ELEC2645 (2019/20) / Mbed 2 deprecated ELEC2645_PROJECT_EL18KK

Dependencies:   mbed

Game/Game.cpp@26:04b2d7742a84, 2020-05-25 (annotated)

Committer:
KaifK
Date:
Mon May 25 19:36:07 2020 +0000
Revision:
26:04b2d7742a84
Parent:
25:467d8fd0fec4
Child:
28:215e8327d4e6
Shoot! Game by Kaif Kutchwala v1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
KaifK 4:08a0ff6668df 1 #include "Game.h"
KaifK 25:467d8fd0fec4 2
KaifK 21:d5b1160f349f 3 SDFileSystem sd(PTE3, PTE1, PTE2, PTE4, "sd");
KaifK 20:c697902b844f 4 Ticker ticker;
KaifK 25:467d8fd0fec4 5 FILE *fp;
KaifK 20:c697902b844f 6
KaifK 20:c697902b844f 7 volatile int sound_timer_flag = 0;
KaifK 20:c697902b844f 8 volatile int sound_sample = 0;
KaifK 21:d5b1160f349f 9 volatile int level_flag = 1; //initially set
KaifK 20:c697902b844f 10
KaifK 20:c697902b844f 11 void timer_isr();
KaifK 8:5ede90f99a27 12
KaifK 9:e6566d09f087 13 Game::Game(N5110 &lcd, Gamepad &pad, Ball &ball) {
KaifK 9:e6566d09f087 14 _lcd = &lcd;
KaifK 9:e6566d09f087 15 _pad = &pad;
KaifK 9:e6566d09f087 16 _ball = &ball;
KaifK 9:e6566d09f087 17 }
KaifK 4:08a0ff6668df 18 Game::~Game() {}
KaifK 4:08a0ff6668df 19
KaifK 4:08a0ff6668df 20 void Game::init() {
KaifK 24:c110f92fe266 21 level_flag = 1;
KaifK 4:08a0ff6668df 22 _is_goal = false;
KaifK 8:5ede90f99a27 23 _lives = 3;
KaifK 16:1f196a0e12be 24 _new_lives_threshold = 0;
KaifK 12:ca7329a41fc5 25 _level = 1;
KaifK 8:5ede90f99a27 26 _score = 0;
KaifK 9:e6566d09f087 27 _speed = 0.30f;
KaifK 16:1f196a0e12be 28 _new_speed_threshold = 0.00f;
KaifK 9:e6566d09f087 29 _x_val = 42.00f;
KaifK 9:e6566d09f087 30 _y_val = 0.00f;
KaifK 7:2a3b566aedd3 31 _shot_x = 0;
KaifK 7:2a3b566aedd3 32 _shot_y = 0;
KaifK 22:76bb0f52be8b 33 //Initialising Highscore
KaifK 22:76bb0f52be8b 34 fp = fopen("/sd/highscore.txt", "r"); //check for file
KaifK 25:467d8fd0fec4 35 if (fp == NULL) { // if it can't open the file (file does not exist)
KaifK 22:76bb0f52be8b 36 printf("No exisiting highscore!\n");
KaifK 22:76bb0f52be8b 37 set_highscore(0); // initialise highscore to zero
KaifK 25:467d8fd0fec4 38 } else { // if file exists, read highscore and initialise to that value
KaifK 25:467d8fd0fec4 39 fscanf(fp, "%d", & _highscore);
KaifK 25:467d8fd0fec4 40 printf("Initial Highscore found: %d\n", _highscore);
KaifK 22:76bb0f52be8b 41 set_highscore(_highscore);
KaifK 25:467d8fd0fec4 42 fclose(fp); // ensure you close the file after reading
KaifK 25:467d8fd0fec4 43 }
KaifK 4:08a0ff6668df 44 }
KaifK 9:e6566d09f087 45 void Game::play() {
KaifK 16:1f196a0e12be 46 // if all live are lost game ends
