Ben Evans
Ben Evans University Second Year Project. Game Called Defender.
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.
Diff: Alien/Alien.cpp
- Revision:
- 36:27aa597db3d2
- Parent:
- 35:577c65bf914e
- Child:
- 39:fc5586b930e3
--- a/Alien/Alien.cpp Fri May 15 14:19:54 2020 +0000
+++ b/Alien/Alien.cpp Fri May 15 16:31:25 2020 +0000
@@ -18,6 +18,7 @@
}
void Alien::init(Gamepad &pad, int position_x_start, int position_y_start) {
+ // Assign values to variables
sprite_x_length = 7;
sprite_y_length = 6;
position_x_ = position_x_start;
@@ -33,18 +34,23 @@
void Alien::draw_alien(N5110 &lcd,Vector2D spaceship_pos,Direction d_,
int map_length_, int position_x_map_, bool alien_collision) {
- //moves alien spaceship movemen
+ //moves alien with map movement
position_x_ += calc_sprite_movement(d_);
- //Alien moves on its own but at half speed of spaceship
+ // Moves alien at half speed of spaceship
if (alien_move_counter_%2 == 0) {
+
+ // Alien tracks spaceship if abducted poeple
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){
- //move alien to top of screen
random_direction_ = 6;
random_move_counter_ = 42;
alien_collision = false;
@@ -53,17 +59,20 @@
}
}
+
+ //Move alien not tracking spackship move randomley
if(!track_flag_){
move_direction();
}
+
+ //stop alien going of map
off_screen_x_y_checker(map_length_, position_x_map_);
+
random_move_counter_ --;
- alien_fire_counter_++;
-
-
+ alien_fire_counter_++;
}
+
alien_move_counter_++;
-
lcd.drawSprite(position_x_, position_y_, 6, 7, (int*)k_alien_sprite);
}
@@ -77,6 +86,7 @@
}else{
random_direction_ = 4;
}
+
}else if (position_y_ > 40) {
// sets alien direction to one that decreces y value
if(direction_){
@@ -116,9 +126,6 @@
}
}
-
-
-
int Alien::get_alien_fire_counter(){
return alien_move_counter_;
}