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nsssayom/racing_game.cpp

Created July 31, 2019 15:33
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a 2D racing game developed with OpenGL
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racing_game.cpp
#include<GL/glut.h>
#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#include<limits.h>
#include<unistd.h>
#include<time.h>
#include<math.h>
#include<cstring>
#include<iostream>
#include<vector>
#include<stdlib.h>
#define MAX_CARS 3
void drawCar();
void drawFootPath();
void drawDivider();
void drawSurroundings();
void stopGame();
void drawOtherCars(int);
void drawOther();
void setCars();
void moveOtherCars();
int detectCollision();
void drawString(std::string);
void drawMainMenu();
void drawExitMenu();
void drawTime();
void stopGame();
void resumeGame();
void drawScore(int);
void drawDistanceBar();
void drawEnd();
void moveEnd();
void drawFuelBar();
void fuelMessage();
void drawFuel();
int foot_y = 200;
int div_y = 220;
int end_y = 160;
int a = 0;
int speed = 1;
int steerSpeed = 1;
int temp = 0;
int seconds = 0;
int distance = 178;
int fuel = 178;
int game_state = 0;
void moveDivider();
void moveRoad();
void moveCar();
void periodicFunction(int);
void moveFuel();
int lane[MAX_CARS];
int pos[MAX_CARS];
int speeds[MAX_CARS];
int speedsTemp[MAX_CARS];
GLdouble width=1200, height=800;
bool carMoveLeft = false, carMoveRight = false, carMoveFast = false, carStopped = false, gameStopped = false, horn = false;
bool highlightStart = false, highlightExit = false;
bool reachedEnd = false, gameCompleted = false, fuelOver = false;
//Car variables
int car_x = 0;
int car_y = -100;
int fuel_x = 0;
int fuel_y = -80;
void maindisp()
{
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
switch(game_state)
{
case 1 : glClearColor(0.5, 0.5, 0.5, 0.0);
drawFootPath();
drawSurroundings();
drawDivider();
//drawEnd();
drawCar();
drawOther();
drawTime();
drawDistanceBar();
drawFuelBar();
drawFuel();
break;
case 0 : drawMainMenu();
break;
case 2 : glClearColor(0.5, 0.5, 0.5, 0.0);
drawFootPath();
drawSurroundings();
drawDivider();
if(gameCompleted)
drawEnd();
if(fuelOver)
fuelMessage();
drawCar();
drawOther();
drawDistanceBar();
drawFuelBar();
drawExitMenu();
drawTime();
break;
}
glFlush();
glutSwapBuffers();
}
void keyBoardFunc(int key, int x, int y)
{
switch(key)
{
case GLUT_KEY_LEFT : carMoveLeft = true; carMoveRight = false; break;
case GLUT_KEY_RIGHT : carMoveRight = true; carMoveLeft = false; break;
case GLUT_KEY_UP : carMoveFast = true; break;
}
}
void keyboard_up_func(int k, int x, int y)
{
switch(k)
{
case GLUT_KEY_LEFT: carMoveLeft=false;
break;
case GLUT_KEY_RIGHT:carMoveRight=false;
break;
case GLUT_KEY_UP : carMoveFast = false; break;
case GLUT_KEY_DOWN : carStopped = false; break;
}
}
void normalKeyBoardFunc(unsigned char key, int x, int y)
{
if(game_state == 1)
{
switch(key)
{
//Horn
case 'H':
case 'h': horn = true; break;
}
}
else if(game_state == 0)
{
