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[blobs.git] / 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         if (!situation.Moving()) {
326                 // double exhaustion recovery when standing still
327                 stats.Exhaustion().Add(stats.Exhaustion().gain * dt);
328         }
329 }
330
331 void Creature::TickBrain(double dt) {
332         bg_task->Tick(dt);
333         bg_task->Action();
334         memory.Tick(dt);
335         // do background stuff
336         if (goals.empty()) {
337                 return;
338         }
339         for (auto &goal : goals) {
340                 goal->Tick(dt);
341         }
342         // if active goal can be interrupted, check priorities
343         if (goals.size() > 1 && goals[0]->Interruptible()) {
344                 std::sort(goals.begin(), goals.end(), GoalCompare);
345         }
346         goals[0]->Action();
347         for (auto goal = goals.begin(); goal != goals.end();) {
348                 if ((*goal)->Complete()) {
349                         goals.erase(goal);
350                 } else {
351                         ++goal;
352                 }
353         }
354 }
355
356 math::AABB Creature::CollisionBox() const noexcept {
357         return { glm::dvec3(size * -0.5), glm::dvec3(size * 0.5) };
358 }
359
360 glm::dmat4 Creature::CollisionTransform() const noexcept {
361         const double half_size = size * 0.5;
362         const glm::dvec3 &pos = situation.Position();
363         const glm::dmat3 srf(world::Planet::SurfaceOrientation(situation.Surface()));
364         return glm::translate(glm::dvec3(pos.x, pos.y, pos.z + half_size))
365                 * glm::rotate(glm::orientedAngle(-srf[2], situation.Heading(), srf[1]), srf[1])
366                 * glm::dmat4(srf);
367 }
368
369 glm::dmat4 Creature::LocalTransform() noexcept {
370         const double half_size = size * 0.5;
371         return CollisionTransform()
372                 * glm::scale(glm::dvec3(half_size, half_size, half_size));
373 }
374
375 void Creature::BuildVAO() {
376         vao.Bind();
377         vao.BindAttributes();
378         vao.EnableAttribute(0);
379         vao.EnableAttribute(1);
380         vao.EnableAttribute(2);
381         vao.AttributePointer<glm::vec3>(0, false, offsetof(Attributes, position));
382         vao.AttributePointer<glm::vec3>(1, false, offsetof(Attributes, normal));
383         vao.AttributePointer<glm::vec3>(2, false, offsetof(Attributes, texture));
384         vao.ReserveAttributes(6 * 4, GL_STATIC_DRAW);
385         {
386                 auto attrib = vao.MapAttributes(GL_WRITE_ONLY);
387                 const float offset = 1.0f;
388                 for (int surface = 0; surface < 6; ++surface) {
389                         const float tex_u_begin = surface < 3 ? 1.0f : 0.0f;
390                         const float tex_u_end = surface < 3 ? 0.0f : 1.0f;
391
392                         attrib[4 * surface + 0].position[(surface + 0) % 3] = -offset;
393                         attrib[4 * surface + 0].position[(surface + 1) % 3] = -offset;
394                         attrib[4 * surface + 0].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
395                         attrib[4 * surface + 0].normal[(surface + 0) % 3] = 0.0f;
396                         attrib[4 * surface + 0].normal[(surface + 1) % 3] = 0.0f;
397                         attrib[4 * surface + 0].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
398                         attrib[4 * surface + 0].texture.x = tex_u_begin;
399                         attrib[4 * surface + 0].texture.y = 1.0f;
400                         attrib[4 * surface + 0].texture.z = surface;
401
402                         attrib[4 * surface + 1].position[(surface + 0) % 3] = -offset;
403                         attrib[4 * surface + 1].position[(surface + 1) % 3] =  offset;
404                         attrib[4 * surface + 1].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
405                         attrib[4 * surface + 1].normal[(surface + 0) % 3] = 0.0f;
406                         attrib[4 * surface + 1].normal[(surface + 1) % 3] = 0.0f;
407                         attrib[4 * surface + 1].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
408                         attrib[4 * surface + 1].texture.x = tex_u_end;
