File content as of revision 12:1e601b176437:

#include "Snake.h"

Snake::Snake()
{

}

Snake::~Snake()
{

}

//The Snake Sprite.
int snake_sprite[3][3] = {
    {0,1,0},
    {1,0,1},
    {0,1,0},
};
    
int m = 0; //Variable used to allow a starting location for the player.
    

void Snake::init()
{

    _speed = 0.15;// change this according to the options selected
    
}


void Snake::draw(N5110 &lcd, int length)
{   
    if(m == 0){
        _x = WIDTH/2;  //Spawns player sprite near the middle of the screen.
        _xa = _x;
        _xb = _xa;
        _xc = _xb;
        _xd = _xc;
        _xe = _xd;
        _xf = _xe;
        _xg = _xf;
        _xh = _xg;
        _xi = _xh;
        _xj = _xi;
        _xk = _xj;
        _xl = _xk;
        _xm = _xl;
        _xn = _xm;
        _y = HEIGHT - 3; 
        m = m+1;  
        }
    //printf("SPRITE %d %d \n", _x, _y); 
    if(length == 0)  {
    NVIC_SystemReset(); //Software Reset. //change this condition to loosing screen.
    }
    if(length == 1)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    }
    if(length == 2)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    }
    if(length == 3)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    }
    if(length == 4)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    }
    if(length == 5)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    }
    if(length == 6)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    }
    if(length == 7)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xf,_y-18,3,3,(int *)snake_sprite);
    }
    if(length == 8)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xf,_y-18,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xg,_y-21,3,3,(int *)snake_sprite);
    }
    if(length == 9)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xf,_y-18,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xg,_y-21,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xh,_y-24,3,3,(int *)snake_sprite);
    }
    if(length == 10)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xf,_y-18,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xg,_y-21,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xh,_y-24,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xi,_y-27,3,3,(int *)snake_sprite);
    }
    if(length == 11)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xf,_y-18,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xg,_y-21,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xh,_y-24,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xi,_y-27,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xj,_y-30,3,3,(int *)snake_sprite);
    }
    if(length == 12)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xf,_y-18,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xg,_y-21,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xh,_y-24,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xi,_y-27,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xj,_y-30,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xk,_y-33,3,3,(int *)snake_sprite);
    }
    if(length == 13)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xf,_y-18,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xg,_y-21,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xh,_y-24,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xi,_y-27,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xj,_y-30,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xk,_y-33,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xl,_y-36,3,3,(int *)snake_sprite);
    }
    if(length == 14)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xf,_y-18,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xg,_y-21,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xh,_y-24,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xi,_y-27,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xj,_y-30,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xk,_y-33,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xl,_y-36,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xm,_y-39,3,3,(int *)snake_sprite);
    }
    if(length == 15)  {
    lcd.drawSprite(_x,_y,3,3,(int *)snake_sprite); //Function used to draw the sprite.
    lcd.drawSprite(_xa,_y-3,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xb,_y-6,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xc,_y-9,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xd,_y-12,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xe,_y-15,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xf,_y-18,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xg,_y-21,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xh,_y-24,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xi,_y-27,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xj,_y-30,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xk,_y-33,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xl,_y-36,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xm,_y-39,3,3,(int *)snake_sprite);
    lcd.drawSprite(_xn,_y-42,3,3,(int *)snake_sprite);
    }
}



Vector2D Snake::get_pos(int length)
{
    if(length == 1)  {
        Vector2D snakepos = {_x,_y}; //Obtains the snake position.
        return snakepos;
    }

    else if(length == 2)  {
        Vector2D snakepos = {_xa,(_y-3)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==3)  {
        Vector2D snakepos = {_xb,(_y-6)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==4)  {
        Vector2D snakepos = {_xc,(_y-9)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==5)  {
        Vector2D snakepos = {_xd,(_y-12)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==6)  {
        Vector2D snakepos = {_xe,(_y-15)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==7)  {
        Vector2D snakepos = {_xf,(_y-18)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==8)  {
        Vector2D snakepos = {_xg,(_y-21)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==9)  {
        Vector2D snakepos = {_xh,(_y-24)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==10)  {
        Vector2D snakepos = {_xi,(_y-27)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==11)  {
        Vector2D snakepos = {_xj,(_y-30)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==12)  {
        Vector2D snakepos = {_xk,(_y-33)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==13)  {
        Vector2D snakepos = {_xl,(_y-36)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length == 14)  {
        Vector2D snakepos = {_xm,(_y-39)}; //Obtains the snake position.
        return snakepos;
    }
    else if(length==15)  {
        Vector2D snakepos = {_xn,(_y-42)}; //Obtains the snake position.
        return snakepos;
    }
    //printf("snakepos from player = %f %f \n", snakepos.x, snakepos.y);
    return {0,0};
}


