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());
 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 }
 208
 209 void Creature::Hurt(double amount) noexcept {
 210         stats.Damage().Add(amount);
 211         if (stats.Damage().Full()) {
 212                 std::ostream &log = sim.Log() << name << " ";
 213                 if (stats.Exhaustion().Full()) {
 214                         log << "died of exhaustion";
 215                 } else if (stats.Breath().Full()) {
 216                         log << "suffocated";
 217                 } else if (stats.Thirst().Full()) {
 218                         log << "died of thirst";
 219                 } else if (stats.Hunger().Full()) {
 220                         log << "starved to death";
 221                 } else {
 222                         log << "succumed to wounds";
 223                 }
 224                 log << " at an age of " << ui::TimeString(Age())
 225                         << " (" << ui::PercentageString(Age() / properties.Lifetime())
 226                         << " of life expectancy of " << ui::TimeString(properties.Lifetime())
 227                         << ")" << std::endl;
 228                 Die();
 229         }
 230 }
 231
 232 void Creature::Die() noexcept {
 233         if (Dead()) return;
 234
 235         sim.SetDead(this);
 236         death = sim.Time();
 237         steering.Off();
 238         if (on_death) {
 239                 on_death(*this);
 240         }
 241         Remove();
 242 }
 243
 244 bool Creature::Dead() const noexcept {
 245         return death > birth;
 246 }
 247
 248 void Creature::Remove() noexcept {
 249         removable = true;
 250 }
 251
 252 void Creature::Removed() noexcept {
 253         bg_task.reset();
 254         goals.clear();
 255         memory.Erase();
 256         KillVAO();
 257 }
 258
 259 void Creature::AddParent(Creature &p) {
 260         parents.push_back(&p);
 261 }
 262
 263 double Creature::Age() const noexcept {
 264         return sim.Time() - birth;
 265 }
 266
 267 double Creature::AgeFactor(double peak) const noexcept {
 268         // shifted inverse hermite, y = 1 - (3t² - 2t³) with t = normalized age - peak
 269         // goes negative below -0.5 and starts to rise again above 1.0
 270         double t = glm::clamp((Age() / properties.Lifetime()) - peak, -0.5, 1.0);
 271         // guarantee at least 1%
 272         return std::max(0.01, 1.0 - (3.0 * t * t) + (2.0 * t * t * t));
 273 }
 274
 275 double Creature::EnergyEfficiency() const noexcept {
 276         return 0.25 * AgeFactor(0.05);
 277 }
 278
 279 double Creature::ExhaustionFactor() const noexcept {
 280         return 1.0 - (glm::smoothstep(0.5, 1.0, stats.Exhaustion().value) * 0.5);
 281 }
 282
 283 double Creature::FatigueFactor() const noexcept {
 284         return 1.0 - (glm::smoothstep(0.5, 1.0, stats.Fatigue().value) * 0.5);
 285 }
 286
 287 double Creature::Strength() const noexcept {
 288         // TODO: replace all age factors with actual growth and decay
 289         return properties.Strength() * ExhaustionFactor() * AgeFactor(0.25);
 290 }
 291
 292 double Creature::Stamina() const noexcept {
 293         return properties.Stamina() * ExhaustionFactor() * AgeFactor(0.25);
 294 }
 295
 296 double Creature::Dexerty() const noexcept {
 297         return properties.Dexerty() * ExhaustionFactor() * AgeFactor(0.25);
 298 }
 299
 300 double Creature::Intelligence() const noexcept {
 301         return properties.Intelligence() * FatigueFactor() * AgeFactor(0.25);
 302 }
 303
 304 double Creature::Lifetime() const noexcept {
 305         return properties.Lifetime();
 306 }
 307
 308 double Creature::Fertility() const noexcept {
 309         return properties.Fertility() * AgeFactor(0.25);
 310 }
 311
 312 double Creature::Mutability() const noexcept {
 313         return properties.Mutability();
 314 }
 315
