src/ai/Spawner.cpp

   1 #include "Spawner.hpp"
   2
   3 #include "Chaser.hpp"
   4 #include "RandomWalk.hpp"
   5 #include "../app/TextureIndex.hpp"
   6 #include "../model/Model.hpp"
   7 #include "../model/Skeletons.hpp"
   8 #include "../rand/GaloisLFSR.hpp"
   9 #include "../world/BlockLookup.hpp"
  10 #include "../world/BlockType.hpp"
  11 #include "../world/ChunkIndex.hpp"
  12 #include "../world/Entity.hpp"
  13 #include "../world/World.hpp"
  14
  15 #include <iostream>
  16
  17 using namespace std;
  18
  19
  20 namespace blank {
  21
  22 Spawner::Spawner(World &world, Skeletons &skeletons, GaloisLFSR &rand)
  23 : world(world)
  24 , skeletons(skeletons)
  25 , controllers()
  26 , random(rand)
  27 , timer(64)
  28 , despawn_range(128 * 128)
  29 , spawn_distance(16 * 16)
  30 , max_entities(16)
  31 , chunk_range(4)
  32 , skeletons_offset(0)
  33 , skeletons_length(skeletons.size())
  34 , tex_map() {
  35         timer.Start();
  36 }
  37
  38 Spawner::~Spawner() {
  39         for (auto &ctrl : controllers) {
  40                 delete ctrl;
  41         }
  42 }
  43
  44
  45 void Spawner::LimitSkeletons(size_t begin, size_t end) {
  46         if (begin >= skeletons.size() || end > skeletons.size() || begin >= end) {
  47                 cout << "warning, skeleton limit out of bounds or invalid range given" << endl;
  48         } else {
  49                 skeletons_offset = begin;
  50                 skeletons_length = end - begin;
  51         }
  52 }
  53
  54 void Spawner::LoadTextures(TextureIndex &tex_index) {
  55         tex_map.clear();
  56         tex_map.push_back(tex_index.GetID("rock-1"));
  57         tex_map.push_back(tex_index.GetID("rock-face"));
  58 }
  59
  60 void Spawner::Update(int dt) {
  61         CheckDespawn();
  62         timer.Update(dt);
  63         if (timer.Hit()) {
  64                 TrySpawn();
  65         }
  66         for (auto &ctrl : controllers) {
  67                 ctrl->Update(dt);
  68         }
  69 }
  70
  71
  72 void Spawner::CheckDespawn() noexcept {
  73         const auto &refs = world.Players();
  74         for (auto iter = controllers.begin(), end = controllers.end(); iter != end;) {
  75                 Entity &e = (*iter)->Controlled();
  76                 if (e.Dead()) {
  77                         delete *iter;
  78                         iter = controllers.erase(iter);
  79                         end = controllers.end();
  80                         continue;
  81                 }
  82                 bool safe = false;
  83                 for (const Player &ref : refs) {
  84                         glm::vec3 diff(ref.GetEntity().AbsoluteDifference(e));
  85                         if (dot(diff, diff) < despawn_range) {
  86                                 safe = true;
  87                                 break;
  88                         }
  89                 }
  90                 if (!safe) {
  91                         e.Kill();
  92                         delete *iter;
  93                         iter = controllers.erase(iter);
  94                         end = controllers.end();
  95                 } else {
  96                         ++iter;
  97                 }
  98         }
  99 }
 100
 101 void Spawner::TrySpawn() {
 102         if (controllers.size() >= max_entities || skeletons_length == 0) return;
 103
 104         // select random player to punish
 105         auto &players = world.Players();
 106         if (players.size() == 0) return;
 107         size_t player_num = random.Next<unsigned short>() % players.size();
 108         auto i = players.begin(), end = players.end();
 109         for (; player_num > 0 && i != end; ++i, --player_num) {
 110         }
 111         const Player &player = *i;
 112
 113         BlockLookup spawn_block(player.GetChunks().RandomBlock(random));
 114
 115         // distance check
 116         //glm::vec3 diff(glm::vec3(chunk * Chunk::Extent() - pos) + player.entity->Position());
 117         //float dist = dot(diff, diff);
 118         //if (dist > despawn_range || dist < spawn_distance) {
 119         //      return;
 120         //}
 121
 122         // check if the spawn block and the one above it are loaded and inhabitable
 123         if (!spawn_block || spawn_block.GetType().collide_block) {
 124                 return;
 125         }
 126
 127         BlockLookup head_block(spawn_block.Next(Block::FACE_UP));
 128         if (!head_block || head_block.GetType().collide_block) {
 129                 return;
 130         }
 131
 132         Spawn(player.GetEntity(), spawn_block.GetChunk().Position(), spawn_block.GetBlockCoords());
 133 }
 134
 135 void Spawner::Spawn(Entity &reference, const glm::ivec3 &chunk, const glm::vec3 &pos) {
 136         glm::vec3 rot(0.000001f);
 137         rot.x *= (random.Next<unsigned short>() % 1024);
 138         rot.y *= (random.Next<unsigned short>() % 1024);
 139         rot.z *= (random.Next<unsigned short>() % 1024);
 140
 141         Entity &e = world.AddEntity();
 142         e.Position(chunk, pos);
 143         e.Bounds({ { -0.5f, -0.5f, -0.5f }, { 0.5f, 0.5f, 0.5f } });
 144         e.WorldCollidable(true);
 145         RandomSkeleton().Instantiate(e.GetModel());
 146         e.GetModel().SetTextures(tex_map);
 147         e.AngularVelocity(rot);
 148         Controller *ctrl;
 149         if (random()) {
 150                 ctrl = new RandomWalk(e, random.Next<std::uint64_t>());
 151                 e.Name("walker");
 152         } else {
 153                 ctrl = new Chaser(world, e, reference);
 154                 e.Name("chaser");
 155         }
 156         controllers.emplace_back(ctrl);
 157 }
 158
 159 Model &Spawner::RandomSkeleton() noexcept {
 160         std::size_t offset = (random.Next<std::size_t>() % skeletons_length) + skeletons_offset;
 161         return skeletons[offset];
 162 }
 163
 164 }