src/creature/creature.cpp

   1 #include "Creature.hpp"
   2 #include "Genome.hpp"
   3 #include "Memory.hpp"
   4 #include "NameGenerator.hpp"
   5 #include "Situation.hpp"
   6 #include "Steering.hpp"
   7
   8 #include "BlobBackgroundTask.hpp"
   9 #include "Goal.hpp"
  10 #include "IdleGoal.hpp"
  11 #include "InhaleNeed.hpp"
  12 #include "IngestNeed.hpp"
  13 #include "Need.hpp"
  14 #include "../app/Assets.hpp"
  15 #include "../math/const.hpp"
  16 #include "../world/Body.hpp"
  17 #include "../world/Planet.hpp"
  18 #include "../world/Simulation.hpp"
  19 #include "../world/TileType.hpp"
  20
  21 #include <algorithm>
  22 #include <sstream>
  23 #include <glm/gtx/transform.hpp>
  24 #include <glm/gtx/vector_angle.hpp>
  25
  26 #include <iostream>
  27 #include <glm/gtx/io.hpp>
  28
  29
  30 namespace blobs {
  31 namespace creature {
  32
  33 Creature::Creature(world::Simulation &sim)
  34 : sim(sim)
  35 , name()
  36 , genome()
  37 , properties()
  38 , cur_prop(0)
  39 , base_color(1.0)
  40 , highlight_color(0.0)
  41 , mass(1.0)
  42 , density(1.0)
  43 , size(1.0)
  44 , birth(sim.Time())
  45 , health(1.0)
  46 , on_death()
  47 , removable(false)
  48 , memory(*this)
  49 , bg_task()
  50 , needs()
  51 , goals()
  52 , situation()
  53 , steering(*this)
  54 , vao() {
  55         // all creatures avoid each other for now
  56         steering.Separate(0.1, 1.5);
  57 }
  58
  59 Creature::~Creature() {
  60 }
  61
  62 glm::dvec4 Creature::HighlightColor() const noexcept {
  63         return glm::dvec4(highlight_color, AgeLerp(CurProps().highlight, NextProps().highlight));
  64 }
  65
  66 void Creature::Ingest(int res, double amount) noexcept {
  67         const Genome::Composition *cmp = nullptr;
  68         for (const auto &c : genome.composition) {
  69                 if (c.resource == res) {
  70                         cmp = &c;
  71                         break;
  72                 }
  73         }
  74         if (cmp) {
  75                 const double max_mass = AgeLerp(CurProps().mass, NextProps().mass);
  76                 Mass(std::min(max_mass, mass + amount));
  77         } else {
  78                 // foreign material. poisonous?
  79         }
  80 }
  81
  82 void Creature::Hurt(double dt) noexcept {
  83         health = std::max(0.0, health - dt);
  84         if (health == 0.0) {
  85                 std::cout << "[" << int(sim.Time()) << "s] "
  86                         << name << " died" << std::endl;
  87                 Die();
  88         }
  89 }
  90
  91 void Creature::Die() noexcept {
  92         needs.clear();
  93         goals.clear();
  94         steering.Halt();
  95         if (on_death) {
  96                 on_death(*this);
  97         }
  98         Remove();
  99 }
 100
 101 double Creature::Size() const noexcept {
 102         return size;
 103 }
 104
 105 double Creature::Age() const noexcept {
 106         return sim.Time() - birth;
 107 }
 108
 109 std::string Creature::AgeName() const {
 110         switch (cur_prop) {
 111                 case 0:
 112                         return "Newborn";
 113                 case 1:
 114                         return "Child";
 115                 case 2:
 116                         return "Youth";
 117                 case 3:
 118                         return "Adult";
 119                 case 4:
 120                         return "Elder";
 121                 case 5:
 122                         return "Dead";
 123                 default:
 124                         return "Unknown";
 125         }
 126 }
 127
 128 double Creature::AgeLerp(double from, double to) const noexcept {
 129         return glm::mix(from, to, glm::smoothstep(CurProps().age, NextProps().age, Age()));
 130 }
 131
 132 double Creature::Fertility() const noexcept {
 133         return AgeLerp(CurProps().fertility, NextProps().fertility) * (1.0 / 3600.0);
