src/creature/creature.cpp

   1 #include "Composition.hpp"
   2 #include "Creature.hpp"
   3 #include "Genome.hpp"
   4 #include "Memory.hpp"
   5 #include "NameGenerator.hpp"
   6 #include "Situation.hpp"
   7 #include "Steering.hpp"
   8
   9 #include "BlobBackgroundTask.hpp"
  10 #include "Goal.hpp"
  11 #include "IdleGoal.hpp"
  12 #include "../app/Assets.hpp"
  13 #include "../math/const.hpp"
  14 #include "../ui/string.hpp"
  15 #include "../world/Body.hpp"
  16 #include "../world/Planet.hpp"
  17 #include "../world/Simulation.hpp"
  18 #include "../world/TileType.hpp"
  19
  20 #include <algorithm>
  21 #include <sstream>
  22 #include <glm/gtx/transform.hpp>
  23 #include <glm/gtx/vector_angle.hpp>
  24
  25 #include <iostream>
  26 #include <glm/gtx/io.hpp>
  27
  28
  29 namespace blobs {
  30 namespace creature {
  31
  32 Composition::Composition()
  33 : components()
  34 , total_mass(0.0) {
  35 }
  36
  37 Composition::~Composition() {
  38 }
  39
  40 namespace {
  41 bool CompositionCompare(const Composition::Component &a, const Composition::Component &b) {
  42         return b.value < a.value;
  43 }
  44 }
  45
  46 void Composition::Add(int res, double amount) {
  47         bool found = false;
  48         for (auto c = components.begin(); c != components.end(); ++c) {
  49                 if (c->resource == res) {
  50                         c->value += amount;
  51                         if (c->value <= 0.0) {
  52                                 components.erase(c);
  53                         }
  54                         found = true;
  55                         break;
  56                 }
  57         }
  58         if (!found && amount > 0.0) {
  59                 components.emplace_back(res, amount);
  60         }
  61         std::sort(components.begin(), components.end(), CompositionCompare);
  62         total_mass += amount;
  63 }
  64
  65 bool Composition::Has(int res) const noexcept {
  66         for (auto &c : components) {
  67                 if (c.resource == res) {
  68                         return true;
  69                 }
  70         }
  71         return false;
  72 }
  73
  74 double Composition::Get(int res) const noexcept {
  75         for (auto &c : components) {
  76                 if (c.resource == res) {
  77                         return c.value;
  78                 }
  79         }
  80         return 0.0;
  81 }
  82
  83
  84 Creature::Creature(world::Simulation &sim)
  85 : sim(sim)
  86 , name()
  87 , genome()
  88 , properties()
  89 , composition()
  90 , base_color(1.0)
  91 , highlight_color(0.0, 0.0, 0.0, 1.0)
  92 , mass(1.0)
  93 , size(1.0)
  94 , birth(sim.Time())
  95 , death(-1.0)
  96 , on_death()
  97 , removable(false)
  98 , parents()
  99 , stats()
 100 , memory(*this)
 101 , bg_task()
 102 , goals()
 103 , situation()
 104 , steering(*this)
 105 , vao() {
 106         sim.SetAlive(this);
 107         // all creatures avoid each other for now
 108         steering.Separate(0.1, 1.5);
 109 }
 110
 111 Creature::~Creature() {
 112 }
 113
 114 void Creature::AddMass(int res, double amount) {
 115         composition.Add(res, amount);
 116         double nonsolid = 0.0;
 117         double volume = 0.0;
 118         for (const auto &c : composition) {
 119                 volume += c.value / sim.Assets().data.resources[c.resource].density;
 120                 if (sim.Assets().data.resources[c.resource].state != world::Resource::SOLID) {
 121                         nonsolid += c.value;
 122                 }
 123         }
 124         Mass(composition.TotalMass());
 125         Size(std::cbrt(volume));
 126         highlight_color.a = nonsolid / composition.TotalMass();
 127 }
 128
 129 void Creature::HighlightColor(const glm::dvec3 &c) noexcept {
 130         highlight_color = glm::dvec4(c, highlight_color.a);
 131 }
 132
 133 void Creature::Ingest(int res, double amount) noexcept {
 134         // TODO: check foreign materials
 135         if (sim.Resources()[res].state == world::Resource::SOLID) {
 136                 // 15% of solids stays in body
 137                 AddMass(res, amount * 0.15);
 138         } else {
 139                 // 10% of fluids stays in body
 140                 AddMass(res, amount * 0.05);
 141         }
 142         math::GaloisLFSR &random = sim.Assets().random;
 143         if (random.UNorm() < AdaptChance()) {
 144                 // change color to be slightly more like resource
 145                 glm::dvec3 color(rgb2hsl(sim.Resources()[res].base_color));
 146                 // solids affect base color, others highlight
 147                 double p = sim.Resources()[res].state == world::Resource::SOLID ? 0 : 1;
 148                 double q = random.UInt(3); // hue, sat, or val
 149                 double r = random.UInt(2); // mean or deviation
 150                 math::Distribution *d = nullptr;
 151                 double ref = 0.0;
