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#1 Jac0blee   Members   -  Reputation: 100

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Posted 12 February 2012 - 05:52 PM

Hi this is my first forum post,

as of now i have developed one game that i will share with you all soon, im working on a second game that uses finite ai (the bad guys move towards you) and was wondering how to make walls and how to have a tiled background move correctly with the player and enemies heres the code for the game:
#include <allegro5\allegro.h>
#include <allegro5\allegro_image.h>
#include <allegro5\allegro_primitives.h>
#include <allegro5\allegro_font.h>
#include <allegro5\allegro_ttf.h>
#include <iostream>
#include <math.h>
#include "classes.h"
using namespace std;
const int WIDTH = 800;
const int HEIGHT = 600;
const int NUM_BULLETS = 10;
const int NUM_BADDIES = 50;
int num;
bool movingMap = true;
const int cavex = WIDTH - 100;
const int cavey = HEIGHT / 2;
bool keys[] = {false, false, false, false, false};
enum KEYS{UP, DOWN, LEFT, RIGHT, SPACE};
enum STATE{IDLE, CHASING, RETREATING, ENTERING};
ALLEGRO_FONT *font18;
void ChangeState(int &state, int newState);
float CheckDistance(int x1, int y1, int x2, int y2);
float AngleToTarget(int x1, int y1, int x2, int y2);
void IsPlayerDead(Player &player, Enemy bad[]);
void InitPlayer(Player &player);
void MovePlayerRight(Player &player);
void MovePlayerLeft(Player &player);
void MovePlayerUp(Player &player);
void MovePlayerDown(Player &player);
//void ResetPlayerDir(Player &player);
void InitEnemy(Enemy bad[]);
void StartEnemy(Enemy bad[]);
void InitBullet(Bullet bullets[], int size);
void FireBullet(Bullet bullets[], Player &player, int size);
void DrawBullet(Bullet bullets[], int size);
void UpdateBullet(Bullet bullets[], int size);
void CollideBullet(Bullet bullets[], int size, Enemy bad[]);
int main(int argc, char **argv)
{
//==============================================
//SHELL VARIABLES
//==============================================
bool done = false;
bool render = false;
float gameTime = 0;
int frames = 0;
int gameFPS = 0;

int xOff = 0;
int yOff = 0;
int mapColumns = 10;
int mapSize = 100;
int tileSize = 100;
int map[] = {0, 1, 1, 1, 0, 0, 1, 1, 0, 0,
	 0, 1, 0, 0, 1, 1, 0, 0, 1, 0,
	 0, 1, 0, 0, 1, 1, 0, 0, 0, 1,
	 0, 1, 1, 1, 1, 1, 1, 1, 0, 0,
	 0, 0, 0, 1, 1, 1, 1, 1, 0, 0,
	 1, 1, 0, 1, 1, 1, 0, 0, 0, 0,
	 0, 1, 0, 0, 1, 1, 0, 0, 1, 0,
	 1, 1, 1, 0, 1, 1, 0, 0, 0, 1,
	 0, 1, 0, 0, 1, 1, 0, 0, 1, 0,
	 0, 0, 1, 1, 1, 1, 1, 1, 0, 0};
//==============================================
//PROJECT VARIABLES
//==============================================
Player player;
Enemy bad[NUM_BADDIES];
Bullet bullets[NUM_BULLETS];
int state = -1;
int threshold = 200;
//==============================================
//ALLEGRO VARIABLES
//==============================================
ALLEGRO_DISPLAY *display = NULL;
ALLEGRO_EVENT_QUEUE *event_queue = NULL;
ALLEGRO_TIMER *timer;
ALLEGRO_BITMAP *bgSheet = NULL;


//==============================================
//ALLEGRO INIT FUNCTIONS
//==============================================
if(!al_init())		  //initialize Allegro
  return -1;
display = al_create_display(WIDTH, HEIGHT);   //create our display object
if(!display)		  //test display object
  return -1;
//==============================================
//ADDON INSTALL
//==============================================
al_install_keyboard();
al_init_image_addon();
al_init_font_addon();
al_init_ttf_addon();
al_init_primitives_addon();

