src/ai/Spawner.cpp

   1 #include "Spawner.hpp"
   2
   3 #include "Chaser.hpp"
   4 #include "RandomWalk.hpp"
   5 #include "../model/CompositeModel.hpp"
   6 #include "../model/Skeletons.hpp"
   7 #include "../world/BlockLookup.hpp"
   8 #include "../world/BlockType.hpp"
   9 #include "../world/ChunkIndex.hpp"
  10 #include "../world/Entity.hpp"
  11 #include "../world/World.hpp"
  12
  13 #include <iostream>
  14
  15 using namespace std;
  16
  17
  18 namespace blank {
  19
  20 Spawner::Spawner(World &world, Skeletons &skeletons, uint64_t seed)
  21 : world(world)
  22 , skeletons(skeletons)
  23 , controllers()
  24 , random(seed)
  25 , timer(64)
  26 , despawn_range(128 * 128)
  27 , spawn_distance(16 * 16)
  28 , max_entities(16)
  29 , chunk_range(4)
  30 , skeletons_offset(0)
  31 , skeletons_length(skeletons.Size()) {
  32         timer.Start();
  33 }
  34
  35 Spawner::~Spawner() {
  36         for (auto &ctrl : controllers) {
  37                 delete ctrl;
  38         }
  39 }
  40
  41
  42 void Spawner::LimitSkeletons(size_t begin, size_t end) {
  43         if (begin >= skeletons.Size() || end > skeletons.Size() || begin >= end) {
  44                 cout << "warning, skeleton limit out of bounds or invalid range given" << endl;
  45         } else {
  46                 skeletons_offset = begin;
  47                 skeletons_length = end - begin;
  48         }
  49 }
  50
  51 void Spawner::Update(int dt) {
  52         CheckDespawn();
  53         timer.Update(dt);
  54         if (timer.Hit()) {
  55                 TrySpawn();
  56         }
  57         for (auto &ctrl : controllers) {
  58                 ctrl->Update(dt);
  59         }
  60 }
  61
  62
  63 void Spawner::CheckDespawn() noexcept {
  64         const auto &refs = world.Players();
  65         for (auto iter = controllers.begin(), end = controllers.end(); iter != end;) {
  66                 Entity &e = (*iter)->Controlled();
  67                 if (e.Dead()) {
  68                         delete *iter;
  69                         iter = controllers.erase(iter);
  70                         end = controllers.end();
  71                         continue;
  72                 }
  73                 bool safe = false;
  74                 for (const Player &ref : refs) {
  75                         glm::vec3 diff(ref.entity->AbsoluteDifference(e));
  76                         if (dot(diff, diff) < despawn_range) {
  77                                 safe = true;
  78                                 break;
  79                         }
  80                 }
  81                 if (!safe) {
  82                         e.Kill();
  83                         delete *iter;
  84                         iter = controllers.erase(iter);
  85                         end = controllers.end();
  86                 } else {
  87                         ++iter;
  88                 }
  89         }
  90 }
  91
  92 void Spawner::TrySpawn() {
  93         if (controllers.size() >= max_entities || skeletons_length == 0) return;
  94
  95         // select random player to punish
  96         auto &players = world.Players();
  97         if (players.size() == 0) return;
  98         const Player &player = players[random.Next<unsigned short>() % players.size()];
  99
 100         int index = random.Next<unsigned int>() % player.chunks->TotalChunks();
 101
 102         glm::ivec3 chunk(player.chunks->PositionOf(index));
 103
 104         glm::ivec3 pos(
 105                 random.Next<unsigned char>() % Chunk::width,
 106                 random.Next<unsigned char>() % Chunk::height,
 107                 random.Next<unsigned char>() % Chunk::depth
 108         );
 109
 110         // distance check
 111         //glm::vec3 diff(glm::vec3(chunk * Chunk::Extent() - pos) + player.entity->Position());
 112         //float dist = dot(diff, diff);
 113         //if (dist > despawn_range || dist < spawn_distance) {
 114         //      return;
 115         //}
 116
 117         // check if the spawn block and the one above it are loaded and inhabitable
 118         BlockLookup spawn_block((*player.chunks)[index], pos);
 119         if (!spawn_block || spawn_block.GetType().collide_block) {
 120                 return;
 121         }
 122
 123         BlockLookup head_block(spawn_block.Next(Block::FACE_UP));
 124         if (!head_block || head_block.GetType().collide_block) {
 125                 return;
 126         }
 127
 128         Spawn(*player.entity, chunk, glm::vec3(pos) + glm::vec3(0.5f));
 129 }
 130
 131 void Spawner::Spawn(Entity &reference, const glm::ivec3 &chunk, const glm::vec3 &pos) {
 132         glm::vec3 rot(0.000001f);
 133         rot.x *= (random.Next<unsigned short>() % 1024);
 134         rot.y *= (random.Next<unsigned short>() % 1024);
 135         rot.z *= (random.Next<unsigned short>() % 1024);
 136
 137         Entity &e = world.AddEntity();
 138         e.Position(chunk, pos);
 139         e.Bounds({ { -0.5f, -0.5f, -0.5f }, { 0.5f, 0.5f, 0.5f } });
 140         e.WorldCollidable(true);
 141         RandomSkeleton().Instantiate(e.GetModel());
 142         e.AngularVelocity(rot);
 143         Controller *ctrl;
 144         if (random()) {
 145                 ctrl = new RandomWalk(e, random.Next<std::uint64_t>());
 146                 e.Name("walker");
 147         } else {
 148                 ctrl = new Chaser(world, e, reference);
 149                 e.Name("chaser");
 150         }
 151         controllers.emplace_back(ctrl);
 152 }
 153
 154 CompositeModel &Spawner::RandomSkeleton() noexcept {
 155         std::size_t offset = (random.Next<std::size_t>() % skeletons_length) + skeletons_offset;
 156         return skeletons[offset];
 157 }
 158
 159 }