 134 }
 135
 136 double Creature::Mutability() const noexcept {
 137         return GetProperties().mutability * (1.0 / 3600.0);
 138 }
 139
 140 void Creature::AddGoal(std::unique_ptr<Goal> &&g) {
 141         g->Enable();
 142         goals.emplace_back(std::move(g));
 143 }
 144
 145 namespace {
 146
 147 bool GoalCompare(const std::unique_ptr<Goal> &a, const std::unique_ptr<Goal> &b) {
 148         return b->Urgency() < a->Urgency();
 149 }
 150
 151 }
 152
 153 void Creature::Tick(double dt) {
 154         if (cur_prop < 5 && Age() > NextProps().age) {
 155                 ++cur_prop;
 156                 if (cur_prop == 5) {
 157                         std::cout << "[" << int(sim.Time()) << "s] "
 158                                 << name << " died of old age" << std::endl;
 159                         Die();
 160                 } else {
 161                         std::cout << "[" << int(sim.Time()) << "s] "
 162                                 << name << " grew up to " << AgeName() << std::endl;
 163                 }
 164         }
 165
 166         {
 167                 Situation::State state(situation.GetState());
 168                 Situation::Derivative a(Step(Situation::Derivative(), 0.0));
 169                 Situation::Derivative b(Step(a, dt * 0.5));
 170                 Situation::Derivative c(Step(b, dt * 0.5));
 171                 Situation::Derivative d(Step(c, dt));
 172                 Situation::Derivative f(
 173                         (1.0 / 6.0) * (a.vel + 2.0 * (b.vel + c.vel) + d.vel),
 174                         (1.0 / 6.0) * (a.acc + 2.0 * (b.acc + c.acc) + d.acc)
 175                 );
 176                 state.pos += f.vel * dt;
 177                 state.vel += f.acc * dt;
 178                 if (length2(state.vel) > 0.000001) {
 179                         glm::dvec3 nvel(normalize(state.vel));
 180                         double ang = angle(nvel, state.dir);
 181                         double turn_rate = PI * dt;
 182                         if (ang < turn_rate) {
 183                                 state.dir = normalize(state.vel);
 184                         } else if (std::abs(ang - PI) < 0.001) {
 185                                 state.dir = rotate(state.dir, turn_rate, world::Planet::SurfaceNormal(situation.Surface()));
 186                         } else {
 187                                 state.dir = rotate(state.dir, turn_rate, normalize(cross(state.dir, nvel)));
 188                         }
 189                 }
 190
 191                 situation.SetState(state);
 192         }
 193
 194         bg_task->Tick(dt);
 195         bg_task->Action();
 196         memory.Tick(dt);
 197         for (auto &need : needs) {
 198                 need->Tick(dt);
 199         }
 200         for (auto &goal : goals) {
 201                 goal->Tick(dt);
 202         }
 203         // do background stuff
 204         for (auto &need : needs) {
 205                 need->ApplyEffect(*this, dt);
 206         }
 207         if (goals.empty()) {
 208                 return;
 209         }
 210         // if active goal can be interrupted, check priorities
 211         if (goals.size() > 1 && goals[0]->Interruptible()) {
 212                 std::sort(goals.begin(), goals.end(), GoalCompare);
 213         }
 214         goals[0]->Action();
 215         for (auto goal = goals.begin(); goal != goals.end();) {
 216                 if ((*goal)->Complete()) {
 217                         goals.erase(goal);
 218                 } else {
 219                         ++goal;
 220                 }
 221         }
 222 }
 223
 224 Situation::Derivative Creature::Step(const Situation::Derivative &ds, double dt) const noexcept {
 225         Situation::State s = situation.GetState();
 226         s.pos += ds.vel * dt;
 227         s.vel += ds.acc * dt;
 228         return {