409                         attrib[4 * surface + 1].texture.y = 1.0f;
410                         attrib[4 * surface + 1].texture.z = surface;
411
412                         attrib[4 * surface + 2].position[(surface + 0) % 3] =  offset;
413                         attrib[4 * surface + 2].position[(surface + 1) % 3] = -offset;
414                         attrib[4 * surface + 2].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
415                         attrib[4 * surface + 2].normal[(surface + 0) % 3] = 0.0f;
416                         attrib[4 * surface + 2].normal[(surface + 1) % 3] = 0.0f;
417                         attrib[4 * surface + 2].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
418                         attrib[4 * surface + 2].texture.x = tex_u_begin;
419                         attrib[4 * surface + 2].texture.y = 0.0f;
420                         attrib[4 * surface + 2].texture.z = surface;
421
422                         attrib[4 * surface + 3].position[(surface + 0) % 3] = offset;
423                         attrib[4 * surface + 3].position[(surface + 1) % 3] = offset;
424                         attrib[4 * surface + 3].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
425                         attrib[4 * surface + 3].normal[(surface + 0) % 3] = 0.0f;
426                         attrib[4 * surface + 3].normal[(surface + 1) % 3] = 0.0f;
427                         attrib[4 * surface + 3].normal[(surface + 2) % 3] = surface < 3 ? 1.0f : -1.0f;
428                         attrib[4 * surface + 3].texture.x = tex_u_end;
429                         attrib[4 * surface + 3].texture.y = 0.0f;
430                         attrib[4 * surface + 3].texture.z = surface;
431                 }
432         }
433         vao.BindElements();
434         vao.ReserveElements(6 * 6, GL_STATIC_DRAW);
435         {
436                 auto element = vao.MapElements(GL_WRITE_ONLY);
437                 for (int surface = 0; surface < 3; ++surface) {
438                         element[6 * surface + 0] = 4 * surface + 0;
439                         element[6 * surface + 1] = 4 * surface + 2;
440                         element[6 * surface + 2] = 4 * surface + 1;
441                         element[6 * surface + 3] = 4 * surface + 1;
442                         element[6 * surface + 4] = 4 * surface + 2;
443                         element[6 * surface + 5] = 4 * surface + 3;
444                 }
445                 for (int surface = 3; surface < 6; ++surface) {
446                         element[6 * surface + 0] = 4 * surface + 0;
447                         element[6 * surface + 1] = 4 * surface + 1;
448                         element[6 * surface + 2] = 4 * surface + 2;
449                         element[6 * surface + 3] = 4 * surface + 2;
450                         element[6 * surface + 4] = 4 * surface + 1;
451                         element[6 * surface + 5] = 4 * surface + 3;
452                 }
453         }
454         vao.Unbind();
455 }
456
457 void Creature::Draw(graphics::Viewport &viewport) {
458         vao.Bind();
459         vao.DrawTriangles(6 * 6);
460 }
461
462
463 void Spawn(Creature &c, world::Planet &p) {
464         p.AddCreature(&c);
465         c.GetSituation().SetPlanetSurface(p, 0, p.TileCenter(0, p.SideLength() / 2, p.SideLength() / 2));
466         c.GetSituation().Heading(-world::Planet::SurfaceOrientation(0)[2]);
467
468         // probe surrounding area for common resources
469         int start = p.SideLength() / 2 - 2;
470         int end = start + 5;
471         std::map<int, double> yields;
472         for (int y = start; y < end; ++y) {
473                 for (int x = start; x < end; ++x) {
474                         const world::TileType &t = p.TypeAt(0, x, y);
475                         for (auto yield : t.resources) {
476                                 yields[yield.resource] += yield.ubiquity;
477                         }
478                 }
479         }
480         int liquid = -1;
481         int solid = -1;
482         for (auto e : yields) {
483                 if (c.GetSimulation().Resources()[e.first].state == world::Resource::LIQUID) {
484                         if (liquid < 0 || e.second > yields[liquid]) {
485                                 liquid = e.first;
