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

Battle/Battle.cpp@10:19b250c7de5e, 2020-05-18 (annotated)

Committer:
helioslyons
Date:
Mon May 18 18:14:35 2020 +0000
Revision:
10:19b250c7de5e
Parent:
9:6a245c8ce08e
Child:
11:1fd8fca23375
Helios Lyons 201239214

Who changed what in which revision?

UserRevisionLine numberNew contents of line
helioslyons 9:6a245c8ce08e 1 #include "Battle.h"
helioslyons 10:19b250c7de5e 2 #include "Bullet.h"
helioslyons 10:19b250c7de5e 3 #include "Invader.h"
helioslyons 10:19b250c7de5e 4 #include "Army.h"
helioslyons 10:19b250c7de5e 5
helioslyons 10:19b250c7de5e 6 #include "N5110.h"
helioslyons 10:19b250c7de5e 7 #include "Gamepad.h"
helioslyons 10:19b250c7de5e 8
helioslyons 10:19b250c7de5e 9 #include <vector>
helioslyons 9:6a245c8ce08e 10
helioslyons 9:6a245c8ce08e 11 Battle::Battle()
helioslyons 9:6a245c8ce08e 12 {
helioslyons 9:6a245c8ce08e 13
helioslyons 9:6a245c8ce08e 14 }
helioslyons 9:6a245c8ce08e 15
helioslyons 9:6a245c8ce08e 16 Battle::~Battle()
helioslyons 9:6a245c8ce08e 17 {
helioslyons 9:6a245c8ce08e 18
helioslyons 9:6a245c8ce08e 19 }
helioslyons 9:6a245c8ce08e 20
helioslyons 10:19b250c7de5e 21 void Battle::init(int invaders, int speed, int interval)
helioslyons 9:6a245c8ce08e 22 {
helioslyons 10:19b250c7de5e 23 _invaders = invaders;
helioslyons 10:19b250c7de5e 24 _speed = speed;
helioslyons 10:19b250c7de5e 25 _interval = interval;
helioslyons 9:6a245c8ce08e 26
helioslyons 10:19b250c7de5e 27 _army.create_army();
helioslyons 10:19b250c7de5e 28 //_army.start_pos(5,5);
helioslyons 10:19b250c7de5e 29 //_canon.init(44);
helioslyons 9:6a245c8ce08e 30
helioslyons 10:19b250c7de5e 31 //interval.attach(&Battle::player_fire, 8.0);
helioslyons 10:19b250c7de5e 32
helioslyons 9:6a245c8ce08e 33 }
helioslyons 9:6a245c8ce08e 34
helioslyons 9:6a245c8ce08e 35 void Battle::read_input(Gamepad &pad)
helioslyons 9:6a245c8ce08e 36 {
helioslyons 10:19b250c7de5e 37 _d = pad.get_direction();
helioslyons 10:19b250c7de5e 38 _mag = pad.get_mag();
helioslyons 10:19b250c7de5e 39 }
helioslyons 10:19b250c7de5e 40
helioslyons 10:19b250c7de5e 41 void Battle::draw(N5110 &lcd)
helioslyons 10:19b250c7de5e 42 {
helioslyons 10:19b250c7de5e 43 //lcd.drawLine(1,1,WIDTH/2,HEIGHT-1,2);
helioslyons 10:19b250c7de5e 44 print_score(lcd); // score
helioslyons 9:6a245c8ce08e 45
helioslyons 10:19b250c7de5e 46 _canon.draw(lcd); // canon
helioslyons 10:19b250c7de5e 47 _army.draw(lcd); // invaders
helioslyons 10:19b250c7de5e 48
helioslyons 10:19b250c7de5e 49 vector<Bullet>::iterator it1;
helioslyons 10:19b250c7de5e 50 int i;
helioslyons 10:19b250c7de5e 51 vector<Bullet>::iterator it2;
helioslyons 10:19b250c7de5e 52 int n;
helioslyons 10:19b250c7de5e 53
helioslyons 10:19b250c7de5e 54 for (it1 = invBomb.begin(); it1 != invBomb.end(); ++it1, ++i) {
helioslyons 10:19b250c7de5e 55 invBomb[i].draw(lcd);
helioslyons 10:19b250c7de5e 56 }
helioslyons 10:19b250c7de5e 57 for (it2 = playBul.begin(); it2 != playBul.end(); ++it2, ++n) {
helioslyons 10:19b250c7de5e 58 playBul[i].draw(lcd);
helioslyons 10:19b250c7de5e 59 }
helioslyons 10:19b250c7de5e 60 print_score(lcd);
helioslyons 10:19b250c7de5e 61 }
helioslyons 10:19b250c7de5e 62
helioslyons 10:19b250c7de5e 63 void Battle::update(Gamepad &pad)
helioslyons 10:19b250c7de5e 64 {
