File content as of revision 72:938d2d65199d:

#include "SpaceInvadersEngine.h"

SpaceInvadersEngine::SpaceInvadersEngine()
{

}

SpaceInvadersEngine::~SpaceInvadersEngine()
{


}




void SpaceInvadersEngine::init(int space_ship_width,int space_ship_height,int bullet_size, int Alien_size, int speed)
{
    // initialise the game parameters

    _space_ship_width= space_ship_width;
    _space_ship_height= space_ship_height;
    _bullet_size= bullet_size;
    _Alien_size= Alien_size;
    _speed= speed;


}

void  SpaceInvadersEngine::read_input(Gamepad &pad)
{
    _d = pad.get_direction();
    _mag = pad.get_mag();
}

void  SpaceInvadersEngine::draw(N5110 &lcd)
{
    // draw the elements in the LCD buffer
    // pitch

    //score
    print_scores(lcd);
    _Alien.draw(lcd);
    _space_ship.draw(lcd);
    _bullet.draw(lcd);
}

void  SpaceInvadersEngine::update(Gamepad &pad)
{
    check_goal(pad);
    _bullet.update();
    _space_ship.update(_d,_mag);

    _A1ien.update(_d,_mag);

    check_Alien_collision(pad);
    check_space_ship_collisions(pad);


}
void SpaceInvadersEngine::check_Alien_collision(Gamepad &pad)
{

    // read current bullet attributes
    Vector2D bullet_pos = _bullet.get_pos();
    Vector2D bullet_velocity = _bullet.get_velocity();
    //check if the bullet hit the top of the alien

    // check if the bullet hits top of the Alien
    if (bullet_pos.y <= 1) {  //  1 due to 1 pixel boundary
        bullet_pos.y = 1;  // bounce off ceiling without going off screen
        bullet_velocity.y = -bullet_velocity.y;
        // audio feedback
        pad.tone(750.0,0.1);
    }

    // check if the bullet hits bottom of the Alien
    else if (bullet_pos.y + _bullet_size >= (HEIGHT-1) ) { // bottom pixel is 47
        // hit bottom
        bullet_pos.y = (HEIGHT-1) - _bullet_size;  // stops bullet going off screen
        bullet_velocity.y = -bullet_velocity.y;
        // audio feedback
        pad.tone(750.0,0.1);
    }

    // update bullet parameters
    _bullet.set_velocity(bullet_velocity);
    _bullet.set_pos(bullet_pos);
}

void SpaceInvadersEngine::check_space_ship_collisions(Gamepad &pad){
     // read current bullet attributes
    Vector2D bullet_pos = _bullet.get_pos();
    Vector2D bullet_velocity = _bullet.get_velocity();
    
    
    / check p1 first
    Vector2D p1_pos = _space_ship.get_pos();

    // see if bullet has hit the paddle by checking for overlaps
    if (
        (bullet_pos.y >= space_ship.y) && //top
        (bullet_pos.y <= space_ship_pos.y + _paddle_height) && //bottom
        (bullet_pos.x >= _space_shipx) && //left
        (bullet_pos.x <= _space_shipx + _space_ship_width)  //right
    ) {
        // if it has, fix position and reflect x velocity
        bullet_pos.x = _p1x + _space_ship_width;
        bullet_velocity.x = -bullet_velocity.x;
        // audio feedback
        pad.tone(1000.0,0.1);
    }

}

void SpaceInvadersEngin::check_goal(Gamepad &pad)
{
    Vector2D bullet_pos = _bullet.get_pos();
    // spaceship has scored
    if (bullet_pos.x + _bullet_size < 0) {
        _sace_ship.add_score();
        _bullet.init(_bullet_size,_speed);
        pad.tone(1500.0,0.5);
        pad.leds_on();
        wait(0.5);
        pad.leds_off();
    }

    void SpaceInvadersEngin::print_scores(N5110 &lcd) {
        // get scores from the spaceship
        int space_ship_score = _space_ship.get_score();


        // print to LCD i
        char buffer1[14];
        sprintf(buffer1,"%2d",space_ship_score);
        lcd.printString(buffer1,WIDTH/2 - 20,1);  // font is 8 wide, so leave 4 pixel gape from middle assuming two digits

    }