File content as of revision 7:72119ea3b3b1:

#include "Game_engine.h"
#include "Snake.h"

GameEngine::GameEngine() {
}

GameEngine::~GameEngine() {
}
Snake snake;

void GameEngine::init() {
    snake.init();
    _game_cont = true;
    snake.set_food_posX((rand()%(19) + 1) * 4);
    snake.set_food_posY((rand()%(11) + 1) * 4 - 2);
    _body_seg = 1;
}
void GameEngine::draw(N5110 &lcd) {    
    lcd.drawRect(0,0,WIDTH,HEIGHT,FILL_TRANSPARENT); // Draws screen limits
    snake.draw_head(lcd);
    snake.draw_food(lcd);
}

void GameEngine::get_dir(Gamepad &gamepad) {
    if ( gamepad.check_event(Gamepad::Y_PRESSED) && _direction != 1) {
        _direction = 0;
    }
    else if ( gamepad.check_event(Gamepad::A_PRESSED) && _direction != 0) {
        _direction = 1;
    }
    else if ( gamepad.check_event(Gamepad::X_PRESSED) && _direction != 3) {
        _direction = 2;
    }
    else if ( gamepad.check_event(Gamepad::B_PRESSED) && _direction != 2) {
        _direction = 3;
    }
}

void GameEngine::snake_move() {
    if (_direction == 0) {
        snake.set_snake_posY (snake.get_snake_posY()- 4);    
    } else if (_direction == 1) {
        snake.set_snake_posY (snake.get_snake_posY()+ 4);   
    } else if (_direction == 2) {
        snake.set_snake_posX (snake.get_snake_posX()- 4); 
    } else if (_direction == 3) {
        snake.set_snake_posX (snake.get_snake_posX()+ 4); 
    }
}

void GameEngine::food_move() {
    srand(time(NULL));
    if(snake.get_snake_posX() == snake.get_food_posX() && snake.get_snake_posY() == snake.get_food_posY()) {
        snake.set_food_posX((rand()%(19) + 1) * 4);
        snake.set_food_posY((rand()%(11) + 1) * 4 - 2);
        for (int k = _body_seg; k > 0; k--) {
            if((_body_posX[k] == snake.get_food_posX() && _body_posY[k] == snake.get_food_posY()) || (snake.get_snake_posX() == snake.get_food_posX() && snake.get_snake_posY() == snake.get_food_posY())) {
                snake.set_food_posX((rand()%(19) + 1) * 4);
                snake.set_food_posY((rand()%(11) + 1) * 4 - 2);   
            } 
        }
        _body_seg = _body_seg + 1;
    }    
}
void GameEngine::snake_body(N5110 &lcd) {
    _body_posX[0] = snake.get_snake_posX();
    _body_posY[0] = snake.get_snake_posY();
    for (int j = _body_seg; j > 0; j--) {
        lcd.drawRect(_body_posX[j],_body_posY[j],4,4,FILL_BLACK); 
        _body_posX[j] = _body_posX[j-1];
        _body_posY[j] = _body_posY[j-1];   
    }
}

void GameEngine::check_wall_collision() {
    if (snake.get_snake_posX() == 0 || snake.get_snake_posX() > 80 || snake.get_snake_posY() < 0 || snake.get_snake_posY() > 44) {
        _game_cont = false;
    }    
}

void GameEngine::check_snake_collision() {
    for (int i = _body_seg; i > 1; i--) {
        if (_body_posX[i] == snake.get_snake_posX() && _body_posY[i] == snake.get_snake_posY()) {
            _game_cont = false;
        }   
    }
   
}

// accessor
bool GameEngine::get_game_cont() {
    return _game_cont;    
}