File content as of revision 31:eefa1d23a843:

#include "Ball.h"

#define ORIGIN_BALL_X 42
#define ORIGIN_BALL_Y 15

#define ORIGIN_BOWLER_X 42
#define ORIGIN_BOWLER_Y 3

#define TARGET_BOWLER_Y 15
#define TARGET_BALL_Y 36



//Constructor for the Ball Object
Ball::Ball()
{

}

//Deconstructor for the Ball Object
Ball::~Ball()
{

}
//Initialises the Ball Object
void Ball::init(int size)
{
    /*Sets the ball size and ball's starting x & y co-ordinate*/
    _size = size;
    _ball_x = ORIGIN_BALL_X;
    _ball_y = ORIGIN_BALL_Y;
    
     /*_bowler_ball_x and _bowler_ball_y are the bowler's starting co-ordinate*/
    _bowler_x=ORIGIN_BOWLER_X;
    _bowler_y=ORIGIN_BOWLER_Y;
    
    /*Initially sets the Ball class variables to 0 */
    _ball_count=0;
    _set_tone=0;
    _ball_count=0;

}

/*Increments the ball count for each round*/
void Ball::increment_ball_count(){
    _ball_count++;
}

/*getter method: Returns the integer ball Coumt*/
int Ball::get_ball_count(){
    return _ball_count;
}

/* The bowler is marked with a white circle on top of the pitch and runs in
   to bowl at the start of every round, the y cordinate is incremented for every call
   to the function till the target co-ordinate of 15 is reached, when the target
   co-ordinate is reached, the method returns 1
   
   The method is called in ball_start()
*/
int Ball::bowler_start(Gamepad &pad){
    // wait function implemented to provide time in between each round 
    if (_bowler_y==3){ //the starting co-ordinate for the bowler is 3 
             wait(0.5);
        }
    //y-ordinate is incremented if the target co-ordinate is no reached
    if(_bowler_y!=TARGET_BOWLER_Y){
        _bowler_y+=1;
        return 0;
    }
    else {
        /*
        set_tone used as a flag to indicate whether to play tone or not
        The tone of frequency 750Hz every time the bowler reaches the target co-ordinate to
        inform the player that the ball will now be delivered */
        if (_set_tone==0){
            pad.tone(750.0,0.3);
            _set_tone=1;
        }  
        return 1;
    }
}
/* ball_start follows a similar logic to bowler_start wherein there is a target y co-ordinate for the ball
    the y co-ordinate is incremented untill the target co-ordinate is reached returning 1 */
int Ball::ball_start(Gamepad &pad){ 
    //Method only starts running after bowler_start() returns 1
   int bowler_start_check=bowler_start(pad);
   
   if (bowler_start_check==1){
      if (_ball_y!=TARGET_BALL_Y){  //target_cordinate is 36
            _ball_y+=1;
            return 0;        
        }
        else{
            //sets _bowled flag to 1
            return 1;
        } 
    }
    //returns 0 if the bowler_start hasn't returned 1
    return 0;  
}
// Method to draw the ball and ball count on to the LCD
void Ball::draw(N5110 &lcd)
{
    //draws the ball cont to the top left of the LCD
    char buffer[5];
    int c=get_ball_count();
    int length=sprintf(buffer,"B%i",c);
    lcd.printString(buffer,70,0);
    //draws the ball and the bowler to the LCD
    lcd.drawCircle(_bowler_x,_bowler_y,2,FILL_TRANSPARENT);
    lcd.drawCircle(_bowler_x,_bowler_y,1,FILL_BLACK);
    lcd.drawCircle(_ball_x,_ball_y,2,FILL_BLACK);
    //lcd.drawRect(_ball_x,_ball_y,_size,_size,FILL_BLACK);
}
/*The method takes as paramets the expected x and y co-ordinates for the ball to 
  travel towards. Accorodingly the x & y co-orinate are incremente untill the exepcted
  co-ordinates are reached and then returns 1 
*/
int Ball::update_ball(int expected_ball_x,int expected_ball_y){
    /*Checking if the y co-ordinate of the ball is equal to the expected y_co-ordinate
     if true, a simple if condition is conduced to check if the expected cordinate
     is greater than or less than the current ball co-ridnate the current y_ordinate of 
     the ball is incremented decremented accordingly.
     */
    if (_ball_y!=expected_ball_y){
     if (_ball_y>=expected_ball_y){
         _ball_y--;
     }
     else{
         _ball_y++;
     }
     /*Checking if the x co-ordinate of the ball is equal to the expected x_co-ordinate
     if true, a simple if condition is conduced to check if the expected cordinate
     is greater than or less than the current ball co-ridnate the current x_ordinate of 
     the ball is incremented or decremented accordingly
     */
    }
    if (_ball_x!=expected_ball_x){
     if (_ball_x>expected_ball_x)
         _ball_x--;
     else{
         _ball_x++;
    }
   }
printf(" %i %i %i %i \n",_ball_x,expected_ball_x,_ball_y,expected_ball_y);//used for debugging

// if x& y cordinates are equal to the target co-ordinate, method returns 1
if (_ball_x==expected_ball_x && _ball_y==expected_ball_y){
    return 1;
}
else{
    return 0; 
}
}
//resets the ball count
void Ball::reset_ball_count(){
    _ball_count=0;
}
//resets the ball variables and the ball and bolwer cordinates to the origin
void Ball::reset(){
    _ball_x = ORIGIN_BALL_X;
    _ball_y = ORIGIN_BALL_Y;
    
     
    _bowler_x=ORIGIN_BOWLER_X;
    _bowler_y=ORIGIN_BOWLER_Y;
    _set_tone=0;
}