File content as of revision 1:897160a1a3ae:

#include "snake.h"

Snake::Snake()
{

}

Snake::~Snake()
{

}


void Snake::init ()
{

    //WIDTH =84 HEIGHT = 42 //snakebody[0] is initialised may have to initilaise the other 2 og snake parts
    _length = 1;
    _gameover = false;
    _score = 0;
    _direction = up;

}



int Snake::set_direction(Gamepad &pad)     //int type as Directions is an enum
{

    Directions _direction;


    if (pad.A_pressed()) {

        _direction = right;


    }

    if (pad.B_pressed()) {

        _direction = left;     //check these are orrecrt

    }

    if (pad.X_pressed()) {

        _direction = up;

    }

    if (pad.Y_pressed()) {


        _direction = down;

    }

    else {

        _direction = _direction;
    }
    return _direction;
}


void Snake::move_and_draw_snake(N5110 &lcd)
{
    Vector2D Snakehead = _engine.get_Snakehead();           //initialises Snakehead value
    Vector2D *snakebody = new Vector2D [_length];

    snakebody[0].x = Snakehead.x;
    snakebody[0].y = Snakehead.y;

    while(1) {
        if (_direction == up) {
            Snakehead.y++;                              // alters Snakehead initial value
        }
        if (_direction == down) {             //this part is needed to keep the snake running continually
            Snakehead.y--;
        }
        if (_direction == left) {
            Snakehead.x--;
        }
        if (_direction == right) {
            Snakehead.x++;                         //updates the head position before rendering so when it draws i=1 the 0 position will be new
        }

        for(int i=1; i<=_length; i++) {                     //0 being head of snake  so snakepos[1]=snakepos[0] which is the head - moving up one place
            snakebody[i].x = snakebody[i-1].x;
            snakebody[i].y = snakebody[i-1].y;
            lcd.setPixel(snakebody[i].x, snakebody[i].y, 1);
            if(snakebody[i].x == Snakehead.x && snakebody[i].y == Snakehead.y) {  //is snakebody[0] being plotted
                _gameover = true;

            }
        }
    }


}


void Snake::gameover_true(N5110 &lcd)      //taking action if crash has occured
{
    if (_gameover == true) {

        lcd.clear();
        lcd.refresh();
        lcd.printString( "  Game Over L ", 0, 2 );
        lcd.printString ("score: _score ",15, 15);    //Need to add button to return to main screen / restart

    }

    else {


    }
}



void Snake::check_if_scored(N5110 &lcd, Gamepad &pad)
{
    Vector2D Snakehead = _engine.get_Snakehead();
    Vector2D Applepos = _engine.get_Applepos();                           //need to code clear apple and make sure apple isnt spawning every time

    if(Snakehead.x == Applepos.x && Snakehead.y == Applepos.y) {


        _score++;
        _length = _length++;
        _engine.set_Applepos(lcd);    //randomises new values for _apx,_apy and draws on lcd -- the position is not needed until we compare it to Snakehead
        pad.tone(1500.0,0.5);          //need to clear apple
        pad.leds_on();
        wait(0.5);
        pad.leds_off();

    }
}

void Snake::check_wall_collisions()     // Vector2D *&snakebody hopefully this points to values stored in snakebody then can compare to snakehead
{
    Vector2D Snakehead = _engine.get_Snakehead();


    if (Snakehead.x == 0 || Snakehead.x == 84 || Snakehead.y == 0 || Snakehead.y == 42) {   //how do i access snakehead.headx

        _gameover = true;
    } else {
        _gameover = false;

    }
}