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

Canon/Canon.cpp@2:ef7f9892ba4f, 2020-04-02 (annotated)

Committer:
helioslyons
Date:
Thu Apr 02 13:03:57 2020 +0000
Revision:
2:ef7f9892ba4f
Child:
3:13fd052f79c6
Helios A. Lyons; 201239214

Who changed what in which revision?

UserRevisionLine numberNew contents of line
helioslyons 2:ef7f9892ba4f 1 #include "Canon.h"
helioslyons 2:ef7f9892ba4f 2
helioslyons 2:ef7f9892ba4f 3 Canon::Canon()
helioslyons 2:ef7f9892ba4f 4 {
helioslyons 2:ef7f9892ba4f 5
helioslyons 2:ef7f9892ba4f 6 }
helioslyons 2:ef7f9892ba4f 7
helioslyons 2:ef7f9892ba4f 8 Canon::~Canon()
helioslyons 2:ef7f9892ba4f 9 {
helioslyons 2:ef7f9892ba4f 10
helioslyons 2:ef7f9892ba4f 11 }
helioslyons 2:ef7f9892ba4f 12
helioslyons 2:ef7f9892ba4f 13 void Canon::init(int x,int height,int width)
helioslyons 2:ef7f9892ba4f 14 {
helioslyons 2:ef7f9892ba4f 15 _y = y; // y value on screen is fixed
helioslyons 2:ef7f9892ba4f 16 _x = WIDTH/2 - width/2; // x depends on height of screen and width of paddle
helioslyons 2:ef7f9892ba4f 17 _y = HEIGHT/2 - height/2;
helioslyons 2:ef7f9892ba4f 18 _height = height;
helioslyons 2:ef7f9892ba4f 19 _width = width;
helioslyons 2:ef7f9892ba4f 20 _speed = 1; // init speed, add in options – accessible?
helioslyons 2:ef7f9892ba4f 21 _score = 0; // start all at 0
helioslyons 2:ef7f9892ba4f 22 _inv1_kill = 0;
helioslyons 2:ef7f9892ba4f 23 _inv2_kill = 0;
helioslyons 2:ef7f9892ba4f 24 _inv3_kill = 0;
helioslyons 2:ef7f9892ba4f 25 _total_kill = 0;
helioslyons 2:ef7f9892ba4f 26 _life = 3;
helioslyons 2:ef7f9892ba4f 27 }
helioslyons 2:ef7f9892ba4f 28
helioslyons 2:ef7f9892ba4f 29 void Canon::draw(N5110 &lcd)
helioslyons 2:ef7f9892ba4f 30 {
helioslyons 2:ef7f9892ba4f 31 // draw canon in screen buffer – need to replace with a different shape
helioslyons 2:ef7f9892ba4f 32 lcd.drawRect(_x,_y,_width,_height,FILL_BLACK);
helioslyons 2:ef7f9892ba4f 33 }
helioslyons 2:ef7f9892ba4f 34
helioslyons 2:ef7f9892ba4f 35 void Canon::update(Direction d,float mag)
helioslyons 2:ef7f9892ba4f 36 {
helioslyons 2:ef7f9892ba4f 37 _speed = int(mag*10.0f); // scale is arbitrary, could be changed in future – add in options menu
helioslyons 2:ef7f9892ba4f 38
helioslyons 2:ef7f9892ba4f 39 // update x value based on direction
helioslyons 2:ef7f9892ba4f 40 // North is decrement as origin is at the top-left so decreasing moves up
helioslyons 2:ef7f9892ba4f 41 if (d == W) {
helioslyons 2:ef7f9892ba4f 42 _x-=_speed;
helioslyons 2:ef7f9892ba4f 43 } else if (d == E) {
helioslyons 2:ef7f9892ba4f 44 _x+=_speed;