486                         }
487                 } else if (c.GetSimulation().Resources()[e.first].state == world::Resource::SOLID) {
488                         if (solid < 0 || e.second > yields[solid]) {
489                                 solid = e.first;
490                         }
491                 }
492         }
493
494         Genome genome;
495         genome.properties.Strength() = { 2.0, 0.1 };
496         genome.properties.Stamina() = { 2.0, 0.1 };
497         genome.properties.Dexerty() = { 2.0, 0.1 };
498         genome.properties.Intelligence() = { 1.0, 0.1 };
499         genome.properties.Lifetime() = { 480.0, 60.0 };
500         genome.properties.Fertility() = { 0.5, 0.03 };
501         genome.properties.Mutability() = { 1.0, 0.1 };
502         genome.properties.OffspringMass() = { 0.3, 0.02 };
503
504         glm::dvec3 color_avg(0.0);
505         double color_divisor = 0.0;
506
507         if (p.HasAtmosphere()) {
508                 c.AddMass(p.Atmosphere(), 0.01);
509                 color_avg += c.GetSimulation().Resources()[p.Atmosphere()].base_color * 0.1;
510                 color_divisor += 0.1;
511         }
512         if (liquid > -1) {
513                 c.AddMass(liquid, 0.3);
514                 color_avg += c.GetSimulation().Resources()[liquid].base_color * 0.5;
515                 color_divisor += 0.5;
516         }
517         if (solid > -1) {
518                 c.AddMass(solid, 0.1);
519                 color_avg += c.GetSimulation().Resources()[solid].base_color;
520                 color_divisor += 1.0;
521         }
522
523         if (color_divisor > 0.001) {
524                 color_avg /= color_divisor;
525         }
526         glm::dvec3 hsl = rgb2hsl(color_avg);
527         genome.base_hue = { hsl.x, 0.01 };
528         genome.base_saturation = { hsl.y, 0.01 };
529         genome.base_lightness = { hsl.z, 0.01 };
530
531         genome.Configure(c);
532 }
533
534 void Genome::Configure(Creature &c) const {
535         c.GetGenome() = *this;
536
537         math::GaloisLFSR &random = c.GetSimulation().Assets().random;
538
539         c.GetProperties() = Instantiate(properties, random);
540
541         // TODO: derive stats from properties
542         c.GetStats().Damage().gain = (-1.0 / 100.0);
543         c.GetStats().Breath().gain = (1.0 / 5.0);
544         c.GetStats().Thirst().gain = (1.0 / 60.0);
545         c.GetStats().Hunger().gain = (1.0 / 200.0);
546         c.GetStats().Exhaustion().gain = (-1.0 / 100.0);
547         c.GetStats().Fatigue().gain = (-1.0 / 100.0);
548         c.GetStats().Boredom().gain = (1.0 / 300.0);
549
550         glm::dvec3 base_color(
551                 std::fmod(base_hue.FakeNormal(random.SNorm()) + 1.0, 1.0),
552                 glm::clamp(base_saturation.FakeNormal(random.SNorm()), 0.0, 1.0),
553                 glm::clamp(base_lightness.FakeNormal(random.SNorm()), 0.0, 1.0)
554         );
555         glm::dvec3 highlight_color(
556                 std::fmod(base_color.x + 0.5, 1.0),
557                 1.0 - base_color.y,
558                 1.0 - base_color.z
559         );
560         c.BaseColor(hsl2rgb(base_color));
561         c.HighlightColor(hsl2rgb(highlight_color));
562         c.SetBackgroundTask(std::unique_ptr<Goal>(new BlobBackgroundTask(c)));
563         c.AddGoal(std::unique_ptr<Goal>(new IdleGoal(c)));
564 }
565
566
567 void Split(Creature &c) {
568         Creature *a = new Creature(c.GetSimulation());
569         const Situation &s = c.GetSituation();
570         a->Name(c.GetSimulation().Assets().name.Sequential());
571         c.GetGenome().Configure(*a);
572         for (const auto &cmp : c.GetComposition()) {
573                 a->AddMass(cmp.resource, cmp.value * 0.5);
574         }
575         s.GetPlanet().AddCreature(a);
576         // TODO: duplicate situation somehow
577         a->GetSituation().SetPlanetSurface(
578                 s.GetPlanet(), s.Surface(),
579                 s.Position() + glm::dvec3(0.0, a->Size() + 0.1, 0.0));
580         a->BuildVAO();
581         std::cout << "[" << int(c.GetSimulation().Time()) << "s] "
582                 << a->Name() << " was born" << std::endl;
583
584         Creature *b = new Creature(c.GetSimulation());
585         b->Name(c.GetSimulation().Assets().name.Sequential());