 152                 if (p == 0) {
 153                         if (q == 0) {
 154                                 d = &genome.base_hue;
 155                                 ref = color.x;
 156                         } else if (q == 1) {
 157                                 d = &genome.base_saturation;
 158                                 ref = color.y;
 159                         } else {
 160                                 d = &genome.base_lightness;
 161                                 ref = color.z;
 162                         }
 163                 } else {
 164                         if (q == 0) {
 165                                 d = &genome.highlight_hue;
 166                                 ref = color.x;
 167                         } else if (q == 1) {
 168                                 d = &genome.highlight_saturation;
 169                                 ref = color.y;
 170                         } else {
 171                                 d = &genome.highlight_lightness;
 172                                 ref = color.z;
 173                         }
 174                 }
 175                 if (r == 0) {
 176                         double diff = ref - d->Mean();
 177                         if (q == 0) {
 178                                 if (diff < -0.5) {
 179                                         diff += 1.0;
 180                                 } else if (diff > 0.5) {
 181                                         diff -= 1.0;
 182                                 }
 183                                 // move ±15% of distance
 184                                 d->Mean(std::fmod(d->Mean() + diff * random.SNorm() * 0.15, 1.0));
 185                         } else {
 186                                 d->Mean(glm::clamp(d->Mean() + diff * random.SNorm() * 0.15, 0.0, 1.0));
 187                         }
 188                 } else {
 189                         // scale by ±15%, enforce bounds
 190                         d->StandardDeviation(glm::clamp(d->StandardDeviation() * (1.0 + random.SNorm() * 0.15), 0.0001, 0.5));
 191                 }
 192         }
 193 }
 194
 195 void Creature::DoWork(double amount) noexcept {
 196         stats.Exhaustion().Add(amount / (Stamina() + 1.0));
 197         // burn resources proportional to composition
 198         // factor = 1/total * 1/efficiency * amount * -1
 199         double factor = -amount / (composition.TotalMass() * EnergyEfficiency());
 200         // make a copy to total remains constant and
 201         // no entries disappear during iteration
 202         Composition comp(composition);
 203         for (auto &cmp : comp) {
 204                 double value = cmp.value * factor * sim.Resources()[cmp.resource].inverse_energy;
 205                 AddMass(cmp.resource, value);
 206         }
 207         // doing work improves strength a little
 208         properties.Strength() += amount * 0.0001;
 209 }
 210
 211 void Creature::Hurt(double amount) noexcept {
 212         stats.Damage().Add(amount);
 213         if (stats.Damage().Full()) {
 214                 Die();
 215         }
 216 }
 217
 218 void Creature::Die() noexcept {
 219         if (Dead()) return;
 220
 221         if (stats.Damage().Full()) {
 222                 std::ostream &log = sim.Log() << name << " ";
 223                 if (stats.Exhaustion().Full()) {
 224                         log << "died of exhaustion";
 225                 } else if (stats.Breath().Full()) {
 226                         log << "suffocated";
 227                 } else if (stats.Thirst().Full()) {
 228                         log << "died of thirst";
 229                 } else if (stats.Hunger().Full()) {
 230                         log << "starved to death";
 231                 } else {
 232                         log << "succumed to wounds";
 233                 }
 234                 log << " at an age of " << ui::TimeString(Age())
 235                         << " (" << ui::PercentageString(Age() / properties.Lifetime())
 236                         << " of life expectancy of " << ui::TimeString(properties.Lifetime())
 237                         << ")" << std::endl;
 238         }
 239
 240         sim.SetDead(this);
 241         death = sim.Time();
 242         steering.Off();
 243         if (on_death) {
 244                 on_death(*this);
 245         }
 246         Remove();
 247 }
 248
 249 bool Creature::Dead() const noexcept {
 250         return death > birth;
 251 }
 252
 253 void Creature::Remove() noexcept {
 254         removable = true;
 255 }
 256
 257 void Creature::Removed() noexcept {
 258         bg_task.reset();
 259         goals.clear();
 260         memory.Erase();
 261         KillVAO();
 262 }
 263
 264 void Creature::AddParent(Creature &p) {
 265         parents.push_back(&p);
 266 }
 267
 268 double Creature::Age() const noexcept {
 269         return sim.Time() - birth;
 270 }
 271