void Snake::update(Direction d,float mag,int length)
{
    _speed = 1;  //Speed changes depending on how much you push the joystick.(As Of Now)
    
    if(length > 1)  {
        if (_x > _xa)  {
            _x-=_speed;    
        }
        if (_x < _xa)  {
            _x+=_speed;    
        }
        if(length > 2)  {
            if (_xa > _xb)  {
                _xa-=_speed;    
            }
            if (_xa < _xb)  {
                _xa+=_speed;    
            }
            if(length > 3)  {
                if (_xb > _xc)  {
                    _xb-=_speed;    
                }
                if (_xb < _xc)  {
                    _xb+=_speed;    
                }
                if(length > 4)  {
                    if (_xc > _xd)  {
                        _xc-=_speed;    
                    }
                    if (_xc < _xd)  {
                        _xc+=_speed;    
                    }
                    if(length > 5)  {
                        if (_xd > _xe)  {
                            _xd-=_speed;    
                        }
                        if (_xd < _xe)  {
                            _xd+=_speed;    
                        }
                        if(length > 6)  {
                            if (_xe > _xf)  {
                                _xe-=_speed;    
                            }
                            if (_xe < _xf)  {
                                _xe+=_speed;    
                            }
                            if(length > 7)  {
                                if (_xf > _xg)  {
                                    _xf-=_speed;    
                                }
                                if (_xf < _xg)  {
                                    _xf+=_speed;    
                                }
                                if(length > 8)  {
                                    if (_xg > _xh)  {
                                        _xg-=_speed;    
                                    }
                                    if (_xg < _xh)  {
                                        _xg+=_speed;    
                                    }
                                    if(length > 9)  {
                                        if (_xh > _xi)  {
                                            _xh-=_speed;    
                                        }
                                        if (_xh < _xi)  {
                                            _xh+=_speed;    
                                        }
                                        if(length > 10)  {
                                            if (_xi > _xj)  {
                                                _xi-=_speed;    
                                            }
                                            if (_xi < _xj)  {
                                                _xi+=_speed;    
                                            }
                                            if(length > 11)  {
                                                if (_xj > _xk)  {
                                                    _xj-=_speed;    
                                                }
                                                if (_xj < _xk)  {
                                                    _xj+=_speed;    
                                                }
                                                if(length > 12)  {
                                                    if (_xk > _xl)  {
                                                        _xk-=_speed;    
                                                    }
                                                    if (_xk < _xl)  {
                                                        _xk+=_speed;    
                                                    }
                                                    if(length > 13)  {
                                                        if (_xl > _xm)  {
                                                            _xl-=_speed;    
                                                        }
                                                        if (_xl < _xm)  {
                                                            _xl+=_speed;    
                                                        }
                                                        if(length > 14)  {
                                                            if (_xm > _xn)  {
                                                                _xm-=_speed;    
                                                            }
                                                            if (_xm < _xn)  {
                                                                _xm+=_speed;    
                                                            }
                                                        }
                                                    }
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    // Diagonal speeds are /2 to prevent player from going double the speed.
    if(length == 15)  {
        if (d == E) {
            _xn+= _speed;
        }
        if (d == W) {
            _xn-= _speed;
        }
    }
    if(length == 14)  {
        if (d == E) {
            _xm+= _speed;
        }
        if (d == W) {
            _xm-= _speed;
        }
    }
    if(length == 13)  {
        if (d == E) {
            _xl+= _speed;
        }
        if (d == W) {
            _xl-= _speed;
        }
    }
    if(length == 12)  {
        if (d == E) {
            _xk+= _speed;
        }
        if (d == W) {
            _xk-= _speed;
        }
    }
    if(length == 11)  {
        if (d == E) {
            _xj+= _speed;
        }
        if (d == W) {
            _xj-= _speed;
        }
    }
    if(length == 10)  {
        if (d == E) {
            _xi+= _speed;
        }
        if (d == W) {
            _xi-= _speed;
        }
    }
    if(length == 9)  {
        if (d == E) {
            _xh+= _speed;
        }
        if (d == W) {
            _xh-= _speed;
        }
    }
    if(length == 8)  {
        if (d == E) {
            _xg+= _speed;
        }
        if (d == W) {
            _xg-= _speed;
        }
    }
    if(length == 7)  {
        if (d == E) {
            _xf+= _speed;
        }
        if (d == W) {
            _xf-= _speed;
        }
    }
    if(length == 6)  {
        if (d == E) {
            _xe+= _speed;
        }
        if (d == W) {
            _xe-= _speed;
        }
    }
    if(length == 5)  {
        if (d == E) {
            _xd+= _speed;
        }
        if (d == W) {
            _xd-= _speed;
        }
    }
    if(length == 4)  {
        if (d == E) {
            _xc+= _speed;
        }
        if (d == W) {
            _xc-= _speed;
        }
    }
    if(length == 3)  {
        if (d == E) {
            _xb+= _speed;
        }
        if (d == W) {
            _xb-= _speed;
        }
    }
    if(length == 2)  {
        if (d == E) {
            _xa+= _speed;
        }
        if (d == W) {
            _xa-= _speed;
        }
    }
    if(length == 1)  {
        if (d == E) {
            _x+= _speed;
        }
        if (d == W) {
            _x-= _speed;
        }
    }

