1.Write a C Program to draw animation using increasing circles filled with different colors and patterns.
#include<graphics.h>
#include<conio.h>
void main()
{
intgd=DETECT, gm, i, x, y;
initgraph(&gd, &gm, "C:\\TC\\BGI");
x=getmaxx()/3;
y=getmaxx()/3;
setbkcolor(WHITE);
setcolor(BLUE);
for(i=1;i<=8;i++)
{
setfillstyle(i,i);
delay(20);
circle(x, y, i*20);
floodfill(x-2+i*20,y,BLUE);
}
getch();
closegraph();
}
2.Write a C Program to make screen saver in that display different size circles filled with different colors
and at random places.
#include<stdio.h>
#include<conio.h>
#include"graphics.h"
#include"stdlib.h"
void main()
{
intgd=DETECT,gm,i=0,x,xx,y,yy,r;
//Initializes the graphics system
initgraph(&gd,&gm,"c:\\tc\\bgi");
x=getmaxx();
y=getmaxy();
while(!kbhit())
{
i++;
// setfillstyle(random(i),random(30));
circle(xx=random(x),yy=random(y),random(30));
setfillstyle(random(i),random(30));
floodfill(xx,yy,getmaxcolor());
delay(200);
}
getch();
}
3.Write a C program of Translation, Rotation, and Scaling using Composite Transformation.
#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>
int x1,y1,x2,y2,x3,y3,a,b;
void draw();
void rotate();
int main(void)
{
int gd=DETECT,gm;
initgraph(&gd,&gm,"C:\\TC\\BGI");
printf("Enter first co-ordinate value for triangle:");
scanf("%d%d",&x1,&y1);
printf("Enter second co-ordinatevalues for triangle:");
scanf("%d%d",&x2,&y2);
printf("Enter third co-ordinate valuesfor triangle:");
scanf("%d%d",&x3,&y3);
draw();
getch();
rotate();
getch();
return 0;
}
void draw()
{
line(x1,y1,x2,y2);
line(x2,y2,x3,y3);
line(x3,y3,x1,y1);
}
void rotate()
{
int a1,a2,a3,b1,b2,b3;
float angle;
printf("Enter the rotation angle co-ordinates:");
scanf("%f",&angle);
cleardevice();
angle=(angle*3.14)/180;
a1=a+(x1-a)*cos(angle)-(y1-b)*sin(angle);
b1=b+(x1-a)*sin(angle)+(y2-b)*cos(angle);
a2=a+(x2-a)*cos(angle)-(y1-b)*sin(angle);
b2=b+(x2-a)*sin(angle)+(y2-b)*cos(angle);
a3=a+(x3-a)*cos(angle)-(y1-b)*sin(angle);
b3=b+(x3-a)*sin(angle)+(y2-b)*cos(angle);
printf("ROTATION");
printf("\n Changed coordinates\n");
printf("%d %d\n%d %d\n%d %d",a1,b1,a2,b2,a3,b3);
line(a1,b1,a2,b2);
line(a2,b2,a3,b3);
line(a3,b3,a1,b1);
}
4.Write a C program to draw a Circle using midpoint implementation Method.
#include<stdio.h>
#include<graphics.h>
void drawcircle(int x0, int y0, int radius)
{
int x = radius;
int y = 0;
int err = 0;
while (x >= y)
{
putpixel(x0 + x, y0 + y, 7);
putpixel(x0 + y, y0 + x, 7);
putpixel(x0 - y, y0 + x, 7);
putpixel(x0 - x, y0 + y, 7);
putpixel(x0 - x, y0 - y, 7);
putpixel(x0 - y, y0 - x, 7);
putpixel(x0 + y, y0 - x, 7);
putpixel(x0 + x, y0 - y, 7);
if (err <= 0)
{
y += 1;
err += 2*y + 1;
}
if (err > 0)
{
x -= 1;
err -= 2*x + 1;
}
}
}
void main()
{
int gdriver=DETECT, gmode, error, x, y, r;
initgraph(&gdriver, &gmode, "c:\\turboc3\\bgi");
printf("Enter radius of circle: ");
scanf("%d", &r);
printf("Enter co-ordinates of center(x and y): ");
scanf("%d%d", &x, &y);
drawcircle(x, y, r);
getch();
}
5.Write a program to draw Bezier curve.