if(key == 13)
{
setCars();
game_state = 1;
}
else if (key == 27){
exit(0);
}
}
}
void mouse_func(int button, int state, int x, int y)
{
switch(game_state)
{
case 0 : if(button == GLUT_LEFT_BUTTON && state == GLUT_UP)
{
if(x >= 630 && x <= 810 && y >= 320 && y <= 405)
{
//gameStopped = false;
setCars();
game_state = 1;
}
else if(x >= 630 && x <= 810 && y >= 490 && y <= 575)
exit(0);
}
break;
case 2 : if(button == GLUT_LEFT_BUTTON && state == GLUT_UP)
{
if(x >= 630 && x <= 810 && y >= 320 && y <= 405)
{
gameStopped = false;
gameCompleted = false;
reachedEnd = false;
seconds = 0;
distance = 178;
fuel = 178;
fuelOver = false;
end_y = 160;
setCars();
game_state = 1;
car_x = 0;
}
else if(x >= 630 && x <= 810 && y >= 490 && y <= 575)
exit(0);
}
break;
}
}
void mouse_hover(int x, int y)
{
if(x >= 630 && x <= 810 && y >= 320 && y <= 405)
{
highlightStart = true;
highlightExit = false;
}
else if(x >= 630 && x <= 810 && y >= 490 && y <= 575)
{
highlightStart = false;
highlightExit = true;
}
else
{
highlightExit = false;
highlightStart = false;
}
}
int main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH);
glutInitWindowSize((int) width, (int) height);
glutCreateWindow("Galaxian");
glutFullScreen();
gluOrtho2D(-240.0, 240.0, -160.0, 160.0);
glutDisplayFunc(maindisp);
glutTimerFunc(100, periodicFunction, 0);
glutSpecialFunc(keyBoardFunc);
glutSpecialUpFunc(keyboard_up_func);
glutKeyboardFunc(normalKeyBoardFunc);
glutMouseFunc(mouse_func);
glutPassiveMotionFunc(mouse_hover);
glutMainLoop();
return 0;
}
//This function draws a car at (car_x, car_y)
void drawCar(void)
{
glPushMatrix();
glTranslated(car_x, car_y, 0.0);
glColor3f(0.34, 1.0, 1.0);
glRectd(2, 10, -2, -10);
glRectf(-8, 12, 8, 13);
glRectf(-10.0, 9.0, -8.0, 15.0);
glRectf(8.0, 9.0, 10.0, 15.0);
glBegin(GL_LINES);
glVertex2f(8.0,11.0);
glVertex2f(6.0,7.0);
glVertex2f(6.0,7.0);
glVertex2f(6.0,-7.0);
glVertex2f(6.0,-7.0);
glVertex2f(10.0,-12.0);
glVertex2f(-8.0,11.0);
glVertex2f(-6.0,7.0);
glVertex2f(-6.0,7.0);
glVertex2f(-6.0,-7.0);
glVertex2f(-6.0,-7.0);
glVertex2f(-10.0,-12.0);
glVertex2f(10.0,-12.0);
glVertex2f(-10.0,-12.0);
glEnd();
glRectf(-11.0, -16.0, -9.0, -8.0);
glRectf(9.0, -16.0, 11.0, -8.0);
glRectf(-7.0, -14.0, -5.0, -12.0);
glRectf(5.0, -14.0, 7.0, -12.0);
glBegin(GL_POINTS);
glVertex2f(-7,-15);
glVertex2f(-5,-15);
glVertex2f(-8,-16);
glVertex2f(-4,-16);
glVertex2f(-6,-16);
glVertex2f(-6,-17);
glEnd();
glPopMatrix();
}
void drawOtherCars(int i)
{
glPushMatrix();
glTranslated((lane[i] - 1)*37, pos[i], 0.0);
switch(speeds[i])
{
case 2 : glColor3f(0.0, 1.0, 0.0); break;
case 3 : glColor3f(0.0, 0.0, 1.0); break;
case 4 :
case 5 :
case 6:
case 7 : glColor3f(1.0, 0.0, 0.0); break;
case 0 : glColor3f(0.0, 0.0, 0.0); break;
}
glRectd(2, 10, -2, -10);
glRectf(-8, 12, 8, 13);
glRectf(-10.0, 9.0, -8.0, 15.0);
glRectf(8.0, 9.0, 10.0, 15.0);
glBegin(GL_LINES);
glVertex2f(8.0,11.0);
glVertex2f(6.0,7.0);
glVertex2f(6.0,7.0);
glVertex2f(6.0,-7.0);
glVertex2f(6.0,-7.0);
