Ben Evans / Mbed 2 deprecated Defender_Game

Ben Evans University Second Year Project. Game Called Defender.

Dependencies:   mbed

https://os.mbed.com/media/uploads/evanso/84bc1a30759fd6a1e3f1fd1fae3e97c2.png

Hello, soldier, you have been specially selected as the defender of planet earth.

Your mission, if you choose to accept it. Fly around the planet and pulverise invading alien ships for as long as you can. Stop the aliens abducting the innocent people on the ground. Be warned if an alien ship manages to abduct a person and take them to top of the screen, they will no longer move randomly and will begin to hunt you down. This sounds like a challenge you were trained for.

But don’t worry soldier you’re not going into battle empty-handed. Your ship is equipped with a state of the art laser beam that has unlimited ammo and four smart bombs that will destroy anything on the screen. The ship also has three lives so use them wisely.

As time goes on more alien ships will arrive on planet earth increasing the difficulty of your mission. And remember the landscape bellow loops around so if you continually fly in the same direction you go to your original position. Good luck soldier.

Alien/Alien.cpp

Committer:
evanso
Date:
2020-05-27
Revision:
87:832ca78426b5
Parent:
86:eecd168c3a23

File content as of revision 87:832ca78426b5:

#include "Alien.h"

// Constant Definitions
#define SPRITE_X_LENGTH 7
#define SPRITE_Y_LENGTH 6

const int k_alien_sprite[6][7] = {
    { 0,0,1,1,1,1,0,},
    { 0,1,0,1,1,0,1,},
    { 0,1,0,1,1,0,1,},
    { 0,0,1,1,1,1,0,},
    { 0,1,0,1,0,1,0,},
    { 1,0,0,1,0,0,1,},
};

Alien::Alien() {

}
 
Alien::~Alien() {
    
}

void Alien::init(Gamepad &pad, int position_x_start, int position_y_start) {
    // Assign values to variables
    sprite_x_length = SPRITE_X_LENGTH;
    sprite_y_length = SPRITE_Y_LENGTH;
    position_x_ = position_x_start;
    position_y_ = position_y_start;
    alien_move_counter_ = 0;
    srand(pad.read_adc()*64000);
    random_move_counter_ = 0;
    random_direction_ = 0;
    direction_ = rand()%2;
    collision_people_element_ = -1; 
    track_flag_ = false;
}
 
void Alien::draw_alien(N5110 &lcd,Vector2D spaceship_pos,Direction d_, 
int map_length_, int position_x_map_, bool alien_collision) {
    // Moves alien with map movement 
    position_x_ += calc_sprite_movement(d_);
    
    // Moves alien at half speed of spaceship 
    if (alien_move_counter_%2 == 0) {
        
        // Alien tracks spaceship if abducted people
        if (track_flag_) {
            move_hunt_mode(spaceship_pos);
            
            // printf("tack_flag =  %d\n", track_flag_);
            // printf("pos_x = %d : pos y = %d\n",position_x_, position_y_);
            
        // If no abduction alien moves randomly 
        }else if (random_move_counter_ == 0 || alien_collision) {
            
            // Move alien to top of screen if a collision with person
            if (alien_collision) {
                random_direction_ = 6;
                  
                random_move_counter_ = 42;
                alien_collision = false;
            }else{
                set_random_move();
            }
            
        }
        // Stop alien going of map
        off_screen_x_y_checker(map_length_, position_x_map_); 
        
        // Move alien not tracking spaceship move randomly 
        if (!track_flag_) {
            move_direction();  
        }
        
        
        
        random_move_counter_ --; 
        alien_fire_counter_++;  
    }
    alien_move_counter_++;
    lcd.drawSprite(position_x_, position_y_, SPRITE_Y_LENGTH, SPRITE_X_LENGTH, 
    (int*)k_alien_sprite);
}

void Alien::off_screen_x_y_checker(int map_length_, int position_x_map_) {
    // Checks y position of alien and then alters alien movement direction if at 
    // edge  of map
    if (position_y_ < 9) {
        // Sets alien direction to one that increases y value 
        if (direction_) {
            random_direction_ = 1;
        }else{
            random_direction_ = 4;
        }
        
    }else if (position_y_ > 42) {
        // Sets alien direction to one that decrees y value 
        if (direction_) {
            random_direction_ = 2;
        }else{
            random_direction_ = 5;
        }
    } 
    
    // Loops the alien round if it reaches the end of the map 
    if (position_x_ <= (84 - map_length_)) {
       position_x_ += map_length_; 
    }else if (position_x_ >= map_length_) {
        position_x_ -= map_length_ + 10;
    }   
    
    // Debug and check variables when defined  
    #ifdef CALCULATE_ALIEN_MOVEMENT_DEBUG   
        printf("\nposition_x_map_ =  %d\n", position_x_map_);
        printf("map_length_  =  %d\n", map_length_ );
        printf("map_length_ + position_x_map_ =  %d\n", map_length_ + 
        position_x_map_);
    #endif
}   

void Alien::move_hunt_mode(Vector2D spaceship_pos) {
    if (spaceship_pos.x < position_x_) {
        position_x_ --;
    }else if (spaceship_pos.x > position_x_) {
        position_x_ ++;
    }
    
    if (spaceship_pos.y > position_y_) {
        position_y_ ++;
    }else if (spaceship_pos.y < position_y_) {
        position_y_ --;
    }
}

int Alien::get_alien_fire_counter() {
    return alien_move_counter_;
} 

void Alien::set_alien_x_pos(int position_x) {
    position_x_ = position_x;
}

void Alien::set_collision_people_element(int people_element) {
    collision_people_element_ = people_element;
}

int Alien::get_collision_people_element() {
    return collision_people_element_;
} 

void Alien::set_track_flag(bool track_flag) {
    track_flag_ = track_flag;
}

bool Alien::get_track_flag() {
    return track_flag_;
}