 316 double Creature::Adaptability() const noexcept {
 317         return properties.Adaptability();
 318 }
 319
 320 double Creature::OffspringMass() const noexcept {
 321         return properties.OffspringMass();
 322 }
 323
 324 double Creature::PerceptionRange() const noexcept {
 325         return 3.0 * (Dexerty() / (Dexerty() + 1)) + Size();
 326 }
 327
 328 double Creature::PerceptionOmniRange() const noexcept {
 329         return 0.5 * (Dexerty() / (Dexerty() + 1)) + Size();
 330 }
 331
 332 double Creature::PerceptionField() const noexcept {
 333         // this is the cosine of half the angle, so 1.0 is none, -1.0 is perfect
 334         return 0.8 - (Dexerty() / (Dexerty() + 1));
 335 }
 336
 337 bool Creature::PerceptionTest(const glm::dvec3 &p) const noexcept {
 338         const glm::dvec3 diff(p - situation.Position());
 339         double omni_range = PerceptionOmniRange();
 340         if (length2(diff) < omni_range * omni_range) return true;
 341         double range = PerceptionRange();
 342         if (length2(diff) > range * range) return false;
 343         return dot(normalize(diff), situation.Heading()) > PerceptionField();
 344 }
 345
 346 double Creature::OffspringChance() const noexcept {
 347         return AgeFactor(0.25) * properties.Fertility() * (1.0 / 3600.0);
 348 }
 349
 350 double Creature::MutateChance() const noexcept {
 351         return GetProperties().Mutability() * (1.0 / 3600.0);
 352 }
 353
 354 double Creature::AdaptChance() const noexcept {
 355         return GetProperties().Adaptability() * (1.0 / 120.0);
 356 }
 357
 358 void Creature::AddGoal(std::unique_ptr<Goal> &&g) {
 359         g->Enable();
 360         goals.emplace_back(std::move(g));
 361 }
 362
 363 namespace {
 364
 365 bool GoalCompare(const std::unique_ptr<Goal> &a, const std::unique_ptr<Goal> &b) {
 366         return b->Urgency() < a->Urgency();
 367 }
 368
 369 }
 370
 371 void Creature::Tick(double dt) {
 372         TickState(dt);
 373         TickStats(dt);
 374         TickBrain(dt);
 375 }
 376
 377 void Creature::TickState(double dt) {
 378         steering.MaxSpeed(Dexerty());
 379         steering.MaxForce(Strength());
 380         Situation::State state(situation.GetState());
 381         Situation::Derivative a(Step(Situation::Derivative(), 0.0));
 382         Situation::Derivative b(Step(a, dt * 0.5));
 383         Situation::Derivative c(Step(b, dt * 0.5));
 384         Situation::Derivative d(Step(c, dt));
 385         Situation::Derivative f(
 386                 (1.0 / 6.0) * (a.vel + 2.0 * (b.vel + c.vel) + d.vel),
 387                 (1.0 / 6.0) * (a.acc + 2.0 * (b.acc + c.acc) + d.acc)
 388         );
 389         state.pos += f.vel * dt;
 390         state.vel += f.acc * dt;
 391         situation.EnforceConstraints(state);
 392         if (length2(state.vel) > 0.000001) {
 393                 glm::dvec3 nvel(normalize(state.vel));
 394                 double ang = angle(nvel, state.dir);
 395                 double turn_rate = PI * 0.75 * dt;
 396                 if (ang < turn_rate) {
 397                         state.dir = normalize(state.vel);
 398                 } else if (std::abs(ang - PI) < 0.001) {
 399                         state.dir = rotate(state.dir, turn_rate, world::Planet::SurfaceNormal(situation.Surface()));
 400                 } else {
 401                         state.dir = rotate(state.dir, turn_rate, normalize(cross(state.dir, nvel)));
 402                 }
 403         }
 404         situation.SetState(state);
 405         // work is force times distance
 406         DoWork(length(f.acc) * Mass() * length(f.vel) * dt);
 407 }
 408
 409 Situation::Derivative Creature::Step(const Situation::Derivative &ds, double dt) const noexcept {
 410         Situation::State s = situation.GetState();
 411         s.pos += ds.vel * dt;
 412         s.vel += ds.acc * dt;
 413         glm::dvec3 force(steering.Force(s));