KaifK 25:467d8fd0fec4 47 while (_lives > 0) {
KaifK 17:2fbe40177b9c 48 updateSpeed();
KaifK 25:467d8fd0fec4 49 updateLives();
KaifK 17:2fbe40177b9c 50 updateLevel();
KaifK 17:2fbe40177b9c 51 readInput();
KaifK 25:467d8fd0fec4 52 if (_is_goal) { _score++; }
KaifK 25:467d8fd0fec4 53 else {
KaifK 15:5bf3f951d337 54 // ball should not go through obstacle hence y value limited to 21
KaifK 15:5bf3f951d337 55 // this is done after calculations to ensure accurate results
KaifK 25:467d8fd0fec4 56 if (_shot_y >= 9) { _shot_y = 21; }
KaifK 25:467d8fd0fec4 57 if (_shot_y <= 5) { _shot_y = 3; }
KaifK 25:467d8fd0fec4 58 _lives--;
KaifK 15:5bf3f951d337 59 }
KaifK 25:467d8fd0fec4 60 _ball -> playShot(_shot_x, _shot_y);
KaifK 25:467d8fd0fec4 61 print_goal_message((int) _is_goal);
KaifK 12:ca7329a41fc5 62 }
KaifK 25:467d8fd0fec4 63 if (_score > _highscore) { set_highscore(_score); }
KaifK 25:467d8fd0fec4 64 _pad -> leds(0.0); //turn of all leds
KaifK 8:5ede90f99a27 65 }
KaifK 7:2a3b566aedd3 66
KaifK 9:e6566d09f087 67 void Game::readInput() {
KaifK 25:467d8fd0fec4 68 _pad -> reset_buttons(); //forced debounce/reset
KaifK 9:e6566d09f087 69 _x_val = 42; //reset x_val
KaifK 9:e6566d09f087 70 _y_val = 0; //reset y_val
KaifK 25:467d8fd0fec4 71 while (!_pad -> A_pressed()) {
KaifK 9:e6566d09f087 72 pointer_input();
KaifK 7:2a3b566aedd3 73 }
KaifK 25:467d8fd0fec4 74 _pad -> reset_buttons(); //forced debounce/reset
KaifK 25:467d8fd0fec4 75 while (!_pad -> B_pressed()) {
KaifK 9:e6566d09f087 76 power_meter_input();
KaifK 6:09a555c0d997 77 }
KaifK 8:5ede90f99a27 78 convert_to_shot_x();
KaifK 7:2a3b566aedd3 79 convert_to_shot_y();
KaifK 25:467d8fd0fec4 80 _is_goal = _ball -> isGoal(_level, _shot_x, _shot_y);
KaifK 20:c697902b844f 81 //printf("x val = %.2f \n",_x_val);
KaifK 20:c697902b844f 82 //printf("shot_x val = %d \n",_shot_x);
KaifK 20:c697902b844f 83 //printf("y val = %.2f \n",_y_val);
KaifK 20:c697902b844f 84 //printf("shot_y val = %d \n",_shot_y);
KaifK 6:09a555c0d997 85 }
KaifK 9:e6566d09f087 86 void Game::updateLives() {
KaifK 25:467d8fd0fec4 87 int val[6] = {0, 0, 0, 0, 0, 0};
KaifK 16:1f196a0e12be 88 // +1 life if score hits a multiple of 5 provided less than 3 lives left
KaifK 16:1f196a0e12be 89 //update threshold so lives don't increase if score stays same
KaifK 25:467d8fd0fec4 90 if (_score % 5 == 0 && _score != _new_lives_threshold && _lives != 3) {
KaifK 25:467d8fd0fec4 91 _lives++;
KaifK 16:1f196a0e12be 92 _new_lives_threshold = _score;
KaifK 22:76bb0f52be8b 93 playGoalSound(4);
KaifK 16:1f196a0e12be 94 }
KaifK 20:c697902b844f 95 //printf("Lives = %d \n", _lives);
