ELEC2645 (2017/18) / Mbed 2 deprecated ll13jrm

Final Commit

Dependencies:   mbed

SnakeEngine/SnakeEngine.cpp@27:bd0f69a75d8b, 2018-05-08 (annotated)

Committer:
JRM1986
Date:
Tue May 08 12:32:46 2018 +0000
Revision:
27:bd0f69a75d8b
Parent:
26:23301f48c1ed 
Final Commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JRM1986 2:ea90cec2489a 1 #include "SnakeEngine.h"
JRM1986 2:ea90cec2489a 2
JRM1986 25:f03439ee32c6 3 ///////////////// constructor/destructor /////////////////
JRM1986 2:ea90cec2489a 4
JRM1986 2:ea90cec2489a 5 SnakeEngine::SnakeEngine()
JRM1986 2:ea90cec2489a 6 {
JRM1986 2:ea90cec2489a 7
JRM1986 2:ea90cec2489a 8 }
JRM1986 2:ea90cec2489a 9
JRM1986 2:ea90cec2489a 10 SnakeEngine::~SnakeEngine()
JRM1986 2:ea90cec2489a 11 {
JRM1986 2:ea90cec2489a 12
JRM1986 7:c38800a428a6 13 }
JRM1986 23:3081be418c89 14 ///////////////// global methods /////////////////
JRM1986 17:94dd8a691d4a 15
JRM1986 16:85ca9feccf3f 16 int g_tail_length()
JRM1986 16:85ca9feccf3f 17 {
JRM1986 16:85ca9feccf3f 18
JRM1986 16:85ca9feccf3f 19 extern int g_tl;
JRM1986 16:85ca9feccf3f 20
JRM1986 16:85ca9feccf3f 21 return g_tl;
JRM1986 16:85ca9feccf3f 22
JRM1986 16:85ca9feccf3f 23 }
JRM1986 16:85ca9feccf3f 24
JRM1986 25:f03439ee32c6 25 void g_frame_time(int frame_time)
JRM1986 25:f03439ee32c6 26 {
JRM1986 25:f03439ee32c6 27
JRM1986 25:f03439ee32c6 28 g_ft = frame_time;
JRM1986 25:f03439ee32c6 29
JRM1986 25:f03439ee32c6 30 }
JRM1986 25:f03439ee32c6 31
JRM1986 17:94dd8a691d4a 32
JRM1986 24:4b180348826e 33 ///////////////// public methods /////////////////
JRM1986 24:4b180348826e 34
JRM1986 25:f03439ee32c6 35 void SnakeEngine::init(Direction in, Direction cur, int snake_pos_x, int snake_pos_y, int n_frames)
JRM1986 7:c38800a428a6 36 {
JRM1986 20:277e88a8185f 37 _snake_pos_x = snake_pos_x;
JRM1986 20:277e88a8185f 38 _snake_pos_y = snake_pos_y;
JRM1986 20:277e88a8185f 39 _in = in;
JRM1986 20:277e88a8185f 40 _cur = cur;
JRM1986 25:f03439ee32c6 41 _n_frames = n_frames;
JRM1986 25:f03439ee32c6 42 g_frame_time(_n_frames);
JRM1986 18:406fc298a7c4 43
JRM1986 20:277e88a8185f 44 _snake.init(_in, _cur, _snake_pos_x, _snake_pos_y);
JRM1986 20:277e88a8185f 45
JRM1986 18:406fc298a7c4 46 _food.init(true);
JRM1986 9:561e5681b7a6 47
JRM1986 8:a2b431b9b3f7 48 }
JRM1986 8:a2b431b9b3f7 49
JRM1986 10:62d8cb7742c3 50 void SnakeEngine::update(Gamepad &pad)
JRM1986 10:62d8cb7742c3 51 {
JRM1986 16:85ca9feccf3f 52 bool food_col;
JRM1986 25:f03439ee32c6 53 int food_spawn_time;
JRM1986 17:94dd8a691d4a 54 ++g_engine_fc;
JRM1986 17:94dd8a691d4a 55
JRM1986 25:f03439ee32c6 56 increase_speed(5, 1.1);
JRM1986 26:23301f48c1ed 57 food_spawn_time = food_spawning_time(3);