 272 double Creature::AgeFactor(double peak) const noexcept {
 273         // shifted inverse hermite, y = 1 - (3t² - 2t³) with t = normalized age - peak
 274         // goes negative below -0.5 and starts to rise again above 1.0
 275         double t = glm::clamp((Age() / properties.Lifetime()) - peak, -0.5, 1.0);
 276         // guarantee at least 1%
 277         return std::max(0.01, 1.0 - (3.0 * t * t) + (2.0 * t * t * t));
 278 }
 279
 280 double Creature::EnergyEfficiency() const noexcept {
 281         return 0.25 * AgeFactor(0.05);
 282 }
 283
 284 double Creature::ExhaustionFactor() const noexcept {
 285         return 1.0 - (glm::smoothstep(0.5, 1.0, stats.Exhaustion().value) * 0.5);
 286 }
 287
 288 double Creature::FatigueFactor() const noexcept {
 289         return 1.0 - (glm::smoothstep(0.5, 1.0, stats.Fatigue().value) * 0.5);
 290 }
 291
 292 double Creature::Strength() const noexcept {
 293         // TODO: replace all age factors with actual growth and decay
 294         return properties.Strength() * ExhaustionFactor() * AgeFactor(0.25);
 295 }
 296
 297 double Creature::Stamina() const noexcept {
 298         return properties.Stamina() * ExhaustionFactor() * AgeFactor(0.25);
 299 }
 300
 301 double Creature::Dexerty() const noexcept {
 302         return properties.Dexerty() * ExhaustionFactor() * AgeFactor(0.25);
 303 }
 304
 305 double Creature::Intelligence() const noexcept {
 306         return properties.Intelligence() * FatigueFactor() * AgeFactor(0.25);
 307 }
 308
 309 double Creature::Lifetime() const noexcept {
 310         return properties.Lifetime();
 311 }
 312
 313 double Creature::Fertility() const noexcept {
 314         return properties.Fertility() * AgeFactor(0.25);
 315 }
 316
 317 double Creature::Mutability() const noexcept {
 318         return properties.Mutability();
 319 }
 320
 321 double Creature::Adaptability() const noexcept {
 322         return properties.Adaptability();
 323 }
 324
 325 double Creature::OffspringMass() const noexcept {
 326         return properties.OffspringMass();
 327 }
 328
 329 double Creature::PerceptionRange() const noexcept {
 330         return 3.0 * (Dexerty() / (Dexerty() + 1)) + Size();
 331 }
 332
 333 double Creature::PerceptionOmniRange() const noexcept {
 334         return 0.5 * (Dexerty() / (Dexerty() + 1)) + Size();
 335 }
 336
 337 double Creature::PerceptionField() const noexcept {
 338         // this is the cosine of half the angle, so 1.0 is none, -1.0 is perfect
 339         return 0.8 - (Dexerty() / (Dexerty() + 1));
 340 }
 341
 342 bool Creature::PerceptionTest(const glm::dvec3 &p) const noexcept {
 343         const glm::dvec3 diff(p - situation.Position());
 344         double omni_range = PerceptionOmniRange();
 345         if (length2(diff) < omni_range * omni_range) return true;
 346         double range = PerceptionRange();
 347         if (length2(diff) > range * range) return false;
 348         return dot(normalize(diff), situation.Heading()) > PerceptionField();
 349 }
 350
 351 double Creature::OffspringChance() const noexcept {
 352         return AgeFactor(0.25) * properties.Fertility() * (1.0 / 3600.0);
 353 }
 354
 355 double Creature::MutateChance() const noexcept {
 356         return GetProperties().Mutability() * (1.0 / 3600.0);
 357 }
 358
 359 double Creature::AdaptChance() const noexcept {
 360         return GetProperties().Adaptability() * (1.0 / 120.0);
 361 }
 362
 363 void Creature::AddGoal(std::unique_ptr<Goal> &&g) {
 364         g->Enable();
 365         if (goals.empty()) {
 366                 g->SetForeground();
 367         }
 368         goals.emplace_back(std::move(g));
 369 }
 370
 371 namespace {
 372
 373 bool GoalCompare(const std::unique_ptr<Goal> &a, const std::unique_ptr<Goal> &b) {
 374         return b->Urgency() < a->Urgency();
 375 }
 376
 377 }
 378
 379 void Creature::Tick(double dt) {
 380         TickState(dt);
 381         TickStats(dt);
 382         TickBrain(dt);
 383 }
 384
 385 void Creature::TickState(double dt) {
 386         steering.MaxSpeed(Dexerty());
 387         steering.MaxForce(Strength());
 388         Situation::State state(situation.GetState());
 389         Situation::Derivative a(Step(Situation::Derivative(), 0.0));
 390         Situation::Derivative b(Step(a, dt * 0.5));
 391         Situation::Derivative c(Step(b, dt * 0.5));
 392         Situation::Derivative d(Step(c, dt));
 393         Situation::Derivative f(
 394                 (1.0 / 6.0) * (a.vel + 2.0 * (b.vel + c.vel) + d.vel),
 395                 (1.0 / 6.0) * (a.acc + 2.0 * (b.acc + c.acc) + d.acc)
 396         );
 397         state.pos += f.vel * dt;
 398         state.vel += f.acc * dt;
 399         situation.EnforceConstraints(state);
 400         if (length2(state.vel) > 0.000001) {
 401                 glm::dvec3 nvel(normalize(state.vel));
 402                 double ang = angle(nvel, state.dir);
 403                 double turn_rate = PI * 0.75 * dt;