586         c.GetGenome().Configure(*b);
587         for (const auto &cmp : c.GetComposition()) {
588                 b->AddMass(cmp.resource, cmp.value * 0.5);
589         }
590         s.GetPlanet().AddCreature(b);
591         b->GetSituation().SetPlanetSurface(
592                 s.GetPlanet(), s.Surface(),
593                 s.Position() + glm::dvec3(0.0, b->Size() - 0.1, 0.0));
594         b->BuildVAO();
595         std::cout << "[" << int(c.GetSimulation().Time()) << "s] "
596                 << b->Name() << " was born" << std::endl;
597
598         c.Die();
599 }
600
601
602 Memory::Memory(Creature &c)
603 : c(c) {
604 }
605
606 Memory::~Memory() {
607 }
608
609 void Memory::Tick(double dt) {
610         Situation &s = c.GetSituation();
611         if (s.OnTile()) {
612                 TrackStay({ &s.GetPlanet(), s.Surface(), s.SurfacePosition() }, dt);
613         }
614 }
615
616 void Memory::TrackStay(const Location &l, double t) {
617         const world::TileType &type = l.planet->TypeAt(l.surface, l.coords.x, l.coords.y);
618         auto entry = known_types.find(type.id);
619         if (entry != known_types.end()) {
620                 if (c.GetSimulation().Time() - entry->second.last_been > c.GetProperties().Lifetime() * 0.1) {
621                         // "it's been ages"
622                         if (entry->second.time_spent > c.Age() * 0.25) {
623                                 // the place is very familiar
624                                 c.GetStats().Boredom().Add(-0.2);
625                         } else {
626                                 // infrequent stays
627                                 c.GetStats().Boredom().Add(-0.1);
628                         }
629                 }
630                 entry->second.last_been = c.GetSimulation().Time();
631                 entry->second.last_loc = l;
632                 entry->second.time_spent += t;
633         } else {
634                 known_types.emplace(type.id, Stay{
635                         c.GetSimulation().Time(),
636                         l,
637                         c.GetSimulation().Time(),
638                         l,
639                         t
640                 });
641                 // completely new place, interesting
642                 // TODO: scale by personality trait
643                 c.GetStats().Boredom().Add(-0.25);
644         }
645 }
646
647
648 NameGenerator::NameGenerator()
649 : counter(0) {
650 }
651
652 NameGenerator::~NameGenerator() {
653 }
654
655 std::string NameGenerator::Sequential() {
656         std::stringstream ss;
657         ss << "Blob " << ++counter;
658         return ss.str();
659 }
660
661
662 Situation::Situation()
663 : planet(nullptr)
664 , state(glm::dvec3(0.0), glm::dvec3(0.0))
665 , surface(0)
666 , type(LOST) {
667 }
668
669 Situation::~Situation() {
670 }
671
672 bool Situation::OnPlanet() const noexcept {
673         return type == PLANET_SURFACE;
674 }
675
676 bool Situation::OnSurface() const noexcept {
677         return type == PLANET_SURFACE;
678 }
679
680 bool Situation::OnTile() const noexcept {
681         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
682         return type == PLANET_SURFACE
683                 && t.x >= 0 && t.x < planet->SideLength()
684                 && t.y >= 0 && t.y < planet->SideLength();
685 }
686
687 glm::ivec2 Situation::SurfacePosition() const noexcept {
688         return planet->SurfacePosition(surface, state.pos);
689 }
690
691 world::Tile &Situation::GetTile() const noexcept {
692         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
693         return planet->TileAt(surface, t.x, t.y);
694 }
695
696 const world::TileType &Situation::GetTileType() const noexcept {
697         glm::ivec2 t(planet->SurfacePosition(surface, state.pos));
698         return planet->TypeAt(surface, t.x, t.y);
699 }
700
701 void Situation::Move(const glm::dvec3 &dp) noexcept {
702         state.pos += dp;
703         if (OnSurface()) {
704                 // enforce ground constraint
705                 if (Surface() < 3) {
706                         state.pos[(Surface() + 2) % 3] = std::max(0.0, state.pos[(Surface() + 2) % 3]);
707                 } else {
708                         state.pos[(Surface() + 2) % 3] = std::min(0.0, state.pos[(Surface() + 2) % 3]);
