)

{

yi1=yl1+m*(x1-xl1);

xi1=x1;

}

if(rg1[2]==1)

{

yi1=yl1+m*(x2-xl1);

xi1=x2;

}

if(rg1[1]==1)

{

xi1=xl1+(y1-yl1)/m;

yi1=y1;

}

if(rg1[0]==1)

{

xi1=xl1+(y2-yl1)/m;

yi1=y2;

}

if(rg2[3]==1)

{

yi2=yl2+m*(x1-xl2);

xi2=x1;

}

if(rg2[2]==1)

{

yi2=yl2+m*(x2-xl2);

xi2=x2;

}

if(rg2[1]==1)

{

xi2=xl2+(y1-yl2)/m;

yi2=y1;

}

if(rg2[0]==1)

{

xi2=xl2+(y2-xl2)/m;

yi2=y2;

}

new:

cleardevice();

printf("\nthe slope is %f",m);

printf("\nthe 1st intersection(or the 1st end) co-ord are: (%f,%f)",xi1,yi1);

printf("\nthe 2nd intersection(or the 2nd end) co-ord are: (%f,%f)",xi2,yi2);

getch();

window();

getch();

setcolor(YELLOW);

line(xi1,y-yi1,xi2,y-yi2);

last: getch();

closegraph();

}

void window()

{

line(x1,y-y1,x1,y-y2);

line(x1,y-y2,x2,y-y2);

line(x2,y-y2,x2,y-y1);

line(x2,y-y1,x1,y-y1);

}

SAMPLE INPUT OUTPUT

----------------------------------

#include
#include
#include
struct point
{
int x;
int y;
}pt[100];
int h=0;
void plotpoint(int xc,int yc,int x,int y,int d)
{
if(d==1)
{
pt[h].x=x;
pt[h].y=y;
h++;
}
putpixel(xc+x,yc+y,RED);
putpixel(xc-x,yc+y,RED);
putpixel(xc+x,yc-y,RED);
putpixel(xc-x,yc-y,RED);
putpixel(xc+y,yc+x,RED);
putpixel(xc-y,yc+x,RED);
putpixel(xc+y,yc-x,RED);
putpixel(xc-y,yc-x,RED);
}

void cmidpoint(int xc,int yc,int r,int d)
{
int x,y,p;
x=0;
y=r;
plotpoint(xc,yc,x,y,d);
p=1-r;
while(x
{
if(p<0)
{
x=x+1;
p=p+(2*x)+1;
}
else
{
x=x+1;
y=y-1;
p=p+2*(x-y)+1;
}
plotpoint(xc,yc,x,y,d);
}
}
void main()
{
int xc,yc,r,gd,gm,i,ix,iy;
xc=200;
yc=200;
r=100;
clrscr();
gd=DETECT;
initgraph(&gd,&gm,"c:/tc/bgi");
//for(;xc<=100;xc+=5)
cmidpoint(xc,yc,r,1);
for(i=0;i
{
ix=xc+pt[i].x;
iy=pt[i].y+yc;
cmidpoint(ix,iy,10,0);
ix=xc-pt[i].x;
iy=yc+pt[i].y;
cmidpoint(ix,iy,10,0);
ix=xc+pt[i].x;
iy=yc-pt[i].y;
cmidpoint(ix,iy,10,0);
ix=xc-pt[i].x;
iy=yc-pt[i].y;
cmidpoint(ix,iy,10,0);
ix=xc+pt[i].y;
iy=yc+pt[i].x;
cmidpoint(ix,iy,10,0);
ix=xc-pt[i].y;
iy=yc+pt[i].x;
cmidpoint(ix,iy,10,0);
ix=xc+pt[i].y;
iy=yc-pt[i].x;
cmidpoint(ix,iy,10,0);
ix=xc-pt[i].y;
iy=yc-pt[i].x;
cmidpoint(ix,iy,10,0);

}
getch();
closegraph();
}

#include
#include
#include
#include
struct point
{
int x;
int y;
}pt[10];
int h=1;
void bres(int x1,int y1,int x2,int y2)
{
int p,inx,iny,dx,dy;
dx=x2-x1;
dy=y2-y1;
if(dx>0)
inx=1;
else
inx=-1;
if(dy>0)
iny=1;
else
iny=-1;
dx=abs(dx);
dy=abs(dy);
if(dx>=dy)
{
p=(2*dy)-dx;
while(x1!=x2)
{
putpixel(x1,y1,h);
if(p>=0)
{
y1=y1+iny;
p-=(2*dx);
}
p+=(2*dy);
x1=x1+inx;
}
}
else
{
p=(2*dx)-dy;
while(y1!=y2)
{
putpixel(x1,y1,h);
if(p>=0)
{
x1+=inx;
p-=(2*dy);
}
y1+=iny;
p+=(2*dx);
}
}
putpixel(x1,y1,h);
h++;
}
void main()
{
int gd=DETECT,p,gm,i,j;
initgraph(&gd,&gm,"c:\\tc\\bgi");
printf("\n BLINKING STAR");
pt[0].x=100;
pt[0].y=100;
pt[1].x=150;
pt[1].y=100;
pt[2].x=200,
pt[2].y=50;
pt[3].x=250;
pt[3].y=100;
pt[4].x=300;
pt[4].y=100;
pt[5].x=260;
pt[5].y=150;
pt[6].x=300;
pt[6].y=200;
pt[7].x=250;
pt[7].y=200;
pt[8].x=200;
pt[8].y=250;
pt[9].x=150;
pt[9].y=200;
pt[10].x=100;
pt[10].y=200;
pt[11].x=140;
pt[11].y=150;
for(j=0;j<20;j++)
{
cleardevice();
clrscr();
clearviewport();
setbkcolor(0);
for(i=0;i<11;i++)
{
p=i;
bres(pt[i].x,pt[i].y,pt[p+1].x,pt[p+1].y);
}
bres(pt[i].x,pt[i].y,pt[0].x,pt[0].y);
sleep(2);
}
getch();
}