 404                 if (ang < turn_rate) {
 405                         state.dir = normalize(state.vel);
 406                 } else if (std::abs(ang - PI) < 0.001) {
 407                         state.dir = rotate(state.dir, turn_rate, situation.GetPlanet().NormalAt(state.pos));
 408                 } else {
 409                         state.dir = rotate(state.dir, turn_rate, normalize(cross(state.dir, nvel)));
 410                 }
 411         }
 412         situation.SetState(state);
 413         // work is force times distance
 414         DoWork(length(f.acc) * Mass() * length(f.vel) * dt);
 415 }
 416
 417 Situation::Derivative Creature::Step(const Situation::Derivative &ds, double dt) const noexcept {
 418         Situation::State s = situation.GetState();
 419         s.pos += ds.vel * dt;
 420         s.vel += ds.acc * dt;
 421         glm::dvec3 force(steering.Force(s));
 422         // gravity = antinormal * mass * Gm / r²
 423         double elevation = situation.GetPlanet().DistanceAt(s.pos);
 424         glm::dvec3 normal(situation.GetPlanet().NormalAt(s.pos));
 425         force += glm::dvec3(
 426                 -normal
 427                 * Mass() * situation.GetPlanet().GravitationalParameter()
 428                 / (elevation * elevation));
 429         // if net force is applied and in contact with surface
 430         if (!allzero(force) && std::abs(std::abs(elevation) - situation.GetPlanet().Radius()) < 0.001) {
 431                 // apply friction = -|normal force| * tangential force * coefficient
 432                 glm::dvec3 fn(normal * dot(force, normal));
 433                 glm::dvec3 ft(force - fn);
 434                 double u = 0.4;
 435                 glm::dvec3 friction(-length(fn) * ft * u);
 436                 force += friction;
 437         }
 438         return {
 439                 s.vel,
 440                 force / Mass()
 441         };
 442 }
 443
 444 void Creature::TickStats(double dt) {
 445         for (auto &s : stats.stat) {
 446                 s.Add(s.gain * dt);
 447         }
 448         // TODO: damage values depending on properties
 449         if (stats.Breath().Full()) {
 450                 constexpr double dps = 1.0 / 4.0;
 451                 Hurt(dps * dt);
 452         }
 453         if (stats.Thirst().Full()) {
 454                 constexpr double dps = 1.0 / 32.0;
 455                 Hurt(dps * dt);
 456         }
 457         if (stats.Hunger().Full()) {
 458                 constexpr double dps = 1.0 / 128.0;
 459                 Hurt(dps * dt);
 460         }
 461         if (!situation.Moving()) {
 462                 // double exhaustion recovery when standing still
 463                 stats.Exhaustion().Add(stats.Exhaustion().gain * dt);
 464         }
 465 }
 466
 467 void Creature::TickBrain(double dt) {
 468         bg_task->Tick(dt);
 469         bg_task->Action();
 470         memory.Tick(dt);
 471         // do background stuff
 472         if (goals.empty()) {
 473                 return;
 474         }
 475         for (auto &goal : goals) {
 476                 goal->Tick(dt);
 477         }
 478         Goal *top = &*goals.front();
 479         // if active goal can be interrupted, check priorities
 480         if (goals.size() > 1 && goals[0]->Interruptible()) {
 481                 std::sort(goals.begin(), goals.end(), GoalCompare);
 482         }
 483         if (&*goals.front() != top) {
 484                 top->SetBackground();
 485                 goals.front()->SetForeground();
 486                 top = &*goals.front();
 487         }
 488         goals[0]->Action();
 489         for (auto goal = goals.begin(); goal != goals.end();) {
 490                 if ((*goal)->Complete()) {
 491                         goals.erase(goal);
 492                 } else {
 493                         ++goal;
 494                 }
 495         }
 496         if (&*goals.front() != top) {
 497                 goals.front()->SetForeground();
 498         }
 499 }
 500
 501 math::AABB Creature::CollisionBox() const noexcept {
 502         return { glm::dvec3(size * -0.5), glm::dvec3(size * 0.5) };
 503 }
 504
 505 glm::dmat4 Creature::CollisionTransform() const noexcept {
 506         const double half_size = size * 0.5;
 507         const glm::dvec3 &pos = situation.Position();
 508         glm::dmat3 orient;
 509         orient[1] = situation.GetPlanet().NormalAt(pos);
 510         orient[2] = situation.Heading();
 511         if (std::abs(dot(orient[1], orient[2])) > 0.999) {
 512                 orient[2] = glm::dvec3(orient[1].z, orient[1].x, orient[1].y);
 513         }
 514         orient[0] = normalize(cross(orient[1], orient[2]));
 515         orient[2] = normalize(cross(orient[0], orient[1]));
 516         return glm::translate(glm::dvec3(pos.x, pos.y, pos.z))
 517                 * glm::dmat4(orient)
 518                 * glm::translate(glm::dvec3(0.0, half_size, 0.0));
