ELEC2645 (2019/20) / Mbed 2 deprecated ELEC2645_Project_mc18hal_v2

Helios Lyons 201239214

Dependencies:   mbed

Brief

My aim for this project was to create a FRDM K64F adapted version of the classic Space Invaders by Tomohiro Nishikado. The game itself has a number of clear features to implement;

  • Left to right movement for the player 'canon'
  • A fixed amount of player lives
  • Firing mechanics for both canon and invaders (hence collision systems)
  • Random firing from remaining invaders
  • Wave based combat

My own addition to these established ideas was Boss waves, featuring a single, larger sprite which fires at a faster interval than previous waves. The addition of a movement system using a basic for loop, as opposed to a velocity based system, will enhance the nostalgic feel of the game.

https://os.mbed.com/media/uploads/helioslyons/screenshot_2020-05-27_at_06.12.00.png

Gameplay

Movement is controlled with the joystick, moving the canon left or right. Fire by pressing A. Invaders spawn at set positions, but randomly fire at a set interval, which is higher for boss waves. Time is taken during each wave, and displayed at wave intervals, and if the play wins.

Controls are shown on the Gamepad below: (attribution: Craig A. Evans, ELEC2645 University of Leeds)

https://os.mbed.com/media/uploads/helioslyons/screenshot_2020-05-27_at_06.20.18.png

Diff: Invaders/Invader.cpp

Revision:
11:1fd8fca23375
Parent:
10:19b250c7de5e
--- a/Invaders/Invader.cpp	Mon May 18 18:14:35 2020 +0000
+++ b/Invaders/Invader.cpp	Wed May 27 05:07:34 2020 +0000
@@ -4,80 +4,136 @@
 
 Invader::Invader()
 {
- 
 }
  
 Invader::~Invader()
 {
- 
 }
  
-void Invader::init(int sprite, int hitpoints)
-{
-    //_y = y;
-    // _x = x;
-    _height = 8;
-    _width = 11;
-    _death = false;
+void Invader::init(int sprite, int hitpoints, int boss)
+{    
+    _height = 8; // set invader accessible variables
+    _width = 8; // height is the same for normal invaders
+    _death = false; // changed in drawn statement for bosses
     _sprite = sprite;
     _hitpoints = hitpoints;
 }
  
 void Invader::draw(N5110 &lcd)
 {
-    if (_death == false) { // classic Space Invader sprites made into bitmap
-    //lcd.drawRect(_x,_y,_width,_height,FILL_BLACK);
-    static int invader1_data[] = {
-    0,0,1,0,0,0,0,0,1,0,0, // ..#.....#..
-    0,0,0,1,0,0,0,1,0,0,0, // ...#...#...
-    0,0,1,1,1,1,1,1,1,0,0, // ..#######..
-    0,1,1,0,1,1,1,0,1,1,0, // .##.###.##.
-    1,1,1,1,1,1,1,1,1,1,1, // ###########
-    1,0,1,1,1,1,1,1,1,0,1, // #.#######.#
-    1,0,1,0,0,0,0,0,1,0,1, // #.#.....#.#
-    0,0,0,1,1,0,1,1,0,0,0  // ...##.##...
+    // classic Space Invader sprites made into a bitmap    
+    static int inv1_resize_data[] = {
+    0,1,0,0,0,0,1,0, // shrunk from original design (used on start screen)
+    0,0,1,0,0,1,0,0, // to fit better on LCD
+    0,0,1,1,1,1,0,0,
+    0,1,0,1,1,0,1,0,
+    1,1,1,1,1,1,1,1,
+    1,0,1,1,1,1,0,1,
+    1,0,1,0,0,1,0,1,
+    0,0,0,1,1,0,0,0
+    };
+    
+    static int inv2_resize_data[] = {
+    0,1,0,0,0,0,1,0, 
+    0,0,1,0,0,1,0,0, 
+    1,0,1,1,1,1,0,1,
+    1,1,0,1,1,0,1,1,
+    0,1,1,1,1,1,1,0,
+    0,0,1,0,0,1,0,0,
+    0,1,0,0,0,0,1,0,
+    1,0,0,0,0,0,0,1
+    };
+    
+    static int inv3_resize_data[] = {
+    0,0,0,1,1,0,0,0, 
+    0,0,1,1,1,1,0,0, 
+    0,1,0,1,1,0,1,0,
+    1,1,0,1,1,0,1,1,
+    0,1,1,1,1,1,1,0,
+    0,0,1,0,0,1,0,0,
+    0,1,0,1,1,0,1,0,
+    1,0,1,0,0,1,0,1
     };
     
-    static int invader2_data[] = {
-    0,0,1,0,0,0,0,0,1,0,0, // ..#.....#..
-    1,0,0,1,0,0,0,1,0,0,1, // #..#...#..#
-    1,0,1,1,1,1,1,1,1,0,1, // #.#######.#
-    1,1,1,0,1,1,1,0,1,1,1, // ###.###.###
-    1,1,1,1,1,1,1,1,1,1,1, // ###########
-    0,1,1,1,1,1,1,1,1,1,0, // .#########.
-    0,0,1,0,0,0,0,0,1,0,0, // ..#.....#..
-    0,1,0,0,0,0,0,0,0,1,0  // .#.......#.
+    static int boss1_data[] = {
+    0,0,0,1,0,0,0,0,0,0,0, // Boss 1: Astro
+    0,0,0,0,1,0,0,0,0,0,0,
+    0,0,0,0,1,1,0,0,0,0,0,
+    0,0,0,0,1,1,1,0,0,0,0,
+    0,0,1,1,1,1,1,1,1,0,0,
+    0,1,1,1,1,1,1,1,1,1,0,
+    0,1,0,0,1,1,1,0,0,1,0,
+    0,1,0,0,1,1,1,0,0,1,0,
+    1,1,1,1,1,1,1,1,1,1,1,
+    1,1,1,1,1,1,1,1,1,1,1,
+    0,1,1,0,0,0,0,0,1,1,0,
+    0,0,1,0,0,0,0,0,1,0,0,
+    0,0,0,1,0,0,0,1,0,0,0,
+    0,0,0,0,1,0,1,0,0,0,0
     };
     