KaifK 25:467d8fd0fec4 96 switch (_lives) {
KaifK 25:467d8fd0fec4 97 case 0:
KaifK 25:467d8fd0fec4 98 break;
KaifK 25:467d8fd0fec4 99 case 1: //red leds only
KaifK 25:467d8fd0fec4 100 val[0] = val[3] = 1;
KaifK 25:467d8fd0fec4 101 break;
KaifK 25:467d8fd0fec4 102 case 2: //red and yellow leds
KaifK 25:467d8fd0fec4 103 val[0] = val[1] = val[3] = val[4] = 1;
KaifK 25:467d8fd0fec4 104 break;
KaifK 25:467d8fd0fec4 105 case 3: //all leds on
KaifK 25:467d8fd0fec4 106 for (int i = 0; i < 6; i++) { val[i] = 1; }
KaifK 25:467d8fd0fec4 107 break;
KaifK 25:467d8fd0fec4 108 default:
KaifK 25:467d8fd0fec4 109 error("Invalid Number of Lives");
KaifK 25:467d8fd0fec4 110 break;
KaifK 5:ed71996c0534 111 }
KaifK 17:2fbe40177b9c 112 updateLeds(val);
KaifK 5:ed71996c0534 113 }
KaifK 9:e6566d09f087 114 void Game::updateScore() {
KaifK 5:ed71996c0534 115 char buffer[12];
KaifK 25:467d8fd0fec4 116 sprintf(buffer, "%d", _score);
KaifK 25:467d8fd0fec4 117 _lcd -> printString(buffer, 2, 5);
KaifK 9:e6566d09f087 118 }
KaifK 9:e6566d09f087 119 void Game::updateSpeed() {
KaifK 25:467d8fd0fec4 120 if (abs(_speed) <= 3) { // max speed = 3
KaifK 25:467d8fd0fec4 121 if (_score % 3 == 0 && _score != _new_speed_threshold) {
KaifK 26:04b2d7742a84 122 // add 0.2 everytime score hits a multiple of 3
KaifK 26:04b2d7742a84 123 _speed = abs(_speed) + 0.20f;
KaifK 16:1f196a0e12be 124 //update threshold so speed does not increase if score stays same
KaifK 25:467d8fd0fec4 125 _new_speed_threshold = _score;
KaifK 9:e6566d09f087 126 }
KaifK 9:e6566d09f087 127 }
KaifK 20:c697902b844f 128 //printf("speed = %.2f \n", _speed);
KaifK 20:c697902b844f 129 //printf("score = %d \n", _score);
KaifK 5:ed71996c0534 130 }
KaifK 17:2fbe40177b9c 131 void Game::updateLevel() {
KaifK 17:2fbe40177b9c 132 _level = random_level_gen(10); //generate random level
KaifK 25:467d8fd0fec4 133 if (level_flag == 1) { //first level is always level 1
KaifK 21:d5b1160f349f 134 level_flag = 0; //flag always stays 0 after first time
KaifK 25:467d8fd0fec4 135 _level = 1;
KaifK 25:467d8fd0fec4 136 }
KaifK 25:467d8fd0fec4 137 _ball -> set_level(_level); //set level
KaifK 20:c697902b844f 138 //printf("Level (in game) = %d \n", _level);
KaifK 17:2fbe40177b9c 139 }
KaifK 25:467d8fd0fec4 140 void Game::updateLeds(int val[6]) {
KaifK 25:467d8fd0fec4 141 _pad -> led(1, val[0]);
KaifK 25:467d8fd0fec4 142 _pad -> led(2, val[1]);
KaifK 25:467d8fd0fec4 143 _pad -> led(3, val[2]);
KaifK 25:467d8fd0fec4 144 _pad -> led(4, val[3]);
KaifK 25:467d8fd0fec4 145 _pad -> led(5, val[4]);
KaifK 25:467d8fd0fec4 146 _pad -> led(6, val[5]);
