File content as of revision 25:e827f1a8fadc:

#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 = 1;// change this according to the options selected
    
}


int Snake::draw(Gamepad &pad, N5110 &lcd, int length, int level)
{   
    if(m == 0){
        _x[0] = WIDTH/2;  //Spawns player sprite near the middle of the screen.
        _y[0] = HEIGHT - 3; 
        
        for(int i=0; i<=13; i++)  {
            _x[i+1] = _x[i];
            _y[i+1] = _y[i] - 3;
            b[i] = 1;
        }
        b[14] = 1; 
        m = m+1;  
    }
    //printf("SPRITE %d %d \n", _x[0], _y[0]); 
    if(length == 0)  {
        while ((pad.check_event(Gamepad::BACK_PRESSED) == false)) {
            lcd.clear();
            lcd.printString("Game",33,1);
            lcd.printString("Over",33,3);
            lcd.printString("Press Back",14,5); //Function used to promt the user to Restart.
            lcd.refresh();
            wait(0.1);
       }
        NVIC_SystemReset(); //Software Reset. //change this condition to loosing screen.
    }
    
    for(int a=1; a<=15; a++)  {
        if(length == a)  {
            for(int i=0; i<=a-1; i++)  {
                lcd.drawSprite(_x[i],_y[i],3,3,(int *)snake_sprite); //Function used to draw the sprite.
            }
        }
    }
    
    if(length > 15)  {
        lcd.clear();
        lcd.printString("Level Complete",0,1);
        lcd.printString("Press Start",10,3);
        lcd.printString("to Proceed",12,4);
        lcd.refresh();
        while ( pad.check_event(Gamepad::START_PRESSED) == false) {
            pad.leds_on();
            pad.tone(rand()%1001,0.1); //helps to set max freq for random sound
            wait(0.1);
            pad.leds_off();
            wait(0.1);
        }
        lcd.clear();
        sprintf(bufferlevel,"%d",level);
        lcd.printString("Level:",25,1);
        lcd.printString(bufferlevel,40,3);
        lcd.refresh();
        wait(2);
        length = 3;
    }
    return length;
}


Vector2D Snake::get_pos(int length)
{
    for(int i=1; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos = {_x[i-1],_y[i-1]}; //Obtains the snake position.
            return snakepos;
        }
    }
    Vector2D snakepos = {-20,-20}; //Obtains the snake position.
    return snakepos;
    //printf("snakepos from player = %f %f \n", snakepos.x, snakepos.y);
}

Vector2D Snake::get_pos_before1(int length)  //this sends data of following sprites.
{
    for(int i=2; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b1 = {_x[i-2],_y[i-2]}; //Obtains the snake position.
            return snakepos_b1;
        }
    }
    Vector2D snakepos_b1 = {-20,-20}; //Obtains the snake position.
    return snakepos_b1;
    //printf("snakepos_b1 from player = %f %f \n", snakepos_b1.x, snakepos_b1.y);
}

Vector2D Snake::get_pos_before2(int length)  //this sends data of following sprites.
{
    for(int i=3; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b2 = {_x[i-3],_y[i-3]}; //Obtains the snake position.
            return snakepos_b2;
        }
    }
    Vector2D snakepos_b2 = {-20,-20}; //Obtains the snake position.
    return snakepos_b2;
    //printf("snakepos_b2 from player = %f %f \n", snakepos_b2.x, snakepos_b2.y);
}

Vector2D Snake::get_pos_before3(int length)  //this sends data of following sprites.
{
    for(int i=4; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b3 = {_x[i-4],_y[i-4]}; //Obtains the snake position.
            return snakepos_b3;
        }
    }
    Vector2D snakepos_b3 = {-20,-20}; //Obtains the snake position.
    return snakepos_b3;
    //printf("snakepos_b3 from player = %f %f \n", snakepos_b3.x, snakepos_b3.y);
}

Vector2D Snake::get_pos_before4(int length)  //this sends data of following sprites.
{
    for(int i=5; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b4 = {_x[i-5],_y[i-5]}; //Obtains the snake position.
            return snakepos_b4;
        }
    }
    Vector2D snakepos_b4 = {-20,-20}; //Obtains the snake position.
    return snakepos_b4;
    //printf("snakepos_b4 from player = %f %f \n", snakepos_b4.x, snakepos_b4.y);
}

Vector2D Snake::get_pos_before5(int length)  //this sends data of following sprites.
{
    for(int i=6; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b5 = {_x[i-6],_y[i-6]}; //Obtains the snake position.
            return snakepos_b5;
        }
    }
    Vector2D snakepos_b5 = {-20,-20}; //Obtains the snake position.
    return snakepos_b5;
    //printf("snakepos_b5 from player = %f %f \n", snakepos_b5.x, snakepos_b5.y);
}

Vector2D Snake::get_pos_before6(int length)  //this sends data of following sprites.
{
    for(int i=7; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b6 = {_x[i-7],_y[i-7]}; //Obtains the snake position.
            return snakepos_b6;
        }
    }
    Vector2D snakepos_b6 = {-20,-20}; //Obtains the snake position.
    return snakepos_b6;
    //printf("snakepos_b6 from player = %f %f \n", snakepos_b6.x, snakepos_b6.y);
}