JRM1986 25:f03439ee32c6 58 _snake.update(_in, _cur);
JRM1986 26:23301f48c1ed 59 printf("Spawn time %i \n", food_spawn_time);
JRM1986 26:23301f48c1ed 60 // printf("Frame Time %i \n", g_ft);
JRM1986 10:62d8cb7742c3 61
JRM1986 25:f03439ee32c6 62 _food.update(_collision, food_spawn_time);
JRM1986 16:85ca9feccf3f 63 food_col = detect_food_collision(pad);
JRM1986 18:406fc298a7c4 64 _collision = food_col;
JRM1986 16:85ca9feccf3f 65 set_tail_length(food_col);
JRM1986 17:94dd8a691d4a 66 set_tail_array(pad);
JRM1986 25:f03439ee32c6 67 g_wall = detect_wall_collision(pad);
JRM1986 25:f03439ee32c6 68 //printf("%i%", g_wall);
JRM1986 10:62d8cb7742c3 69
JRM1986 10:62d8cb7742c3 70 }
JRM1986 10:62d8cb7742c3 71
JRM1986 10:62d8cb7742c3 72
JRM1986 8:a2b431b9b3f7 73 void SnakeEngine::draw(N5110 &lcd)
JRM1986 8:a2b431b9b3f7 74 {
JRM1986 8:a2b431b9b3f7 75
JRM1986 26:23301f48c1ed 76 // puts frame around the game area
JRM1986 24:4b180348826e 77
JRM1986 8:a2b431b9b3f7 78 lcd.drawRect(0,0,WIDTH,HEIGHT,FILL_TRANSPARENT);
JRM1986 8:a2b431b9b3f7 79 lcd.setContrast(0.5);
JRM1986 24:4b180348826e 80
JRM1986 26:23301f48c1ed 81 // draws food to lcd
JRM1986 26:23301f48c1ed 82
JRM1986 8:a2b431b9b3f7 83 _food.draw(lcd);
JRM1986 26:23301f48c1ed 84
JRM1986 26:23301f48c1ed 85 // draws snake head to lcd
JRM1986 26:23301f48c1ed 86
JRM1986 10:62d8cb7742c3 87 _snake.draw(lcd);
JRM1986 26:23301f48c1ed 88
JRM1986 26:23301f48c1ed 89 // draws snake tail to lcd
JRM1986 26:23301f48c1ed 90
JRM1986 17:94dd8a691d4a 91 draw_tail(lcd);
JRM1986 9:561e5681b7a6 92
JRM1986 16:85ca9feccf3f 93 }
JRM1986 16:85ca9feccf3f 94
JRM1986 24:4b180348826e 95
JRM1986 24:4b180348826e 96 void SnakeEngine::draw_tail(N5110 &lcd)
JRM1986 24:4b180348826e 97 {
JRM1986 24:4b180348826e 98 int length = g_tl;
JRM1986 24:4b180348826e 99 int c;
JRM1986 24:4b180348826e 100 c = g_engine_fc % 2;
JRM1986 24:4b180348826e 101 int i;
JRM1986 24:4b180348826e 102 int x;
JRM1986 24:4b180348826e 103 int y;
JRM1986 24:4b180348826e 104
JRM1986 24:4b180348826e 105 //printf("Odd/Even %i \n", c);
JRM1986 24:4b180348826e 106
JRM1986 24:4b180348826e 107 // runs through each segment in the tail and draws to the lcd
JRM1986 24:4b180348826e 108
JRM1986 24:4b180348826e 109 for(i=0; i<=length; ++i) {
JRM1986 24:4b180348826e 110
JRM1986 24:4b180348826e 111 // when odd draw odd array
JRM1986 24:4b180348826e 112
JRM1986 24:4b180348826e 113 if(c == 1) {
JRM1986 24:4b180348826e 114
JRM1986 24:4b180348826e 115 x = g_odd_array_x[i];
JRM1986 24:4b180348826e 116 y = g_odd_array_y[i];
JRM1986 24:4b180348826e 117
JRM1986 24:4b180348826e 118 lcd.setPixel(x,y,true);
JRM1986 24:4b180348826e 119
JRM1986 24:4b180348826e 120 }