// the following makes sure that when the length is increased, the snake stays where it was when it ate food.

    if(length < 2)  {
        _xa = _x;
    }
    else if(length < 3)  {
        _xb = _xa;
    }
    else if(length < 4)  {
        _xc = _xb;
    }
    else if(length < 5)  {
        _xd = _xc;
    }
    else if(length < 6)  {
        _xe = _xd;
    }
    else if(length < 7)  {
        _xf = _xe;
    }
    else if(length < 8)  {
        _xg = _xf;
    }
    else if(length < 9)  {
        _xh = _xg;
    }
    else if(length < 10)  {
        _xi = _xh;
    }
    else if(length < 11)  {
        _xj = _xi;
    }
    else if(length < 12)  {
        _xk = _xj;
    }
    else if(length < 13)  {
        _xl = _xk;
    }
    else if(length < 14)  {
        _xm = _xl;
    }
    else if(length < 15)  {
        _xn = _xm;
    }
    
    //Limits set so that the sprite does not travel off the screen.
    if (_y <= 0) {
        _y = 0;
    }
    if (_x <= 0) {
        _x = 0;
    }
    if (_xa <= 0) {
        _xa = 0;
    }
    if (_xb <= 0) {
        _xb = 0;
    }
    if (_xc <= 0) {
        _xc = 0;
    }
    if (_xd <= 0) {
        _xd = 0;
    }
    if (_xe <= 0) {
        _xe = 0;
    }
    if (_xf <= 0) {
        _xf = 0;
    }
    if (_xg <= 0) {
        _xg = 0;
    }
    if (_xh <= 0) {
        _xh = 0;
    }
    if (_xi <= 0) {
        _xi = 0;
    }
    if (_xj <= 0) {
        _xj = 0;
    }
    if (_xk <= 0) {
        _xk = 0;
    }
    if (_xl <= 0) {
        _xl = 0;
    }
    if (_xm <= 0) {
        _xm = 0;
    }
    if (_xn <= 0) {
        _xn = 0;
    }
    if (_x > 81) {
        _x = 81;
    }
    if (_xa > 81) {
        _xa = 81;
    }
    if (_xb > 81) {
        _xb = 81;
    }
    if (_xc > 81) {
        _xc = 81;
    }
    if (_xd > 81) {
        _xd = 81;
    }
    if (_xe > 81) {
        _xe = 81;
    }
    if (_xf > 81) {
        _xf = 81;
    }
    if (_xg > 81) {
        _xg = 81;
    }
    if (_xh > 81) {
        _xh = 81;
    }
    if (_xi > 81) {
        _xi = 81;
    }
    if (_xj > 81) {
        _xj = 81;
    }
    if (_xk > 81) {
        _xk = 81;
    }
    if (_xl > 81) {
        _xl = 81;
    }
    if (_xm > 81) {
        _xm = 81;
    }
    if (_xn > 81) {
        _xn = 81;
    }
}