 229                 s.vel,
 230                 steering.Acceleration(s)
 231         };
 232 }
 233
 234 glm::dmat4 Creature::LocalTransform() noexcept {
 235         const double half_size = size * 0.5;
 236         const glm::dvec3 &pos = situation.Position();
 237         const glm::dmat3 srf(world::Planet::SurfaceOrientation(situation.Surface()));
 238         return glm::translate(glm::dvec3(pos.x, pos.y, pos.z + half_size))
 239                 * glm::rotate(glm::orientedAngle(-srf[2], situation.Heading(), srf[1]), srf[1])
 240                 * glm::dmat4(srf)
 241                 * glm::scale(glm::dvec3(half_size, half_size, half_size));
 242 }
 243
 244 void Creature::BuildVAO() {
 245         vao.Bind();
 246         vao.BindAttributes();
 247         vao.EnableAttribute(0);
 248         vao.EnableAttribute(1);
 249         vao.EnableAttribute(2);
 250         vao.AttributePointer<glm::vec3>(0, false, offsetof(Attributes, position));
 251         vao.AttributePointer<glm::vec3>(1, false, offsetof(Attributes, normal));
 252         vao.AttributePointer<glm::vec3>(2, false, offsetof(Attributes, texture));
 253         vao.ReserveAttributes(6 * 4, GL_STATIC_DRAW);
 254         {
 255                 auto attrib = vao.MapAttributes(GL_WRITE_ONLY);
 256                 const float offset = 1.0f;
 257                 for (int surface = 0; surface < 6; ++surface) {
 258                         const float tex_u_begin = surface < 3 ? 1.0f : 0.0f;
 259                         const float tex_u_end = surface < 3 ? 0.0f : 1.0f;
 260
 261                         attrib[4 * surface + 0].position[(surface + 0) % 3] = -offset;
 262                         attrib[4 * surface + 0].position[(surface + 1) % 3] = -offset;
 263                         attrib[4 * surface + 0].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 264                         attrib[4 * surface + 0].normal[(surface + 0) % 3] = 0.0f;
 265                         attrib[4 * surface + 0].normal[(surface + 1) % 3] = 0.0f;
 266                         attrib[4 * surface + 0].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 267                         attrib[4 * surface + 0].texture.x = tex_u_begin;
 268                         attrib[4 * surface + 0].texture.y = 1.0f;
 269                         attrib[4 * surface + 0].texture.z = surface;
 270
 271                         attrib[4 * surface + 1].position[(surface + 0) % 3] = -offset;
 272                         attrib[4 * surface + 1].position[(surface + 1) % 3] =  offset;
 273                         attrib[4 * surface + 1].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 274                         attrib[4 * surface + 1].normal[(surface + 0) % 3] = 0.0f;
 275                         attrib[4 * surface + 1].normal[(surface + 1) % 3] = 0.0f;
 276                         attrib[4 * surface + 1].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 277                         attrib[4 * surface + 1].texture.x = tex_u_end;
 278                         attrib[4 * surface + 1].texture.y = 1.0f;
 279                         attrib[4 * surface + 1].texture.z = surface;
 280
 281                         attrib[4 * surface + 2].position[(surface + 0) % 3] =  offset;
 282                         attrib[4 * surface + 2].position[(surface + 1) % 3] = -offset;
 283                         attrib[4 * surface + 2].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 284                         attrib[4 * surface + 2].normal[(surface + 0) % 3] = 0.0f;
 285                         attrib[4 * surface + 2].normal[(surface + 1) % 3] = 0.0f;
 286                         attrib[4 * surface + 2].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 287                         attrib[4 * surface + 2].texture.x = tex_u_begin;
 288                         attrib[4 * surface + 2].texture.y = 0.0f;
 289                         attrib[4 * surface + 2].texture.z = surface;
