ELEC2645 (2019/20)
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.
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)
Invaders/Army.cpp@11:1fd8fca23375, 2020-05-27 (annotated)
- Committer:
- helioslyons
- Date:
- Wed May 27 05:07:34 2020 +0000
- Revision:
- 11:1fd8fca23375
- Parent:
- 10:19b250c7de5e
Helios A. Lyons 201239214;
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| helioslyons | 4:c644522ff9d9 | 1 | #include "Army.h" |
| helioslyons | 5:72f59786b695 | 2 | #include "Invader.h" |
| helioslyons | 8:ec4199484adf | 3 | #include "mbed.h" |
| helioslyons | 8:ec4199484adf | 4 | #include "N5110.h" |
| helioslyons | 8:ec4199484adf | 5 | #include "Gamepad.h" |
| helioslyons | 9:6a245c8ce08e | 6 | |
| helioslyons | 9:6a245c8ce08e | 7 | #include <cstdlib> |
| helioslyons | 4:c644522ff9d9 | 8 | #include <vector> |
| helioslyons | 11:1fd8fca23375 | 9 | #include <algorithm> |
| helioslyons | 11:1fd8fca23375 | 10 | #include <functional> |
| helioslyons | 11:1fd8fca23375 | 11 | |
| helioslyons | 11:1fd8fca23375 | 12 | |
| helioslyons | 11:1fd8fca23375 | 13 | using namespace std; |
| helioslyons | 11:1fd8fca23375 | 14 | |
| helioslyons | 11:1fd8fca23375 | 15 | std::vector<std::vector<Invader*> > invaders; |
| helioslyons | 4:c644522ff9d9 | 16 | |
| helioslyons | 4:c644522ff9d9 | 17 | Army::Army() |
| helioslyons | 4:c644522ff9d9 | 18 | { |
| helioslyons | 6:e3a1bfbb1627 | 19 | |
| helioslyons | 4:c644522ff9d9 | 20 | } |
| helioslyons | 6:e3a1bfbb1627 | 21 | |
| helioslyons | 4:c644522ff9d9 | 22 | Army::~Army() |
| helioslyons | 4:c644522ff9d9 | 23 | { |
| helioslyons | 6:e3a1bfbb1627 | 24 | |
| helioslyons | 4:c644522ff9d9 | 25 | } |
| helioslyons | 6:e3a1bfbb1627 | 26 | |
| helioslyons | 11:1fd8fca23375 | 27 | void Army::create_army(int rows, int columns, int speed, bool ifboss, int bossNum) |
| helioslyons | 6:e3a1bfbb1627 | 28 | { |
| helioslyons | 11:1fd8fca23375 | 29 | _rows = rows; // assign variables |
| helioslyons | 11:1fd8fca23375 | 30 | _columns = columns; |
| helioslyons | 11:1fd8fca23375 | 31 | _boss = ifboss; |
| helioslyons | 11:1fd8fca23375 | 32 | |
| helioslyons | 11:1fd8fca23375 | 33 | invaders.clear(); // free memory from previous instances of the vector |
| helioslyons | 11:1fd8fca23375 | 34 | invaders.resize(_rows); // clear contents and resize to given # of rows, columns |
| helioslyons | 11:1fd8fca23375 | 35 | for (size_t i = 0; i < _rows; ++i) { invaders[i].resize(_columns); } |
| helioslyons | 11:1fd8fca23375 | 36 | |
| helioslyons | 11:1fd8fca23375 | 37 | int vector_width = _columns*8 + _columns; // calculate parameters of the vector |
| helioslyons | 11:1fd8fca23375 | 38 | int temp_x = WIDTH/2 - vector_width/2; // as a table, to allow proper Invader |
| helioslyons | 11:1fd8fca23375 | 39 | int start_y = HEIGHT/2 - 20; // distribution |
| helioslyons | 11:1fd8fca23375 | 40 | _inc = 6; |
| helioslyons | 6:e3a1bfbb1627 | 41 | |
| helioslyons | 11:1fd8fca23375 | 42 | for (int i = 0; i < _rows; i++) { // nested 'for' looped through the vector |
| helioslyons | 11:1fd8fca23375 | 43 | int start_x = temp_x; // reset x position at each row |
| helioslyons | 11:1fd8fca23375 | 44 | if (i > 0) {start_y += 9;} // increment y position from 2nd row onward |
| helioslyons | 11:1fd8fca23375 | 45 | |
| helioslyons | 11:1fd8fca23375 | 46 | for (int n = 0; n < _columns; n++) { // iterate through columns |
| helioslyons | 11:1fd8fca23375 | 47 | invaders[i][n] = new Invader(); // instantiate a new Invader pointer |
| helioslyons | 11:1fd8fca23375 | 48 | if (_boss) { // change sprite value if boss wave |
| helioslyons | 11:1fd8fca23375 | 49 | int bossSprite = bossNum + 3; |
| helioslyons | 11:1fd8fca23375 | 50 | invaders[i][n]->init(bossSprite,bossNum*2,1); // |