 519 }
 520
 521 glm::dmat4 Creature::LocalTransform() noexcept {
 522         const double half_size = size * 0.5;
 523         return CollisionTransform()
 524                 * glm::scale(glm::dvec3(half_size, half_size, half_size));
 525 }
 526
 527 void Creature::BuildVAO() {
 528         vao.reset(new graphics::SimpleVAO<Attributes, unsigned short>);
 529         vao->Bind();
 530         vao->BindAttributes();
 531         vao->EnableAttribute(0);
 532         vao->EnableAttribute(1);
 533         vao->EnableAttribute(2);
 534         vao->AttributePointer<glm::vec3>(0, false, offsetof(Attributes, position));
 535         vao->AttributePointer<glm::vec3>(1, false, offsetof(Attributes, normal));
 536         vao->AttributePointer<glm::vec3>(2, false, offsetof(Attributes, texture));
 537         vao->ReserveAttributes(6 * 4, GL_STATIC_DRAW);
 538         {
 539                 auto attrib = vao->MapAttributes(GL_WRITE_ONLY);
 540                 const float offset = 1.0f;
 541                 for (int surface = 0; surface < 6; ++surface) {
 542                         const float tex_u_begin = surface < 3 ? 1.0f : 0.0f;
 543                         const float tex_u_end = surface < 3 ? 0.0f : 1.0f;
 544
 545                         attrib[4 * surface + 0].position[(surface + 0) % 3] = -offset;
 546                         attrib[4 * surface + 0].position[(surface + 1) % 3] = -offset;
 547                         attrib[4 * surface + 0].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 548                         attrib[4 * surface + 0].normal[(surface + 0) % 3] = 0.0f;
 549                         attrib[4 * surface + 0].normal[(surface + 1) % 3] = 0.0f;
 550                         attrib[4 * surface + 0].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 551                         attrib[4 * surface + 0].texture.x = tex_u_begin;
 552                         attrib[4 * surface + 0].texture.y = 1.0f;
 553                         attrib[4 * surface + 0].texture.z = surface;
 554
 555                         attrib[4 * surface + 1].position[(surface + 0) % 3] = -offset;
 556                         attrib[4 * surface + 1].position[(surface + 1) % 3] =  offset;
 557                         attrib[4 * surface + 1].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 558                         attrib[4 * surface + 1].normal[(surface + 0) % 3] = 0.0f;
 559                         attrib[4 * surface + 1].normal[(surface + 1) % 3] = 0.0f;
 560                         attrib[4 * surface + 1].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 561                         attrib[4 * surface + 1].texture.x = tex_u_end;
 562                         attrib[4 * surface + 1].texture.y = 1.0f;
 563                         attrib[4 * surface + 1].texture.z = surface;
 564
 565                         attrib[4 * surface + 2].position[(surface + 0) % 3] =  offset;
 566                         attrib[4 * surface + 2].position[(surface + 1) % 3] = -offset;
 567                         attrib[4 * surface + 2].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 568                         attrib[4 * surface + 2].normal[(surface + 0) % 3] = 0.0f;
 569                         attrib[4 * surface + 2].normal[(surface + 1) % 3] = 0.0f;
 570                         attrib[4 * surface + 2].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 571                         attrib[4 * surface + 2].texture.x = tex_u_begin;
 572                         attrib[4 * surface + 2].texture.y = 0.0f;
 573                         attrib[4 * surface + 2].texture.z = surface;
 574
 575                         attrib[4 * surface + 3].position[(surface + 0) % 3] = offset;
 576                         attrib[4 * surface + 3].position[(surface + 1) % 3] = offset;
 577                         attrib[4 * surface + 3].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 578                         attrib[4 * surface + 3].normal[(surface + 0) % 3] = 0.0f;
 579                         attrib[4 * surface + 3].normal[(surface + 1) % 3] = 0.0f;
 580                         attrib[4 * surface + 3].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 581                         attrib[4 * surface + 3].texture.x = tex_u_end;
 582                         attrib[4 * surface + 3].texture.y = 0.0f;
 583                         attrib[4 * surface + 3].texture.z = surface;
 584                 }
 585         }
 586         vao->BindElements();
 587         vao->ReserveElements(6 * 6, GL_STATIC_DRAW);
 588         {
 589                 auto element = vao->MapElements(GL_WRITE_ONLY);
 590                 for (int surface = 0; surface < 3; ++surface) {
 591                         element[6 * surface + 0] = 4 * surface + 0;
 592                         element[6 * surface + 1] = 4 * surface + 2;
 593                         element[6 * surface + 2] = 4 * surface + 1;
 594                         element[6 * surface + 3] = 4 * surface + 1;
