Bezier Curve

Code:

#include<iostream>

#include<conio.h>

#include<dos.h>

#include<graphics.h>

using namespace std;

int main(){

int gd=DETECT,gm;

initgraph(&gd,&gm,"C:\\TC\\BGI");

int px,py,i,n;

cout<<"Enter the number of control points: ";

cin>>n;

int x[n],y[n];

cout<<"Enter the coordinates of control points for bezier curve: ";

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

{

cin>>x[i]>>y[i];

}

for(i=0;i<n-1;i++)

{

line(x[i],y[i],x[i+1],y[i+1]);

}

double t;

for(t=0.0;t<=1.0;t+=0.001)

{

px=(1-t)*(1-t)*(1-t)*x[0]+3*t*(1-t)*(1-t)*x[1]+3*t*t*(1-t)*x[2]+t*t*t*x[3];

py=(1-t)*(1-t)*(1-t)*y[0]+3*t*(1-t)*(1-t)*y[1]+3*t*t*(1-t)*y[2]+t*t*t*y[3];

putpixel(px,py,YELLOW);

delay(1);

}

getch();

closegraph();

return 0;

}

Output: