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 "../world/Body.hpp"
  15 #include "../world/Planet.hpp"
  16 #include "../world/Simulation.hpp"
  17 #include "../world/TileType.hpp"
  18
  19 #include <algorithm>
  20 #include <sstream>
  21 #include <glm/gtx/transform.hpp>
  22 #include <glm/gtx/vector_angle.hpp>
  23
  24 #include <iostream>
  25 #include <glm/gtx/io.hpp>
  26
  27
  28 namespace blobs {
  29 namespace creature {
  30
  31 Composition::Composition()
  32 : components() {
  33 }
  34
  35 Composition::~Composition() {
  36 }
  37
  38 namespace {
  39 bool CompositionCompare(const Composition::Component &a, const Composition::Component &b) {
  40         return b.value < a.value;
  41 }
  42 }
  43
  44 void Composition::Add(int res, double amount) {
  45         bool found = false;
  46         for (auto &c : components) {
  47                 if (c.resource == res) {
  48                         c.value += amount;
  49                         found = true;
  50                         break;
  51                 }
  52         }
  53         if (!found) {
  54                 components.emplace_back(res, amount);
  55         }
  56         std::sort(components.begin(), components.end(), CompositionCompare);
  57 }
  58
  59 bool Composition::Has(int res) const noexcept {
  60         for (auto &c : components) {
  61                 if (c.resource == res) {
  62                         return true;
  63                 }
  64         }
  65         return false;
  66 }
  67
  68 double Composition::Get(int res) const noexcept {
  69         for (auto &c : components) {
  70                 if (c.resource == res) {
  71                         return c.value;
  72                 }
  73         }
  74         return 0.0;
  75 }
  76
  77
  78 Creature::Creature(world::Simulation &sim)
  79 : sim(sim)
  80 , name()
  81 , genome()
  82 , properties()
  83 , composition()
  84 , base_color(1.0)
  85 , highlight_color(0.0, 0.0, 0.0, 1.0)
  86 , mass(1.0)
  87 , size(1.0)
  88 , birth(sim.Time())
  89 , on_death()
  90 , removable(false)
  91 , stats()
  92 , memory(*this)
  93 , bg_task()
  94 , goals()
  95 , situation()
  96 , steering(*this)
  97 , vao() {
  98         // all creatures avoid each other for now
  99         steering.Separate(0.1, 1.5);
 100 }
 101
 102 Creature::~Creature() {
 103 }
 104
 105 void Creature::AddMass(int res, double amount) {
 106         composition.Add(res, amount);
 107         double mass = 0.0;
 108         double nonsolid = 0.0;
 109         double volume = 0.0;
 110         for (const auto &c : composition) {
 111                 mass += c.value;
 112                 volume += c.value / sim.Assets().data.resources[c.resource].density;
 113                 if (sim.Assets().data.resources[c.resource].state != world::Resource::SOLID) {
 114                         nonsolid += c.value;
 115                 }
 116         }
 117         Mass(mass);
 118         Size(std::cbrt(volume));
 119         highlight_color.a = nonsolid / mass;
 120 }
 121
 122 void Creature::HighlightColor(const glm::dvec3 &c) noexcept {
 123         highlight_color = glm::dvec4(c, highlight_color.a);
 124 }
 125
 126 void Creature::Ingest(int res, double amount) noexcept {
 127         // TODO: check foreign materials
 128         // 10% stays in body
 129         AddMass(res, amount * 0.1);
 130 }
 131
 132 void Creature::Hurt(double amount) noexcept {
 133         stats.Damage().Add(amount);
 134         if (stats.Damage().Full()) {
 135                 std::cout << "[" << int(sim.Time()) << "s] " << name << " ";
 136                 if (stats.Exhaustion().Full()) {
 137                         std::cout << "died of exhaustion";
 138                 } else if (stats.Breath().Full()) {
 139                         std::cout << "suffocated";
 140                 } else if (stats.Thirst().Full()) {
 141                         std::cout << "died of thirst";
 142                 } else if (stats.Hunger().Full()) {
 143                         std::cout << "starved to death";
 144                 } else {
 145                         std::cout << "succumed to wounds";
 146                 }
 147                 std::cout << " at an age of ";
 148                 {
 149                         int age = int(Age());
 150                         if (age >= 3600) {
 151                                 std::cout << (age / 3600) << "h ";
 152                                 age %= 3600;
 153                         }
 154                         if (age >= 60) {
 155                                 std::cout << (age / 60) << "m ";
 156                                 age %= 60;
 157                         }
 158                         std::cout << age << 's';
 159                 }
 160                 std::cout << " (" << int(Age() / properties.Lifetime() * 100)
 161                         << "% of life expectancy of ";
 162                 {
 163                         int lt = int(properties.Lifetime());
 164                         if (lt >= 3600) {
 165                                 std::cout << (lt / 3600) << "h ";
 166                                 lt %= 3600;
 167                         }
 168                         if (lt >= 60) {
 169                                 std::cout << (lt / 60) << "m ";
 170                                 lt %= 60;
 171                         }
 172                         std::cout << lt << 's';
 173                 }
 174                 std::cout << ")" << std::endl;
 175                 Die();
 176         }
 177 }
 178
 179 void Creature::Die() noexcept {
 180         goals.clear();
 181         steering.Halt();
 182         if (on_death) {
 183                 on_death(*this);
 184         }
 185         Remove();
 186 }
 187
 188 double Creature::Age() const noexcept {
 189         return sim.Time() - birth;
 190 }
 191
 192 double Creature::AgeFactor(double peak) const noexcept {
 193         // shifted inverse hermite, y = 1 - (3t² - 2t³) with t = normalized age - peak
 194         // goes negative below -0.5 and starts to rise again above 1.0
 195         double t = glm::clamp((Age() / properties.Lifetime()) - peak, -0.5, 1.0);
 196         return 1.0 - (3.0 * t * t) + (2.0 * t * t * t);
 197 }
 198
 199 double Creature::ExhaustionFactor() const noexcept {
 200         return 1.0 - (glm::smoothstep(0.5, 1.0, stats.Exhaustion().value) * 0.5);
 201 }
 202
 203 double Creature::FatigueFactor() const noexcept {
 204         return 1.0 - (glm::smoothstep(0.5, 1.0, stats.Fatigue().value) * 0.5);
 205 }
 206
 207 double Creature::Strength() const noexcept {
 208         // TODO: replace all age factors with actual growth and decay
 209         return properties.Strength() * ExhaustionFactor() * AgeFactor(0.25);
 210 }
 211
 212 double Creature::Stamina() const noexcept {
 213         return properties.Stamina() * ExhaustionFactor() * AgeFactor(0.25);
 214 }
 215
 216 double Creature::Dexerty() const noexcept {
 217         return properties.Dexerty() * ExhaustionFactor() * AgeFactor(0.25);
 218 }
 219
 220 double Creature::Intelligence() const noexcept {
 221         return properties.Intelligence() * FatigueFactor() * AgeFactor(0.25);
 222 }
 223
 224 double Creature::Lifetime() const noexcept {
 225         return properties.Lifetime();
 226 }
 227
 228 double Creature::Fertility() const noexcept {
 229         return properties.Fertility() * AgeFactor(0.25);
 230 }
 231
 232 double Creature::Mutability() const noexcept {
 233         return properties.Mutability();
 234 }
 235
 236 double Creature::OffspringMass() const noexcept {
 237         return properties.OffspringMass();
 238 }
 239
 240 double Creature::OffspringChance() const noexcept {
 241         return AgeFactor(0.25) * properties.Fertility() * (1.0 / 3600.0);
 242 }
 243
 244 double Creature::MutateChance() const noexcept {
 245         return GetProperties().Mutability() * (1.0 / 3600.0);
 246 }
 247
 248 void Creature::AddGoal(std::unique_ptr<Goal> &&g) {
 249         g->Enable();
 250         goals.emplace_back(std::move(g));
 251 }
 252
 253 namespace {
 254
 255 bool GoalCompare(const std::unique_ptr<Goal> &a, const std::unique_ptr<Goal> &b) {
 256         return b->Urgency() < a->Urgency();
 257 }
 258
 259 }
 260
 261 void Creature::Tick(double dt) {
 262         TickState(dt);
 263         TickStats(dt);
 264         TickBrain(dt);
 265 }
 266
 267 void Creature::TickState(double dt) {
 268         steering.MaxSpeed(Dexerty());
 269         steering.MaxForce(Strength());
 270         Situation::State state(situation.GetState());
 271         Situation::Derivative a(Step(Situation::Derivative(), 0.0));
 272         Situation::Derivative b(Step(a, dt * 0.5));
 273         Situation::Derivative c(Step(b, dt * 0.5));
 274         Situation::Derivative d(Step(c, dt));
 275         Situation::Derivative f(
 276                 (1.0 / 6.0) * (a.vel + 2.0 * (b.vel + c.vel) + d.vel),
 277                 (1.0 / 6.0) * (a.acc + 2.0 * (b.acc + c.acc) + d.acc)
 278         );
 279         state.pos += f.vel * dt;
 280         state.vel += f.acc * dt;
 281         if (length2(state.vel) > 0.000001) {
 282                 glm::dvec3 nvel(normalize(state.vel));
 283                 double ang = angle(nvel, state.dir);
 284                 double turn_rate = PI * 0.5 * dt;
 285                 if (ang < turn_rate) {
 286                         state.dir = normalize(state.vel);
 287                 } else if (std::abs(ang - PI) < 0.001) {
 288                         state.dir = rotate(state.dir, turn_rate, world::Planet::SurfaceNormal(situation.Surface()));
 289                 } else {
 290                         state.dir = rotate(state.dir, turn_rate, normalize(cross(state.dir, nvel)));
 291                 }
 292         }
 293         situation.SetState(state);
 294         stats.Exhaustion().Add(length(f.acc) * Mass() / Stamina() * dt);
 295 }
 296
 297 Situation::Derivative Creature::Step(const Situation::Derivative &ds, double dt) const noexcept {
 298         Situation::State s = situation.GetState();
 299         s.pos += ds.vel * dt;
 300         s.vel += ds.acc * dt;
 301         return {
 302                 s.vel,
 303                 steering.Force(s) / Mass()
 304         };
 305 }
 306
 307 void Creature::TickStats(double dt) {
 308         for (auto &s : stats.stat) {
 309                 s.Add(s.gain * dt);
 310         }
 311         stats.Breath().Add(stats.Breath().gain * stats.Exhaustion().value * dt);
 312         // TODO: damage values depending on properties
 313         if (stats.Breath().Full()) {
 314                 constexpr double dps = 1.0 / 4.0;
 315                 Hurt(dps * dt);
 316         }
 317         if (stats.Thirst().Full()) {
 318                 constexpr double dps = 1.0 / 32.0;
 319                 Hurt(dps * dt);
 320         }
 321         if (stats.Hunger().Full()) {
 322                 constexpr double dps = 1.0 / 128.0;
 323                 Hurt(dps * dt);
 324         }
 325 }
 326
 327 void Creature::TickBrain(double dt) {
 328         bg_task->Tick(dt);
 329         bg_task->Action();
 330         memory.Tick(dt);
 331         // do background stuff
 332         if (goals.empty()) {
 333                 return;
 334         }
 335         for (auto &goal : goals) {
 336                 goal->Tick(dt);
 337         }
 338         // if active goal can be interrupted, check priorities
 339         if (goals.size() > 1 && goals[0]->Interruptible()) {
 340                 std::sort(goals.begin(), goals.end(), GoalCompare);
 341         }
 342         goals[0]->Action();
 343         for (auto goal = goals.begin(); goal != goals.end();) {
 344                 if ((*goal)->Complete()) {
 345                         goals.erase(goal);
 346                 } else {
 347                         ++goal;
 348                 }
 349         }
 350 }
 351
 352 glm::dmat4 Creature::LocalTransform() noexcept {
 353         const double half_size = size * 0.5;
 354         const glm::dvec3 &pos = situation.Position();
 355         const glm::dmat3 srf(world::Planet::SurfaceOrientation(situation.Surface()));
 356         return glm::translate(glm::dvec3(pos.x, pos.y, pos.z + half_size))
 357                 * glm::rotate(glm::orientedAngle(-srf[2], situation.Heading(), srf[1]), srf[1])
 358                 * glm::dmat4(srf)
 359                 * glm::scale(glm::dvec3(half_size, half_size, half_size));
 360 }
 361
 362 void Creature::BuildVAO() {
 363         vao.Bind();
 364         vao.BindAttributes();
 365         vao.EnableAttribute(0);
 366         vao.EnableAttribute(1);
 367         vao.EnableAttribute(2);
 368         vao.AttributePointer<glm::vec3>(0, false, offsetof(Attributes, position));
 369         vao.AttributePointer<glm::vec3>(1, false, offsetof(Attributes, normal));
 370         vao.AttributePointer<glm::vec3>(2, false, offsetof(Attributes, texture));
 371         vao.ReserveAttributes(6 * 4, GL_STATIC_DRAW);
 372         {
 373                 auto attrib = vao.MapAttributes(GL_WRITE_ONLY);
 374                 const float offset = 1.0f;
 375                 for (int surface = 0; surface < 6; ++surface) {
 376                         const float tex_u_begin = surface < 3 ? 1.0f : 0.0f;
 377                         const float tex_u_end = surface < 3 ? 0.0f : 1.0f;
 378
 379                         attrib[4 * surface + 0].position[(surface + 0) % 3] = -offset;
 380                         attrib[4 * surface + 0].position[(surface + 1) % 3] = -offset;
 381                         attrib[4 * surface + 0].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 382                         attrib[4 * surface + 0].normal[(surface + 0) % 3] = 0.0f;
 383                         attrib[4 * surface + 0].normal[(surface + 1) % 3] = 0.0f;
 384                         attrib[4 * surface + 0].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 385                         attrib[4 * surface + 0].texture.x = tex_u_begin;
 386                         attrib[4 * surface + 0].texture.y = 1.0f;
 387                         attrib[4 * surface + 0].texture.z = surface;
 388
 389                         attrib[4 * surface + 1].position[(surface + 0) % 3] = -offset;
 390                         attrib[4 * surface + 1].position[(surface + 1) % 3] =  offset;
 391                         attrib[4 * surface + 1].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 392                         attrib[4 * surface + 1].normal[(surface + 0) % 3] = 0.0f;
 393                         attrib[4 * surface + 1].normal[(surface + 1) % 3] = 0.0f;
 394                         attrib[4 * surface + 1].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 395                         attrib[4 * surface + 1].texture.x = tex_u_end;
 396                         attrib[4 * surface + 1].texture.y = 1.0f;
 397                         attrib[4 * surface + 1].texture.z = surface;
 398
 399                         attrib[4 * surface + 2].position[(surface + 0) % 3] =  offset;
 400                         attrib[4 * surface + 2].position[(surface + 1) % 3] = -offset;
 401                         attrib[4 * surface + 2].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 402                         attrib[4 * surface + 2].normal[(surface + 0) % 3] = 0.0f;
 403                         attrib[4 * surface + 2].normal[(surface + 1) % 3] = 0.0f;
 404                         attrib[4 * surface + 2].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 405                         attrib[4 * surface + 2].texture.x = tex_u_begin;
 406                         attrib[4 * surface + 2].texture.y = 0.0f;
 407                         attrib[4 * surface + 2].texture.z = surface;
 408
 409                         attrib[4 * surface + 3].position[(surface + 0) % 3] = offset;
 410                         attrib[4 * surface + 3].position[(surface + 1) % 3] = offset;
 411                         attrib[4 * surface + 3].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 412                         attrib[4 * surface + 3].normal[(surface + 0) % 3] = 0.0f;
 413                         attrib[4 * surface + 3].normal[(surface + 1) % 3] = 0.0f;
 414                         attrib[4 * surface + 3].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 415                         attrib[4 * surface + 3].texture.x = tex_u_end;
 416                         attrib[4 * surface + 3].texture.y = 0.0f;
 417                         attrib[4 * surface + 3].texture.z = surface;
 418                 }
 419         }
 420         vao.BindElements();
 421         vao.ReserveElements(6 * 6, GL_STATIC_DRAW);
 422         {
 423                 auto element = vao.MapElements(GL_WRITE_ONLY);
 424                 for (int surface = 0; surface < 3; ++surface) {
 425                         element[6 * surface + 0] = 4 * surface + 0;
 426                         element[6 * surface + 1] = 4 * surface + 2;
 427                         element[6 * surface + 2] = 4 * surface + 1;
 428                         element[6 * surface + 3] = 4 * surface + 1;
 429                         element[6 * surface + 4] = 4 * surface + 2;
 430                         element[6 * surface + 5] = 4 * surface + 3;
 431                 }
 432                 for (int surface = 3; surface < 6; ++surface) {
 433                         element[6 * surface + 0] = 4 * surface + 0;
 434                         element[6 * surface + 1] = 4 * surface + 1;
 435                         element[6 * surface + 2] = 4 * surface + 2;
 436                         element[6 * surface + 3] = 4 * surface + 2;
 437                         element[6 * surface + 4] = 4 * surface + 1;
 438                         element[6 * surface + 5] = 4 * surface + 3;
 439                 }
 440         }
 441         vao.Unbind();
 442 }
 443
 444 void Creature::Draw(graphics::Viewport &viewport) {
 445         vao.Bind();
 446         vao.DrawTriangles(6 * 6);
 447 }
 448
 449
 450 void Spawn(Creature &c, world::Planet &p) {
 451         p.AddCreature(&c);
 452         c.GetSituation().SetPlanetSurface(p, 0, p.TileCenter(0, p.SideLength() / 2, p.SideLength() / 2));
 453         c.GetSituation().Heading(-world::Planet::SurfaceOrientation(0)[2]);
 454
 455         // probe surrounding area for common resources
 456         int start = p.SideLength() / 2 - 2;
 457         int end = start + 5;
 458         std::map<int, double> yields;
 459         for (int y = start; y < end; ++y) {
 460                 for (int x = start; x < end; ++x) {
 461                         const world::TileType &t = p.TypeAt(0, x, y);
 462                         for (auto yield : t.resources) {
 463                                 yields[yield.resource] += yield.ubiquity;
 464                         }
 465                 }
 466         }
 467         int liquid = -1;
 468         int solid = -1;
 469         for (auto e : yields) {
 470                 if (c.GetSimulation().Resources()[e.first].state == world::Resource::LIQUID) {
 471                         if (liquid < 0 || e.second > yields[liquid]) {
 472                                 liquid = e.first;
 473                         }
 474                 } else if (c.GetSimulation().Resources()[e.first].state == world::Resource::SOLID) {
 475                         if (solid < 0 || e.second > yields[solid]) {
 476                                 solid = e.first;
 477                         }
 478                 }
 479         }
 480
 481         Genome genome;
 482         genome.properties.Strength() = { 2.0, 0.1 };
 483         genome.properties.Stamina() = { 4.0, 0.1 };
 484         genome.properties.Dexerty() = { 2.0, 0.1 };
 485         genome.properties.Intelligence() = { 1.0, 0.1 };
 486         genome.properties.Lifetime() = { 480.0, 60.0 };
 487         genome.properties.Fertility() = { 0.5, 0.03 };
 488         genome.properties.Mutability() = { 1.0, 0.1 };
 489         genome.properties.OffspringMass() = { 0.3, 0.02 };
 490
 491         glm::dvec3 color_avg(0.0);
 492         double color_divisor = 0.0;
 493
 494         if (p.HasAtmosphere()) {
 495                 c.AddMass(p.Atmosphere(), 0.01);
 496                 color_avg += c.GetSimulation().Resources()[p.Atmosphere()].base_color * 0.1;
 497                 color_divisor += 0.1;
 498         }
 499         if (liquid > -1) {
 500                 c.AddMass(liquid, 0.3);
 501                 color_avg += c.GetSimulation().Resources()[liquid].base_color * 0.5;
 502                 color_divisor += 0.5;
 503         }
 504         if (solid > -1) {
 505                 c.AddMass(solid, 0.1);
 506                 color_avg += c.GetSimulation().Resources()[solid].base_color;
 507                 color_divisor += 1.0;
 508         }
 509
 510         if (color_divisor > 0.001) {
 511                 color_avg /= color_divisor;
 512         }
 513         glm::dvec3 hsl = rgb2hsl(color_avg);
 514         genome.base_hue = { hsl.x, 0.01 };
 515         genome.base_saturation = { hsl.y, 0.01 };
 516         genome.base_lightness = { hsl.z, 0.01 };
 517
 518         genome.Configure(c);
 519 }
 520
 521 void Genome::Configure(Creature &c) const {
 522         c.GetGenome() = *this;
 523
 524         math::GaloisLFSR &random = c.GetSimulation().Assets().random;
 525
 526         c.GetProperties() = Instantiate(properties, random);
 527
 528         // TODO: derive stats from properties
 529         c.GetStats().Damage().gain = (-1.0 / 100.0);
 530         c.GetStats().Breath().gain = (1.0 / 5.0);
 531         c.GetStats().Thirst().gain = (1.0 / 60.0);
 532         c.GetStats().Hunger().gain = (1.0 / 200.0);
 533         c.GetStats().Exhaustion().gain = (-1.0 / 100.0);
 534         c.GetStats().Fatigue().gain = (-1.0 / 100.0);
 535         c.GetStats().Boredom().gain = (1.0 / 300.0);
 536
 537         glm::dvec3 base_color(
 538                 std::fmod(base_hue.FakeNormal(random.SNorm()) + 1.0, 1.0),
 539                 glm::clamp(base_saturation.FakeNormal(random.SNorm()), 0.0, 1.0),
 540                 glm::clamp(base_lightness.FakeNormal(random.SNorm()), 0.0, 1.0)
 541         );
 542         glm::dvec3 highlight_color(
 543                 std::fmod(base_color.x + 0.5, 1.0),
 544                 1.0 - base_color.y,
 545                 1.0 - base_color.z
 546         );
 547         c.BaseColor(hsl2rgb(base_color));
 548         c.HighlightColor(hsl2rgb(highlight_color));
 549         c.SetBackgroundTask(std::unique_ptr<Goal>(new BlobBackgroundTask(c)));
 550         c.AddGoal(std::unique_ptr<Goal>(new IdleGoal(c)));
 551 }
 552
 553
 554 void Split(Creature &c) {
 555         Creature *a = new Creature(c.GetSimulation());
 556         const Situation &s = c.GetSituation();
 557         a->Name(c.GetSimulation().Assets().name.Sequential());
 558         c.GetGenome().Configure(*a);
 559         for (const auto &cmp : c.GetComposition()) {
 560                 a->AddMass(cmp.resource, cmp.value * 0.5);
 561         }
 562         s.GetPlanet().AddCreature(a);
 563         // TODO: duplicate situation somehow
 564         a->GetSituation().SetPlanetSurface(
 565                 s.GetPlanet(), s.Surface(),
 566                 s.Position() + glm::dvec3(0.0, a->Size() + 0.1, 0.0));
 567         a->BuildVAO();
 568         std::cout << "[" << int(c.GetSimulation().Time()) << "s] "
 569                 << a->Name() << " was born" << std::endl;
 570
 571         Creature *b = new Creature(c.GetSimulation());
 572         b->Name(c.GetSimulation().Assets().name.Sequential());
 573         c.GetGenome().Configure(*b);
 574         for (const auto &cmp : c.GetComposition()) {
 575                 b->AddMass(cmp.resource, cmp.value * 0.5);
 576         }
 577         s.GetPlanet().AddCreature(b);
 578         b->GetSituation().SetPlanetSurface(
 579                 s.GetPlanet(), s.Surface(),
 580                 s.Position() + glm::dvec3(0.0, b->Size() - 0.1, 0.0));
 581         b->BuildVAO();
 582         std::cout << "[" << int(c.GetSimulation().Time()) << "s] "
 583                 << b->Name() << " was born" << std::endl;
 584
 585         c.Die();
 586 }
 587
 588
 589 Memory::Memory(Creature &c)
 590 : c(c) {
 591 }
 592
 593 Memory::~Memory() {
 594 }
 595
 596 void Memory::Tick(double dt) {
 597         Situation &s = c.GetSituation();
 598         if (s.OnTile()) {
 599                 TrackStay({ &s.GetPlanet(), s.Surface(), s.SurfacePosition() }, dt);
 600         }
 601 }
 602
 603 void Memory::TrackStay(const Location &l, double t) {
 604         const world::TileType &type = l.planet->TypeAt(l.surface, l.coords.x, l.coords.y);
 605         auto entry = known_types.find(type.id);
 606         if (entry != known_types.end()) {
 607                 if (c.GetSimulation().Time() - entry->second.last_been > c.GetProperties().Lifetime() * 0.1) {
 608                         // "it's been ages"
 609                         if (entry->second.time_spent > c.Age() * 0.25) {
 610                                 // the place is very familiar
 611                                 c.GetStats().Boredom().Add(-0.2);
 612                         } else {
 613                                 // infrequent stays
 614                                 c.GetStats().Boredom().Add(-0.1);
 615                         }
 616                 }
 617                 entry->second.last_been = c.GetSimulation().Time();
 618                 entry->second.last_loc = l;
 619                 entry->second.time_spent += t;
 620         } else {
 621                 known_types.emplace(type.id, Stay{
 622                         c.GetSimulation().Time(),
 623                         l,
 624                         c.GetSimulation().Time(),
 625                         l,
 626                         t
 627                 });
 628                 // completely new place, interesting
 629                 // TODO: scale by personality trait
 630                 c.GetStats().Boredom().Add(-0.25);
 631         }
 632 }
 633
 634
 635 NameGenerator::NameGenerator()
 636 : counter(0) {
 637 }
 638
 639 NameGenerator::~NameGenerator() {
 640 }
 641
 642 std::string NameGenerator::Sequential() {
 643         std::stringstream ss;
 644         ss << "Blob " << ++counter;
 645         return ss.str();
 646 }
 647
 648
 649 Situation::Situation()
 650 : planet(nullptr)
 651 , state(glm::dvec3(0.0), glm::dvec3(0.0))
 652 , surface(0)
 653 , type(LOST) {
 654 }
 655
 656 Situation::~Situation() {
 657 }
 658
 659 bool Situation::OnPlanet() const noexcept {
 660         return type == PLANET_SURFACE;
 661 }
 662
 663 bool Situation::OnSurface() const noexcept {
 664         return type == PLANET_SURFACE;
 665 }
 666
 667 bool Situation::OnTile() const noexcept {
 668         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
 669         return type == PLANET_SURFACE
 670                 && t.x >= 0 && t.x < planet->SideLength()
 671                 && t.y >= 0 && t.y < planet->SideLength();
 672 }
 673
 674 glm::ivec2 Situation::SurfacePosition() const noexcept {
 675         return planet->SurfacePosition(surface, state.pos);
 676 }
 677
 678 world::Tile &Situation::GetTile() const noexcept {
 679         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
 680         return planet->TileAt(surface, t.x, t.y);
 681 }
 682
 683 const world::TileType &Situation::GetTileType() const noexcept {
 684         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
 685         return planet->TypeAt(surface, t.x, t.y);
 686 }
 687
 688 void Situation::Move(const glm::dvec3 &dp) noexcept {
 689         state.pos += dp;
 690         if (OnSurface()) {
 691                 // enforce ground constraint
 692                 if (Surface() < 3) {
 693                         state.pos[(Surface() + 2) % 3] = std::max(0.0, state.pos[(Surface() + 2) % 3]);
 694                 } else {
 695                         state.pos[(Surface() + 2) % 3] = std::min(0.0, state.pos[(Surface() + 2) % 3]);
 696                 }
 697         }
 698 }
 699
 700 void Situation::SetPlanetSurface(world::Planet &p, int srf, const glm::dvec3 &pos) noexcept {
 701         type = PLANET_SURFACE;
 702         planet = &p;
 703         surface = srf;
 704         state.pos = pos;
 705 }
 706
 707
 708 Steering::Steering(const Creature &c)
 709 : c(c)
 710 , target(0.0)
 711 , haste(0.0)
 712 , max_force(1.0)
 713 , max_speed(1.0)
 714 , min_dist(0.0)
 715 , max_look(0.0)
 716 , separating(false)
 717 , halting(true)
 718 , seeking(false)
 719 , arriving(false) {
 720 }
 721
 722 Steering::~Steering() {
 723 }
 724
 725 void Steering::Separate(double min_distance, double max_lookaround) noexcept {
 726         separating = true;
 727         min_dist = min_distance;
 728         max_look = max_lookaround;
 729 }
 730
 731 void Steering::DontSeparate() noexcept {
 732         separating = false;
 733 }
 734
 735 void Steering::ResumeSeparate() noexcept {
 736         separating = false;
 737 }
 738
 739 void Steering::Halt() noexcept {
 740         halting = true;
 741         seeking = false;
 742         arriving = false;
 743 }
 744
 745 void Steering::Pass(const glm::dvec3 &t) noexcept {
 746         target = t;
 747         halting = false;
 748         seeking = true;
 749         arriving = false;
 750 }
 751
 752 void Steering::GoTo(const glm::dvec3 &t) noexcept {
 753         target = t;
 754         halting = false;
 755         seeking = false;
 756         arriving = true;
 757 }
 758
 759 glm::dvec3 Steering::Force(const Situation::State &s) const noexcept {
 760         double speed = max_speed * glm::clamp(max_speed * haste * haste, 0.25, 1.0);
 761         double force = max_speed * glm::clamp(max_force * haste * haste, 0.5, 1.0);
 762         glm::dvec3 result(0.0);
 763         if (separating) {
 764                 // TODO: off surface situation
 765                 glm::dvec3 repulse(0.0);
 766                 const Situation &s = c.GetSituation();
 767                 for (auto &other : s.GetPlanet().Creatures()) {
 768                         if (&*other == &c) continue;
 769                         glm::dvec3 diff = s.Position() - other->GetSituation().Position();
 770                         if (length2(diff) > max_look * max_look) continue;
 771                         double sep = length(diff) - other->Size() * 0.707 - c.Size() * 0.707;
 772                         if (sep < min_dist) {
 773                                 repulse += normalize(diff) * (1.0 - sep / min_dist);
 774                         }
 775                 }
 776                 SumForce(result, repulse, force);
 777         }
 778         if (halting) {
 779                 SumForce(result, s.vel * -force, force);
 780         }
 781         if (seeking) {
 782                 glm::dvec3 diff = target - s.pos;
 783                 if (!allzero(diff)) {
 784                         SumForce(result, TargetVelocity(s, (normalize(diff) * speed), force), force);
 785                 }
 786         }
 787         if (arriving) {
 788                 glm::dvec3 diff = target - s.pos;
 789                 double dist = length(diff);
 790                 if (!allzero(diff) && dist > std::numeric_limits<double>::epsilon()) {
 791                         SumForce(result, TargetVelocity(s, diff * std::min(dist * force, speed) / dist, force), force);
 792                 }
 793         }
 794         return result;
 795 }
 796
 797 bool Steering::SumForce(glm::dvec3 &out, const glm::dvec3 &in, double max) const noexcept {
 798         if (allzero(in) || anynan(in)) {
 799                 return false;
 800         }
 801         double cur = allzero(out) ? 0.0 : length(out);
 802         double rem = max - cur;
 803         if (rem < 0.0) {
 804                 return true;
 805         }
 806         double add = length(in);
 807         if (add > rem) {
 808                 // this method is off if in and out are in different
 809                 // directions, but gives okayish results
 810                 out += in * (1.0 / add);
 811                 return true;
 812         } else {
 813                 out += in;
 814                 return false;
 815         }
 816 }
 817
 818 glm::dvec3 Steering::TargetVelocity(const Situation::State &s, const glm::dvec3 &vel, double acc) const noexcept {
 819         return (vel - s.vel) * acc;
 820 }
 821
 822 }
 823 }