// HEADER FILES USED
#include<stdio.h>
#include<conio.h>
#include<graphics.h>

// FUNCTIONS USED
void introduction();
void segments();
void satellite_symbol();
void projectwork();
void proj1();
void proj2();
void proj3();
void proj4();
void closing();

void main()
{
  int gd=DETECT,gm;
  initgraph(&gd,&gm,"c:\\turboc3\\bgi");

  introduction();
  segments();
  satellite_symbol();
  projectwork();
  closing();
  getch();
  closegraph();
  restorecrtmode();
 }

/* TO DISPLAY THE NAME OF THE PROGRAMMER */

void introduction()
{
  setbkcolor(RED);
  setcolor(YELLOW);
  delay(1000);
  settextstyle(7,0,6);
  outtextxy(90,50,"GPS System Demo");

  delay(1000);
  setcolor(WHITE);
  outtextxy(240,150,"Project");

  delay(1000);
  outtextxy(270,250,"in C");
  setcolor(YELLOW);
  delay(1000);
  settextstyle(7,0,2);
  outtextxy(100,350,"By : Manuj Arora");
  delay(2000);
  cleardevice();
 }

/* TO DISPLAY MAJOR SEGMENTS OF GPS */

void segments()
{
  setbkcolor(BLUE);
  setcolor(YELLOW);
  settextstyle(7,0,6);

  delay(1000);
  outtextxy(100,100,"Major Segments");
  delay(500);
  outtextxy(280,200,"Of");
  delay(1000);
  outtextxy(230,300,"G P S ");
  delay(3000);
  cleardevice();

  setcolor(WHITE);
  settextstyle(8,0,4);
  outtextxy(100,40,"GPS Segments");
  delay(1000);
  circle(450,120,75);
  setfillstyle(1,LIGHTGREEN);
  floodfill(450,120,WHITE);

  setcolor(RED);
  settextstyle(8,0,2);
  outtextxy(405,100,"CONTROL");
  setcolor(WHITE);
  delay(1000);

  setcolor(YELLOW);
  moveto(375,120);
  lineto(225,225);
  moveto(225,225);
  lineto(245,205);
  moveto(225,225);
  lineto(250,215);
  delay(1000);

  setcolor(WHITE);
  circle(150,250,75);
  setfillstyle(1,CYAN);
  floodfill(175,275,WHITE);

  setcolor(RED);
  settextstyle(8,0,3);
  outtextxy(115,225,"SPACE");
  delay(1000);

  setcolor(YELLOW);
  moveto(222,272);
  lineto(370,365);
  moveto(370,365);
  lineto(350,345);
  moveto(370,365);
  lineto(347,359);
  delay(1000);

  circle(450,370,75);
  setfillstyle(1,LIGHTRED);
  floodfill(450,370,YELLOW);
  setcolor(RED);
  outtextxy(420,350,"USER");
  delay(5000);
  cleardevice();
 }

 /* SYMBOL USED FOR SATELLITE IN THE PROGRAM */

 void satellite_symbol()
 {
  setbkcolor(CYAN);
  setcolor(RED);
  delay(1000);
  settextstyle(7,0,4);
  outtextxy(170,40,"SYMBOL   USED");
  delay(500);
  outtextxy(275,80,"FOR");
  delay(1000);
  settextstyle(7,0,4);
  outtextxy(215,120,"SATELLITE");
  delay(1000);

  setcolor(BLUE);
  circle(305,250,20);
  setfillstyle(9,RED);
  floodfill(305,250,BLUE);
  setfillstyle(9,BROWN);
  rectangle(255,200,285,300);
  floodfill(260,250,BLUE);
  rectangle(325,200,355,300);
  floodfill(350,250,BLUE);
  delay(2000);
  cleardevice();
  }

 /* TO DEMO - How GPS WORKS ?( 3D TRILATERATION ) */

 void projectwork()
 {
  setbkcolor(BLUE);
  setcolor(WHITE);
  settextstyle(7,0,6);

  delay(1000);
  outtextxy(80,150,"How GPS Works ?");
  delay(2000);
  setcolor(YELLOW);
  outtextxy(80,250,"3D TRILATERATION " );
  delay(2000);
  cleardevice();
  proj1();
  proj2();
  proj3();
  proj4();
 }