 414         // gravity = antinormal * mass * Gm / r²
 415         double elevation = s.pos[(situation.Surface() + 2) % 3];
 416         glm::dvec3 normal(world::Planet::SurfaceNormal(situation.Surface()));
 417         force += glm::dvec3(
 418                 -normal
 419                 * Mass() * situation.GetPlanet().GravitationalParameter()
 420                 / (elevation * elevation));
 421         // if net force is applied and in contact with surface
 422         if (!allzero(force) && std::abs(std::abs(elevation) - situation.GetPlanet().Radius()) < 0.001) {
 423                 // apply friction = -|normal force| * tangential force * coefficient
 424                 glm::dvec3 fn(normal * dot(force, normal));
 425                 glm::dvec3 ft(force - fn);
 426                 double u = 0.4;
 427                 glm::dvec3 friction(-length(fn) * ft * u);
 428                 force += friction;
 429         }
 430         return {
 431                 s.vel,
 432                 force / Mass()
 433         };
 434 }
 435
 436 void Creature::TickStats(double dt) {
 437         for (auto &s : stats.stat) {
 438                 s.Add(s.gain * dt);
 439         }
 440         // TODO: damage values depending on properties
 441         if (stats.Breath().Full()) {
 442                 constexpr double dps = 1.0 / 4.0;
 443                 Hurt(dps * dt);
 444         }
 445         if (stats.Thirst().Full()) {
 446                 constexpr double dps = 1.0 / 32.0;
 447                 Hurt(dps * dt);
 448         }
 449         if (stats.Hunger().Full()) {
 450                 constexpr double dps = 1.0 / 128.0;
 451                 Hurt(dps * dt);
 452         }
 453         if (!situation.Moving()) {
 454                 // double exhaustion recovery when standing still
 455                 stats.Exhaustion().Add(stats.Exhaustion().gain * dt);
 456         }
 457 }
 458
 459 void Creature::TickBrain(double dt) {
 460         bg_task->Tick(dt);
 461         bg_task->Action();
 462         memory.Tick(dt);
 463         // do background stuff
 464         if (goals.empty()) {
 465                 return;
 466         }
 467         for (auto &goal : goals) {
 468                 goal->Tick(dt);
 469         }
 470         // if active goal can be interrupted, check priorities
 471         if (goals.size() > 1 && goals[0]->Interruptible()) {
 472                 std::sort(goals.begin(), goals.end(), GoalCompare);
 473         }
 474         goals[0]->Action();
 475         for (auto goal = goals.begin(); goal != goals.end();) {
 476                 if ((*goal)->Complete()) {
 477                         goals.erase(goal);
 478                 } else {
 479                         ++goal;
 480                 }
 481         }
 482 }
 483
 484 math::AABB Creature::CollisionBox() const noexcept {
 485         return { glm::dvec3(size * -0.5), glm::dvec3(size * 0.5) };
 486 }
 487
 488 glm::dmat4 Creature::CollisionTransform() const noexcept {
 489         const double half_size = size * 0.5;
 490         const glm::dvec3 &pos = situation.Position();
 491         const glm::dmat3 srf(world::Planet::SurfaceOrientation(situation.Surface()));
 492         return glm::translate(glm::dvec3(pos.x, pos.y, pos.z + half_size))
 493                 * glm::rotate(glm::orientedAngle(-srf[2], situation.Heading(), srf[1]), srf[1])
 494                 * glm::dmat4(srf);
 495 }
 496
 497 glm::dmat4 Creature::LocalTransform() noexcept {
 498         const double half_size = size * 0.5;
 499         return CollisionTransform()
 500                 * glm::scale(glm::dvec3(half_size, half_size, half_size));
 501 }
 502
 503 void Creature::BuildVAO() {
 504         vao.reset(new graphics::SimpleVAO<Attributes, unsigned short>);
 505         vao->Bind();
 506         vao->BindAttributes();
 507         vao->EnableAttribute(0);