JRM1986 24:4b180348826e 121
JRM1986 24:4b180348826e 122 // when even draw the even array
JRM1986 24:4b180348826e 123
JRM1986 24:4b180348826e 124 else if (c == 0) {
JRM1986 24:4b180348826e 125
JRM1986 24:4b180348826e 126 x = g_even_array_x[i];
JRM1986 24:4b180348826e 127 y = g_even_array_y[i];
JRM1986 24:4b180348826e 128
JRM1986 24:4b180348826e 129 lcd.setPixel(x,y,true);
JRM1986 24:4b180348826e 130
JRM1986 24:4b180348826e 131 }
JRM1986 24:4b180348826e 132
JRM1986 24:4b180348826e 133 }
JRM1986 24:4b180348826e 134 }
JRM1986 24:4b180348826e 135
JRM1986 24:4b180348826e 136
JRM1986 24:4b180348826e 137 void SnakeEngine::get_input(Gamepad &pad)
JRM1986 24:4b180348826e 138 {
JRM1986 24:4b180348826e 139
JRM1986 24:4b180348826e 140 _in = pad.get_direction();
JRM1986 24:4b180348826e 141
JRM1986 24:4b180348826e 142 }
JRM1986 24:4b180348826e 143
JRM1986 16:85ca9feccf3f 144 bool SnakeEngine::detect_food_collision(Gamepad &pad)
JRM1986 16:85ca9feccf3f 145 {
JRM1986 16:85ca9feccf3f 146 Vector2D snake_pos = _snake.get_snake_position();
JRM1986 16:85ca9feccf3f 147 Vector2D food_pos = _food.get_food_position();
JRM1986 16:85ca9feccf3f 148
JRM1986 16:85ca9feccf3f 149 bool success_flag = false;
JRM1986 16:85ca9feccf3f 150
JRM1986 24:4b180348826e 151 // when the position of the head and food are the same return true
JRM1986 24:4b180348826e 152
JRM1986 16:85ca9feccf3f 153 if((snake_pos.x == food_pos.x) && (snake_pos.y == food_pos.y)) {
JRM1986 16:85ca9feccf3f 154
JRM1986 16:85ca9feccf3f 155 success_flag = true;
JRM1986 16:85ca9feccf3f 156
JRM1986 16:85ca9feccf3f 157 }
JRM1986 16:85ca9feccf3f 158
JRM1986 16:85ca9feccf3f 159 else {
JRM1986 16:85ca9feccf3f 160
JRM1986 16:85ca9feccf3f 161 success_flag = false;
JRM1986 16:85ca9feccf3f 162
JRM1986 16:85ca9feccf3f 163 }
JRM1986 16:85ca9feccf3f 164
JRM1986 16:85ca9feccf3f 165 return success_flag;
JRM1986 16:85ca9feccf3f 166
JRM1986 16:85ca9feccf3f 167 }
JRM1986 19:b437806e579b 168 bool SnakeEngine::detect_wall_collision(Gamepad &pad)
JRM1986 19:b437806e579b 169 {
JRM1986 19:b437806e579b 170
JRM1986 19:b437806e579b 171 Vector2D snake_pos = _snake.get_snake_position();
JRM1986 19:b437806e579b 172
JRM1986 19:b437806e579b 173 bool success_flag = false;
JRM1986 19:b437806e579b 174
JRM1986 24:4b180348826e 175 // when an snake position is at an edge return true
JRM1986 24:4b180348826e 176
JRM1986 19:b437806e579b 177 if((snake_pos.x == (0 || 84)) || (snake_pos.y == (0 || 48))) {
JRM1986 19:b437806e579b 178
JRM1986 19:b437806e579b 179 success_flag = true;
JRM1986 19:b437806e579b 180
JRM1986 19:b437806e579b 181 }
JRM1986 19:b437806e579b 182
JRM1986 19:b437806e579b 183 return success_flag;