//==============================================
//PROJECT INIT
//==============================================
font18 = al_load_font("grunge.ttf", 50, 0);
bgSheet = al_load_bitmap("Background.bmp");
InitPlayer(player);
InitEnemy(bad);
InitBullet(bullets, NUM_BULLETS);
al_install_mouse();
ChangeState(state, IDLE);
//==============================================
//TIMER INIT AND STARTUP
//==============================================
event_queue = al_create_event_queue();
timer = al_create_timer(1.0 / 60);
al_register_event_source(event_queue, al_get_timer_event_source(timer));
al_register_event_source(event_queue, al_get_keyboard_event_source());
al_register_event_source(event_queue, al_get_mouse_event_source());
al_start_timer(timer);
gameTime = al_current_time();
while(!done)
{
  ALLEGRO_EVENT ev;
  al_wait_for_event(event_queue, &ev);
  //==============================================
  //INPUT
  //==============================================
  if(ev.type == ALLEGRO_EVENT_KEY_DOWN)
  {
   switch(ev.keyboard.keycode)
   {
   case ALLEGRO_KEY_ESCAPE:
    done = true;
    break;
   case ALLEGRO_KEY_LEFT:
    player.dirX = -1;
    player.dirY = 0;
    keys[LEFT] = true;
    break;
   case ALLEGRO_KEY_RIGHT:
    player.dirX = 1;
    player.dirY = 0;
    keys[RIGHT] = true;
    break;
   case ALLEGRO_KEY_UP:
    player.dirY = -1;
    player.dirX = 0;
    keys[UP] = true;
    break;
   case ALLEGRO_KEY_DOWN:
    player.dirY = 1;
    player.dirX = 0;
    keys[DOWN] = true;
    break;
   case ALLEGRO_KEY_SPACE:
    keys[SPACE] = true;
    FireBullet(bullets, player, NUM_BULLETS);
    break;
   }
  }
  else if(ev.type == ALLEGRO_EVENT_KEY_UP)
  {
   switch(ev.keyboard.keycode)
   {
   case ALLEGRO_KEY_ESCAPE:
    done = true;
    break;
   case ALLEGRO_KEY_LEFT:
    keys[LEFT] = false;
    break;
   case ALLEGRO_KEY_RIGHT:
    keys[RIGHT] = false;
    break;
   case ALLEGRO_KEY_UP:
    keys[UP] = false;
    break;
   case ALLEGRO_KEY_DOWN:
    keys[DOWN] = false;
    break;
   case ALLEGRO_KEY_SPACE:
    keys[SPACE] = false;
    break;
   }
  }
  else if(ev.type == ALLEGRO_EVENT_MOUSE_AXES)
  {
   //playerx = ev.mouse.x;
   //playery = ev.mouse.y;
  }
  //==============================================
  //GAME UPDATE
  //==============================================
  else if(ev.type == ALLEGRO_EVENT_TIMER)
  {
  
   if(player.live == true)
   {
   if(xOff + (tileSize * mapColumns) > WIDTH)
    xOff -= keys[RIGHT] * player.speed;
   if(xOff < 0)
    xOff += keys[LEFT] * player.speed;
   if(yOff + (tileSize * mapColumns) > HEIGHT)
    yOff -= keys[DOWN] * player.speed;
   if(yOff < 0)
    yOff += keys[UP] * player.speed;

   }
   // moving the player

    if(keys[UP] == true)
	 MovePlayerUp(player);
    else if(keys[DOWN] == true)
	 MovePlayerDown(player);
    if(keys[LEFT] == true)
	 MovePlayerLeft(player);
    else if(keys[RIGHT] == true)
	 MovePlayerRight(player);
   StartEnemy(bad);
   IsPlayerDead(player, bad);
   UpdateBullet(bullets, NUM_BULLETS);
   CollideBullet(bullets, NUM_BULLETS, bad);
   if(!player.live)
   {
    al_draw_textf(font18, al_map_rgb(255,255,0), WIDTH - 600, 10, 0, "You are Dead!");
   }
   render = true;
   //UPDATE FPS===========
   frames++;
   if(al_current_time() - gameTime >= 1)
   {
    gameTime = al_current_time();
    gameFPS = frames;
    frames = 0;
   }
   //=====================
   for(int i = 0; i < NUM_BADDIES; i++)
   {
   if(bad[i].live)
   {
  // if(state == IDLE)
  // {
  //  if(threshold > CheckDistance(player.x, player.y, bad.x, bad.y))
  //   ChangeState(state, CHASING);   
  // }
   /*else*/ //if(state == CHASING)
  // {
 