 /* TO DISPLAY REGION WHEN 1 SATELLITE IS CONSIDERED */

  void proj1()
{
  setbkcolor(BLUE);
  setcolor(YELLOW);
  settextstyle(7,0,4);
  outtextxy(130,30,"No. of Satellites Used : 1");
  delay(1000);
  setcolor(WHITE);
  circle(320,240,150);
  setfillstyle(1,YELLOW);
  floodfill(320,240,WHITE);

  setcolor(GREEN);
  setfillstyle(9,BROWN);
  circle(320,240,10);
  floodfill(320,240,GREEN);
  rectangle(290,220,310,260);
  floodfill(300,240,GREEN);
  rectangle(330,220,350,260);
  floodfill(340,240,GREEN);
  moveto(320,240);
  lineto(350,387);
  moveto(350,387);
  lineto(345,376);
  moveto(350,387);
  lineto(350,375);
  delay(1000);
  setcolor(YELLOW);
  outtextxy(100,400,"Region : Imaginary Sphere");
  delay(3000);
  cleardevice();
  }

 /* TO DISPLAY REGION WHEN 2 SATELLITES ARE CONSIDERED */

void proj2()
{
  setbkcolor(BLUE);
  setcolor(YELLOW);
  settextstyle(7,0,4);
  outtextxy(110,30,"No. of Satellites Used : 2");
  delay(1000);

  setcolor(YELLOW);
  circle(250,220,100);
  circle(370,220,100);
  setfillstyle(1,GREEN);
  floodfill(252,222,YELLOW);
  floodfill(372,220,YELLOW);
  setcolor(YELLOW);
  circle(250,220,5);
  rectangle(235,205,245,235);
  rectangle(255,205,265,235);
  setfillstyle(9,RED);
  floodfill(252,222,YELLOW);
  floodfill(240,210,YELLOW);
  floodfill(260,210,YELLOW);
  circle(370,220,5);
  rectangle(355,205,365,235);
  rectangle(375,205,385,235);
  floodfill(372,222,YELLOW);
  floodfill(357,207,YELLOW);
  floodfill(377,207,YELLOW);
  ellipse(310,220,90,89,10,81);
  setfillstyle(1,LIGHTBLUE);
  floodfill(315,230,YELLOW);
  setfillstyle(1,GREEN);
  floodfill(340,220,YELLOW);
  floodfill(280,220,YELLOW);
  delay(1000);

  setcolor(YELLOW);
  outtextxy(100,400,"Region : Common Circular");
  delay(1000);
  setcolor(WHITE);
  moveto(350,410);
  lineto(315,290);
  moveto(315,290);
  lineto(320,300);
  moveto(315,290);
  lineto(317,305);
  delay(3000);
  cleardevice();

  setbkcolor(BLACK);
  setcolor(YELLOW);
  settextstyle(7,0,4);
  delay(1000);
  outtextxy(110,20,"Another View of Two Satellites");
  delay(1000);
  setcolor(RED);
  arc(250,180,53,307,100);
  arc(370,180,233,127,100);
  setcolor(BLUE);
  ellipse(310,181,90,89,10,81);

  setcolor(RED);
  setfillstyle(9,LIGHTGREEN);
  circle(250,180,5);
  floodfill(252,182,RED);
  rectangle(235,165,245,195);
  floodfill(240,170,RED);
  rectangle(255,165,265,195);
  floodfill(260,170,RED);

  circle(370,180,5);
  floodfill(372,182,RED);
  rectangle(355,165,365,195);
  floodfill(360,170,RED);
  rectangle(375,165,385,195);
  floodfill(380,170,RED);
  setcolor(YELLOW);
  delay(1000);
  outtextxy(110,330,"No. of Satellites Used : 2");
  delay(1000);
  outtextxy(160,400,"Region : Blue Ring");
  delay(2000);
  cleardevice();
  }

 /* TO DISPLAY REGION WHEN 3 SATELLITES ARE CONSIDERED */

 void proj3()
{
  setbkcolor(BLACK);
  setcolor(YELLOW);
  settextstyle(7,0,4);
  delay(1000);
  outtextxy(110,20,"No. of Satellites Used : 3");
  delay(1000);

  setcolor(RED);
  arc(250,180,53,307,100);
  arc(370,180,233,127,100);
  setcolor(BLUE);
  ellipse(310,181,90,89,10,81);
  ellipse(310,240,0,359,75,10);
  setcolor(RED);
  arc(310,305,138,42,100);

  setfillstyle(9,LIGHTGREEN);
  circle(250,180,5);
  floodfill(252,182,RED);
  rectangle(235,165,245,195);
  floodfill(240,170,RED);
  rectangle(255,165,265,195);
  floodfill(260,170,RED);