JRM1986 19:b437806e579b 184
JRM1986 19:b437806e579b 185 }
JRM1986 19:b437806e579b 186
JRM1986 19:b437806e579b 187
JRM1986 16:85ca9feccf3f 188 void SnakeEngine::set_tail_length(bool collision_detected)
JRM1986 16:85ca9feccf3f 189 {
JRM1986 24:4b180348826e 190 // when a collision is detected increment the tail length
JRM1986 16:85ca9feccf3f 191
JRM1986 16:85ca9feccf3f 192 if(collision_detected) {
JRM1986 16:85ca9feccf3f 193
JRM1986 16:85ca9feccf3f 194 ++g_tl;
JRM1986 16:85ca9feccf3f 195
JRM1986 16:85ca9feccf3f 196 }
JRM1986 16:85ca9feccf3f 197
JRM1986 16:85ca9feccf3f 198 else {
JRM1986 16:85ca9feccf3f 199
JRM1986 16:85ca9feccf3f 200 g_tl = g_tl;
JRM1986 16:85ca9feccf3f 201
JRM1986 16:85ca9feccf3f 202 }
JRM1986 16:85ca9feccf3f 203
JRM1986 16:85ca9feccf3f 204 }
JRM1986 16:85ca9feccf3f 205
JRM1986 16:85ca9feccf3f 206 int SnakeEngine::get_tail_length()
JRM1986 16:85ca9feccf3f 207 {
JRM1986 16:85ca9feccf3f 208
JRM1986 16:85ca9feccf3f 209 int length = g_tl;
JRM1986 16:85ca9feccf3f 210
JRM1986 16:85ca9feccf3f 211 return length;
JRM1986 16:85ca9feccf3f 212
JRM1986 16:85ca9feccf3f 213 }
JRM1986 24:4b180348826e 214
JRM1986 24:4b180348826e 215 void SnakeEngine::set_odd_array(Gamepad &pad)
JRM1986 24:4b180348826e 216 {
JRM1986 24:4b180348826e 217
JRM1986 24:4b180348826e 218 int i;
JRM1986 24:4b180348826e 219 int length = g_tl;
JRM1986 24:4b180348826e 220
JRM1986 24:4b180348826e 221 extern int g_even_array_x[100];
JRM1986 24:4b180348826e 222 extern int g_even_array_y[100];
JRM1986 24:4b180348826e 223
JRM1986 24:4b180348826e 224 Vector2D pos = _snake.get_snake_position();
JRM1986 24:4b180348826e 225
JRM1986 24:4b180348826e 226 // sets the first value in the array to the new position
JRM1986 24:4b180348826e 227
JRM1986 24:4b180348826e 228 g_even_array_x[0] = pos.x;
JRM1986 24:4b180348826e 229 g_even_array_y[0] = pos.y;
JRM1986 24:4b180348826e 230
JRM1986 24:4b180348826e 231 // starting from the last element in the arrays work back to zero
JRM1986 24:4b180348826e 232
JRM1986 24:4b180348826e 233 for(i = length; i >= 0; --i) {
JRM1986 24:4b180348826e 234
JRM1986 24:4b180348826e 235 // switch positions of the indexes adding the new head position
JRM1986 24:4b180348826e 236
JRM1986 24:4b180348826e 237 if(i > 0) {
JRM1986 24:4b180348826e 238
JRM1986 24:4b180348826e 239 g_odd_array_x[i] = g_even_array_x[i-1];
JRM1986 24:4b180348826e 240 g_odd_array_y[i] = g_even_array_y[i-1];
JRM1986 24:4b180348826e 241
JRM1986 24:4b180348826e 242 }
JRM1986 24:4b180348826e 243
JRM1986 24:4b180348826e 244 // when snake has no length position 0 is the new position
JRM1986 24:4b180348826e 245
JRM1986 24:4b180348826e 246 else if(i == 0) {