glVertex2f(10.0,-12.0);
glVertex2f(-8.0,11.0);
glVertex2f(-6.0,7.0);
glVertex2f(-6.0,7.0);
glVertex2f(-6.0,-7.0);
glVertex2f(-6.0,-7.0);
glVertex2f(-10.0,-12.0);
glVertex2f(10.0,-12.0);
glVertex2f(-10.0,-12.0);
glEnd();
glRectf(-11.0, -16.0, -9.0, -8.0);
glRectf(9.0, -16.0, 11.0, -8.0);
glRectf(-7.0, -14.0, -5.0, -12.0);
glRectf(5.0, -14.0, 7.0, -12.0);
glBegin(GL_POINTS);
glVertex2f(-7,-15);
glVertex2f(-5,-15);
glVertex2f(-8,-16);
glVertex2f(-4,-16);
glVertex2f(-6,-16);
glVertex2f(-6,-17);
glEnd();
glPopMatrix();
}
void drawFootPath()
{
int i, y;
glPushMatrix();
//Draw right side foot path
glTranslated(60, 0, 0);
y = foot_y + 20;
for(i = 0; i < 20; i++)
{
if(a == 0)
{
if(i % 2 == 0)
glColor3f(1.0, 1.0, 1.0);
else
glColor3f(1.0, 1.0, 0.0);
}
else
{
if(i % 2 == 1)
glColor3f(1.0, 1.0, 1.0);
else
glColor3f(1.0, 1.0, 0.0);
}
y -= 20;
glRectd(5, y, -5, y - 20);
}
glPopMatrix();
//Draw left side foot path
glPushMatrix();
glTranslated(-60, 0, 0);
y = foot_y + 20;
for(i = 0; i < 20; i++)
{
if(a == 0)
{
if(i % 2 == 0)
glColor3f(1.0, 1.0, 1.0);
else
glColor3f(1.0, 1.0, 0.0);
}
else
{
if(i % 2 == 1)
glColor3f(1.0, 1.0, 1.0);
else
glColor3f(1.0, 1.0, 0.0);
}
y -= 20;
glRectd(5, y, -5, y - 20);
}
glPopMatrix();
}
void drawDivider()
{
int i;
int y = div_y + 80;
glColor3f(1.0, 1.0, 1.0);
for(i = 0 ; i < 8; i++)
{
y-=80;
glRectd(22, y, 18, y-40);
glRectd(-18, y, -22, y-40);
}
}
void drawSurroundings()
{
glColor3f(0.0, 1.0, 0.0);
glRectd(240, 160, 65, -160);
glRectd(-240, 160, -65, -160);
}
void stopGame()
{
speed = 0;
steerSpeed = 0;
}
void resumeGame()
{
speed = 2;
steerSpeed = 1;
}
void drawOther()
{
int i;
for(i = 0; i < MAX_CARS; i++)
{
drawOtherCars(i);
}
}
void setCars()
{
int i;
for(i = 0; i < MAX_CARS; i++)
{
lane[i] = i;
pos[i] = 110 + rand()%100;
speeds[i] = 1 + i + rand()%4;
}
}
void moveDivider()
{
div_y -= speed;
if(div_y < 120 && distance > 0)
{
div_y = 200;
if(carMoveFast)
{
distance -= 1.5;
fuel -=4;
}
else
{
distance -= 0.5;
fuel -= 2;
}
if(fuel < 0)
fuelOver = true;
if(distance < 5)
reachedEnd = true;
}
}
void moveCar()
{
if(carMoveLeft)
car_x -= steerSpeed;
else if(carMoveRight)
car_x += steerSpeed;
if(car_x > 45 || car_x < -45)
{
game_state = 2;
gameStopped = true;
}
}
void moveRoad()
{
foot_y -= speed;
if(foot_y < 160)
{
foot_y = 180;
if(a == 0)
a = 1;
else
a = 0;
}
}
void periodicFunction(int v)
{
if(gameStopped)
stopGame();
else
resumeGame();
if(speed != 0)
{
if(carMoveFast)
speed = 6;
else
speed = 2;
}
if(fuelOver)
{
gameStopped = true;
game_state = 2;
}
moveRoad();
moveDivider();
moveCar();
moveOtherCars();
moveEnd();
moveFuel();
if(!detectCollision() && !gameStopped && game_state == 1)
temp += 15;
if(temp > 1000)
{
temp = 0;
seconds++;
}
glutPostRedisplay();
glutTimerFunc(10, periodicFunction, v);
}
void moveOtherCars()
{
int i;
for(i = 0; i < MAX_CARS; i++)
{
pos[i] += -speed + speeds[i];
if(pos[i] < -200 || pos[i] > 200)
{
pos[i] = 200 + rand()%100;
speeds[i] = 2 + rand()%4;
}
}
if(horn)
{
speeds[(car_x + 60)/40]++;