-    static int invader3_data[] = {
-    0,0,0,0,1,1,1,0,0,0,0, // ....###....
-    0,0,0,1,1,1,1,1,0,0,0, // ...#####...
-    0,0,1,1,1,1,1,1,1,0,0, // ..#######..
-    1,1,0,0,1,1,1,0,0,1,1, // ##..###..##
-    1,1,1,1,1,1,1,1,1,1,1, // ###########
-    0,0,1,1,0,0,0,1,1,0,0, // ..##...##..
-    0,1,0,0,1,1,1,0,0,1,0, // .#..###..#.
-    1,0,1,1,0,0,0,1,1,0,1  // #.##...##.#
+    static int boss2_data[] = {
+    0,0,1,1,1,0,0,1,1,1,0,0, // Boss 2: Wormling
+    0,1,0,0,0,0,0,0,0,0,1,0,
+    0,1,0,0,1,1,1,1,0,0,1,0,
+    0,1,0,1,1,1,1,1,1,0,1,0,
+    0,0,1,0,0,1,1,0,0,1,0,0,
+    0,0,1,0,0,1,1,0,0,1,0,0,
+    1,1,1,1,1,1,1,1,1,1,1,1,
+    1,0,0,0,1,1,1,1,0,0,0,1,
+    1,0,0,0,0,1,1,0,0,0,0,1,
+    0,1,1,1,0,0,0,0,1,1,1,0
     };
     
-    if (_sprite == 1 && _death == false) {
-        Bitmap invader1(invader1_data,11,8);
+    static int boss3_data[] = {
+    0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0, // Boss 3: Eater of Worlds
+    0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,
+    0,0,0,0,1,1,1,1,1,1,1,1,1,0,0,0,0,
+    0,0,0,1,0,0,1,1,1,1,1,0,0,1,0,0,0,
+    0,0,1,1,0,0,0,1,1,1,0,0,0,1,1,0,0,
+    1,1,1,1,0,0,0,1,0,1,0,0,0,1,1,1,1,
+    0,0,0,1,1,1,1,1,0,1,1,1,1,1,0,0,0,
+    0,0,0,1,0,1,1,1,1,1,1,1,0,1,0,0,0,
+    0,0,1,0,0,1,0,1,0,1,0,1,0,0,1,0,0,
+    0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
+    0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0
+    };
+    
+    if (_sprite == 1 && _death == false) { // set conditions for draw function
+        Bitmap invader1(inv1_resize_data,8,8); // only alive invaders are rendered
         invader1.render(lcd,_x,_y);
         }
     else if (_sprite == 2 && _death == false) {
-        Bitmap invader2(invader2_data,11,8);
+        Bitmap invader2(inv2_resize_data,8,8);
         invader2.render(lcd,_x,_y);
         }
     else if (_sprite == 3 && _death == false) {
-        Bitmap invader3(invader3_data,11,8);
+        Bitmap invader3(inv3_resize_data,8,8);
         invader3.render(lcd,_x,_y);
         }
+    else if (_sprite == 4 && _death == false) {
+        Bitmap boss1(boss1_data,14,11);
+        boss1.render(lcd,_x,_y);
+        _width = 11;
+        _height = 14;
+        }
+    else if (_sprite == 5 && _death == false) {
+        Bitmap boss2(boss2_data,10,12);
+        boss2.render(lcd,_x,_y);
+        _width = 10;
+        _height = 12;
+        }
+    else if (_sprite == 6 && _death == false) {
+        Bitmap boss3(boss3_data,11,17);
+        boss3.render(lcd,_x,_y);
+        _width = 17;
+        _height = 11;
+        }
     else if (_death == true) {printf("Alien is dead");}
     else {printf("Incorrect Sprite Value");}
-    }
 }
     
-int Invader::hit()
+int Invader::hit() // decrement invader hitpoints, and set death if at 0
 {
     _hitpoints--;
     if (_hitpoints <= 0) {
@@ -86,7 +142,7 @@
     return _hitpoints;
 }
 
-bool Invader::get_death()
+bool Invader::get_death() // retrieve death state
 {
     if (_hitpoints <= 0) {
         _death = true;
@@ -96,13 +152,8 @@
 
 Vector2D Invader::get_pos() 
 {
-    Vector2D p = {_x,_y};
-    return p;
-}
-
-int Invader::get_x_pos()
-{
-    return _x;
+    Vector2D pos = {_x,_y};
+    return pos;
 }
 
 int Invader::get_sprite()
@@ -110,13 +161,18 @@
     return _sprite;
 }
 
-int Invader::get_y_pos()
-{
-    return _y;
-}
-
 void Invader::set_pos(int x, int y) 
 {
     _x = x;
     _y = y;
+}
+
+int Invader::get_width() 
+{
+    return _width;
+}
+
+int Invader::get_height()
+{
+    return _height;
 }
\ No newline at end of file