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)
main.cpp@10:19b250c7de5e, 2020-05-18 (annotated)
- Committer:
- helioslyons
- Date:
- Mon May 18 18:14:35 2020 +0000
- Revision:
- 10:19b250c7de5e
- Parent:
- 1:a3f43007030e
- Child:
- 11:1fd8fca23375
Helios Lyons 201239214
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| eencae | 0:b7f1f47bb26a | 1 | /* |
| eencae | 0:b7f1f47bb26a | 2 | ELEC2645 Embedded Systems Project |
| eencae | 0:b7f1f47bb26a | 3 | School of Electronic & Electrical Engineering |
| eencae | 0:b7f1f47bb26a | 4 | University of Leeds |
| eencae | 0:b7f1f47bb26a | 5 | 2019/20 |
| eencae | 0:b7f1f47bb26a | 6 | |
| helioslyons | 1:a3f43007030e | 7 | Name: Helios Ael Lyons |
| helioslyons | 1:a3f43007030e | 8 | Username: mc18hal |
| helioslyons | 1:a3f43007030e | 9 | Student ID Number: 201239214 |
| helioslyons | 1:a3f43007030e | 10 | Date: 24th March 2020 |
| helioslyons | 1:a3f43007030e | 11 | */ |
| helioslyons | 1:a3f43007030e | 12 | |
| helioslyons | 1:a3f43007030e | 13 | /** Main |
| helioslyons | 1:a3f43007030e | 14 | * @brief Main game functions and loop |
| helioslyons | 1:a3f43007030e | 15 | * @author Helios A. Lyons |
| helioslyons | 1:a3f43007030e | 16 | * @date March, 2020 |
| eencae | 0:b7f1f47bb26a | 17 | */ |
| eencae | 0:b7f1f47bb26a | 18 | |
| helioslyons | 10:19b250c7de5e | 19 | ///////// pre-processor directives //////// |
| eencae | 0:b7f1f47bb26a | 20 | #include "mbed.h" |
| eencae | 0:b7f1f47bb26a | 21 | #include "Gamepad.h" |
| eencae | 0:b7f1f47bb26a | 22 | #include "N5110.h" |
| helioslyons | 10:19b250c7de5e | 23 | #include "Battle.h" |
| helioslyons | 10:19b250c7de5e | 24 | |
| helioslyons | 10:19b250c7de5e | 25 | #define PADDLE_WIDTH 2 |
| helioslyons | 10:19b250c7de5e | 26 | #define PADDLE_HEIGHT 8 |
| helioslyons | 10:19b250c7de5e | 27 | #define BALL_SIZE 2 |
| helioslyons | 10:19b250c7de5e | 28 | #define BALL_SPEED 3 |
| helioslyons | 10:19b250c7de5e | 29 | |
| helioslyons | 10:19b250c7de5e | 30 | // structs |
| helioslyons | 10:19b250c7de5e | 31 | struct UserInput { |
| helioslyons | 10:19b250c7de5e | 32 | Direction d; |
| helioslyons | 10:19b250c7de5e | 33 | float mag; |
| helioslyons | 10:19b250c7de5e | 34 | }; |
| helioslyons | 10:19b250c7de5e | 35 | // objects |
| helioslyons | 10:19b250c7de5e | 36 | N5110 lcd; |
| helioslyons | 10:19b250c7de5e | 37 | Gamepad pad; |
| helioslyons | 10:19b250c7de5e | 38 | Battle battle; |
| helioslyons | 10:19b250c7de5e | 39 | |
| helioslyons | 10:19b250c7de5e | 40 | // prototypes |
| helioslyons | 10:19b250c7de5e | 41 | void init(); |
| helioslyons | 10:19b250c7de5e | 42 | void update_game(UserInput input); |
| helioslyons | 10:19b250c7de5e | 43 | void render(); |
| helioslyons | 10:19b250c7de5e | 44 | void welcome(); |
| helioslyons | 10:19b250c7de5e | 45 | |
| helioslyons | 10:19b250c7de5e | 46 | // functions |
| helioslyons | 10:19b250c7de5e | 47 | int main() |
| helioslyons | 10:19b250c7de5e | 48 | { |
| helioslyons | 10:19b250c7de5e | 49 | int fps = 6; // frames per second |
| helioslyons | 10:19b250c7de5e | 50 | |
| helioslyons | 10:19b250c7de5e | 51 | init(); // initialise and then display welcome screen... |