 508         vao->EnableAttribute(1);
 509         vao->EnableAttribute(2);
 510         vao->AttributePointer<glm::vec3>(0, false, offsetof(Attributes, position));
 511         vao->AttributePointer<glm::vec3>(1, false, offsetof(Attributes, normal));
 512         vao->AttributePointer<glm::vec3>(2, false, offsetof(Attributes, texture));
 513         vao->ReserveAttributes(6 * 4, GL_STATIC_DRAW);
 514         {
 515                 auto attrib = vao->MapAttributes(GL_WRITE_ONLY);
 516                 const float offset = 1.0f;
 517                 for (int surface = 0; surface < 6; ++surface) {
 518                         const float tex_u_begin = surface < 3 ? 1.0f : 0.0f;
 519                         const float tex_u_end = surface < 3 ? 0.0f : 1.0f;
 520
 521                         attrib[4 * surface + 0].position[(surface + 0) % 3] = -offset;
 522                         attrib[4 * surface + 0].position[(surface + 1) % 3] = -offset;
 523                         attrib[4 * surface + 0].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 524                         attrib[4 * surface + 0].normal[(surface + 0) % 3] = 0.0f;
 525                         attrib[4 * surface + 0].normal[(surface + 1) % 3] = 0.0f;
 526                         attrib[4 * surface + 0].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 527                         attrib[4 * surface + 0].texture.x = tex_u_begin;
 528                         attrib[4 * surface + 0].texture.y = 1.0f;
 529                         attrib[4 * surface + 0].texture.z = surface;
 530
 531                         attrib[4 * surface + 1].position[(surface + 0) % 3] = -offset;
 532                         attrib[4 * surface + 1].position[(surface + 1) % 3] =  offset;
 533                         attrib[4 * surface + 1].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 534                         attrib[4 * surface + 1].normal[(surface + 0) % 3] = 0.0f;
 535                         attrib[4 * surface + 1].normal[(surface + 1) % 3] = 0.0f;
 536                         attrib[4 * surface + 1].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 537                         attrib[4 * surface + 1].texture.x = tex_u_end;
 538                         attrib[4 * surface + 1].texture.y = 1.0f;
 539                         attrib[4 * surface + 1].texture.z = surface;
 540
 541                         attrib[4 * surface + 2].position[(surface + 0) % 3] =  offset;
 542                         attrib[4 * surface + 2].position[(surface + 1) % 3] = -offset;
 543                         attrib[4 * surface + 2].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 544                         attrib[4 * surface + 2].normal[(surface + 0) % 3] = 0.0f;
 545                         attrib[4 * surface + 2].normal[(surface + 1) % 3] = 0.0f;
 546                         attrib[4 * surface + 2].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 547                         attrib[4 * surface + 2].texture.x = tex_u_begin;
 548                         attrib[4 * surface + 2].texture.y = 0.0f;
 549                         attrib[4 * surface + 2].texture.z = surface;
 550
 551                         attrib[4 * surface + 3].position[(surface + 0) % 3] = offset;
 552                         attrib[4 * surface + 3].position[(surface + 1) % 3] = offset;
 553                         attrib[4 * surface + 3].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 554                         attrib[4 * surface + 3].normal[(surface + 0) % 3] = 0.0f;
 555                         attrib[4 * surface + 3].normal[(surface + 1) % 3] = 0.0f;
 556                         attrib[4 * surface + 3].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 557                         attrib[4 * surface + 3].texture.x = tex_u_end;
 558                         attrib[4 * surface + 3].texture.y = 0.0f;
 559                         attrib[4 * surface + 3].texture.z = surface;