 595                         element[6 * surface + 4] = 4 * surface + 2;
 596                         element[6 * surface + 5] = 4 * surface + 3;
 597                 }
 598                 for (int surface = 3; surface < 6; ++surface) {
 599                         element[6 * surface + 0] = 4 * surface + 0;
 600                         element[6 * surface + 1] = 4 * surface + 1;
 601                         element[6 * surface + 2] = 4 * surface + 2;
 602                         element[6 * surface + 3] = 4 * surface + 2;
 603                         element[6 * surface + 4] = 4 * surface + 1;
 604                         element[6 * surface + 5] = 4 * surface + 3;
 605                 }
 606         }
 607         vao->Unbind();
 608 }
 609
 610 void Creature::KillVAO() {
 611         vao.reset();
 612 }
 613
 614 void Creature::Draw(graphics::Viewport &viewport) {
 615         if (!vao) return;
 616         vao->Bind();
 617         vao->DrawTriangles(6 * 6);
 618 }
 619
 620
 621 void Spawn(Creature &c, world::Planet &p) {
 622         p.AddCreature(&c);
 623         c.GetSituation().SetPlanetSurface(p, glm::dvec3(0.0, 0.0, p.Radius()));
 624         c.GetSituation().Heading(glm::dvec3(1.0, 0.0, 0.0));
 625
 626         // probe surrounding area for common resources
 627         int start = p.SideLength() / 2 - 2;
 628         int end = start + 5;
 629         std::map<int, double> yields;
 630         for (int y = start; y < end; ++y) {
 631                 for (int x = start; x < end; ++x) {
 632                         const world::TileType &t = p.TypeAt(0, x, y);
 633                         for (auto yield : t.resources) {
 634                                 yields[yield.resource] += yield.ubiquity;
 635                         }
 636                 }
 637         }
 638         int liquid = -1;
 639         int solid = -1;
 640         for (auto e : yields) {
 641                 if (c.GetSimulation().Resources()[e.first].state == world::Resource::LIQUID) {
 642                         if (liquid < 0 || e.second > yields[liquid]) {
 643                                 liquid = e.first;
 644                         }
 645                 } else if (c.GetSimulation().Resources()[e.first].state == world::Resource::SOLID) {
 646                         if (solid < 0 || e.second > yields[solid]) {
 647                                 solid = e.first;
 648                         }
 649                 }
 650         }
 651
 652         Genome genome;
 653         genome.properties.Strength() = { 2.0, 0.1 };
 654         genome.properties.Stamina() = { 2.0, 0.1 };
 655         genome.properties.Dexerty() = { 2.0, 0.1 };
 656         genome.properties.Intelligence() = { 1.0, 0.1 };
 657         genome.properties.Lifetime() = { 480.0, 60.0 };
 658         genome.properties.Fertility() = { 0.5, 0.03 };
 659         genome.properties.Mutability() = { 0.9, 0.1 };
 660         genome.properties.Adaptability() = { 0.9, 0.1 };
 661         genome.properties.OffspringMass() = { 0.3, 0.02 };
 662
 663         glm::dvec3 color_avg(0.0);
 664         double color_divisor = 0.0;
 665
 666         if (p.HasAtmosphere()) {
 667                 c.AddMass(p.Atmosphere(), 0.01);
 668                 color_avg += c.GetSimulation().Resources()[p.Atmosphere()].base_color * 0.1;
 669                 color_divisor += 0.1;
 670         }
 671         if (liquid > -1) {
 672                 c.AddMass(liquid, 0.3);
 673                 color_avg += c.GetSimulation().Resources()[liquid].base_color * 0.5;
 674                 color_divisor += 0.5;
 675         }
 676         if (solid > -1) {
 677                 c.AddMass(solid, 0.1);
 678                 color_avg += c.GetSimulation().Resources()[solid].base_color;
 679                 color_divisor += 1.0;
 680         }
 681
 682         if (color_divisor > 0.001) {
 683                 color_avg /= color_divisor;
 684         }
 685         glm::dvec3 hsl = rgb2hsl(color_avg);
 686         genome.base_hue = { hsl.x, 0.01 };
 687         genome.base_saturation = { hsl.y, 0.01 };
 688         genome.base_lightness = { hsl.z, 0.01 };
 689         // use opposite color as start highlight
 690         genome.highlight_hue = { std::fmod(hsl.x + 0.5, 1.0), 0.01 };
 691         genome.highlight_saturation = { 1.0 - hsl.y, 0.01 };
 692         genome.highlight_lightness = { 1.0 - hsl.z, 0.01 };
 693
 694         genome.Configure(c);
 695 }
 696
 697 void Genome::Configure(Creature &c) const {
 698         c.GetGenome() = *this;
 699
 700         math::GaloisLFSR &random = c.GetSimulation().Assets().random;
 701
 702         c.GetProperties() = Instantiate(properties, random);
 703
 704         // TODO: derive stats from properties
 705         c.GetStats().Damage().gain = (-1.0 / 100.0);
 706         c.GetStats().Breath().gain = (1.0 / 5.0);
 707         c.GetStats().Thirst().gain = (1.0 / 60.0);
 708         c.GetStats().Hunger().gain = (1.0 / 200.0);