 290
 291                         attrib[4 * surface + 3].position[(surface + 0) % 3] = offset;
 292                         attrib[4 * surface + 3].position[(surface + 1) % 3] = offset;
 293                         attrib[4 * surface + 3].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
 294                         attrib[4 * surface + 3].normal[(surface + 0) % 3] = 0.0f;
 295                         attrib[4 * surface + 3].normal[(surface + 1) % 3] = 0.0f;
 296                         attrib[4 * surface + 3].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
 297                         attrib[4 * surface + 3].texture.x = tex_u_end;
 298                         attrib[4 * surface + 3].texture.y = 0.0f;
 299                         attrib[4 * surface + 3].texture.z = surface;
 300                 }
 301         }
 302         vao.BindElements();
 303         vao.ReserveElements(6 * 6, GL_STATIC_DRAW);
 304         {
 305                 auto element = vao.MapElements(GL_WRITE_ONLY);
 306                 for (int surface = 0; surface < 3; ++surface) {
 307                         element[6 * surface + 0] = 4 * surface + 0;
 308                         element[6 * surface + 1] = 4 * surface + 2;
 309                         element[6 * surface + 2] = 4 * surface + 1;
 310                         element[6 * surface + 3] = 4 * surface + 1;
 311                         element[6 * surface + 4] = 4 * surface + 2;
 312                         element[6 * surface + 5] = 4 * surface + 3;
 313                 }
 314                 for (int surface = 3; surface < 6; ++surface) {
 315                         element[6 * surface + 0] = 4 * surface + 0;
 316                         element[6 * surface + 1] = 4 * surface + 1;
 317                         element[6 * surface + 2] = 4 * surface + 2;
 318                         element[6 * surface + 3] = 4 * surface + 2;
 319                         element[6 * surface + 4] = 4 * surface + 1;
 320                         element[6 * surface + 5] = 4 * surface + 3;
 321                 }
 322         }
 323         vao.Unbind();
 324 }
 325
 326 void Creature::Draw(graphics::Viewport &viewport) {
 327         vao.Bind();
 328         vao.DrawTriangles(6 * 6);
 329 }
 330
 331
 332 void Spawn(Creature &c, world::Planet &p) {
 333         p.AddCreature(&c);
 334         c.GetSituation().SetPlanetSurface(p, 0, p.TileCenter(0, p.SideLength() / 2, p.SideLength() / 2));
 335         c.GetSituation().Heading(-world::Planet::SurfaceOrientation(0)[2]);
 336
 337         // probe surrounding area for common resources
 338         int start = p.SideLength() / 2 - 2;
 339         int end = start + 5;
 340         std::map<int, double> yields;
 341         for (int y = start; y < end; ++y) {
 342                 for (int x = start; x < end; ++x) {
 343                         const world::TileType &t = p.TypeAt(0, x, y);
 344                         for (auto yield : t.resources) {
 345                                 yields[yield.resource] += yield.ubiquity;
 346                         }
 347                 }
 348         }
 349         int liquid = -1;
 350         int solid = -1;
 351         for (auto e : yields) {
 352                 if (c.GetSimulation().Resources()[e.first].state == world::Resource::LIQUID) {
 353                         if (liquid < 0 || e.second > yields[liquid]) {
 354                                 liquid = e.first;
 355                         }
 356                 } else if (c.GetSimulation().Resources()[e.first].state == world::Resource::SOLID) {
 357                         if (solid < 0 || e.second > yields[solid]) {
 358                                 solid = e.first;
 359                         }
 360                 }
 361         }
 362
 363         Genome genome;
 364
 365         genome.properties.Birth().age = { 0.0, 0.0 };