 560                 }
 561         }
 562         vao->BindElements();
 563         vao->ReserveElements(6 * 6, GL_STATIC_DRAW);
 564         {
 565                 auto element = vao->MapElements(GL_WRITE_ONLY);
 566                 for (int surface = 0; surface < 3; ++surface) {
 567                         element[6 * surface + 0] = 4 * surface + 0;
 568                         element[6 * surface + 1] = 4 * surface + 2;
 569                         element[6 * surface + 2] = 4 * surface + 1;
 570                         element[6 * surface + 3] = 4 * surface + 1;
 571                         element[6 * surface + 4] = 4 * surface + 2;
 572                         element[6 * surface + 5] = 4 * surface + 3;
 573                 }
 574                 for (int surface = 3; surface < 6; ++surface) {
 575                         element[6 * surface + 0] = 4 * surface + 0;
 576                         element[6 * surface + 1] = 4 * surface + 1;
 577                         element[6 * surface + 2] = 4 * surface + 2;
 578                         element[6 * surface + 3] = 4 * surface + 2;
 579                         element[6 * surface + 4] = 4 * surface + 1;
 580                         element[6 * surface + 5] = 4 * surface + 3;
 581                 }
 582         }
 583         vao->Unbind();
 584 }
 585
 586 void Creature::KillVAO() {
 587         vao.reset();
 588 }
 589
 590 void Creature::Draw(graphics::Viewport &viewport) {
 591         if (!vao) return;
 592         vao->Bind();
 593         vao->DrawTriangles(6 * 6);
 594 }
 595
 596
 597 void Spawn(Creature &c, world::Planet &p) {
 598         p.AddCreature(&c);
 599         c.GetSituation().SetPlanetSurface(p, 0, p.TileCenter(0, p.SideLength() / 2, p.SideLength() / 2));
 600         c.GetSituation().Heading(-world::Planet::SurfaceOrientation(0)[2]);
 601
 602         // probe surrounding area for common resources
 603         int start = p.SideLength() / 2 - 2;
 604         int end = start + 5;
 605         std::map<int, double> yields;
 606         for (int y = start; y < end; ++y) {
 607                 for (int x = start; x < end; ++x) {
 608                         const world::TileType &t = p.TypeAt(0, x, y);
 609                         for (auto yield : t.resources) {
 610                                 yields[yield.resource] += yield.ubiquity;
 611                         }
 612                 }
 613         }
 614         int liquid = -1;
 615         int solid = -1;
 616         for (auto e : yields) {
 617                 if (c.GetSimulation().Resources()[e.first].state == world::Resource::LIQUID) {
 618                         if (liquid < 0 || e.second > yields[liquid]) {
 619                                 liquid = e.first;
 620                         }
 621                 } else if (c.GetSimulation().Resources()[e.first].state == world::Resource::SOLID) {
 622                         if (solid < 0 || e.second > yields[solid]) {
 623                                 solid = e.first;
 624                         }
 625                 }
 626         }
 627
 628         Genome genome;
 629         genome.properties.Strength() = { 2.0, 0.1 };
 630         genome.properties.Stamina() = { 2.0, 0.1 };
 631         genome.properties.Dexerty() = { 2.0, 0.1 };
 632         genome.properties.Intelligence() = { 1.0, 0.1 };
 633         genome.properties.Lifetime() = { 480.0, 60.0 };
 634         genome.properties.Fertility() = { 0.5, 0.03 };
 635         genome.properties.Mutability() = { 0.9, 0.1 };
 636         genome.properties.Adaptability() = { 0.9, 0.1 };
 637         genome.properties.OffspringMass() = { 0.3, 0.02 };
 638
 639         glm::dvec3 color_avg(0.0);
 640         double color_divisor = 0.0;
 641
 642         if (p.HasAtmosphere()) {
 643                 c.AddMass(p.Atmosphere(), 0.01);
 644                 color_avg += c.GetSimulation().Resources()[p.Atmosphere()].base_color * 0.1;