helioslyons 10:19b250c7de5e 65 // important to update paddles and ball before checking collisions so can
helioslyons 10:19b250c7de5e 66 // correct for it before updating the display
helioslyons 10:19b250c7de5e 67 _canon.update(_d,_mag);
helioslyons 10:19b250c7de5e 68
helioslyons 10:19b250c7de5e 69 invader_fire();
helioslyons 10:19b250c7de5e 70 canon_fire(pad);
helioslyons 10:19b250c7de5e 71
helioslyons 10:19b250c7de5e 72 int i, n;
helioslyons 10:19b250c7de5e 73 vector<Bullet>::iterator it1;
helioslyons 10:19b250c7de5e 74 vector<Bullet>::iterator it2;
helioslyons 10:19b250c7de5e 75
helioslyons 10:19b250c7de5e 76 for (it1 = invBomb.begin(); it1 != invBomb.end(); ++it1, ++i) {
helioslyons 10:19b250c7de5e 77 invBomb[i].update();
helioslyons 10:19b250c7de5e 78 }
helioslyons 10:19b250c7de5e 79 for (it2 = playBul.begin(); it2 != playBul.end(); ++it2, ++n) {
helioslyons 10:19b250c7de5e 80 playBul[i].update();
helioslyons 10:19b250c7de5e 81 }
helioslyons 10:19b250c7de5e 82
helioslyons 10:19b250c7de5e 83 bullet_collisions();
helioslyons 10:19b250c7de5e 84 check_invader_hit(pad);
helioslyons 10:19b250c7de5e 85 check_canon_hit(pad);
helioslyons 9:6a245c8ce08e 86 }
helioslyons 9:6a245c8ce08e 87
helioslyons 9:6a245c8ce08e 88 void Battle::invader_fire()
helioslyons 9:6a245c8ce08e 89 {
helioslyons 10:19b250c7de5e 90 _army.rand_invader();
helioslyons 10:19b250c7de5e 91
helioslyons 10:19b250c7de5e 92 int x1 = _army._fire_x;
helioslyons 10:19b250c7de5e 93 int y1 = _army._fire_y;
helioslyons 10:19b250c7de5e 94
helioslyons 10:19b250c7de5e 95 Bullet bomb; // instantiate new bullet object
helioslyons 10:19b250c7de5e 96 bomb.init(false, x1, y1); // initialise
helioslyons 10:19b250c7de5e 97
helioslyons 10:19b250c7de5e 98 invBomb.push_back(bomb); // add to invader bomb vector
helioslyons 9:6a245c8ce08e 99 }
helioslyons 9:6a245c8ce08e 100
helioslyons 10:19b250c7de5e 101 void Battle::canon_fire(Gamepad &pad)
helioslyons 9:6a245c8ce08e 102 {
helioslyons 10:19b250c7de5e 103 bool A = pad.A_pressed();
helioslyons 10:19b250c7de5e 104 if (A) {
helioslyons 10:19b250c7de5e 105 //
helioslyons 10:19b250c7de5e 106
helioslyons 10:19b250c7de5e 107 Vector2D canon_pos = _canon.get_pos();
helioslyons 10:19b250c7de5e 108 int x1 = canon_pos.x;
helioslyons 10:19b250c7de5e 109 int y1 = canon_pos.y;
helioslyons 10:19b250c7de5e 110
helioslyons 10:19b250c7de5e 111 Bullet shot;
helioslyons 10:19b250c7de5e 112 shot.init(true, x1, y1);
helioslyons 10:19b250c7de5e 113 playBul.push_back(shot);
helioslyons 10:19b250c7de5e 114 }
helioslyons 9:6a245c8ce08e 115 }
helioslyons 9:6a245c8ce08e 116
helioslyons 9:6a245c8ce08e 117 void Battle::check_invader_hit(Gamepad &pad)
helioslyons 9:6a245c8ce08e 118 {
helioslyons 10:19b250c7de5e 119 vector<Bullet>::iterator it1; // Iterate through canon bullet vector
helioslyons 10:19b250c7de5e 120 Vector2D playBulPos; // Use collision function from army to iterate through invaders
helioslyons 10:19b250c7de5e 121 int i; // Match deletes bullet, removes invader
helioslyons 10:19b250c7de5e 122
helioslyons 10:19b250c7de5e 123 for (it1 = playBul.begin(); it1 != playBul.end(); ++it1, ++i) {
helioslyons 10:19b250c7de5e 124
helioslyons 10:19b250c7de5e 125 playBulPos = playBul[i].get_pos();
helioslyons 10:19b250c7de5e 126 int playBulX = playBulPos.x;