 366         genome.properties.Birth().mass = { 0.5, 0.05 };
 367         genome.properties.Birth().fertility = { 0.0, 0.0 };
 368         genome.properties.Birth().highlight = { 0.0, 0.0 };
 369
 370         genome.properties.Child().age = { 30.0, 1.0 };
 371         genome.properties.Child().mass = { 0.7, 0.05 };
 372         genome.properties.Child().fertility = { 0.0, 0.0 };
 373         genome.properties.Child().highlight = { 0.2, 0.05 };
 374
 375         genome.properties.Youth().age = { 60.0, 5.0 };
 376         genome.properties.Youth().mass = { 0.9, 0.1 };
 377         genome.properties.Youth().fertility = { 0.5, 0.03 };
 378         genome.properties.Youth().highlight = { 0.9, 0.1 };
 379
 380         genome.properties.Adult().age = { 120.0, 10.0 };
 381         genome.properties.Adult().mass = { 1.3, 0.1 };
 382         genome.properties.Adult().fertility = { 0.4, 0.01 };
 383         genome.properties.Adult().highlight = { 0.7, 0.1 };
 384
 385         genome.properties.Elder().age = { 360.0, 30.0 };
 386         genome.properties.Elder().mass = { 1.0, 0.05 };
 387         genome.properties.Elder().fertility = { 0.1, 0.01 };
 388         genome.properties.Elder().highlight = { 0.6, 0.1 };
 389
 390         genome.properties.Death().age = { 480.0, 60.0 };
 391         genome.properties.Death().mass = { 0.9, 0.05 };
 392         genome.properties.Death().fertility = { 0.0, 0.0 };
 393         genome.properties.Death().highlight = { 0.5, 0.1 };
 394
 395         genome.properties.strength = { 1.0, 0.1 };
 396         genome.properties.stamina = { 1.0, 0.1 };
 397         genome.properties.dexerty = { 1.0, 0.1 };
 398         genome.properties.intelligence = { 1.0, 0.1 };
 399         genome.properties.mutability = { 1.0, 0.1 };
 400
 401         glm::dvec3 color_avg(0.0);
 402         double color_divisor = 0.0;
 403
 404         if (p.HasAtmosphere()) {
 405                 genome.composition.push_back({
 406                         p.Atmosphere(),    // resource
 407                         { 0.01, 0.00001 }, // mass
 408                         { 0.5,  0.001 },   // intake
 409                         { 0.1,  0.0005 },  // penalty
 410                         { 0.0,  0.0 },     // growth
 411                 });
 412                 color_avg += c.GetSimulation().Resources()[p.Atmosphere()].base_color * 0.1;
 413                 color_divisor += 0.1;
 414         }
 415         if (liquid > -1) {
 416                 genome.composition.push_back({
 417                         liquid,          // resource
 418                         { 0.6,  0.01 },  // mass
 419                         { 0.2,  0.001 }, // intake
 420                         { 0.01, 0.002 }, // penalty
 421                         { 0.1, 0.0 },   // growth
 422                 });
 423                 color_avg += c.GetSimulation().Resources()[liquid].base_color * 0.5;
 424                 color_divisor += 0.5;
 425         }
 426         if (solid > -1) {
 427                 genome.composition.push_back({
 428                         solid,             // resource
 429                         { 0.4,   0.01 },   // mass
 430                         { 0.4,   0.001 },  // intake
 431                         { 0.001, 0.0001 }, // penalty
 432                         { 10.0,  0.002 },   // growth
 433                 });
 434                 color_avg += c.GetSimulation().Resources()[solid].base_color;
 435                 color_divisor += 1.0;
 436         }
 437
 438         if (color_divisor > 0.001) {
 439                 color_avg /= color_divisor;
 440         }
 441         glm::dvec3 hsl = rgb2hsl(color_avg);
 442         genome.base_hue = { hsl.x, 0.01 };
 443         genome.base_saturation = { hsl.y, 0.01 };
 444         genome.base_lightness = { hsl.z, 0.01 };
 445
 446         genome.Configure(c);
 447 }
 448
 449 void Genome::Configure(Creature &c) const {