 645                 color_divisor += 0.1;
 646         }
 647         if (liquid > -1) {
 648                 c.AddMass(liquid, 0.3);
 649                 color_avg += c.GetSimulation().Resources()[liquid].base_color * 0.5;
 650                 color_divisor += 0.5;
 651         }
 652         if (solid > -1) {
 653                 c.AddMass(solid, 0.1);
 654                 color_avg += c.GetSimulation().Resources()[solid].base_color;
 655                 color_divisor += 1.0;
 656         }
 657
 658         if (color_divisor > 0.001) {
 659                 color_avg /= color_divisor;
 660         }
 661         glm::dvec3 hsl = rgb2hsl(color_avg);
 662         genome.base_hue = { hsl.x, 0.01 };
 663         genome.base_saturation = { hsl.y, 0.01 };
 664         genome.base_lightness = { hsl.z, 0.01 };
 665         // use opposite color as start highlight
 666         genome.highlight_hue = { std::fmod(hsl.x + 0.5, 1.0), 0.01 };
 667         genome.highlight_saturation = { 1.0 - hsl.y, 0.01 };
 668         genome.highlight_lightness = { 1.0 - hsl.z, 0.01 };
 669
 670         genome.Configure(c);
 671 }
 672
 673 void Genome::Configure(Creature &c) const {
 674         c.GetGenome() = *this;
 675
 676         math::GaloisLFSR &random = c.GetSimulation().Assets().random;
 677
 678         c.GetProperties() = Instantiate(properties, random);
 679
 680         // TODO: derive stats from properties
 681         c.GetStats().Damage().gain = (-1.0 / 100.0);
 682         c.GetStats().Breath().gain = (1.0 / 5.0);
 683         c.GetStats().Thirst().gain = (1.0 / 60.0);
 684         c.GetStats().Hunger().gain = (1.0 / 200.0);
 685         c.GetStats().Exhaustion().gain = (-1.0 / 100.0);
 686         c.GetStats().Fatigue().gain = (-1.0 / 100.0);
 687         c.GetStats().Boredom().gain = (1.0 / 300.0);
 688
 689         glm::dvec3 base_color(
 690                 std::fmod(base_hue.FakeNormal(random.SNorm()) + 1.0, 1.0),
 691                 glm::clamp(base_saturation.FakeNormal(random.SNorm()), 0.0, 1.0),
 692                 glm::clamp(base_lightness.FakeNormal(random.SNorm()), 0.0, 1.0)
 693         );
 694         glm::dvec3 highlight_color(
 695                 std::fmod(highlight_hue.FakeNormal(random.SNorm()) + 1.0, 1.0),
 696                 glm::clamp(highlight_saturation.FakeNormal(random.SNorm()), 0.0, 1.0),
 697                 glm::clamp(highlight_lightness.FakeNormal(random.SNorm()), 0.0, 1.0)
 698         );
 699         c.BaseColor(hsl2rgb(base_color));
 700         c.HighlightColor(hsl2rgb(highlight_color));
 701         c.SetBackgroundTask(std::unique_ptr<Goal>(new BlobBackgroundTask(c)));
 702         c.AddGoal(std::unique_ptr<Goal>(new IdleGoal(c)));
 703 }
 704
 705
 706 void Split(Creature &c) {
 707         Creature *a = new Creature(c.GetSimulation());
 708         const Situation &s = c.GetSituation();
 709         a->AddParent(c);
 710         a->Name(c.GetSimulation().Assets().name.Sequential());
 711         c.GetGenome().Configure(*a);
 712         for (const auto &cmp : c.GetComposition()) {
 713                 a->AddMass(cmp.resource, cmp.value * 0.5);
 714         }
 715         s.GetPlanet().AddCreature(a);
 716         // TODO: duplicate situation somehow
 717         a->GetSituation().SetPlanetSurface(
 718                 s.GetPlanet(), s.Surface(),
 719                 s.Position() + glm::dvec3(0.0, 0.55 * a->Size(), 0.0));
 720         a->BuildVAO();
 721         c.GetSimulation().Log() << a->Name() << " was born" << std::endl;
 722
 723         Creature *b = new Creature(c.GetSimulation());
 724         b->AddParent(c);
 725         b->Name(c.GetSimulation().Assets().name.Sequential());
 726         c.GetGenome().Configure(*b);
 727         for (const auto &cmp : c.GetComposition()) {
 728                 b->AddMass(cmp.resource, cmp.value * 0.5);
 729         }
