File content as of revision 3:a8960004d261:

#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;
    _y_vel = 0;

}

void Ball::draw_ball(N5110 &lcd)
{
    lcd.drawRect(_x_pos,_y_pos,3,3,FILL_BLACK); //draws ball 
}

void Ball::draw_aim(N5110 &lcd)
{
    lcd.drawLine((_x_pos+1.0f),(_y_pos+1.0f),(_x_pos+1.0f)-(_joy.x*16.0f),(_y_pos+1.0f)-(-_joy.y*16.0f),2); //draws ball 
}

void Ball::draw_screen(N5110 &lcd) 
{
    lcd.drawRect(16,8,51,31,FILL_TRANSPARENT);    
}

void Ball::move_ball()
{
    _x_pos = _x_pos + _x_vel;     
    _y_pos = _y_pos + _y_vel;   
    _x_vel = _x_vel*0.9f; //ball slows down 10% each loop 
    _y_vel = _y_vel*0.9f; 
    check_hit_wall();
  
}

void Ball::shoot_ball(Gamepad &pad)
{
    if(pad.check_event(Gamepad::A_PRESSED) == true && _x_vel < 0.1f && _y_vel < 0.1f){ //if ball stationary and a pressed then shoot
    
    _x_vel = 8.0f * _joy.x; //scale x velocity by joystick direction and magnitude
    _y_vel = 8.0f * -_joy.y; //scale y velocity by joystick direction and magnitude
    }

}

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

void Ball::check_hit_wall() 
{
    
    if(_x_pos <= 16) { 
        _x_pos = 17;
        _x_vel = -_x_vel;
    } 
    
    else if(_x_pos >= (WIDTH - 18)) {
        _x_pos = (WIDTH - 20);
        _x_vel = -_x_vel;
    }
    else if(_y_pos <= 8) { 
        _y_pos = 9;
        _y_vel = -_y_vel;
    } 
    
    else if(_y_pos >= (HEIGHT - 11)) {
        _y_pos = (HEIGHT - 13);
        _y_vel = -_y_vel;
    }
}

void Ball::read_joy(Gamepad &pad)
{
                                    
    _coords = pad.get_mapped_coord();
    _joy.mag = pad.get_mag();
    _joy.x = _coords.x;
    _joy.y = _coords.y;
    
}
//private methods