 450         c.GetGenome() = *this;
 451
 452         math::GaloisLFSR &random = c.GetSimulation().Assets().random;
 453
 454         c.GetProperties() = Instantiate(properties, random);
 455
 456         double mass = 0.0;
 457         double volume = 0.0;
 458         for (const auto &comp : composition) {
 459                 const world::Resource &resource = c.GetSimulation().Resources()[comp.resource];
 460                 double comp_mass = comp.mass.FakeNormal(random.SNorm());
 461                 double intake = comp.intake.FakeNormal(random.SNorm());
 462                 double penalty = comp.penalty.FakeNormal(random.SNorm());
 463
 464                 mass += comp_mass;
 465                 volume += comp_mass / c.GetSimulation().Resources()[comp.resource].density;
 466
 467                 std::unique_ptr<Need> need;
 468                 if (resource.state == world::Resource::SOLID) {
 469                         intake *= std::atan(c.GetProperties().strength);
 470                         need.reset(new IngestNeed(comp.resource, intake, penalty));
 471                         need->gain = intake * 0.05;
 472                 } else if (resource.state == world::Resource::LIQUID) {
 473                         intake *= std::atan(c.GetProperties().stamina);
 474                         need.reset(new IngestNeed(comp.resource, intake, penalty));
 475                         need->gain = intake * 0.1;
 476                 } else {
 477                         need.reset(new InhaleNeed(comp.resource, intake, penalty));
 478                         need->gain = intake * 0.5;
 479                 }
 480                 need->name = c.GetSimulation().Resources()[comp.resource].label;
 481                 need->growth = comp.growth.FakeNormal(random.SNorm());
 482                 need->value = 0.4;
 483                 need->inconvenient = 0.5;
 484                 need->critical = 0.95;
 485                 c.AddNeed(std::move(need));
 486         }
 487
 488         glm::dvec3 base_color(
 489                 std::fmod(base_hue.FakeNormal(random.SNorm()) + 1.0, 1.0),
 490                 glm::clamp(base_saturation.FakeNormal(random.SNorm()), 0.0, 1.0),
 491                 glm::clamp(base_lightness.FakeNormal(random.SNorm()), 0.0, 1.0)
 492         );
 493         glm::dvec3 highlight_color(
 494                 std::fmod(base_color.x + 0.5, 1.0),
 495                 1.0 - base_color.y,
 496                 1.0 - base_color.z
 497         );
 498         c.BaseColor(hsl2rgb(base_color));
 499         c.HighlightColor(hsl2rgb(highlight_color));
 500
 501         c.Mass(c.GetProperties().props[0].mass);
 502         c.Density(mass / volume);
 503         c.GetSteering().MaxAcceleration(1.4 * std::atan(c.GetProperties().strength));
 504         c.GetSteering().MaxSpeed(4.4 * std::atan(c.GetProperties().dexerty));
 505         c.SetBackgroundTask(std::unique_ptr<Goal>(new BlobBackgroundTask(c)));
 506         c.AddGoal(std::unique_ptr<Goal>(new IdleGoal(c)));
 507 }
 508
 509
 510 void Split(Creature &c) {
 511         Creature *a = new Creature(c.GetSimulation());
 512         const Situation &s = c.GetSituation();
 513         a->Name(c.GetSimulation().Assets().name.Sequential());
 514         c.GetGenome().Configure(*a);
 515         s.GetPlanet().AddCreature(a);
 516         // TODO: duplicate situation somehow
 517         a->GetSituation().SetPlanetSurface(
 518                 s.GetPlanet(), s.Surface(),
 519                 s.Position() + glm::dvec3(0.0, a->Size() * 0.51, 0.0));
 520         a->BuildVAO();
 521         std::cout << "[" << int(c.GetSimulation().Time()) << "s] "
 522                 << a->Name() << " was born" << std::endl;
 523
 524         Creature *b = new Creature(c.GetSimulation());
 525         b->Name(c.GetSimulation().Assets().name.Sequential());
 526         c.GetGenome().Configure(*b);