 730         s.GetPlanet().AddCreature(b);
 731         b->GetSituation().SetPlanetSurface(
 732                 s.GetPlanet(), s.Surface(),
 733                 s.Position() - glm::dvec3(0.0, 0.55 * b->Size(), 0.0));
 734         b->BuildVAO();
 735         c.GetSimulation().Log() << b->Name() << " was born" << std::endl;
 736
 737         c.Die();
 738 }
 739
 740
 741 Memory::Memory(Creature &c)
 742 : c(c) {
 743 }
 744
 745 Memory::~Memory() {
 746 }
 747
 748 void Memory::Erase() {
 749         known_types.clear();
 750 }
 751
 752 void Memory::Tick(double dt) {
 753         Situation &s = c.GetSituation();
 754         if (s.OnTile()) {
 755                 TrackStay({ &s.GetPlanet(), s.Surface(), s.SurfacePosition() }, dt);
 756         }
 757 }
 758
 759 void Memory::TrackStay(const Location &l, double t) {
 760         const world::TileType &type = l.planet->TypeAt(l.surface, l.coords.x, l.coords.y);
 761         auto entry = known_types.find(type.id);
 762         if (entry != known_types.end()) {
 763                 if (c.GetSimulation().Time() - entry->second.last_been > c.GetProperties().Lifetime() * 0.1) {
 764                         // "it's been ages"
 765                         if (entry->second.time_spent > c.Age() * 0.25) {
 766                                 // the place is very familiar
 767                                 c.GetStats().Boredom().Add(-0.2);
 768                         } else {
 769                                 // infrequent stays
 770                                 c.GetStats().Boredom().Add(-0.1);
 771                         }
 772                 }
 773                 entry->second.last_been = c.GetSimulation().Time();
 774                 entry->second.last_loc = l;
 775                 entry->second.time_spent += t;
 776         } else {
 777                 known_types.emplace(type.id, Stay{
 778                         c.GetSimulation().Time(),
 779                         l,
 780                         c.GetSimulation().Time(),
 781                         l,
 782                         t
 783                 });
 784                 // completely new place, interesting
 785                 // TODO: scale by personality trait
 786                 c.GetStats().Boredom().Add(-0.25);
 787         }
 788 }
 789
 790
 791 NameGenerator::NameGenerator()
 792 : counter(0) {
 793 }
 794
 795 NameGenerator::~NameGenerator() {
 796 }
 797
 798 std::string NameGenerator::Sequential() {
 799         std::stringstream ss;
 800         ss << "Blob " << ++counter;
 801         return ss.str();
 802 }
 803
 804
 805 Situation::Situation()
 806 : planet(nullptr)
 807 , state(glm::dvec3(0.0), glm::dvec3(0.0))
 808 , surface(0)
 809 , type(LOST) {
 810 }
 811
 812 Situation::~Situation() {
 813 }
 814
 815 bool Situation::OnPlanet() const noexcept {
 816         return type == PLANET_SURFACE;
 817 }
 818
 819 bool Situation::OnSurface() const noexcept {
 820         return type == PLANET_SURFACE;
 821 }
 822
 823 bool Situation::OnTile() const noexcept {
 824         if (type != PLANET_SURFACE) return false;
 825         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
 826         return t.x >= 0 && t.x < planet->SideLength()
 827                 && t.y >= 0 && t.y < planet->SideLength();
 828 }
 829
 830 glm::ivec2 Situation::SurfacePosition() const noexcept {
 831         return planet->SurfacePosition(surface, state.pos);
 832 }
 833
 834 world::Tile &Situation::GetTile() const noexcept {
 835         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
 836         return planet->TileAt(surface, t.x, t.y);
 837 }
 838
 839 const world::TileType &Situation::GetTileType() const noexcept {
 840         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
 841         return planet->TypeAt(surface, t.x, t.y);
 842 }
 843
 844 void Situation::Move(const glm::dvec3 &dp) noexcept {
 845         state.pos += dp;
