Logo 
Search:

C++ Programming Articles

Submit Article
Home » Articles » C++ Programming » Computer GraphicsRSS Feeds

Program that places n equally spaced points on the circumference of a circle of radius r,and then join each point to every other point

Posted By: Easy Tutor     Category: C++ Programming     Views: 13736

Write a program that places n equally spaced points on the circumference of a circle of radius r,and then join each point to every other point.

Code for Program that places n equally spaced points on the circumference of a circle of radius r,and then join each point to every other point in C++ Programming

 # include <iostream.h>
 # include <graphics.h>
 # include    <conio.h>
 # include     <math.h>

 void show_screen( );

 void draw_pattern(constint,constint,constint,constint);

 void Circle(constint,constint,constint);
 void Line(constint,constint,constint,constint);

 int main( )
    {
       int driver=VGA;
       int mode=VGAHI;

       int x=0;
       int y=0;
       int r=0;

       int n=0;

       do
      {
         show_screen( );

         gotoxy(8,10);
         cout<<"Center of the Circle :";

         gotoxy(8,11);
         cout<<"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ";

         gotoxy(12,13);
         cout<<"Enter the value of x = ";
         cin>>x;

         gotoxy(12,14);
         cout<<"Enter the value of y = ";
         cin>>y;

         gotoxy(8,18);
         cout<<"Radius of the Circle :";

         gotoxy(8,19);
         cout<<"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ";

         gotoxy(12,21);
         cout<<"Enter the value of r = ";
         cin>>r;

         gotoxy(8,25);
         cout<<"Number of Points on the Circle :";

         gotoxy(8,26);
         cout<<"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ";

         gotoxy(12,28);
         cout<<"Enter the value of n (n>=2) = ";
         cin>>n;

         initgraph(&driver,&mode,"..\\Bgi");

         setcolor(15);
           draw_pattern(x,y,r,n);

         setcolor(15);
           outtextxy(110,460,"Press <Enter> to continue or any other key to exit.");

         int key=int(getch( ));

         if(key!=13)
        break;
      }
       while(1);

       return 0;
    }

 /*************************************************************************///--------------------------  draw_pattern( )  --------------------------///*************************************************************************/void draw_pattern(constint x,constint y,constint r, constint n)
    {
       Circle(x,y,r);

       float x_1=0;
       float y_1=0;

       float x_2=0;
       float y_2=0;

       for(int count_1=0;count_1<n;count_1++)
      {
         x_1=(x+(r*cos((2*M_PI*count_1)/n)));
         y_1=(y+(r*sin((2*M_PI*count_1)/n)));

         for(int count_2=0;count_2<n;count_2++)
        {
           x_2=x+(r*cos((2*M_PI*count_2)/n));
           y_2=y+(r*sin((2*M_PI*count_2)/n));

           Line((int)(x_1+0.5),(int)(y_1+0.5),
                          (int)(x_2+0.5),(int)(y_2+0.5));
        }
      }
    }

 /*************************************************************************///-----------------------------  Circle( )  -----------------------------///*************************************************************************/void Circle(constint h,constint k,constint r)
    {
       int color=getcolor( );

       int x=0;
       int y=r;
       int p=(1-r);

       do
      {
         putpixel((h+x),(k+y),color);
         putpixel((h+y),(k+x),color);
         putpixel((h+y),(k-x),color);
         putpixel((h+x),(k-y),color);
         putpixel((h-x),(k-y),color);
         putpixel((h-y),(k-x),color);
         putpixel((h-y),(k+x),color);
         putpixel((h-x),(k+y),color);

         x++;

         if(p<0)
        p+=((2*x)+1);

         else
        {
           y--;
           p+=((2*(x-y))+1);
        }
      }
       while(x<=y);
    }

 /*************************************************************************///-------------------------------  Line( )  -----------------------------///*************************************************************************/void Line(constint x_1,constint y_1,constint x_2,constint y_2)
    {
       int color=getcolor( );

       int x1=x_1;
       int y1=y_1;

       int x2=x_2;
       int y2=y_2;

       if(x_1>x_2)
      {
         x1=x_2;
         y1=y_2;

         x2=x_1;
         y2=y_1;
      }

       int dx=abs(x2-x1);
       int dy=abs(y2-y1);
       int inc_dec=((y2>=y1)?1:-1);

       if(dx>dy)
      {
         int two_dy=(2*dy);
         int two_dy_dx=(2*(dy-dx));
         int p=((2*dy)-dx);

         int x=x1;
         int y=y1;

         putpixel(x,y,color);

         while(x<x2)
        {
           x++;

           if(p<0)
              p+=two_dy;

           else
              {
             y+=inc_dec;
             p+=two_dy_dx;
              }

           putpixel(x,y,color);
        }
      }

       else
      {
         int two_dx=(2*dx);
         int two_dx_dy=(2*(dx-dy));
         int p=((2*dx)-dy);

         int x=x1;
         int y=y1;

         putpixel(x,y,color);

         while(y!=y2)
        {
           y+=inc_dec;

           if(p<0)
              p+=two_dx;

           else
              {
             x++;
             p+=two_dx_dy;
              }

           putpixel(x,y,color);
        }
      }
    }

 /*************************************************************************///--------------------------  show_screen( )  ---------------------------///*************************************************************************/void show_screen( )
    {
       restorecrtmode( );
       textmode(C4350);

       cprintf("\n********************************************************************************");
       cprintf("**************************-                           -*************************");
       cprintf("*-------------------------- ");

       textbackground(1);
       cprintf(" N-Points Circle Pattern ");
       textbackground(8);

       cprintf(" -------------------------*");
       cprintf("**************************-                           -*************************");
       cprintf("*-****************************************************************************-*");

       for(int count=0;count<42;count++)
      cprintf("*-*                                                                          *-*");

       gotoxy(1,46);
       cprintf("*-****************************************************************************-*");
       cprintf("*------------------------------------------------------------------------------*");
       cprintf("********************************************************************************");

       gotoxy(1,2);
    }

  
Share: 



Easy Tutor
Easy Tutor author of Program that places n equally spaced points on the circumference of a circle of radius r,and then join each point to every other point is from United States. Easy Tutor says

Hello Friends,

I am Free Lance Tutor, who helped student in completing their homework.

I have 4 Years of hands on experience on helping student in completing their homework. I also guide them in doing their final year projects.

I have share many programs on this website for everyone to use freely, if you need further assistance, than please contact me on easytutor.2ya [at the rate] gmail [dot] com

I have special discount scheme for providing tutor services. I am providing tutor service to students from various contries, currently most of my students are from United States, India, Australia, Pakistan, Germany, UK and Canada.

I am also here to expand my technical network to receive more opportunity in my career, make friends to help them in resolving their technical problem, learn and share my knowledge, If you like to be my friend, Please send me friend request.

Thanks,
Happy Programming :)

 
View All Articles

 
Please enter your Comment

  • Comment should be atleast 30 Characters.
  • Please put code inside [Code] your code [/Code].

 
No Comment Found, Be the First to post comment!