#include <stdio.h>
#include <stdlib.h>
#include <graphics.h>
#include <math.h>
void bezier (int x[4], int y[4])
{
int gd = DETECT, gm;
int i;
double t;
initgraph (&gd, &gm, "C:\\tc\\bgi");
for (t = 0.0; t < 1.0; t += 0.0005)
{
double xt = pow (1-t, 3) * x[0] + 3 * t * pow (1-t, 2) * x[1] +
3 * pow (t, 2) * (1-t) * x[2] + pow (t, 3) * x[3];
double yt = pow (1-t, 3) * y[0] + 3 * t * pow (1-t, 2) * y[1] +
3 * pow (t, 2) * (1-t) * y[2] + pow (t, 3) * y[3];
putpixel (xt, yt, WHITE);
}
for (i=0; i<4; i++)
putpixel (x[i], y[i], YELLOW);
getch();
closegraph();
return;
}
void main()
{
int x[4], y[4];
int i;
printf ("Enter the x- and y-coordinates of the four control points.\n");
for (i=0; i<4; i++)
scanf ("%d%d", &x[i], &y[i]);
bezier (x, y);
}
6.Write a C Program to implement DDA Line Drawing Algorithm.
#include<graphics.h>
#include<conio.h>
#include<stdio.h>
void main()
{
intgd = DETECT ,gm, i;
float x, y,dx,dy,steps;
int x0, x1, y0, y1;
initgraph(&gd, &gm, "C:\\TC\\BGI");
setbkcolor(WHITE);
x0 = 100 , y0 = 200, x1 = 500, y1 = 300;
dx = (float)(x1 - x0);
dy = (float)(y1 - y0);
if(dx>=dy)
{
steps = dx;
}
else
{
steps = dy;
}
dx = dx/steps;
dy = dy/steps;
x = x0;
y = y0;
i = 1;
while(i<= steps)
{
putpixel(x, y, RED);
x += dx;
y += dy;
i=i+1;
}
getch();
closegraph();
}
7. Write a C Program to implement BRESHANMS LINE DRAWING Algorithm.
#include<stdio.h>
#include<graphics.h>
void drawline(int x0, int y0, int x1, int y1)
{
int dx, dy, p, x, y;
dx=x1-x0;
dy=y1-y0;
x=x0;
y=y0;
p=2*dy-dx;
while(x<x1)
{
if(p>=0)
{
putpixel(x,y,7);
y=y+1;
p=p+2*dy-2*dx;
}
else
{
putpixel(x,y,7);
p=p+2*dy;}
x=x+1;
}
}
int main()
{
int gdriver=DETECT, gmode, error, x0, y0, x1, y1;
initgraph(&gdriver, &gmode, "c:\\turboc3\\bgi");
printf("Enter co-ordinates of first point: ");
scanf("%d%d", &x0, &y0);
printf("Enter co-ordinates of second point: ");
scanf("%d%d", &x1, &y1);
drawline(x0, y0, x1, y1);
return 0;
}
8.Write a C program to rotate a Line .
#include<stdio.h>
#include<graphics.h>
#include<math.h>
int main()
{
intgd=0,gm,x1,y1,x2,y2;
double s,c, angle;
initgraph(&gd, &gm, "C:\\TC\\BGI");
setcolor(RED);
printf("Enter coordinates of line: ");
scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
cleardevice();
setbkcolor(WHITE);
line(x1,y1,x2,y2);
getch();
setbkcolor(BLACK);
printf("Enter rotation angle: ");
scanf("%lf", &angle);
setbkcolor(WHITE);
c = cos(angle *3.14/180);
s = sin(angle *3.14/180);
x1 = floor(x1 * c + y1 * s);
y1 = floor(-x1 * s + y1 * c);
x2 = floor(x2 * c + y2 * s);
y2 = floor(-x2 * s + y2 * c);
cleardevice();
line(x1, y1 ,x2, y2);
getch();
closegraph();
return 0;
}
9.Write a C program to rotate a triangle .
#include<stdio.h>
#include<graphics.h>
#include<math.h>
main()
{
intgd=0,gm,x1,y1,x2,y2,x3,y3;
double s,c, angle;
initgraph(&gd, &gm, "C:\\TURBOC3\\BGI");
setcolor(RED);
printf("Enter coordinates of triangle: ");
scanf("%d%d%d%d%d%d",&x1,&y1,&x2,&y2, &x3, &y3);
setbkcolor(WHITE);
cleardevice();
line(x1,y1,x2,y2);
line(x2,y2, x3,y3);
line(x3, y3, x1, y1);
getch();
setbkcolor(BLACK);
printf("Enter rotation angle: ");
scanf("%lf", &angle);
setbkcolor(WHITE);
c = cos(angle *M_PI/180);
s = sin(angle *M_PI/180);
x1 = floor(x1 * c + y1 * s);
y1 = floor(-x1 * s + y1 * c);
x2 = floor(x2 * c + y2 * s);
y2 = floor(-x2 * s + y2 * c);
x3 = floor(x3 * c + y3 * s);
y3 = floor(-x3 * s + y3 * c);
cleardevice();
line(x1, y1 ,x2, y2);
line(x2,y2, x3,y3);
line(x3, y3, x1, y1);
getch();
closegraph();
return 0;
}