 709         c.GetStats().Exhaustion().gain = (-1.0 / 100.0);
 710         c.GetStats().Fatigue().gain = (-1.0 / 100.0);
 711         c.GetStats().Boredom().gain = (1.0 / 300.0);
 712
 713         glm::dvec3 base_color(
 714                 std::fmod(base_hue.FakeNormal(random.SNorm()) + 1.0, 1.0),
 715                 glm::clamp(base_saturation.FakeNormal(random.SNorm()), 0.0, 1.0),
 716                 glm::clamp(base_lightness.FakeNormal(random.SNorm()), 0.0, 1.0)
 717         );
 718         glm::dvec3 highlight_color(
 719                 std::fmod(highlight_hue.FakeNormal(random.SNorm()) + 1.0, 1.0),
 720                 glm::clamp(highlight_saturation.FakeNormal(random.SNorm()), 0.0, 1.0),
 721                 glm::clamp(highlight_lightness.FakeNormal(random.SNorm()), 0.0, 1.0)
 722         );
 723         c.BaseColor(hsl2rgb(base_color));
 724         c.HighlightColor(hsl2rgb(highlight_color));
 725         c.SetBackgroundTask(std::unique_ptr<Goal>(new BlobBackgroundTask(c)));
 726         c.AddGoal(std::unique_ptr<Goal>(new IdleGoal(c)));
 727 }
 728
 729
 730 void Split(Creature &c) {
 731         Creature *a = new Creature(c.GetSimulation());
 732         const Situation &s = c.GetSituation();
 733         a->AddParent(c);
 734         a->Name(c.GetSimulation().Assets().name.Sequential());
 735         c.GetGenome().Configure(*a);
 736         for (const auto &cmp : c.GetComposition()) {
 737                 a->AddMass(cmp.resource, cmp.value * 0.5);
 738         }
 739         s.GetPlanet().AddCreature(a);
 740         // TODO: duplicate situation somehow
 741         a->GetSituation().SetPlanetSurface(
 742                 s.GetPlanet(),
 743                 s.Position() + glm::dvec3(0.0, 0.55 * a->Size(), 0.0));
 744         a->BuildVAO();
 745         c.GetSimulation().Log() << a->Name() << " was born" << std::endl;
 746
 747         Creature *b = new Creature(c.GetSimulation());
 748         b->AddParent(c);
 749         b->Name(c.GetSimulation().Assets().name.Sequential());
 750         c.GetGenome().Configure(*b);
 751         for (const auto &cmp : c.GetComposition()) {
 752                 b->AddMass(cmp.resource, cmp.value * 0.5);
 753         }
 754         s.GetPlanet().AddCreature(b);
 755         b->GetSituation().SetPlanetSurface(
 756                 s.GetPlanet(),
 757                 s.Position() - glm::dvec3(0.0, 0.55 * b->Size(), 0.0));
 758         b->BuildVAO();
 759         c.GetSimulation().Log() << b->Name() << " was born" << std::endl;
 760
 761         c.Die();
 762 }
 763
 764
 765 Memory::Memory(Creature &c)
 766 : c(c) {
 767 }
 768
 769 Memory::~Memory() {
 770 }
 771
 772 void Memory::Erase() {
 773         known_types.clear();
 774 }
 775
 776 void Memory::Tick(double dt) {
 777         Situation &s = c.GetSituation();
 778         if (s.OnSurface()) {
 779                 TrackStay({ &s.GetPlanet(), s.Position() }, dt);
 780         }
 781 }
 782
 783 void Memory::TrackStay(const Location &l, double t) {
 784         const world::TileType &type = l.planet->TileTypeAt(l.position);
 785         auto entry = known_types.find(type.id);
 786         if (entry != known_types.end()) {
 787                 if (c.GetSimulation().Time() - entry->second.last_been > c.GetProperties().Lifetime() * 0.1) {
 788                         // "it's been ages"
 789                         if (entry->second.time_spent > c.Age() * 0.25) {
 790                                 // the place is very familiar
 791                                 c.GetStats().Boredom().Add(-0.2);
 792                         } else {
 793                                 // infrequent stays
 794                                 c.GetStats().Boredom().Add(-0.1);
 795                         }
 796                 }
 797                 entry->second.last_been = c.GetSimulation().Time();
 798                 entry->second.last_loc = l;
 799                 entry->second.time_spent += t;
 800         } else {
 801                 known_types.emplace(type.id, Stay{
 802                         c.GetSimulation().Time(),
 803                         l,
 804                         c.GetSimulation().Time(),
 805                         l,
 806                         t
 807                 });
 808                 // completely new place, interesting
 809                 // TODO: scale by personality trait
 810                 c.GetStats().Boredom().Add(-0.25);
 811         }
 812 }
 813
 814
 815 NameGenerator::NameGenerator()
 816 : counter(0) {
 817 }
 818
 819 NameGenerator::~NameGenerator() {
 820 }
 821
 822 std::string NameGenerator::Sequential() {
 823         std::stringstream ss;
 824         ss << "Blob " << ++counter;
 825         return ss.str();
 826 }
 827
 828
 829 Situation::Situation()
 830 : planet(nullptr)
 831 , state(glm::dvec3(0.0), glm::dvec3(0.0))
 832 , type(LOST) {
 833 }
 834
 835 Situation::~Situation() {
 836 }
 837