| helioslyons | 10:19b250c7de5e | 52 | welcome(); // waiting for the user to start |
| helioslyons | 10:19b250c7de5e | 53 | |
| helioslyons | 10:19b250c7de5e | 54 | render(); // first draw the initial frame |
| helioslyons | 10:19b250c7de5e | 55 | wait(1.0f/fps); // and wait for one frame period |
| eencae | 0:b7f1f47bb26a | 56 | |
| eencae | 0:b7f1f47bb26a | 57 | |
| helioslyons | 10:19b250c7de5e | 58 | // game loop - read input, update the game state and render the display |
| helioslyons | 10:19b250c7de5e | 59 | while (1) { |
| helioslyons | 10:19b250c7de5e | 60 | //battle.read_input(pad); |
| helioslyons | 10:19b250c7de5e | 61 | //battle.update(pad); |
| helioslyons | 10:19b250c7de5e | 62 | render(); |
| helioslyons | 10:19b250c7de5e | 63 | wait(1.0f/fps); |
| helioslyons | 10:19b250c7de5e | 64 | } |
| helioslyons | 10:19b250c7de5e | 65 | } |
| eencae | 0:b7f1f47bb26a | 66 | |
| helioslyons | 10:19b250c7de5e | 67 | // initialies all classes and libraries |
| helioslyons | 10:19b250c7de5e | 68 | void init() |
| eencae | 0:b7f1f47bb26a | 69 | { |
| helioslyons | 10:19b250c7de5e | 70 | // need to initialise LCD and Gamepad |
| helioslyons | 10:19b250c7de5e | 71 | lcd.init(); |
| helioslyons | 10:19b250c7de5e | 72 | pad.init(); |
| helioslyons | 10:19b250c7de5e | 73 | |
| helioslyons | 10:19b250c7de5e | 74 | // initialise the game |
| helioslyons | 10:19b250c7de5e | 75 | //battle.init(); |
| helioslyons | 10:19b250c7de5e | 76 | |
| eencae | 0:b7f1f47bb26a | 77 | } |
| eencae | 0:b7f1f47bb26a | 78 | |
| helioslyons | 10:19b250c7de5e | 79 | // this function draws each frame on the LCD |
| helioslyons | 10:19b250c7de5e | 80 | void render() |
| helioslyons | 10:19b250c7de5e | 81 | { |
| helioslyons | 10:19b250c7de5e | 82 | // clear screen, re-draw and refresh |
| helioslyons | 10:19b250c7de5e | 83 | lcd.clear(); |
| helioslyons | 10:19b250c7de5e | 84 | //battle.draw(lcd); |
| helioslyons | 10:19b250c7de5e | 85 | lcd.refresh(); |
| helioslyons | 10:19b250c7de5e | 86 | } |
| helioslyons | 10:19b250c7de5e | 87 | |
| helioslyons | 10:19b250c7de5e | 88 | // simple splash screen displayed on start-up |
| helioslyons | 10:19b250c7de5e | 89 | void welcome() { |
| helioslyons | 10:19b250c7de5e | 90 | |
| helioslyons | 10:19b250c7de5e | 91 | lcd.printString("Space Invaders",0,1); |
| helioslyons | 10:19b250c7de5e | 92 | lcd.printString(" Press Start ",0,4); |
| helioslyons | 10:19b250c7de5e | 93 | lcd.refresh(); |
| helioslyons | 10:19b250c7de5e | 94 | |
| helioslyons | 10:19b250c7de5e | 95 | // wait flashing LEDs until start button is pressed |
| helioslyons | 10:19b250c7de5e | 96 | while ( pad.start_pressed() == false) { |
| helioslyons | 10:19b250c7de5e | 97 | lcd.setContrast( pad.read_pot1()); |
| helioslyons | 10:19b250c7de5e | 98 | pad.leds_on(); |
| helioslyons | 10:19b250c7de5e | 99 | wait(0.1); |
| helioslyons | 10:19b250c7de5e | 100 | pad.leds_off(); |
| helioslyons | 10:19b250c7de5e | 101 | wait(0.1); |
| helioslyons | 10:19b250c7de5e | 102 | } |
| helioslyons | 10:19b250c7de5e | 103 | |
| helioslyons | 10:19b250c7de5e | 104 | } |