 527         s.GetPlanet().AddCreature(b);
 528         b->GetSituation().SetPlanetSurface(
 529                 s.GetPlanet(), s.Surface(),
 530                 s.Position() + glm::dvec3(0.0, b->Size() * -0.51, 0.0));
 531         b->BuildVAO();
 532         std::cout << "[" << int(c.GetSimulation().Time()) << "s] "
 533                 << b->Name() << " was born" << std::endl;
 534
 535         c.Die();
 536 }
 537
 538
 539 Memory::Memory(Creature &c)
 540 : c(c) {
 541 }
 542
 543 Memory::~Memory() {
 544 }
 545
 546 void Memory::Tick(double dt) {
 547         Situation &s = c.GetSituation();
 548         if (s.OnSurface()) {
 549                 TrackStay({ &s.GetPlanet(), s.Surface(), s.SurfacePosition() }, dt);
 550         }
 551 }
 552
 553 void Memory::TrackStay(const Location &l, double t) {
 554         const world::TileType &type = l.planet->TypeAt(l.surface, l.coords.x, l.coords.y);
 555         auto entry = known_types.find(type.id);
 556         if (entry != known_types.end()) {
 557                 entry->second.last_been = c.GetSimulation().Time();
 558                 entry->second.last_loc = l;
 559                 entry->second.time_spent += t;
 560         } else {
 561                 known_types.emplace(type.id, Stay{
 562                         c.GetSimulation().Time(),
 563                         l,
 564                         c.GetSimulation().Time(),
 565                         l,
 566                         t
 567                 });
 568         }
 569 }
 570
 571
 572 NameGenerator::NameGenerator()
 573 : counter(0) {
 574 }
 575
 576 NameGenerator::~NameGenerator() {
 577 }
 578
 579 std::string NameGenerator::Sequential() {
 580         std::stringstream ss;
 581         ss << "Blob " << ++counter;
 582         return ss.str();
 583 }
 584
 585
 586 Situation::Situation()
 587 : planet(nullptr)
 588 , state(glm::dvec3(0.0), glm::dvec3(0.0))
 589 , surface(0)
 590 , type(LOST) {
 591 }
 592
 593 Situation::~Situation() {
 594 }
 595
 596 bool Situation::OnPlanet() const noexcept {
 597         return type == PLANET_SURFACE;
 598 }
 599
 600 bool Situation::OnSurface() const noexcept {
 601         return type == PLANET_SURFACE;
 602 }
 603
 604 bool Situation::OnTile() const noexcept {
 605         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
 606         return type == PLANET_SURFACE
 607                 && t.x >= 0 && t.x < planet->SideLength()
 608                 && t.y >= 0 && t.y < planet->SideLength();
 609 }
 610
 611 glm::ivec2 Situation::SurfacePosition() const noexcept {
 612         return planet->SurfacePosition(surface, state.pos);
 613 }
 614
 615 world::Tile &Situation::GetTile() const noexcept {
 616         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
 617         return planet->TileAt(surface, t.x, t.y);
 618 }
 619
 620 const world::TileType &Situation::GetTileType() const noexcept {
 621         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
 622         return planet->TypeAt(surface, t.x, t.y);
 623 }
 624
 625 void Situation::Move(const glm::dvec3 &dp) noexcept {
 626         state.pos += dp;
 627         if (OnSurface()) {
 628                 // enforce ground constraint
 629                 if (Surface() < 3) {
 630                         state.pos[(Surface() + 2) % 3] = std::max(0.0, state.pos[(Surface() + 2) % 3]);
 631                 } else {
 632                         state.pos[(Surface() + 2) % 3] = std::min(0.0, state.pos[(Surface() + 2) % 3]);
 633                 }
 634         }
 635 }
 636
 637 void Situation::SetPlanetSurface(world::Planet &p, int srf, const glm::dvec3 &pos) noexcept {
 638         type = PLANET_SURFACE;
 639         planet = &p;
 640         surface = srf;
 641         state.pos = pos;
 642 }
 643
 644
 645 Steering::Steering(const Creature &c)
 646 : c(c)
 647 , target(0.0)
 648 , haste(0.0)
 649 , max_accel(1.0)
 650 , max_speed(1.0)