JRM1986 24:4b180348826e 247
JRM1986 24:4b180348826e 248 g_odd_array_x[0] = pos.x;
JRM1986 24:4b180348826e 249 g_odd_array_y[0] = pos.y;
JRM1986 24:4b180348826e 250
JRM1986 24:4b180348826e 251 }
JRM1986 24:4b180348826e 252
JRM1986 24:4b180348826e 253 }
JRM1986 24:4b180348826e 254
JRM1986 24:4b180348826e 255 }
JRM1986 24:4b180348826e 256
JRM1986 24:4b180348826e 257 void SnakeEngine::set_even_array(Gamepad &pad)
JRM1986 24:4b180348826e 258 {
JRM1986 24:4b180348826e 259
JRM1986 24:4b180348826e 260 int i;
JRM1986 24:4b180348826e 261 int length = g_tl;
JRM1986 24:4b180348826e 262
JRM1986 24:4b180348826e 263 extern int g_odd_array_x[100];
JRM1986 24:4b180348826e 264 extern int g_odd_array_y[100];
JRM1986 24:4b180348826e 265
JRM1986 24:4b180348826e 266 Vector2D pos = _snake.get_snake_position();
JRM1986 24:4b180348826e 267
JRM1986 24:4b180348826e 268 // sets the first value in the array to the new position
JRM1986 24:4b180348826e 269
JRM1986 24:4b180348826e 270 g_odd_array_x[0] = pos.x;
JRM1986 24:4b180348826e 271 g_odd_array_y[0] = pos.y;
JRM1986 24:4b180348826e 272
JRM1986 24:4b180348826e 273 // starting from the last element in the arrays work back to zero
JRM1986 24:4b180348826e 274
JRM1986 24:4b180348826e 275 for(i = length; i >= 0; --i) {
JRM1986 24:4b180348826e 276
JRM1986 24:4b180348826e 277 // switch positions of the indexes adding the new head position
JRM1986 24:4b180348826e 278
JRM1986 24:4b180348826e 279 if(i > 0) {
JRM1986 24:4b180348826e 280
JRM1986 24:4b180348826e 281 g_even_array_x[i] = g_odd_array_x[i-1];
JRM1986 24:4b180348826e 282 g_even_array_y[i] = g_odd_array_y[i-1];
JRM1986 24:4b180348826e 283
JRM1986 24:4b180348826e 284 }
JRM1986 24:4b180348826e 285
JRM1986 24:4b180348826e 286 // when snake has no length position 0 is the new position
JRM1986 24:4b180348826e 287
JRM1986 24:4b180348826e 288 else if(i == 0) {
JRM1986 24:4b180348826e 289
JRM1986 24:4b180348826e 290 g_even_array_x[0] = pos.x;
JRM1986 24:4b180348826e 291 g_even_array_y[0] = pos.y;
JRM1986 24:4b180348826e 292
JRM1986 24:4b180348826e 293 }
JRM1986 24:4b180348826e 294
JRM1986 24:4b180348826e 295 }
JRM1986 24:4b180348826e 296
JRM1986 24:4b180348826e 297 }
JRM1986 24:4b180348826e 298
JRM1986 24:4b180348826e 299
JRM1986 24:4b180348826e 300 void SnakeEngine::set_tail_array(Gamepad &pad)
JRM1986 24:4b180348826e 301 {
JRM1986 24:4b180348826e 302
JRM1986 24:4b180348826e 303 int c = g_engine_fc % 2;
JRM1986 24:4b180348826e 304
JRM1986 24:4b180348826e 305 // when the frame counter is odd set odd array
JRM1986 24:4b180348826e 306
JRM1986 24:4b180348826e 307 if(c == 1) {
JRM1986 24:4b180348826e 308
JRM1986 24:4b180348826e 309 set_odd_array(pad);