if(speeds[(car_x + 60)/40] > 7)
speeds[(car_x + 60)/40] = 7;
horn = false;
}
}
int detectCollision()
{
if(game_state != 1)
return 0;
int i, limit;
for(i = 0; i < MAX_CARS; i++)
{
if(pos[i] < -70 && pos[i] > -130)
{
limit = (i - 1)*40;
if(car_x < limit + 22 && car_x > limit - 22)
{
speeds[i] = 0;
gameStopped = true;
game_state = 2;
return 1;
}
}
}
if((fuel_x > car_x && fuel_x - car_x < 20) || (fuel_x < car_x && car_x - fuel_x < 20))
{
if(fuel_y < -80 && fuel_y > -120)
{
fuel+=40;
if(fuel > 178)
fuel = 178;
fuel_y = 600 + rand()%150;
fuel_x = (rand()%3 - 1)*37;
}
}
return 0;
}
void draw_string(std::string str)
{
for(unsigned int i=0;i<str.length();i++)
{
glutStrokeCharacter(GLUT_STROKE_ROMAN, *(str.begin()+i));
}
}
void drawMainMenu()
{
//Draw start button
glClearColor(0.5, 0.5, 0.5, 0.0);
glColor3f(0.0, 0.0, 0.0);
drawFootPath();
drawSurroundings();
drawDivider();
drawCar();
glColor3f(1.0, 1.0, 1.0);
glPushMatrix();
glTranslated(0, 30, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(30, 15);
glVertex2f(30, -15);
glVertex2f(-30, -15);
glVertex2d(-30, 15);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslated(-20, 30, 0);
glScalef(0.1, 0.1, 0.1);
glColor3f(1.0, 1.0, 1.0);
draw_string("START");
glPopMatrix();
//Draw exit button
glColor3f(1.0, 1.0, 1.0);
glPushMatrix();
glTranslated(0, -30, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(30, 15);
glVertex2f(30, -15);
glVertex2f(-30, -15);
glVertex2d(-30, 15);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslated(-15, -30, 0);
glScalef(0.1, 0.1, 0.1);
draw_string("EXIT");
glPopMatrix();
if(highlightStart)
{
glColor3f(1.0, 0.0, 0.0);
glPushMatrix();
glTranslated(0, 30, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(35, 20);
glVertex2f(35, -20);
glVertex2f(-35, -20);
glVertex2d(-35, 20);
glEnd();
glPopMatrix();
}
if(highlightExit)
{
glColor3f(1.0, 0.0, 0.0);
glPushMatrix();
glTranslated(0, -30, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(35, 20);
glVertex2f(35, -20);
glVertex2f(-35, -20);
glVertex2d(-35, 20);
glEnd();
glPopMatrix();
}
}
void drawExitMenu()
{
//Draw start button
glColor3f(1.0, 1.0, 1.0);
glPushMatrix();
glTranslated(0, 30, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(30, 15);
glVertex2f(30, -15);
glVertex2f(-30, -15);
glVertex2d(-30, 15);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslated(-25, 30, 0);
glScalef(0.1, 0.1, 0.1);
glColor3f(1.0, 1.0, 1.0);
draw_string("RESTART");
glPopMatrix();
//Draw exit button
glColor3f(1.0, 1.0, 1.0);
glPushMatrix();
glTranslated(0, -30, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(30, 15);
glVertex2f(30, -15);
glVertex2f(-30, -15);
glVertex2d(-30, 15);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslated(-15, -30, 0);
glScalef(0.1, 0.1, 0.1);
draw_string("EXIT");
glPopMatrix();
if(highlightStart)
{
glColor3f(1.0, 0.0, 0.0);
glPushMatrix();
glTranslated(0, 30, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(35, 20);
glVertex2f(35, -20);
glVertex2f(-35, -20);