#include
#include
#include
#include
struct point
{
int x;
int y;
}pt[10];
int h=1;
int j=0;
void bres(int x1,int y1,int x2,int y2,int d)
{
int p,inx,iny,dx,dy,i;
dx=x2-x1;
dy=y2-y1;
if(dx>0)
inx=1;
else
inx=-1;
if(dy>0)
iny=1;
else
iny=-1;
dx=abs(dx);
dy=abs(dy);
if(dx>=dy)
{
p=(2*dy)-dx;
while(x1!=x2)
{
i=j%3;
if(d==0 && i==0)
{
putpixel(x1,y1,h);
}
if(d==1)
putpixel(x1,y1,h);
if(p>=0)
{
y1=y1+iny;
p-=(2*dx);
}
p+=(2*dy);
x1=x1+inx;
j++;
}
}
else
{
p=(2*dx)-dy;
while(y1!=y2)
{
i=j%3;
if(d==0 && i==0)
{
putpixel(x1,y1,h);
}
if(d==1)
putpixel(x1,y1,h);
if(p>=0)
{
x1+=inx;
p-=(2*dy);
}
y1+=iny;
p+=(2*dx);
j++;
}
}
/*if(d==0 && (j%2)==0)
{
putpixel(x1,y1,h);
j++;
}
if(d==1)*/
putpixel(x1,y1,h);
}
void main()
{
int gd=DETECT,p,gm,i,j;
initgraph(&gd,&gm,"c:\\tc\\bgi");
printf("\n CUBE");
pt[0].x=100;
pt[0].y=200;
pt[1].x=200;
pt[1].y=200;
pt[2].x=200,
pt[2].y=300;
pt[3].x=100;
pt[3].y=300;
pt[4].x=100;
pt[4].y=200;
pt[5].x=150;
pt[5].y=150;
pt[6].x=250;
pt[6].y=150;
pt[7].x=200;
pt[7].y=200;
pt[8].x=250;
pt[8].y=150;
pt[9].x=250;
pt[9].y=250;
pt[10].x=200;
pt[10].y=300;
pt[11].x=150;
pt[11].y=150;
pt[12].x=150;
pt[12].y=250;
pt[13].x=100;
pt[13].y=300;
/*for(j=0;j<20;j++)
{
cleardevice();
clrscr();
clearviewport();*/
setbkcolor(0);
for(i=0;i<10;i++)
{
p=i;
bres(pt[i].x,pt[i].y,pt[p+1].x,pt[p+1].y,1);
}
setlinestyle(DOTTED_LINE,1,0);
bres(150,150,150,250,0);
bres(150,250,100,300,0);
bres(150,250,250,250,0);
sleep(2);
getch();
}

#include
#include
#include
void plotpoint(int xc,int yc,int x,int y,int d)
{

putpixel(xc+x,yc+y,d);
putpixel(xc-x,yc+y,d);
putpixel(xc+x,yc-y,d);
putpixel(xc-x,yc-y,d);
putpixel(xc+y,yc+x,d);
putpixel(xc-y,yc+x,d);
putpixel(xc+y,yc-x,d);
putpixel(xc-y,yc-x,d);
}

void cmidpoint(int xc,int yc,int r,int d)
{
int x,y,p;
x=0;
y=r;
plotpoint(xc,yc,x,y,d);
p=1-r;
while(x
{
if(p<0)
{
x=x+1;
p=p+(2*x)+1;
}
else
{
x=x+1;
y=y-1;
p=p+2*(x-y)+1;
}
plotpoint(xc,yc,x,y,d);
}
}
void main()
{
int xc,yc,r,gd,gm;
clrscr();
gd=DETECT;
initgraph(&gd,&gm,"c:/tc/bgi");
cmidpoint(100,100,20,4);
setfillstyle(SOLID_FILL,4);
floodfill(100,100,4);
cmidpoint(100,145,20,12);
setfillstyle(SOLID_FILL,12);
floodfill(100,145,12);
cmidpoint(100,190,20,2);
setfillstyle(SOLID_FILL,2);
floodfill(100,190,2);
line(50,70,150,70);
line(150,70,150,220);
line(150,220,50,220);
line(50,220,50,70);
getch();
closegraph();
}