709                 }
710         }
711 }
712
713 void Situation::SetPlanetSurface(world::Planet &p, int srf, const glm::dvec3 &pos) noexcept {
714         type = PLANET_SURFACE;
715         planet = &p;
716         surface = srf;
717         state.pos = pos;
718 }
719
720
721 Steering::Steering(const Creature &c)
722 : c(c)
723 , target(0.0)
724 , haste(0.0)
725 , max_force(1.0)
726 , max_speed(1.0)
727 , min_dist(0.0)
728 , max_look(0.0)
729 , separating(false)
730 , halting(true)
731 , seeking(false)
732 , arriving(false) {
733 }
734
735 Steering::~Steering() {
736 }
737
738 void Steering::Separate(double min_distance, double max_lookaround) noexcept {
739         separating = true;
740         min_dist = min_distance;
741         max_look = max_lookaround;
742 }
743
744 void Steering::DontSeparate() noexcept {
745         separating = false;
746 }
747
748 void Steering::ResumeSeparate() noexcept {
749         separating = false;
750 }
751
752 void Steering::Halt() noexcept {
753         halting = true;
754         seeking = false;
755         arriving = false;
756 }
757
758 void Steering::Pass(const glm::dvec3 &t) noexcept {
759         target = t;
760         halting = false;
761         seeking = true;
762         arriving = false;
763 }
764
765 void Steering::GoTo(const glm::dvec3 &t) noexcept {
766         target = t;
767         halting = false;
768         seeking = false;
769         arriving = true;
770 }
771
772 glm::dvec3 Steering::Force(const Situation::State &s) const noexcept {
773         double speed = max_speed * glm::clamp(max_speed * haste * haste, 0.25, 1.0);
774         double force = max_speed * glm::clamp(max_force * haste * haste, 0.5, 1.0);
775         glm::dvec3 result(0.0);
776         if (separating) {
777                 // TODO: off surface situation
778                 glm::dvec3 repulse(0.0);
779                 const Situation &s = c.GetSituation();
780                 for (auto &other : s.GetPlanet().Creatures()) {
781                         if (&*other == &c) continue;
782                         glm::dvec3 diff = s.Position() - other->GetSituation().Position();
783                         if (length2(diff) > max_look * max_look) continue;
784                         double sep = length(diff) - other->Size() * 0.707 - c.Size() * 0.707;
785                         if (sep < min_dist) {
786                                 repulse += normalize(diff) * (1.0 - sep / min_dist);
787                         }
788                 }
789                 SumForce(result, repulse, force);
790         }
791         if (halting) {
792                 SumForce(result, s.vel * -force, force);
793         }
794         if (seeking) {
795                 glm::dvec3 diff = target - s.pos;
796                 if (!allzero(diff)) {
797                         SumForce(result, TargetVelocity(s, (normalize(diff) * speed), force), force);
798                 }
799         }
800         if (arriving) {
801                 glm::dvec3 diff = target - s.pos;
802                 double dist = length(diff);
803                 if (!allzero(diff) && dist > std::numeric_limits<double>::epsilon()) {
804                         SumForce(result, TargetVelocity(s, diff * std::min(dist * force, speed) / dist, force), force);
805                 }
806         }
807         return result;
808 }
809
810 bool Steering::SumForce(glm::dvec3 &out, const glm::dvec3 &in, double max) const noexcept {
811         if (allzero(in) || anynan(in)) {
812                 return false;
813         }
814         double cur = allzero(out) ? 0.0 : length(out);
815         double rem = max - cur;
816         if (rem < 0.0) {
817                 return true;
818         }
819         double add = length(in);
820         if (add > rem) {
821                 // this method is off if in and out are in different
822                 // directions, but gives okayish results
823                 out += in * (1.0 / add);
824                 return true;
825         } else {
826                 out += in;
827                 return false;
828         }
829 }
830
831 glm::dvec3 Steering::TargetVelocity(const Situation::State &s, const glm::dvec3 &vel, double acc) const noexcept {
832         return (vel - s.vel) * acc;
833 }
834
835 }
836 }