File content as of revision 5:0b31909caf7f:

#include "Ball.h"

//constructor

Ball::Ball()
{

}

//deconstructor

Ball::~Ball()
{

}

//public methods

void Ball::init(float x, float y) //ball starts stationary in x and y positions given
{
    _x_pos = x;
    _y_pos = y;
    _x_vel = 0.0f;
    _y_vel = 0.0f;
    _shot_count = 0;

}

void Ball::drawBall(N5110 &lcd)
{
    lcd.drawRect(_x_pos,_y_pos,2,2,FILL_BLACK); //draws ball 
}

void Ball::printShotCount(N5110 &lcd) 
{
    char buffer[14];
    sprintf(buffer,"Shot %i",_shot_count);
    lcd.printString(buffer,40,0);      
}

void Ball::drawPower(N5110 &lcd, Gamepad &pad)
{     

    _mag = pad.get_mag();
    lcd.drawRect(0,0,36,6,FILL_TRANSPARENT);
    lcd.drawRect(0,0,36*_mag,6,FILL_BLACK);
}


void Ball::move_ball(int frame_rate)
{
    _x_pos = _x_pos + _x_vel*10.0f/frame_rate; //frame_rate used to scale ball movement so that it is the same for any fps  
    _y_pos = _y_pos + _y_vel*10.0f/frame_rate;   
    _x_vel = _x_vel*(1.0f-(0.8f/frame_rate)); //ball slows down 10% each loop (scaled by time between frames)
    _y_vel = _y_vel*(1.0f-(0.8f/frame_rate));
  
}

Vector2D Ball::get_ball_pos()
{   
    Vector2D pos = {_x_pos, _y_pos};
    return pos;
}

void Ball::shoot_ball(Gamepad &pad)
{    
    _joystick = pad.get_mapped_coord();
    
    if(pad.check_event(Gamepad::A_PRESSED) == true && abs(_x_vel) < 0.05f && abs(_y_vel) < 0.05f){ //if ball stationary and a pressed then shoot
        _x_vel = 8.0f * _joystick.x; //scale x velocity by joystick direction and magnitude
        _y_vel = 8.0f * -_joystick.y; //scale y velocity by joystick direction and magnitude
        _shot_count ++; //increment shot count
    }

}

int Ball::get_shot_count()
{
    int shot_count = _shot_count;
    return shot_count;
}

void Ball::set_vel(float x_vel, float y_vel) 
{
    _x_vel = x_vel;
    _y_vel = y_vel;
}

void Ball::read_joy(Gamepad &pad)
{
                                    
    _joystick = pad.get_mapped_coord(); //x and y coordinates from joystick assigned 

    
}

void Ball::check_wall_bounce() //check before and after move_ball called
{
    if(_x_pos - 1 < 9 && _y_pos >= 26 && _y_pos <= 40 && _x_vel < 0){ // left wall (x=9 ,26<=y<=40)
        _x_pos = 10;
        _x_vel = -0.95f*_x_vel; //5% velocity lost on impact and bounce
    }     
    if(_x_pos + 1 > 74 && _y_pos <= 40 && _y_pos >= 9 && _x_vel > 0){ //right wall x + 1
        _x_pos = 72;
        _x_vel = -0.95f*_x_vel;
    }
    if(_y_pos - 1 < 9 && _x_pos <= 74 && _x_pos >= 50 && _y_vel < 0){ //top wall y -1
        _y_pos = 10;
        _y_vel = -0.95f*_y_vel;
    }
    if(_y_pos + 1 > 40 && _x_pos >= 9 && _x_pos <= 74 && _y_vel > 0){ //bottom wall y  + 2
        _y_pos = 39;
        _y_vel = -0.95f*_y_vel;
    }
    if(_x_pos - 1 < 50 && _y_pos >= 9 && _y_pos <= 26 && _x_vel < 0){ // left wall x -1
        _x_pos = 51;
        _x_vel = -0.95f*_x_vel; //5% velocity lost on impact and bounce
    }     
    if(_y_pos - 1 < 26 && _x_pos <= 50 && _x_pos >= 9 && _y_vel < 0 ){ //top wall y -1
        _y_pos = 27;
        _y_vel = -0.95f*_y_vel;
    }
}
//private methods