   // if(threshold < CheckDistance(bad.x, bad.y, cavex, cavey))
  //  {
//    ChangeState(state, RETREATING);
//   }
    //else
    //{
	 float angle = AngleToTarget(bad[i].x, bad[i].y, player.x, player.y);
	 bad[i].y += (bad[i].speed * sin(angle));
	 bad[i].x += (bad[i].speed * cos(angle));
	 // if(threshold < CheckDistance(player.x, player.y, bad.x, bad.y))
	 //  ChangeState(state, RETREATING);
    //}
  // }
   /*else if(state == RETREATING)
   {
    if(2 >= CheckDistance(bad.x, bad.y, cavex, cavey))
    {
	 bad.x = cavex;
	 bad.y = cavey;
	 ChangeState(state, IDLE);
    }
    else
    {
	 float angle = AngleToTarget(bad.x, bad.y, cavex, cavey);
	 bad.y += (2 * sin(angle));
	 bad.x += (2 * cos(angle));
	 if(threshold > CheckDistance(bad.x, bad.y, player.x, player.y))
	  ChangeState(state, CHASING);
    }
   }*/
   }
   else if(!bad[i].live)
   {
    bad[i].x = -10;
    bad[i].y = -10;
   }
   }
  }
  //==============================================
  //RENDER
  //==============================================
  if(render && al_is_event_queue_empty(event_queue))
  {
   for(int i = 0; i < mapSize; i++)
   {
    al_draw_bitmap_region(bgSheet, tileSize * map[i], 0, tileSize, tileSize, xOff + tileSize * (i %  mapColumns), yOff + tileSize * (i /  mapColumns), 0);
   }
   render = false;
   al_draw_textf(font18, al_map_rgb(255 ,0 ,255), 5, 5, 0, "FPS: %i", gameFPS); //display FPS on screen
   al_draw_textf(font18, al_map_rgb(255 ,0 ,255), 100, 5, 0, "Lives: %i", player.lives / 10);
   al_draw_textf(font18, al_map_rgb(255 ,0 ,255), 100, 20, 0, "SPAWN: %i", num);
   //BEGIN PROJECT RENDER================
   if(player.live)
   {
    al_draw_filled_rectangle(player.x - 10, player.y - 10, player.x + 10, player.y + 10, al_map_rgba_f(.3,0,.2,.5));
   }
   DrawBullet(bullets, NUM_BULLETS);
   al_draw_textf(font18, al_map_rgb(255,0,255), 5, 50, 0, "Player dirX: %i PlayerdirY: %i", player.dirX, player.dirY);
   for(int i = 0; i < NUM_BADDIES; i++)
   {
   if(bad[i].live)
   {
   al_draw_filled_rectangle(bad[i].x - 10, bad[i].y - 10, bad[i].x + 10, bad[i].y + 10, al_map_rgba_f(.5,0,.5,.5));
   al_draw_rectangle(player.x - player.boundx, player.y - player.boundy, player.x + player.boundx, player.y + player.boundy, al_map_rgb(0,0,255), 1);
   al_draw_rectangle(bad[i].x - bad[i].boundx, bad[i].y - bad[i].boundy, bad[i].x + bad[i].boundx, bad[i].y + bad[i].boundy, al_map_rgb(0,0,255), 1);
   }
   }
   //FLIP BUFFERS========================
  