 846         EnforceConstraints(state);
 847 }
 848
 849 void Situation::Accelerate(const glm::dvec3 &dv) noexcept {
 850         state.vel += dv;
 851         EnforceConstraints(state);
 852 }
 853
 854 void Situation::EnforceConstraints(State &s) noexcept {
 855         if (OnSurface()) {
 856                 if (Surface() < 3) {
 857                         if (s.pos[(Surface() + 2) % 3] < GetPlanet().Radius()) {
 858                                 s.pos[(Surface() + 2) % 3] = GetPlanet().Radius();
 859                                 s.vel[(Surface() + 2) % 3] = std::max(0.0, s.vel[(Surface() + 2) % 3]);
 860                         }
 861                 } else {
 862                         if (s.pos[(Surface() + 2) % 3] > -GetPlanet().Radius()) {
 863                                 s.pos[(Surface() + 2) % 3] = -GetPlanet().Radius();
 864                                 s.vel[(Surface() + 2) % 3] = std::min(0.0, s.vel[(Surface() + 2) % 3]);
 865                         }
 866                 }
 867         }
 868 }
 869
 870 void Situation::SetPlanetSurface(world::Planet &p, int srf, const glm::dvec3 &pos) noexcept {
 871         type = PLANET_SURFACE;
 872         planet = &p;
 873         surface = srf;
 874         state.pos = pos;
 875         EnforceConstraints(state);
 876 }
 877
 878
 879 Steering::Steering(const Creature &c)
 880 : c(c)
 881 , target(0.0)
 882 , haste(0.0)
 883 , max_force(1.0)
 884 , max_speed(1.0)
 885 , min_dist(0.0)
 886 , max_look(0.0)
 887 , separating(false)
 888 , halting(true)
 889 , seeking(false)
 890 , arriving(false) {
 891 }
 892
 893 Steering::~Steering() {
 894 }
 895
 896 void Steering::Off() noexcept {
 897         separating = false;
 898         halting = false;
 899         seeking = false;
 900         arriving = false;
 901 }
 902
 903 void Steering::Separate(double min_distance, double max_lookaround) noexcept {
 904         separating = true;
 905         min_dist = min_distance;
 906         max_look = max_lookaround;
 907 }
 908
 909 void Steering::DontSeparate() noexcept {
 910         separating = false;
 911 }
 912
 913 void Steering::ResumeSeparate() noexcept {
 914         separating = true;
 915 }
 916
 917 void Steering::Halt() noexcept {
 918         halting = true;
 919         seeking = false;
 920         arriving = false;
 921 }
 922
 923 void Steering::Pass(const glm::dvec3 &t) noexcept {
 924         target = t;
 925         halting = false;
 926         seeking = true;
 927         arriving = false;
 928 }
 929
 930 void Steering::GoTo(const glm::dvec3 &t) noexcept {
 931         target = t;
 932         halting = false;
 933         seeking = false;
 934         arriving = true;
 935 }
 936
 937 glm::dvec3 Steering::Force(const Situation::State &s) const noexcept {
 938         double speed = max_speed * glm::clamp(max_speed * haste * haste, 0.25, 1.0);
 939         double force = max_speed * glm::clamp(max_force * haste * haste, 0.5, 1.0);
 940         glm::dvec3 result(0.0);
 941         if (separating) {
 942                 // TODO: off surface situation
 943                 glm::dvec3 repulse(0.0);
 944                 const Situation &s = c.GetSituation();
 945                 for (auto &other : s.GetPlanet().Creatures()) {
 946                         if (&*other == &c) continue;
 947                         glm::dvec3 diff = s.Position() - other->GetSituation().Position();
 948                         if (length2(diff) > max_look * max_look) continue;
 949                         if (!c.PerceptionTest(other->GetSituation().Position())) continue;
 950                         double sep = length(diff) - other->Size() * 0.707 - c.Size() * 0.707;
 951                         if (sep < min_dist) {
 952                                 repulse += normalize(diff) * (1.0 - sep / min_dist);
 953                         }
 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 }