  circle(370,180,5);
  floodfill(372,182,RED);
  rectangle(355,165,365,195);
  floodfill(360,170,RED);
  rectangle(375,165,385,195);
  floodfill(380,170,RED);

  circle(310,305,5);
  floodfill(312,307,RED);
  rectangle(295,290,305,320);
  floodfill(300,295,RED);
  rectangle(315,290,325,320);
  floodfill(320,295,RED);


  circle(318,230,3);
  setfillstyle(1,YELLOW);
  floodfill(319,231,RED);
  circle(305,250,3);
  floodfill(306,251,RED);

  delay(1000);
  setcolor(YELLOW);
  outtextxy(130,410,"Region : Two Points " );

  delay(500);
  setcolor(RED);
  setfillstyle(1,BLUE);
  floodfill(319,231,RED);
  floodfill(306,251,RED);
  delay(500);

  setfillstyle(1,YELLOW);
  floodfill(319,231,RED);
  floodfill(306,251,RED);
  delay(500);

  setfillstyle(1,BLUE);
  floodfill(319,231,RED);
  floodfill(306,251,RED);
  delay(500);

  setfillstyle(1,YELLOW);
  floodfill(319,231,RED);
  floodfill(306,251,RED);
  delay(500);

  setfillstyle(1,BLUE);
  floodfill(319,231,RED);
  floodfill(306,251,RED);
  delay(500);

  setfillstyle(1,YELLOW);
  floodfill(319,231,RED);
  floodfill(306,251,RED);
  delay(500);
  setfillstyle(1,BLUE);
  floodfill(319,231,RED);
  floodfill(306,251,RED);
  delay(500);

  setfillstyle(1,YELLOW);
  floodfill(319,231,RED);
  floodfill(306,251,RED);
  delay(3000);
  cleardevice();
 }

 /* TO DISPLAY REGION WHEN 4 SATELLITES ARE CONSIDERED */

 void proj4()
 {
  setbkcolor(BLACK);
  delay(1000);
  setcolor(YELLOW);
  settextstyle(7,0,4);
  outtextxy(130,30,"No. of Satellites Used : 4 " );
  delay(1000);

  setcolor(RED);

  circle(230,220,100);
  circle(230,220,5);
  rectangle(215,205,225,235);
  rectangle(235,205,245,235);
  setfillstyle(9,LIGHTGREEN);
  floodfill(232,222,RED);
  floodfill(220,210,RED);
  floodfill(240,210,RED);

  circle(350,170,100);
  circle(350,170,5);
  rectangle(335,155,345,185);
  rectangle(355,155,365,185);
  floodfill(352,172,RED);
  floodfill(340,160,RED);
  floodfill(360,160,RED);


  circle(220,270,100);
  circle(220,270,5);
  rectangle(205,255,215,285);
  rectangle(225,255,235,285);
  floodfill(222,272,RED);
  floodfill(210,260,RED);
  floodfill(230,260,RED);

  circle(402,320,100);
  circle(402,320,5);
  rectangle(387,305,397,335);
  rectangle(407,305,417,335);
  floodfill(404,322,RED);
  floodfill(390,310,RED);
  floodfill(410,310,RED);

  delay(1000);
  setcolor(YELLOW);
  settextstyle(7,0,4);
  outtextxy(100,420,"Region : Precisely One Point");


  setcolor(BLUE);
  circle(320,265,4);
  setfillstyle(1,YELLOW);
  floodfill(322,267,BLUE);
  delay(500);
  setfillstyle(1,RED);
  floodfill(322,267,BLUE);
  delay(500);
  setfillstyle(1,YELLOW);
  floodfill(322,267,BLUE);
  delay(500);
  setfillstyle(1,RED);
  floodfill(322,267,BLUE);
  delay(500);
  setfillstyle(1,YELLOW);
  floodfill(322,267,BLUE);
  delay(500);
  setfillstyle(1,RED);
  floodfill(322,267,BLUE);
  delay(500);
  setfillstyle(1,YELLOW);
  floodfill(322,267,BLUE);
  delay(500);
  setfillstyle(1,RED);
  floodfill(322,267,BLUE);
  delay(500);
  setfillstyle(1,YELLOW);
  floodfill(322,267,BLUE);
  delay(3000);
  cleardevice();
 }

 /* TO DISPLAY EXIT OPTION */

 void closing()
 {
  setbkcolor(RED);
  setcolor(YELLOW);
  settextstyle(7,0,4);
  delay(1000);
  outtextxy(150,180,"!!!  Thank You  !!!");
  outtextxy(110,270,"Press any Key to EXIT " );
 }