   //ResetPlayerDir(player);
   al_flip_display();
   al_clear_to_color(al_map_rgb(0,0,0));
  }
}
//==============================================
//DESTROY PROJECT OBJECTS
//==============================================
//SHELL OBJECTS=================================
al_destroy_font(font18);
al_destroy_timer(timer);
al_destroy_event_queue(event_queue);
al_destroy_display(display);
return 0;
}
void ChangeState(int &state, int newState)
{
if(state == IDLE)
{
  cout << "leaving IDLE state" << endl;
}
else if(state == CHASING)
{
  cout << "leaving CHASING state" << endl;
}
else if(state == RETREATING)
{
  cout << "leaving RETREATING state" << endl;
}
state = newState;
if(state == IDLE)
{
  cout << "now IDLING" << endl;
}
else if(state == CHASING)
{
  cout << "now CHASING" << endl;
}
else if(state == RETREATING)
{
  cout << "now RETREATING" << endl;
}
}
float CheckDistance(int x1, int y1, int x2, int y2)
{
return sqrt(pow((float)x1 - x2, 2) + pow((float)y1 - y2, 2));
}
float AngleToTarget(int x1, int y1, int x2, int y2)
{
float deltaX = (x2 - x1);
float deltaY = (y2 - y1);
return atan2(deltaY, deltaX);
}
void InitPlayer(Player &player)
{
player.x = 10;
player.y = WIDTH / 2;
player.dirX = 0;
player.dirY = 0;
player.boundx = 10;
player.boundy = 10;
player.speed = 5;
player.live = true;
player.lives = 200;
}
void MovePlayerUp(Player &player)
{
//player.animationRow = 0;
if(player.live)
{
player.y -= player.speed;
if(player.y < 0)
  player.y = 0;
}
player.dirY = 1;
}
void MovePlayerDown(Player &player)
{
if(player.live)
{
//player.animationRow = 2;
player.y += player.speed;
if(player.y > HEIGHT)
  player.y = HEIGHT;
}
player.dirY = -1;
}
void MovePlayerLeft(Player &player)
{
if(player.live)
{
//player.curFrame = 2;
player.x -= player.speed;
if(player.x < 0)
  player.x = 0;
}
player.dirX = -1;
}
void MovePlayerRight(Player &player)
{
if(player.live)
{
//player.curFrame = 1;
player.x += player.speed;
if(player.x > WIDTH)
  player.x = WIDTH;
}
player.dirX = 1;
}
/*void ResetPlayerDir(Player &player)
{
player.dirX = 0;
player.dirY = 0;
}*/
void IsPlayerDead(Player &player, Enemy bad[])
{
for(int i = 0; i < NUM_BADDIES; i++)
{
if(bad[i].x - bad[i].boundx < player.x + player.boundx &&
    bad[i].x + bad[i].boundx > player.x - player.boundx &&
    bad[i].y - bad[i].boundy < player.y + player.boundy &&
    bad[i].y + bad[i].boundy > player.y - player.boundy)
{
  if(player.live)
  {
  al_draw_textf(font18, al_map_rgb(255,0,0), (WIDTH / 2) - 200, 10, 0, "BITTEN");
  //player.lives--;
  }
  if(player.lives <= 0)
   player.live = false;
}
}
}
void InitEnemy(Enemy bad[])
{
for(int i = 0; i < NUM_BADDIES; i++)
{
bad[i].boundx = 10;
bad[i].boundy = 10;
bad[i].live = false;
}
}
void StartEnemy(Enemy bad[])
{
for(int i = 0; i < NUM_BADDIES; i++)
{
  if(!bad[i].live)
  {
   if(rand() % 10 == 0)
   {
    if(rand() % 200 == 0)
    {
    bad[i].live = true;
    bad[i].x = 30 + rand() % WIDTH;
    bad[i].y = 0;
    bad[i].speed = rand() % 3 + 2;
    num = 0;
    }
   
    if(rand() % 4 == 1)
    {
    bad[i].live = true;
    bad[i].x = 0;
    bad[i].y = 30 + rand() % HEIGHT;
    bad[i].speed = rand() % 3 + 2;
    num = 1;
    }
   
    if(rand() % 4 == 2)
    {
    bad[i].live = true;
    bad[i].x = WIDTH;
    bad[i].y = 30 + rand() % HEIGHT;
    bad[i].speed = rand() % 3 + 2;
    num = 2;
    }
   
    if(rand() % 4 == 3)
    {
    num = 3;
    bad[i].live = true;
    bad[i].x = 30 + rand() % WIDTH;
    bad[i].y = HEIGHT;
    bad[i].speed = rand() % 3 + 2;
    }
   }
  }
}
}
void InitBullet(Bullet bullets[], int size)
{
for(int i = 0; i < size; i++)
{
  bullets[i].speed = 10;
  bullets[i].dirX = 0;
  bullets[i].dirY = 0;
  bullets[i].live = false;
}
}
void FireBullet(Bullet bullets[], Player &player, int size)
{
 
