#include<stdio.h>
#include<math.h>
#include<graphics.h>
#include<conio.h>
int transtoorg(int);
float rotateatorigin(float,int);
float scaleatorigin(float,float,int);
int transfromorg(int);
int draw(int);
int storex[50];
int storey[50];
int refptx,refpty;
float tox[50],toy[50],tfox[50],tfoy[50],rotx[50],roty[50],sx[50],sy[50];
main()
{
 int gd=DETECT,gm;
 int i,edges;
 float angle,sfx,sfy;

 printf("MAXIMUM FIFTY EDGES CAN BE ENTERED");
 printf("\nEnter the number of edges:");
 scanf("%d",&edges);
 for(i=0;i<edges;i++)
 {
  printf("\nEnter the x-y co-ordinate:");
  scanf("%d %d",&storex[i],&storey[i]);
 }
 printf("\nEnter the reffers x-y point:");
 scanf("%d %d",&refptx,&refpty);
 printf("\nEnter the scaling factor for x & y:");
 scanf("%f %f",&sfx,&sfy);

 printf("\nEnter the angle for rotation:");
 scanf("%f",&angle);

 initgraph(&gd,&gm,"C:\\turboc\\bgi");

 /************ Draws the objects ******************/
 moveto(storex[0],storey[0]);
 for(i=1;i<edges;i++)
 {
   lineto(storex[i],storey[i]);
 }
 lineto(storex[0],storey[0]);
 outtextxy(0,0,"Press any key" );
 getch();
 transtoorg(edges);
 rotateatorigin(angle,edges);
 scaleatorigin(sfx,sfy,edges);
 transfromorg(edges);
 draw(edges);

 getch();
 closegraph();
 return 0;
}

int transtoorg(int edges)

{
 int i;
 for(i=0;i<edges;i++)
 {
  tox[i]=(storex[i]-refptx);
  toy[i]=(storey[i]-refpty);
 }
/* return 0;*/
}

float rotateatorigin(float angle,int edges)
{
 int i;
 float rad;
 rad=(3.1415/180)*angle;
 for(i=0;i<edges;i++)
 {
  rotx[i]=(tox[i]*cos(rad)-toy[i]*sin(rad));
  roty[i]=(tox[i]*sin(rad)+toy[i]*cos(rad));
 }
/* return 0;    */
}


float scaleatorigin(float sfx,float sfy,int edges)
{
 int i;

 for(i=0;i<edges;i++)
 {
  sx[i]=rotx[i]*sfx;
  sy[i]=roty[i]*sfy;
 }
 /*return 0;*/
}

int transfromorg(int edges)
{
 int i;

 for(i=0;i<edges;i++)
 {
  tfox[i]=sx[i]+refptx;
  tfoy[i]=sy[i]+refpty;
 }
 return 0;
}

draw(int edges)
{
 int i;

 moveto(tfox[0],tfoy[0]);
 for(i=1;i<edges;i++)
 {
   lineto(tfox[i],tfoy[i]);
 }
  lineto(tfox[0],tfoy[0]);
 return 0;
}