helioslyons 2:ef7f9892ba4f 45 }
helioslyons 2:ef7f9892ba4f 46
helioslyons 2:ef7f9892ba4f 47 // check the x origin to set boundaries
helioslyons 2:ef7f9892ba4f 48 if (_x < 1) {
helioslyons 2:ef7f9892ba4f 49 _x = 1;
helioslyons 2:ef7f9892ba4f 50 }
helioslyons 2:ef7f9892ba4f 51 if (_x > WIDTH - _width - 1) {
helioslyons 2:ef7f9892ba4f 52 _x = WIDTH - _width - 1;
helioslyons 2:ef7f9892ba4f 53 }
helioslyons 2:ef7f9892ba4f 54 }
helioslyons 2:ef7f9892ba4f 55
helioslyons 2:ef7f9892ba4f 56 void Canon::add_inv1_kill()
helioslyons 2:ef7f9892ba4f 57 {
helioslyons 2:ef7f9892ba4f 58 _inv1_kill++;
helioslyons 2:ef7f9892ba4f 59 }
helioslyons 2:ef7f9892ba4f 60
helioslyons 2:ef7f9892ba4f 61 void Canon::add_inv2_kill()
helioslyons 2:ef7f9892ba4f 62 {
helioslyons 2:ef7f9892ba4f 63 _inv2_kill++;
helioslyons 2:ef7f9892ba4f 64 }
helioslyons 2:ef7f9892ba4f 65
helioslyons 2:ef7f9892ba4f 66 void Canon::add_inv3_kill()
helioslyons 2:ef7f9892ba4f 67 {
helioslyons 2:ef7f9892ba4f 68 _inv3_kill++;
helioslyons 2:ef7f9892ba4f 69 }
helioslyons 2:ef7f9892ba4f 70
helioslyons 2:ef7f9892ba4f 71 void Canon::add_boss_kill()
helioslyons 2:ef7f9892ba4f 72 {
helioslyons 2:ef7f9892ba4f 73 _boss_kill++;
helioslyons 2:ef7f9892ba4f 74 }
helioslyons 2:ef7f9892ba4f 75
helioslyons 2:ef7f9892ba4f 76 int Canon::get_total_kill()
helioslyons 2:ef7f9892ba4f 77 {
helioslyons 2:ef7f9892ba4f 78 _total_kill = _inv1_kill + _inv2_kill + _inv3_kill + _boss_kill;
helioslyons 2:ef7f9892ba4f 79 return _total_kill;
helioslyons 2:ef7f9892ba4f 80
helioslyons 2:ef7f9892ba4f 81 int Canon::get_score()
helioslyons 2:ef7f9892ba4f 82 {
helioslyons 2:ef7f9892ba4f 83 _score = (_inv1_kill * 10) + (_inv2_kill * 20) + (_inv1_kill * 30) + (_boss_kill * 100);
helioslyons 2:ef7f9892ba4f 84 return _score;
helioslyons 2:ef7f9892ba4f 85 }
helioslyons 2:ef7f9892ba4f 86
helioslyons 2:ef7f9892ba4f 87 Vector2D Canon::get_pos() {
helioslyons 2:ef7f9892ba4f 88 Vector2D p = {_x,_y};
helioslyons 2:ef7f9892ba4f 89 return p;
helioslyons 2:ef7f9892ba4f 90 }
helioslyons 2:ef7f9892ba4f 91
helioslyons 2:ef7f9892ba4f 92 int Canon::get_life()
helioslyons 2:ef7f9892ba4f 93 {
helioslyons 2:ef7f9892ba4f 94 return _life;
helioslyons 2:ef7f9892ba4f 95 }
helioslyons 2:ef7f9892ba4f 96
helioslyons 2:ef7f9892ba4f 97 int Canon::remove_life()
helioslyons 2:ef7f9892ba4f 98 {
helioslyons 2:ef7f9892ba4f 99 _life--;
helioslyons 2:ef7f9892ba4f 100 }
helioslyons 2:ef7f9892ba4f 101
helioslyons 2:ef7f9892ba4f 102 int Canon::reset_life()
helioslyons 2:ef7f9892ba4f 103 {
helioslyons 2:ef7f9892ba4f 104 _life = 3;
helioslyons 2:ef7f9892ba4f 105 }