KaifK 17:2fbe40177b9c 147 }
KaifK 20:c697902b844f 148 void Game::playGoalSound(int sound) {
KaifK 20:c697902b844f 149 sound_sample = 0;
KaifK 20:c697902b844f 150 float val = 0.0f;
KaifK 20:c697902b844f 151 int NUM_ELEMENTS = 0;
KaifK 26:04b2d7742a84 152 ticker.attach( & timer_isr, 226e-7); //sample rate of sound effects
KaifK 26:04b2d7742a84 153 // set number of elements based on sound required
KaifK 25:467d8fd0fec4 154 if (sound == 1) { NUM_ELEMENTS = NUM_ELEMENTS_1; }
KaifK 25:467d8fd0fec4 155 else if (sound == 2) { NUM_ELEMENTS = NUM_ELEMENTS_3; }
KaifK 25:467d8fd0fec4 156 else if (sound == 3) { NUM_ELEMENTS = NUM_ELEMENTS_2; }
KaifK 25:467d8fd0fec4 157 else if (sound == 4) { NUM_ELEMENTS = NUM_ELEMENTS_4; }
KaifK 25:467d8fd0fec4 158 while (sound_sample <= NUM_ELEMENTS) {
KaifK 20:c697902b844f 159 if (sound_timer_flag == 1) {
KaifK 20:c697902b844f 160 sound_timer_flag = 0;
KaifK 26:04b2d7742a84 161 //play sound effect based on input value
KaifK 20:c697902b844f 162 // convert from 0 to 255 to 0.0 to 1.0
KaifK 25:467d8fd0fec4 163 if (sound == 1) { val = float(miss[sound_sample]) / 256.0f; }
KaifK 25:467d8fd0fec4 164 else if (sound == 2) { val = float(goall[sound_sample]) / 256.0f; }
KaifK 25:467d8fd0fec4 165 else if (sound == 3) { val = float(over[sound_sample]) / 256.0f; }
KaifK 25:467d8fd0fec4 166 else if (sound == 4) { val = float(life[sound_sample]) / 256.0f; }
KaifK 25:467d8fd0fec4 167 _pad -> write_dac(val); // write to DAC
KaifK 22:76bb0f52be8b 168 sound_sample++; // move onto next sample
KaifK 20:c697902b844f 169 }
KaifK 20:c697902b844f 170 }
KaifK 20:c697902b844f 171 }
KaifK 25:467d8fd0fec4 172 void Game::set_highscore(int score) {
KaifK 25:467d8fd0fec4 173 _highscore = score;
KaifK 21:d5b1160f349f 174 fp = fopen("/sd/highscore.txt", "w");
KaifK 25:467d8fd0fec4 175 if (fp == NULL) { // if it can't open the file then print error message
KaifK 21:d5b1160f349f 176 printf("Error! Unable to open file!\n");
KaifK 25:467d8fd0fec4 177 } else { // opened file so can write
KaifK 23:ad9ac069e751 178 printf("Writing to file highscore: %d", _highscore);
KaifK 25:467d8fd0fec4 179 fprintf(fp, "%d", _highscore); // ensure data type matches
KaifK 21:d5b1160f349f 180 printf("Done.\n");
KaifK 25:467d8fd0fec4 181 fclose(fp); // ensure you close the file after writing
KaifK 21:d5b1160f349f 182 }
KaifK 16:1f196a0e12be 183 }
KaifK 16:1f196a0e12be 184 int Game::get_highscore() {
KaifK 21:d5b1160f349f 185 fp = fopen("/sd/highscore.txt", "r");
KaifK 25:467d8fd0fec4 186 if (fp == NULL) { // if it can't open the file then print error message