Vector2D Snake::get_pos_before7(int length)  //this sends data of following sprites.
{
    for(int i=8; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b7 = {_x[i-8],_y[i-8]}; //Obtains the snake position.
            return snakepos_b7;
        }
    }
    Vector2D snakepos_b7 = {-20,-20}; //Obtains the snake position.
    return snakepos_b7;
    //printf("snakepos_b7 from player = %f %f \n", snakepos_b7.x, snakepos_b7.y);
}

Vector2D Snake::get_pos_before8(int length)  //this sends data of following sprites.
{
    for(int i=9; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b8 = {_x[i-9],_y[i-9]}; //Obtains the snake position.
            return snakepos_b8;
        }
    }
    Vector2D snakepos_b8 = {-20,-20}; //Obtains the snake position.
    return snakepos_b8;
    //printf("snakepos_b8 from player = %f %f \n", snakepos_b8.x, snakepos_b8.y);
}

Vector2D Snake::get_pos_before9(int length)  //this sends data of following sprites.
{
    for(int i=10; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b9 = {_x[i-10],_y[i-10]}; //Obtains the snake position.
            return snakepos_b9;
        }
    }
    Vector2D snakepos_b9 = {-20,-20}; //Obtains the snake position.
    return snakepos_b9;
    //printf("snakepos_b9 from player = %f %f \n", snakepos_b9.x, snakepos_b9.y);
}

Vector2D Snake::get_pos_before10(int length)  //this sends data of following sprites.
{
    for(int i=11; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b10 = {_x[i-11],_y[i-11]}; //Obtains the snake position.
            return snakepos_b10;
        }
    }
    Vector2D snakepos_b10 = {-20,-20}; //Obtains the snake position.
    return snakepos_b10;
    //printf("snakepos_b10 from player = %f %f \n", snakepos_b10.x, snakepos_b10.y);
}

Vector2D Snake::get_pos_before11(int length)  //this sends data of following sprites.
{
    for(int i=12; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b11 = {_x[i-12],_y[i-12]}; //Obtains the snake position.
            return snakepos_b11;
        }
    }
    Vector2D snakepos_b11 = {-20,-20}; //Obtains the snake position.
    return snakepos_b11;
    //printf("snakepos_b11 from player = %f %f \n", snakepos_b11.x, snakepos_b11.y);
}

Vector2D Snake::get_pos_before12(int length)  //this sends data of following sprites.
{
    for(int i=13; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b12 = {_x[i-13],_y[i-13]}; //Obtains the snake position.
            return snakepos_b12;
        }
    }
    Vector2D snakepos_b12 = {-20,-20}; //Obtains the snake position.
    return snakepos_b12;
    //printf("snakepos_b12 from player = %f %f \n", snakepos_b12.x, snakepos_b12.y);
}

Vector2D Snake::get_pos_before13(int length)  //this sends data of following sprites.
{
    for(int i=14; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b13 = {_x[i-14],_y[i-14]}; //Obtains the snake position.
            return snakepos_b13;
        }
    }
    Vector2D snakepos_b13 = {-20,-20}; //Obtains the snake position.
    return snakepos_b13;
    //printf("snakepos_b13 from player = %f %f \n", snakepos_b13.x, snakepos_b13.y);
}

Vector2D Snake::get_pos_before14(int length)  //this sends data of following sprites.
{
    for(int i=15; i<=15; i++)  {
        if(length == i)  {
            Vector2D snakepos_b14 = {_x[i-15],_y[i-15]}; //Obtains the snake position.
            return snakepos_b14;
        }
    }
    Vector2D snakepos_b14 = {-20,-20}; //Obtains the snake position.
    return snakepos_b14;
    //printf("snakepos_b14 from player = %f %f \n", snakepos_b14.x, snakepos_b14.y);
}



void Snake::update(Direction d,float mag,int length, int speed, int* b)
{
    _speed = speed;  //Speed changes depending on how much you push the joystick.(As Of Now)
    
    //this makes all of the snake beeds chained together by making the lower ones drag towards where the top one was in the previous loop
    for(int i=0; i<=13; i++)  {
        if(length > i+1)  {
            if ((_x[i] > _x[i+1])&&(b[i+1] == 1)&&(b[i] == 1))  {
                _x[i]-=_speed;    
            }
            if ((_x[i] < _x[i+1])&&(b[i+1] == 1)&&(b[i] == 1))  {
                _x[i]+=_speed;    
            }
        }
    }
   //this makes the controls of W/E directions only exclusive to the top beed in the snake
    for(int i=14; i>=0; i--)  {
            if((length == i+1)&&(b[i] == 1))  {
                if (d == E) {
                    _x[i]+= _speed;
                }
                if (d == W) {
                    _x[i]-= _speed;
                }
            }
    }

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

    for(int i=3; i<=15; i++)  {
            if(length < 2)  {
                _x[1] = _x[0];
            }
            else if(length < i)  {
                _x[i-1] = _x[i-2];
            }
    }
    
    //Limits set so that the snake does not travel off the screen.
    for(int i=0; i<=14; i++)  {
            if (_x[i] <= 0) {
                _x[i] = 0;
            }
            if (_x[i] > 81) {
                _x[i] = 81;
            }
    }
}