helioslyons 10:19b250c7de5e 127 int playBulY = playBulPos.y;
helioslyons 10:19b250c7de5e 128
helioslyons 10:19b250c7de5e 129 _army.check_col(playBulX, playBulY);
helioslyons 10:19b250c7de5e 130 _canon.kill(_army._sprite_pass);
helioslyons 10:19b250c7de5e 131 playBul.erase(playBul.begin() + i - 1);
helioslyons 10:19b250c7de5e 132
helioslyons 10:19b250c7de5e 133 }
helioslyons 9:6a245c8ce08e 134 }
helioslyons 9:6a245c8ce08e 135
helioslyons 9:6a245c8ce08e 136 void Battle::check_canon_hit(Gamepad &pad)
helioslyons 9:6a245c8ce08e 137 {
helioslyons 10:19b250c7de5e 138 vector<Bullet>::iterator it2; // Iterate through invader bomb vector
helioslyons 10:19b250c7de5e 139 Vector2D invBombPos; // If positions are equal, delete bullet and remove life
helioslyons 10:19b250c7de5e 140 Vector2D canonPos;
helioslyons 10:19b250c7de5e 141
helioslyons 10:19b250c7de5e 142 int i;
helioslyons 10:19b250c7de5e 143
helioslyons 10:19b250c7de5e 144 for (it2 = invBomb.begin(); it2 != invBomb.end(); ++it2, ++i) {
helioslyons 10:19b250c7de5e 145
helioslyons 10:19b250c7de5e 146 invBombPos = invBomb[i].get_pos();
helioslyons 10:19b250c7de5e 147 canonPos = _canon.get_pos();
helioslyons 10:19b250c7de5e 148
helioslyons 10:19b250c7de5e 149 if (invBombPos.x == canonPos.x && invBombPos.y == canonPos.y) {
helioslyons 10:19b250c7de5e 150 invBomb.erase(invBomb.begin() + 1 - 1);
helioslyons 10:19b250c7de5e 151 _canon.remove_life();
helioslyons 10:19b250c7de5e 152 }
helioslyons 10:19b250c7de5e 153 }
helioslyons 9:6a245c8ce08e 154 }
helioslyons 9:6a245c8ce08e 155
helioslyons 10:19b250c7de5e 156 void Battle::bullet_collisions()
helioslyons 9:6a245c8ce08e 157 {
helioslyons 10:19b250c7de5e 158 vector<Bullet>::iterator it1;
helioslyons 10:19b250c7de5e 159 vector<Bullet>::iterator it2;
helioslyons 10:19b250c7de5e 160
helioslyons 10:19b250c7de5e 161 Vector2D invBombCol;
helioslyons 10:19b250c7de5e 162 Vector2D playBulCol;
helioslyons 10:19b250c7de5e 163 int i;
helioslyons 10:19b250c7de5e 164
helioslyons 10:19b250c7de5e 165 for (it2 = invBomb.begin(); it2 != invBomb.end(); ++it2, ++i) {
helioslyons 10:19b250c7de5e 166 invBombCol = invBomb[i].get_pos();
helioslyons 10:19b250c7de5e 167
helioslyons 10:19b250c7de5e 168 if (invBombCol.y >= 48){
helioslyons 10:19b250c7de5e 169 invBomb.erase(invBomb.begin() + i - 1);
helioslyons 10:19b250c7de5e 170 }
helioslyons 10:19b250c7de5e 171 }
helioslyons 10:19b250c7de5e 172
helioslyons 10:19b250c7de5e 173 int n;
helioslyons 10:19b250c7de5e 174
helioslyons 10:19b250c7de5e 175 for (it1 = playBul.begin(); it1 != playBul.end(); ++it1, ++n) {
helioslyons 10:19b250c7de5e 176 playBulCol = playBul[n].get_pos();
helioslyons 10:19b250c7de5e 177
helioslyons 10:19b250c7de5e 178 if (playBulCol.x >= 0){
helioslyons 10:19b250c7de5e 179 playBul.erase(playBul.begin() + n - 1);
helioslyons 10:19b250c7de5e 180 }
helioslyons 10:19b250c7de5e 181 }
helioslyons 9:6a245c8ce08e 182 }
helioslyons 9:6a245c8ce08e 183
helioslyons 10:19b250c7de5e 184 void Battle::print_score(N5110 &lcd)
helioslyons 10:19b250c7de5e 185 {
helioslyons 10:19b250c7de5e 186 int total_score = _canon.get_score();
helioslyons 10:19b250c7de5e 187 char buffer[14];
helioslyons 10:19b250c7de5e 188 sprintf(buffer,"%2d",total_score);
helioslyons 10:19b250c7de5e 189 lcd.printString(buffer,42,1);
helioslyons 10:19b250c7de5e 190 }