KaifK 21:d5b1160f349f 187 printf("Error! Unable to open file!\n");
KaifK 25:467d8fd0fec4 188 } else { // opened file so can write
KaifK 25:467d8fd0fec4 189 fscanf(fp, "%d", & _highscore); // ensure data type matches - note address operator (&)
KaifK 21:d5b1160f349f 190 //printf("Read %d from file.\n",_highscore);
KaifK 25:467d8fd0fec4 191 fclose(fp); // ensure you close the file after reading
KaifK 21:d5b1160f349f 192 }
KaifK 16:1f196a0e12be 193 int val = _highscore;
KaifK 25:467d8fd0fec4 194 return val;
KaifK 16:1f196a0e12be 195 }
KaifK 9:e6566d09f087 196 void Game::pointer_input() {
KaifK 9:e6566d09f087 197 updateScore();
KaifK 25:467d8fd0fec4 198 _ball -> displayBackground();
KaifK 25:467d8fd0fec4 199 _ball -> drawBall(BALL_INIT_X, BALL_INIT_Y, 6);
KaifK 7:2a3b566aedd3 200 //draw aim pointer
KaifK 25:467d8fd0fec4 201 _lcd -> drawLine(WIDTH / 2 - 5, 41, _x_val, HEIGHT / 2 + 7, 1); //left side
KaifK 25:467d8fd0fec4 202 _lcd -> drawLine(WIDTH / 2 + 5, 41, _x_val, HEIGHT / 2 + 7, 1); //right side
KaifK 25:467d8fd0fec4 203 _lcd -> drawLine(WIDTH / 2 + 5, 41, WIDTH / 2 - 5, 41, 1); //base
KaifK 7:2a3b566aedd3 204 _x_val += _speed;
KaifK 9:e6566d09f087 205 //printf("dir = %d \n", _speed);
KaifK 25:467d8fd0fec4 206 if ((int) _x_val >= 70) {
KaifK 25:467d8fd0fec4 207 _speed = (-1 * _speed);
KaifK 25:467d8fd0fec4 208 }
KaifK 9:e6566d09f087 209 //pointer points out of screen i.e. 70=84 therefore, switch direction
KaifK 7:2a3b566aedd3 210 //value found through trial and error using print statement
KaifK 25:467d8fd0fec4 211 else if ((int) _x_val <= 12) {
KaifK 25:467d8fd0fec4 212 _speed = abs(_speed);
KaifK 25:467d8fd0fec4 213 }
KaifK 25:467d8fd0fec4 214 _lcd -> refresh();
KaifK 25:467d8fd0fec4 215 _lcd -> clear();
KaifK 7:2a3b566aedd3 216 wait(0.01);
KaifK 7:2a3b566aedd3 217 }
KaifK 9:e6566d09f087 218 void Game::power_meter_input() {
KaifK 9:e6566d09f087 219 updateScore();
KaifK 25:467d8fd0fec4 220 _ball -> displayBackground();
KaifK 25:467d8fd0fec4 221 _ball -> drawBall(BALL_INIT_X, BALL_INIT_Y, 6);
KaifK 7:2a3b566aedd3 222 //keep direction of pointer
KaifK 25:467d8fd0fec4 223 _lcd -> drawLine(WIDTH / 2 - 5, 41, _x_val, HEIGHT / 2 + 7, 1);
KaifK 25:467d8fd0fec4 224 _lcd -> drawLine(WIDTH / 2 + 5, 41, _x_val, HEIGHT / 2 + 7, 1);
KaifK 25:467d8fd0fec4 225 _lcd -> drawLine(WIDTH / 2 + 5, 41, WIDTH / 2 - 5, 41, 1);
KaifK 7:2a3b566aedd3 226 //fill and empty power meter
KaifK 25:467d8fd0fec4 227 _lcd -> drawRect(77, 27, 6, _y_val, FILL_BLACK);
KaifK 25:467d8fd0fec4 228 _y_val += _speed / 2;
KaifK 25:467d8fd0fec4 229 if ((int) _y_val >= 20) {