 838 bool Situation::OnPlanet() const noexcept {
 839         return type == PLANET_SURFACE;
 840 }
 841
 842 bool Situation::OnSurface() const noexcept {
 843         return type == PLANET_SURFACE;
 844 }
 845
 846 world::Tile &Situation::GetTile() const noexcept {
 847         return planet->TileAt(state.pos);
 848 }
 849
 850 const world::TileType &Situation::GetTileType() const noexcept {
 851         return planet->TileTypeAt(state.pos);
 852 }
 853
 854 void Situation::Move(const glm::dvec3 &dp) noexcept {
 855         state.pos += dp;
 856         EnforceConstraints(state);
 857 }
 858
 859 void Situation::Accelerate(const glm::dvec3 &dv) noexcept {
 860         state.vel += dv;
 861         EnforceConstraints(state);
 862 }
 863
 864 void Situation::EnforceConstraints(State &s) noexcept {
 865         if (OnSurface()) {
 866                 double r = GetPlanet().Radius();
 867                 if (length2(s.pos) < r * r) {
 868                         s.pos = normalize(s.pos) * r;
 869                 }
 870         }
 871 }
 872
 873 void Situation::SetPlanetSurface(world::Planet &p, const glm::dvec3 &pos) noexcept {
 874         type = PLANET_SURFACE;
 875         planet = &p;
 876         state.pos = pos;
 877         EnforceConstraints(state);
 878 }
 879
 880
 881 Steering::Steering(const Creature &c)
 882 : c(c)
 883 , target(0.0)
 884 , haste(0.0)
 885 , max_force(1.0)
 886 , max_speed(1.0)
 887 , min_dist(0.0)
 888 , max_look(0.0)
 889 , separating(false)
 890 , halting(true)
 891 , seeking(false)
 892 , arriving(false) {
 893 }
 894
 895 Steering::~Steering() {
 896 }
 897
 898 void Steering::Off() noexcept {
 899         separating = false;
 900         halting = false;
 901         seeking = false;
 902         arriving = false;
 903 }
 904
 905 void Steering::Separate(double min_distance, double max_lookaround) noexcept {
 906         separating = true;
 907         min_dist = min_distance;
 908         max_look = max_lookaround;
 909 }
 910
 911 void Steering::DontSeparate() noexcept {
 912         separating = false;
 913 }
 914
 915 void Steering::ResumeSeparate() noexcept {
 916         separating = true;
 917 }
 918
 919 void Steering::Halt() noexcept {
 920         halting = true;
 921         seeking = false;
 922         arriving = false;
 923 }
 924
 925 void Steering::Pass(const glm::dvec3 &t) noexcept {
 926         target = t;
 927         halting = false;
 928         seeking = true;
 929         arriving = false;
 930 }
 931
 932 void Steering::GoTo(const glm::dvec3 &t) noexcept {
 933         target = t;
 934         halting = false;
 935         seeking = false;
 936         arriving = true;
 937 }
 938
 939 glm::dvec3 Steering::Force(const Situation::State &s) const noexcept {
 940         double speed = max_speed * glm::clamp(max_speed * haste * haste, 0.25, 1.0);
 941         double force = max_speed * glm::clamp(max_force * haste * haste, 0.5, 1.0);
 942         glm::dvec3 result(0.0);
 943         if (separating) {
 944                 // TODO: off surface situation
 945                 glm::dvec3 repulse(0.0);
 946                 const Situation &s = c.GetSituation();
 947                 for (auto &other : s.GetPlanet().Creatures()) {
 948                         if (&*other == &c) continue;
 949                         glm::dvec3 diff = s.Position() - other->GetSituation().Position();
 950                         if (length2(diff) > max_look * max_look) continue;
 951                         if (!c.PerceptionTest(other->GetSituation().Position())) continue;
 952                         double sep = glm::clamp(length(diff) - other->Size() * 0.707 - c.Size() * 0.707, 0.0, min_dist);
 953                         repulse += normalize(diff) * (1.0 - sep / min_dist) * force;
 954                 }
 955                 result += repulse;
 956         }
 957         if (halting) {
 958                 // break twice as hard
 959                 result += -2.0 * s.vel * force;
 960         }
 961         if (seeking) {
 962                 glm::dvec3 diff = target - s.pos;
 963                 if (!allzero(diff)) {
 964                         result += TargetVelocity(s, (normalize(diff) * speed), force);
 965                 }
 966         }
 967         if (arriving) {
 968                 glm::dvec3 diff = target - s.pos;
 969                 double dist = length(diff);
 970                 if (!allzero(diff) && dist > std::numeric_limits<double>::epsilon()) {
 971                         result += TargetVelocity(s, diff * std::min(dist * force, speed) / dist, force);
 972                 }
 973         }
 974         if (length2(result) > max_force * max_force) {
 975                 result = normalize(result) * max_force;
 976         }
 977         return result;
 978 }
 979
 980 glm::dvec3 Steering::TargetVelocity(const Situation::State &s, const glm::dvec3 &vel, double acc) const noexcept {
 981         return (vel - s.vel) * acc;
 982 }
 983
 984 }
 985 }