JRM1986 24:4b180348826e 310
JRM1986 24:4b180348826e 311 }
JRM1986 24:4b180348826e 312
JRM1986 24:4b180348826e 313 // when the frame counter is even set even array
JRM1986 24:4b180348826e 314
JRM1986 24:4b180348826e 315 else if (c == 0) {
JRM1986 24:4b180348826e 316
JRM1986 24:4b180348826e 317 set_even_array(pad);
JRM1986 24:4b180348826e 318
JRM1986 24:4b180348826e 319 }
JRM1986 24:4b180348826e 320
JRM1986 24:4b180348826e 321 }
JRM1986 24:4b180348826e 322
JRM1986 25:f03439ee32c6 323 int SnakeEngine::food_spawning_time(int frame_decrementer)
JRM1986 25:f03439ee32c6 324 {
JRM1986 25:f03439ee32c6 325
JRM1986 25:f03439ee32c6 326 int c = 0;
JRM1986 26:23301f48c1ed 327
JRM1986 26:23301f48c1ed 328 // c is equal to the tail length - an incrementer such that c is never more
JRM1986 26:23301f48c1ed 329 // than 0 and n = frame decremtner away from 0 such that the logic
JRM1986 26:23301f48c1ed 330 // c == 0 works
JRM1986 26:23301f48c1ed 331
JRM1986 25:f03439ee32c6 332 c = g_tl - g_n;
JRM1986 25:f03439ee32c6 333
JRM1986 25:f03439ee32c6 334 //printf("C = %i", c);
JRM1986 25:f03439ee32c6 335
JRM1986 26:23301f48c1ed 336 // the frame periodity must be more than 100 to ensure the game reamains playable
JRM1986 26:23301f48c1ed 337
JRM1986 25:f03439ee32c6 338 if((c == 0) && (g_ft > 100)) {
JRM1986 25:f03439ee32c6 339
JRM1986 25:f03439ee32c6 340 g_n = g_n + frame_decrementer;
JRM1986 25:f03439ee32c6 341
JRM1986 25:f03439ee32c6 342 g_ft -= 10;
JRM1986 25:f03439ee32c6 343
JRM1986 25:f03439ee32c6 344 frame_decrementer += frame_decrementer;
JRM1986 25:f03439ee32c6 345
JRM1986 25:f03439ee32c6 346 }
JRM1986 25:f03439ee32c6 347
JRM1986 25:f03439ee32c6 348 return g_ft;
JRM1986 25:f03439ee32c6 349
JRM1986 25:f03439ee32c6 350 }
JRM1986 25:f03439ee32c6 351
JRM1986 25:f03439ee32c6 352 void SnakeEngine::increase_speed(int resetter, float speed_decrementer)
JRM1986 25:f03439ee32c6 353 {
JRM1986 25:f03439ee32c6 354
JRM1986 25:f03439ee32c6 355 int c = 0;
JRM1986 25:f03439ee32c6 356 c = g_tl - g_n;
JRM1986 25:f03439ee32c6 357 if(g_tl == 0) {
JRM1986 25:f03439ee32c6 358
JRM1986 25:f03439ee32c6 359 g_speed = 0.4;
JRM1986 16:85ca9feccf3f 360
JRM1986 25:f03439ee32c6 361 }
JRM1986 25:f03439ee32c6 362
JRM1986 25:f03439ee32c6 363 if(c == 0) {
JRM1986 25:f03439ee32c6 364
JRM1986 25:f03439ee32c6 365 g_n = g_n + resetter;
JRM1986 25:f03439ee32c6 366
JRM1986 25:f03439ee32c6 367 g_speed = g_speed/speed_decrementer;
JRM1986 25:f03439ee32c6 368
JRM1986 25:f03439ee32c6 369 resetter += resetter;
JRM1986 25:f03439ee32c6 370
JRM1986 25:f03439ee32c6 371 }
JRM1986 25:f03439ee32c6 372
JRM1986 25:f03439ee32c6 373 }
JRM1986 25:f03439ee32c6 374