KaifK 25:467d8fd0fec4 230 _speed = (-1 * _speed);
KaifK 25:467d8fd0fec4 231 } //power meter full
KaifK 25:467d8fd0fec4 232 else if ((int) _y_val <= 0) {
KaifK 25:467d8fd0fec4 233 _speed = abs(_speed);
KaifK 25:467d8fd0fec4 234 } // power meter empty
KaifK 25:467d8fd0fec4 235 _lcd -> refresh();
KaifK 25:467d8fd0fec4 236 _lcd -> clear();
KaifK 7:2a3b566aedd3 237 wait(0.01);
KaifK 7:2a3b566aedd3 238 }
KaifK 7:2a3b566aedd3 239 void Game::convert_to_shot_x() {
KaifK 9:e6566d09f087 240 //convert from range 12-70 (range of pointer) to 0-84 (range of screen)
KaifK 25:467d8fd0fec4 241 _shot_x = ((((int) _x_val - 12) * (84)) / (70 - 12));
KaifK 8:5ede90f99a27 242 //ball misses goal completely
KaifK 25:467d8fd0fec4 243 if (_shot_x <= 7) {
KaifK 25:467d8fd0fec4 244 _shot_x = 0;
KaifK 25:467d8fd0fec4 245 } else if (_shot_x >= 77) {
KaifK 25:467d8fd0fec4 246 _shot_x = 84;
KaifK 25:467d8fd0fec4 247 }
KaifK 7:2a3b566aedd3 248 }
KaifK 7:2a3b566aedd3 249 void Game::convert_to_shot_y() {
KaifK 25:467d8fd0fec4 250 _shot_y = ((((int) _y_val) * (24)) / (20));
KaifK 25:467d8fd0fec4 251 if (_shot_y >= 19) {
KaifK 25:467d8fd0fec4 252 _shot_y = 19;
KaifK 25:467d8fd0fec4 253 } //shot is low, but must enter goal
KaifK 9:e6566d09f087 254 }
KaifK 9:e6566d09f087 255 int Game::random_level_gen(int limit) {
KaifK 25:467d8fd0fec4 256 int number = (rand() % limit) + 1; //random level between 1-limit
KaifK 15:5bf3f951d337 257 return number;
KaifK 15:5bf3f951d337 258 }
KaifK 15:5bf3f951d337 259 void Game::print_goal_message(int n) {
KaifK 25:467d8fd0fec4 260 _ball -> displayBackground();
KaifK 25:467d8fd0fec4 261 _lcd -> drawRect(0, 14, 84, 11, FILL_WHITE); //white background
KaifK 25:467d8fd0fec4 262 _lcd -> drawRect(0, 14, 84, 11, FILL_TRANSPARENT); //black outline
KaifK 25:467d8fd0fec4 263
KaifK 25:467d8fd0fec4 264 switch (n) {
KaifK 25:467d8fd0fec4 265 case 0:
KaifK 25:467d8fd0fec4 266 _lcd -> printString("MISS!", 30, 2);
KaifK 25:467d8fd0fec4 267 break;
KaifK 25:467d8fd0fec4 268 case 1:
KaifK 25:467d8fd0fec4 269 _lcd -> printString("GOAL!", 30, 2);
KaifK 25:467d8fd0fec4 270 break;
KaifK 25:467d8fd0fec4 271 }
KaifK 25:467d8fd0fec4 272 _lcd -> refresh();
KaifK 22:76bb0f52be8b 273 wait(0.5);
KaifK 26:04b2d7742a84 274 // adding 1 offsets the range of inputs from 0-1 to 1-2 (needed for function)
KaifK 25:467d8fd0fec4 275 playGoalSound((int) _is_goal + 1);
KaifK 25:467d8fd0fec4 276 wait(1);
KaifK 7:2a3b566aedd3 277 }
KaifK 20:c697902b844f 278 void timer_isr() {
KaifK 20:c697902b844f 279 sound_timer_flag = 1; // set flag in the isr
KaifK 25:467d8fd0fec4 280 }