File content as of revision 11:b25874e7efe4:

#include "Engine.h"

Engine::Engine()
{

}

Engine::~Engine()
{

}

void Engine::init()     // initialise the game parameters
{
    memset(_grid, 0, sizeof(_grid));
    _solid.init(5,15);
    _noodles.init(10,10);
}

void Engine::read_input(Gamepad &pad)
{
    _d = pad.get_direction();
}

void Engine::draw(N5110 &lcd)
{
    lcd.drawRect(0,0,48,48,FILL_TRANSPARENT);

    for (int j = 0; j < 22; j++) {
        for (int i = 0; i < 22; i++) {
            if (_grid[i][j] != 0) {
                lcd.drawRect((2 * i) + 2,(2 * j) + 2,2,2,FILL_BLACK);
            }
        }
    }

    lcd.printString("Score",50,0);


    int _score = (_solid.getLength() - 3);

    char buffer1[21];
    sprintf(buffer1,"%3d",_score);
    lcd.printString(buffer1,50,1);  // font is 8 wide, so leave 4 pixel gape from middle assuming two digits
    
    if (_gameOver) {
        for (int i = 0; i < 22; i++) {
            for (int j = 0; j < 22; j++) {
                lcd.drawRect((2 * i) + 3,(2 * j) + 3,2,2,FILL_BLACK);
                wait(0.01);
                lcd.refresh();
            }
        }
    }

}

void Engine::update(Gamepad &pad)
{
    memset(_grid, 0, sizeof(_grid));

    _solid.update(_d);

    int _l =_solid.getLength();

    for (int z = 0; z < _l; z++) {

        if (_solid.getX(z) > 21 || _solid.getX(z) < 0) {
            _gameOver = true;
        } else if (_solid.getY(z) > 21 || _solid.getY(z) < 0) {
            _gameOver = true;
        }

        if (_grid[_solid.getX(z)][_solid.getY(z)] != 1) {
            _grid[_solid.getX(z)][_solid.getY(z)] = 1;
        } else {
            _gameOver = true;
        }
    }

    _grid[_noodles.getY()][_noodles.getY()] = 2;

    if (_grid[_solid.getX(0)][_solid.getY(0)] == 2) { //checks if the head has reached food
        if (_solid.getLength()<484) { //checks if the snake can grow any more

            _solid.grow();  //makes snake longer

            bool empty = false; //makes a varible for finding an empty square
            while (!empty) {    //loops until empty square found
                _noodles.random(); //randomise position of noodles
                if ( _grid[_noodles.getY()][_noodles.getY()] == 0) {
                    empty = true; //stops looping when free space is found
                    // no need to set the grid as it will put the noodles in the new location the next time 'update' is called
                }
            }
        }
    }
}

int Engine::getScore(){
    return _score;
    }