for(int i = 0; i < size; i++)
{
  if(!bullets[i].live)
  {
   cout << "firing Bullet!" << endl;
   if(player.dirX == 1)
   {
    bullets[i].live = true;
    bullets[i].dirX = 1;
    bullets[i].x = player.x + 2;
    bullets[i].y = player.y;
    break;
   }
   else if(player.dirX == -1)
   {
    bullets[i].dirX = -1;
    bullets[i].x = player.x - 2;
    bullets[i].y = player.y;
    bullets[i].live = true;
    break;
   }
   else if(player.dirY == 1)
   {
    bullets[i].dirY = 1;
    bullets[i].y = player.y - 2;
    bullets[i].x = player.x;
    bullets[i].live = true;
    break;
   }
   else if(player.dirY == -1)
   {
    bullets[i].live = true;
    bullets[i].dirY = -1;
    bullets[i].y = player.y + 2;
    bullets[i].x = player.x;
    break;
   }
  }
}
}
void DrawBullet(Bullet bullets[], int size)
{
for(int i = 0; i < size; i++)
{
  if(bullets[i].live)
   al_draw_filled_rectangle(bullets[i].x, bullets[i].y + 3, bullets[i].x - 4, (bullets[i].y - 4) + 3, al_map_rgb(255,0,255));
}
}
void UpdateBullet(Bullet bullets[], int size)
{
for(int i = 0; i < size; i++)
{
  if(bullets[i].live == true)
  {
   if(bullets[i].dirX == 1)
   {
    bullets[i].x += bullets[i].speed;
    if(bullets[i].x > WIDTH)
    {
	 bullets[i].live = false;
	 cout << "bullet went out of bounds!" << endl;
	 bullets[i].dirX = 0;
	 bullets[i].dirY = 0;
    }
   }
   else if(bullets[i].dirX == -1)
   {
    bullets[i].x -= bullets[i].speed; 
    if(bullets[i].x < 0)
    {
	 bullets[i].live = false;
	 cout << "bullet went out of bounds!" << endl;
	 bullets[i].dirX = 0;
	 bullets[i].dirY = 0;
    }
   }
   else if(bullets[i].dirY == -1)
   {
    bullets[i].y += bullets[i].speed;
    if(bullets[i].y > HEIGHT)
    {
	 bullets[i].live = false;
	 cout << "bullet went out of bounds!" << endl;
	 bullets[i].dirX = 0;
	 bullets[i].dirY = 0;
    }
   }
   else if(bullets[i].dirY == 1)
   {
    bullets[i].y -= bullets[i].speed;
    if(bullets[i].y < 0)
    {
	 bullets[i].live = false;
	 bullets[i].dirX = 0;
	 bullets[i].dirY = 0;
	 cout << "bullet went out of bounds!" << endl;
    }
   }
   /*
   if(bullets[i].dirX == -1 && bullets[i].dirY == -1)
   {
    bullets[i].y -= (bullets[i].speed / 2);
    bullets[i].x -= (bullets[i].speed / 2);
    if(bullets[i].y < 0)
    {
	 bullets[i].live = false;
	 bullets[i].dirX = 0;
	 bullets[i].dirY = 0;
	 cout << "bullet went out of bounds!" << endl;
    }
    if(bullets[i].x < 0)
    {
	 bullets[i].live = false;
	 bullets[i].dirX = 0;
	 bullets[i].dirY = 0;
	 cout << "bullet went out of bounds!" << endl;
    }
   }*/
  }
}
}
void CollideBullet(Bullet bullets[], int size, Enemy bad[])
{
for(int i = 0; i < size; i++)
{
  if(bullets[i].live)
  {
   for(int j = 0; j < NUM_BADDIES; j++)
   {
   if(bad[j].live)
   {
    if(bullets[i].x > bad[j].x - bad[j].boundx &&
	 bullets[i].x < bad[j].x + bad[j].boundx &&
	 bullets[i].y > bad[j].y - bad[j].boundy &&
	 bullets[i].y < bad[j].y + bad[j].boundy)
    {
	 bullets[i].live = false;
	 bad[j].live = false;
	 cout <<"you got him!" << endl;
	 break;
    }
   }
   }
  }
}
}
//	    --Header file classes.h--
struct Player
{
int x;
int y;
int dirX;
int dirY;
int boundx;
int boundy;
int speed;
int lives;
bool live;
};
struct Enemy
{
int x;
int y;
int speed;
int boundx;
int boundy;
bool live;
};
struct Bullet
{
int x;
int y;
int dirX;
int dirY;
int speed;
bool live;
};
thank you.
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