| helioslyons | 11:1fd8fca23375 | 51 | invaders[i][n]->set_pos(start_x,start_y); |
| helioslyons | 11:1fd8fca23375 | 52 | } |
| helioslyons | 11:1fd8fca23375 | 53 | else { |
| helioslyons | 11:1fd8fca23375 | 54 | invaders[i][n]->init(i+1,1,0); // initialise with sprite, HP, speed, and boss boolean |
| helioslyons | 11:1fd8fca23375 | 55 | invaders[i][n]->set_pos(start_x,start_y); |
| helioslyons | 11:1fd8fca23375 | 56 | int rowWidth = invaders[i][n]->get_width(); |
| helioslyons | 11:1fd8fca23375 | 57 | start_x += rowWidth + 2; // increment x position |
| helioslyons | 11:1fd8fca23375 | 58 | } |
| helioslyons | 11:1fd8fca23375 | 59 | } |
| helioslyons | 6:e3a1bfbb1627 | 60 | } |
| helioslyons | 6:e3a1bfbb1627 | 61 | } |
| helioslyons | 6:e3a1bfbb1627 | 62 | |
| helioslyons | 11:1fd8fca23375 | 63 | bool Army::end() // find # of dead invaders and compare to expected result |
| helioslyons | 6:e3a1bfbb1627 | 64 | { |
| helioslyons | 11:1fd8fca23375 | 65 | int sum = 0; |
| helioslyons | 11:1fd8fca23375 | 66 | for (int i = 0; i < _rows; i++) { // iterate through Invader vector |
| helioslyons | 11:1fd8fca23375 | 67 | for (int n = 0; n < _columns; n++) { // and get death state for each |
| helioslyons | 11:1fd8fca23375 | 68 | bool inv_death = invaders[i][n]->get_death(); |
| helioslyons | 11:1fd8fca23375 | 69 | if (inv_death) {sum++;} // add to sum |
| helioslyons | 7:5fe9ac6522c5 | 70 | } |
| helioslyons | 7:5fe9ac6522c5 | 71 | } |
| helioslyons | 11:1fd8fca23375 | 72 | |
| helioslyons | 11:1fd8fca23375 | 73 | if (sum == _rows*_columns) { // check sum vs. total number of invaders |
| helioslyons | 11:1fd8fca23375 | 74 | _end = true; |
| helioslyons | 11:1fd8fca23375 | 75 | return _end; |
| helioslyons | 7:5fe9ac6522c5 | 76 | } |
| helioslyons | 7:5fe9ac6522c5 | 77 | |
| helioslyons | 7:5fe9ac6522c5 | 78 | else { |
| helioslyons | 11:1fd8fca23375 | 79 | _end = false; |
| helioslyons | 11:1fd8fca23375 | 80 | return _end; |
| helioslyons | 7:5fe9ac6522c5 | 81 | } |
| helioslyons | 6:e3a1bfbb1627 | 82 | } |
| helioslyons | 8:ec4199484adf | 83 | |
| helioslyons | 11:1fd8fca23375 | 84 | void Army::draw(N5110 &lcd) // call draw for alive invaders |
| helioslyons | 11:1fd8fca23375 | 85 | { |
| helioslyons | 11:1fd8fca23375 | 86 | for (int i = 0; i < _rows; i++) { // iterate through Invader vector |
| helioslyons | 11:1fd8fca23375 | 87 | for (int n = 0; n < _columns; n++) { // call draw function if death is false |
| helioslyons | 11:1fd8fca23375 | 88 | bool state = invaders[i][n]->get_death(); |
| helioslyons | 11:1fd8fca23375 | 89 | if (!state) {invaders[i][n]->draw(lcd);} |
| helioslyons | 11:1fd8fca23375 | 90 | } |
| helioslyons | 8:ec4199484adf | 91 | } |
| helioslyons | 8:ec4199484adf | 92 | } |
| helioslyons | 9:6a245c8ce08e | 93 | |
| helioslyons | 11:1fd8fca23375 | 94 | // NOTE: instead of all these 'for' loops, one that checked and deleted dead |
| helioslyons | 11:1fd8fca23375 | 95 | // invaders would have been more efficient, if called prior to draw and |
| helioslyons | 11:1fd8fca23375 | 96 | // collision functions |
| helioslyons | 11:1fd8fca23375 | 97 | |
| helioslyons | 11:1fd8fca23375 | 98 | // NOTE 2: std::for_each could have been used instead of functions called on |
| helioslyons | 11:1fd8fca23375 | 99 | // all invaders, but I could not identify the correct syntax for apply this |
| helioslyons | 11:1fd8fca23375 | 100 | // to a vector of vectors of pointers. |
| helioslyons | 11:1fd8fca23375 | 101 | |
| helioslyons | 11:1fd8fca23375 | 102 | //void Army::move_army() |
| helioslyons | 11:1fd8fca23375 | 103 | |
| helioslyons | 11:1fd8fca23375 | 104 | // removed due to numerous errors, will be fixed if losing 5% is deemed |
| helioslyons | 11:1fd8fca23375 | 105 | // worth it |
| helioslyons | 11:1fd8fca23375 | 106 |