 651 , min_dist(0.0)
 652 , max_look(0.0)
 653 , separating(false)
 654 , halting(true)
 655 , seeking(false)
 656 , arriving(false) {
 657 }
 658
 659 Steering::~Steering() {
 660 }
 661
 662 void Steering::Separate(double min_distance, double max_lookaround) noexcept {
 663         separating = true;
 664         min_dist = min_distance;
 665         max_look = max_lookaround;
 666 }
 667
 668 void Steering::DontSeparate() noexcept {
 669         separating = false;
 670 }
 671
 672 void Steering::Halt() noexcept {
 673         halting = true;
 674         seeking = false;
 675         arriving = false;
 676 }
 677
 678 void Steering::Pass(const glm::dvec3 &t) noexcept {
 679         target = t;
 680         halting = false;
 681         seeking = true;
 682         arriving = false;
 683 }
 684
 685 void Steering::GoTo(const glm::dvec3 &t) noexcept {
 686         target = t;
 687         halting = false;
 688         seeking = false;
 689         arriving = true;
 690 }
 691
 692 glm::dvec3 Steering::Acceleration(const Situation::State &s) const noexcept {
 693         double speed = max_speed * glm::clamp(max_speed * haste * haste, 0.25, 1.0);
 694         double accel = max_speed * glm::clamp(max_accel * haste * haste, 0.5, 1.0);
 695         glm::dvec3 result(0.0);
 696         if (separating) {
 697                 // TODO: off surface situation
 698                 glm::dvec3 repulse(0.0);
 699                 const Situation &s = c.GetSituation();
 700                 for (auto &other : s.GetPlanet().Creatures()) {
 701                         if (&*other == &c) continue;
 702                         glm::dvec3 diff = s.Position() - other->GetSituation().Position();
 703                         if (length2(diff) > max_look * max_look) continue;
 704                         double sep = length(diff) - other->Size() * 0.707 - c.Size() * 0.707;
 705                         if (sep < min_dist) {
 706                                 repulse += normalize(diff) * (1.0 - sep / min_dist);
 707                         }
 708                 }
 709                 SumForce(result, repulse, accel);
 710         }
 711         if (halting) {
 712                 SumForce(result, s.vel * -accel, accel);
 713         }
 714         if (seeking) {
 715                 glm::dvec3 diff = target - s.pos;
 716                 if (!allzero(diff)) {
 717                         SumForce(result, TargetVelocity(s, (normalize(diff) * speed), accel), accel);
 718                 }
 719         }
 720         if (arriving) {
 721                 glm::dvec3 diff = target - s.pos;
 722                 double dist = length(diff);
 723                 if (!allzero(diff) && dist > std::numeric_limits<double>::epsilon()) {
 724                         SumForce(result, TargetVelocity(s, diff * std::min(dist * accel, speed) / dist, accel), accel);
 725                 }
 726         }
 727         return result;
 728 }
 729
 730 bool Steering::SumForce(glm::dvec3 &out, const glm::dvec3 &in, double max) const noexcept {
 731         if (allzero(in) || anynan(in)) {
 732                 return false;
 733         }
 734         double cur = allzero(out) ? 0.0 : length(out);
 735         double rem = max - cur;
 736         if (rem < 0.0) {
 737                 return true;
 738         }
 739         double add = length(in);
 740         if (add > rem) {
 741                 // this method is off if in and out are in different
 742                 // directions, but gives okayish results
 743                 out += in * (1.0 / add);
 744                 return true;
 745         } else {
 746                 out += in;
 747                 return false;
 748         }
 749 }
 750
 751 glm::dvec3 Steering::TargetVelocity(const Situation::State &s, const glm::dvec3 &vel, double acc) const noexcept {
 752         return (vel - s.vel) * acc;
 753 }
 754
 755 }
 756 }