/TheElements/jni/update.c
C | 407 lines | 340 code | 22 blank | 45 comment | 220 complexity | 6a4f35448fa566ce154cd38424cb119a MD5 | raw file
1/* 2 * update.c 3 * ----------------------------------- 4 * Defines the function UpdateView(), which 5 * is called every frame to update all the 6 * particles' positions. 7 */ 8 9#include "update.h" 10 11void UpdateView(void) 12{ 13 if (shouldClear) 14 { 15 rsetup(); 16 shouldClear = 0; 17 } 18 //If the finger is down 19 if (fd == 1) 20 { 21 if (ym != 0) 22 { 23 int yc; 24 int xc; 25 for (yc = size; yc >= -size; yc--) 26 { 27 for (xc = -size; xc <= size; xc++) 28 { 29 if ((xc * xc) + (yc * yc) <= (size * size)) 30 { 31 //Draw randomized for anything other than non-moving, Eraser, and Drag 32 if (!solid[celement] && celement != 16 && celement!= 3) 33 { 34 if (rand() % 3 == 1 && xc + xm < maxx && xc + xm > 0 && yc + ym < maxy && yc + ym > 0 && allcoords[(int) (xc + xm)][(int) (yc + ym)] == -1) 35 { 36 CreatePoint(xm + xc, ym + yc, celement); 37 } 38 } 39 //Draw fully for anything non-moving 40 else if (solid[celement]) 41 { 42 if (xc + xm < maxx && xc + xm > 0 && yc + ym < maxy && yc + ym > 0 && allcoords[(int) (xc + xm)][(int) (yc + ym)] == -1) 43 { 44 CreatePoint(xm + xc, ym + yc, celement); 45 } 46 } 47 //Special Drag case 48 else if (celement == 16) 49 { 50 if (allcoords[lmx + xc][lmy + yc] != -1 && fallvel[element[allcoords[lmx + xc][lmy + yc]]] != 0 && xc + lmx < maxx && xc + lmx > 0 && yc + lmy < maxy && yc + lmy > 0) 51 { 52 xvel[allcoords[lmx + xc][lmy + yc]] += (xm - lmx); 53 yvel[allcoords[lmx + xc][lmy + yc]] += (ym - lmy); 54 } 55 } 56 //Special Eraser case 57 else 58 { 59 if (allcoords[(int) (xc + xm)][(int) (yc + ym)] != -1 && xc + xm < maxx && xc + xm > 0 && yc + ym < maxy && yc + ym > 0) 60 { 61 DeletePoint(allcoords[xm + xc][ym + yc]); 62 } 63 64 } 65 } 66 } 67 } 68 } 69 70 } 71 72 if (play == 1) 73 { 74 int counter; 75 int rtop; //used to prevent bugs when fire reaches the top 76 77 int tempx, tempy, ox, oy; //For speed we're going to create temp variables to store stuff 78 int oelement; //these are also used to check to see if the element has changed to do stuff about freezing particles 79 80 // Move the particles and do collisions 81 for (counter = 0; counter < TPoints; counter++) 82 { 83 //If the particle is set and unfrozen 84 if (set[counter] && frozen[counter] < 4) 85 { 86 //Random delete of fire 87 int random = rand(); 88 if (element[counter] == 5 && ((random % 7) == 0)) 89 { 90 DeletePoint(counter); 91 continue; 92 } 93 94 //Set the temp and old variables 95 oy = (int) y[counter]; 96 ox = (int) x[counter]; 97 oldy[counter] = oy; 98 oldx[counter] = ox; 99 oelement = element[counter]; 100 101 //If accel control, do yvel based on that 102 if ((int) gravy != 0 && accelcon) 103 { 104 y[counter] += ((gravy / 9.8) * fallvel[oelement] + yvel[counter]); 105 } 106 //Otherwise, just do the fallvelocity 107 else if (accelcon == 0) 108 { 109 y[counter] += fallvel[oelement] + yvel[counter]; 110 } 111 //Accelerometer control, but no gravity (held horizontal) 112 else 113 { 114 y[counter] += yvel[counter]; 115 } 116 117 //If accel control is on, calculate new x using the gravity set 118 if ((int) gravx != 0 && accelcon == 1) 119 { 120 x[counter] += ((gravx / 9.8) * fallvel[oelement] + xvel[counter]); 121 } 122 //Otherwise, just add xvel 123 else 124 { 125 x[counter] += xvel[counter]; 126 } 127 128 129 if (xvel[counter] > 0) 130 { 131 //Check for breaking 132 if ((oelement == 15 || oelement == 21) && xvel[counter] > 5) 133 { 134 element[counter] = 0; //change particle to sand if the velocity on the wall is great enough 135 setBitmapColor((int) x[counter], (int) y[counter], 0); //Set the color also 136 } 137 else if (oelement == 15 || oelement == 21) 138 { 139 x[counter] = ox; 140 y[counter] = oy; 141 xvel[counter] = 0; 142 } 143 else 144 { 145 //Default case: reduce velocity 146 xvel[counter] -= 1; 147 } 148 } 149 else if (xvel[counter] < 0) 150 { 151 //Check for breaking 152 if ((oelement == 15 || oelement == 21) && xvel[counter] < -5) 153 { 154 element[counter] = 0; //change particle to sand if the velocity on the wall is great enough 155 setBitmapColor((int) x[counter], (int) y[counter] ,0); //Set the color also 156 } 157 else if (oelement == 15 || oelement == 21) 158 { 159 x[counter] = ox; 160 y[counter] = oy; 161 xvel[counter] = 0; 162 } 163 else 164 { 165 //Default case: decrease speed by one 166 xvel[counter] += 1; 167 } 168 } 169 170 if (yvel[counter] > 0) 171 { 172 //Check for breaking 173 if ((oelement == 15 || oelement == 21) && yvel[counter] > 5) 174 { 175 element[counter] = 0; //change particle to sand if the velocity on the wall is great enough 176 setBitmapColor((int) x[counter], (int) y[counter], 0); //Set the color also 177 } 178 else if (oelement == 15 || oelement == 21) 179 { 180 x[counter] = ox; 181 y[counter] = oy; 182 yvel[counter] = 0; 183 } 184 else 185 { 186 //Default case: decrease speed by 1 187 yvel[counter] -= 1; 188 } 189 } 190 else if (yvel[counter] < 0) 191 { 192 //Check for breaking 193 if ((oelement == 15 || oelement == 21) && yvel[counter] < -5) 194 { 195 element[counter] = 0; //change particle to sand if the velocity on the wall is great enough 196 setBitmapColor((int) x[counter], (int) y[counter], 0); //Set the color also 197 } 198 else if (oelement == 15 || oelement == 21) 199 { 200 x[counter] = ox; 201 y[counter] = oy; 202 yvel[counter] = 0; 203 } 204 else 205 { 206 //Default case: decrease speed by 1 207 yvel[counter] += 1; 208 } 209 } 210 211 //Boundary checking 212 if ((int) y[counter] >= maxy) 213 { 214 y[counter] = oy; 215 yvel[counter] = 0; 216 xvel[counter] = 0; 217 } 218 if ((int) x[counter] >= maxx || (int) x[counter] <= 0) 219 { 220 x[counter] = ox; 221 xvel[counter] = 0; 222 yvel[counter] = 0; 223 } 224 if ((int) y[counter] <= 0) //If the particle is above the top of the screen 225 { 226 if (element[counter] == 5) //If it's fire 227 { 228 //Move it back 229 y[counter] = oy; 230 x[counter] = ox; 231 //Delete it 232 DeletePoint(counter); 233 continue; 234 } 235 else //Not fire 236 { 237 //Just bounce it back and kill velocity 238 y[counter] = oy; 239 yvel[counter] = 0; 240 xvel[counter] = 0; 241 if (element[counter] == 18) //If it's steam 242 { 243 xvel[counter] = rand() % 3 - 1; //Add a random velocity 244 } 245 } 246 } 247 248 //Set other temp variables for next section 249 tempx = (int) x[counter]; 250 tempy = (int) y[counter]; 251 252 //Special cycles 253 if (fireburn[element[counter]] == 1) //Fire cycle 254 { 255 frozen[counter] = 0; 256 random = rand(); 257 if (collision[element[allcoords[tempx + 1][tempy]]][element[counter]] == 6 && random % 3 != 0) 258 { 259 setElement(allcoords[tempx + 1][tempy], 5); 260 } 261 random = rand(); 262 if (collision[element[allcoords[tempx][tempy - 1]]][element[counter]] == 6 && random % 3 != 0) 263 { 264 setElement(allcoords[tempx][tempy - 1], 5); 265 } 266 random = rand(); 267 if (collision[element[allcoords[tempx - 1][tempy]]][element[counter]] == 6 && random % 3 != 0) 268 { 269 setElement(allcoords[tempx - 1][tempy], 5); 270 } 271 random = rand(); 272 if (collision[element[allcoords[tempx][tempy + 1]]][element[counter]] == 6 && random % 3 != 0) 273 { 274 setElement(allcoords[tempx][tempy + 1], 5); 275 yvel[allcoords[tempx][tempy + 1]] = 2; 276 } 277 random = rand(); 278 if (collision[element[allcoords[tempx + 1][tempy + 1]]][element[counter]] == 6 && random % 3 != 0) 279 { 280 setElement(allcoords[tempx + 1][tempy + 1], 5); 281 yvel[allcoords[tempx][tempy + 1]] = 2; 282 } 283 random = rand(); 284 if (collision[element[allcoords[tempx - 1][tempy + 1]]][element[counter]] == 6 && random % 3 != 0) 285 { 286 setElement(allcoords[tempx - 1][tempy + 1], 5); 287 yvel[allcoords[tempx][tempy + 1]] = 2; 288 } 289 random = rand(); 290 if (collision[element[allcoords[tempx + 1][tempy - 1]]][element[counter]] == 6 && random % 3 != 0) 291 { 292 setElement(allcoords[tempx + 1][tempy - 1], 5); 293 } 294 random = rand(); 295 if (collision[element[allcoords[tempx - 1][tempy - 1]]][element[counter]] == 6 && random % 3 != 0) 296 { 297 setElement(allcoords[tempx - 1][tempy - 1], 5); 298 } 299 } 300 if (element[counter] == 8) //Spawn cycle 301 { 302 frozen[counter] = 0; 303 int check1, check2, temp; 304 for (check1 = -2; check1 <= 2; check1++) 305 { 306 for (check2 = -2; check2 <= 2; check2++) 307 { 308 if (tempx + check1 > 1 && tempx + check1 < maxx && tempy + check2 >= 0 && tempy + check2 < maxy) 309 { 310 temp = allcoords[tempx + check1][tempy + check2]; 311 if (temp != -1 && element[temp] == 7) //There's a generator adjacent 312 { 313 element[temp] = 8; //Change the generator to a spawn 314 spawn[temp] = spawn[counter]; //Make the spawn element the same as this one 315 } 316 else if (temp == -1 && rand() % 200 == 0 && loq < TPoints - 1) //There's an empty spot 317 { 318 CreatePoint(tempx + check1, tempy + check2, spawn[counter]); //1/200 chance of spawning 319 } 320 } 321 } 322 } 323 } 324 if (growing[element[counter]] == 1) //Ice cycle 325 { 326 frozen[counter] = 0; 327 int check1, check2, temp; 328 for (check1 = -1; check1 <= 1; check1++) 329 { 330 for (check2 = -1; check2 <= 1; check2++) 331 { 332 temp = allcoords[tempx + check1][tempy + check2]; 333 if (temp != -1 && element[temp] == 1 && rand() % 10 == 0) 334 { 335 //Change the water to ice 336 setElement(temp, element[counter]); 337 frozen[temp] = 0; 338 } 339 } 340 } 341 } 342 if (condensing[element[counter]] != -1) //Steam cycle 343 { 344 frozen[counter] = 0; 345 if (rand() % 200 == 0) //1/200 chance 346 { 347 setElement(counter, condensing[element[counter]]); //"Condense" the steam 348 } 349 } 350 351 //Updating allcoords and collision resolution 352 int atemporary = allcoords[tempx][tempy]; 353 354 //If the space the particle is trying to move to is taken 355 if (atemporary != -1 && atemporary != counter) 356 { 357 int secondElementTemp = element[atemporary]; 358 359 collide(counter, atemporary); //Call collision() on the two particles 360 361 //If nothing has changed 362 if (x[counter] == ox 363 && y[counter] == oy 364 && element[counter] == oelement 365 && x[atemporary] == tempx 366 && y[atemporary] == tempy 367 && element[atemporary] == secondElementTemp 368 && xvel[counter] == 0 369 && yvel[counter] == 0) 370 { 371 frozen[counter]++; //Increment the frozen count 372 } 373 else 374 { 375 if (x[counter] != ox || y[counter] != oy || element[counter] != oelement) 376 { 377 //unFreeze stuff around the primary particle because stuff has changed with it 378 unFreezeParticles(ox, oy); 379 } 380 if (x[atemporary] != tempx || y[atemporary] != tempy || element[atemporary] != secondElementTemp) 381 { 382 //unFreeze stuff around the secondary particle because stuff has changed with it 383 unFreezeParticles(tempx, tempy); 384 } 385 } 386 } 387 else //Space particle is trying to move to is free or is itself 388 { 389 //Space particle is trying to move to is free 390 if (atemporary != counter) 391 { 392 //Clear the old spot 393 allcoords[ox][oy] = -1; 394 setBitmapColor(ox, oy, 3); 395 396 //Unfreeze particles around old spot 397 unFreezeParticles(ox, oy); 398 399 //Set new spot 400 allcoords[tempx][tempy] = counter; 401 setBitmapColor(tempx, tempy, element[counter]); 402 } 403 } 404 } 405 } 406 } 407}