glVertex2d(-35, 20);
glEnd();
glPopMatrix();
}
if(highlightExit)
{
glColor3f(1.0, 0.0, 0.0);
glPushMatrix();
glTranslated(0, -30, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(35, 20);
glVertex2f(35, -20);
glVertex2f(-35, -20);
glVertex2d(-35, 20);
glEnd();
glPopMatrix();
}
}
void drawTime()
{
glColor3f(1.0, 1.0, 1.0);
glPushMatrix();
glTranslated(-200, 90, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(50, 15);
glVertex2f(50, -15);
glVertex2f(-30, -15);
glVertex2d(-30, 15);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslated(-220, 85, 0);
glScalef(0.1, 0.1, 0.1);
glColor3f(1.0, 1.0, 1.0);
draw_string("SCORE: ");
glPopMatrix();
glPushMatrix();
glTranslated(-180, 85, 0);
glScalef(0.1, 0.1, 0.1);
glColor3f(1.0, 0.0, 0.0);
//glutStrokeCharacter(GLUT_STROKE_ROMAN, '4');
drawScore(seconds);
glPopMatrix();
}
void drawScore(int score)
{
int temp = score;
int str[20],i=0;
while(temp>0)
{
str[i++] = (temp%10);
temp /= 10;
}
i--;
while(i>=0)
{
glutStrokeCharacter(GLUT_STROKE_ROMAN, str[i--]+'0');
}
if(score == 0) glutStrokeCharacter(GLUT_STROKE_ROMAN, '0');
}
void drawDistanceBar()
{
glPushMatrix();
glColor3f(0.0, 0.0, 0.0);
glTranslated(-75, 40, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(5, 90);
glVertex2f(5, -90);
glVertex2f(-5, -90);
glVertex2d(-5, 90);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslated(-75, -49, 0);
glColor3f(0.6, 0.6, 0.6);
glRectd(4, 0, -4, distance);
glPopMatrix();
}
void drawFuelBar()
{
glPushMatrix();
glColor3f(0.0, 0.0, 0.0);
glTranslated(75, 40, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(5, 90);
glVertex2f(5, -90);
glVertex2f(-5, -90);
glVertex2d(-5, 90);
glEnd();
glPopMatrix();
glPushMatrix();
glTranslated(75, -49, 0);
glColor3f(0.6, 0.6, 0.6);
glRectd(4, 0, -4, fuel);
glPopMatrix();
}
void drawEnd()
{
int i, j;
for(i = 0; i < 5; i++)
{
if(i % 2 == 0)
glColor3f(0.0, 0.0, 0.0);
else
glColor3f(1.0, 1.0, 1.0);
glPushMatrix();
glTranslated(-55 , end_y + 10*i, 0);
for(j = 0; j < 11; j++)
{
if(i%2)
{
if(j % 2 == 0)
glColor3f(0.0, 0.0, 0.0);
else
glColor3f(1.0, 1.0, 1.0);
}
else
{
if(j % 2)
glColor3f(0.0, 0.0, 0.0);
else
glColor3f(1.0, 1.0, 1.0);
}
glRectd(10 * j,0,10*(j+1),10);
}
glPopMatrix();
}
}
void fuelMessage()
{
glPushMatrix();
glTranslated(75, -70, 0);
glScalef(0.1,0.1,0.1);
glColor3f(1.0, 0,0);
draw_string("Fuel Exhausted\n");
glPopMatrix();
}
void moveEnd()
{
if(reachedEnd)
end_y-= speed;
if(end_y < -125)
{
gameStopped = true;
gameCompleted = true;
game_state = 2;
}
}
void drawFuel()
{
glPushMatrix();
glTranslated(fuel_x, fuel_y, 0);
glColor3f(0.0, 1.0, 0.0);
glRectf(5, 5, -5, -5);
glPopMatrix();
glPushMatrix();
glTranslated(fuel_x, fuel_y+5, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(5, 0);
glVertex2f(5, 5);
glVertex2f(-3, 5);
glVertex2d(-5, 0);
glEnd();
glPopMatrix();
}
void moveFuel()
{
fuel_y-=speed;
if(fuel_y < -200)
{
fuel_y = 600 + rand()%150;
fuel_x = (rand()%3 - 1)*37;
}
}
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