src/world.cpp

   1 #include "world.hpp"
   2
   3 #include <limits>
   4 #include <glm/gtx/transform.hpp>
   5
   6
   7 namespace blank {
   8
   9 World::World(const Config &config)
  10 : blockType()
  11 , blockShape({{ -0.5f, -0.5f, -0.5f }, { 0.5f, 0.5f, 0.5f }})
  12 , stairShape({{ -0.5f, -0.5f, -0.5f }, { 0.5f, 0.5f, 0.5f }}, { 0.0f, 0.0f })
  13 , slabShape({{ -0.5f, -0.5f, -0.5f }, { 0.5f, 0.0f, 0.5f }})
  14 , generate(config.gen)
  15 , chunks(config.load, blockType, generate)
  16 , player()
  17 , entities()
  18 , light_direction(config.light_direction)
  19 , fog_density(config.fog_density) {
  20         BlockType::Faces block_fill = {  true,  true,  true,  true,  true,  true };
  21         BlockType::Faces slab_fill  = { false,  true, false, false, false, false };
  22         BlockType::Faces stair_fill = { false,  true, false, false, false,  true };
  23
  24         { // white block
  25                 BlockType type(true, { 1.0f, 1.0f, 1.0f }, &blockShape);
  26                 type.block_light = true;
  27                 type.fill = block_fill;
  28                 blockType.Add(type);
  29         }
  30         { // white slab
  31                 BlockType type(true, { 1.0f, 1.0f, 1.0f }, &slabShape);
  32                 type.block_light = true;
  33                 type.fill = slab_fill;
  34                 blockType.Add(type);
  35         }
  36         { // white stair
  37                 BlockType type(true, { 1.0f, 1.0f, 1.0f }, &stairShape);
  38                 type.block_light = true;
  39                 type.fill = stair_fill;
  40                 blockType.Add(type);
  41         }
  42
  43         { // red block
  44                 BlockType type(true, { 1.0f, 0.0f, 0.0f }, &blockShape);
  45                 type.block_light = true;
  46                 type.fill = block_fill;
  47                 blockType.Add(type);
  48         }
  49         { // red slab
  50                 BlockType type(true, { 1.0f, 0.0f, 0.0f }, &slabShape);
  51                 type.block_light = true;
  52                 type.fill = slab_fill;
  53                 blockType.Add(type);
  54         }
  55         { // red stair
  56                 BlockType type(true, { 1.0f, 0.0f, 0.0f }, &stairShape);
  57                 type.block_light = true;
  58                 type.fill = stair_fill;
  59                 blockType.Add(type);
  60         }
  61
  62         { // green block
  63                 BlockType type(true, { 0.0f, 1.0f, 0.0f }, &blockShape);
  64                 type.block_light = true;
  65                 type.fill = block_fill;
  66                 blockType.Add(type);
  67         }
  68         { // green slab
  69                 BlockType type(true, { 0.0f, 1.0f, 0.0f }, &slabShape);
  70                 type.block_light = true;
  71                 type.fill = slab_fill;
  72                 blockType.Add(type);
  73         }
  74         { // green stair
  75                 BlockType type(true, { 0.0f, 1.0f, 0.0f }, &stairShape);
  76                 type.block_light = true;
  77                 type.fill = stair_fill;
  78                 blockType.Add(type);
  79         }
  80
  81         { // blue block
  82                 BlockType type(true, { 0.0f, 0.0f, 1.0f }, &blockShape);
  83                 type.block_light = true;
  84                 type.fill = block_fill;
  85                 blockType.Add(type);
  86         }
  87         { // blue slab
  88                 BlockType type(true, { 0.0f, 0.0f, 1.0f }, &slabShape);
  89                 type.block_light = true;
  90                 type.fill = slab_fill;
  91                 blockType.Add(type);
  92         }
  93         { // blue stair
  94                 BlockType type(true, { 0.0f, 0.0f, 1.0f }, &stairShape);
  95                 type.block_light = true;
  96                 type.fill = stair_fill;
  97                 blockType.Add(type);
  98         }
  99
 100         { // glowing yellow block
 101                 BlockType type(true, { 1.0f, 1.0f, 0.0f }, &blockShape);
 102                 type.luminosity = 15;
 103                 type.block_light = true;
 104                 type.fill = block_fill;
 105                 blockType.Add(type);
 106         }
 107
 108         generate.Space(0);
 109         generate.Light(13);
 110         generate.Solids({ 1, 4, 7, 10 });
 111
 112         player = &AddEntity();
 113         player->Position(config.spawn);
 114
 115         chunks.GenerateSurrounding(player->ChunkCoords());
 116 }
 117
 118
 119 namespace {
 120
 121 struct Candidate {
 122         Chunk *chunk;
 123         float dist;
 124 };
 125
 126 std::vector<Candidate> candidates;
 127
 128 }
 129
 130 bool World::Intersection(
 131                 const Ray &ray,
 132                 const glm::mat4 &M,
 133                 Chunk **chunk,
 134                 int *blkid,
 135                 float *dist,
 136                 glm::vec3 *normal) {
 137         candidates.clear();
 138
 139         for (Chunk &cur_chunk : chunks.Loaded()) {
 140                 float cur_dist;
 141                 if (cur_chunk.Intersection(ray, M * cur_chunk.Transform(player->ChunkCoords()), cur_dist)) {
 142                         candidates.push_back({ &cur_chunk, cur_dist });
 143                 }
 144         }
 145
 146         if (candidates.empty()) return false;
 147
 148         Chunk *closest_chunk = nullptr;
 149         float closest_dist = std::numeric_limits<float>::infinity();
 150         int closest_blkid = -1;
 151         glm::vec3 closest_normal;
 152
 153         for (Candidate &cand : candidates) {
 154                 if (cand.dist > closest_dist) continue;
 155                 int cur_blkid;
 156                 float cur_dist;
 157                 glm::vec3 cur_normal;
 158                 if (cand.chunk->Intersection(ray, M * cand.chunk->Transform(player->ChunkCoords()), cur_blkid, cur_dist, cur_normal)) {
 159                         if (cur_dist < closest_dist) {
 160                                 closest_chunk = cand.chunk;
 161                                 closest_blkid = cur_blkid;
 162                                 closest_dist = cur_dist;
 163                                 closest_normal = cur_normal;
 164                         }
 165                 }
 166         }
 167
 168         if (chunk) {
 169                 *chunk = closest_chunk;
 170         }
 171         if (blkid) {
 172                 *blkid = closest_blkid;
 173         }
 174         if (dist) {
 175                 *dist = closest_dist;
 176         }
 177         if (normal) {
 178                 *normal = closest_normal;
 179         }
 180         return closest_chunk;
 181 }
 182
 183
 184 Chunk &World::PlayerChunk() {
 185         return chunks.ForceLoad(player->ChunkCoords());
 186 }
 187
 188 Chunk &World::Next(const Chunk &to, const glm::tvec3<int> &dir) {
 189         const Chunk::Pos tgt_pos = to.Position() + dir;
 190         return chunks.ForceLoad(tgt_pos);
 191 }
 192
 193
 194 void World::Update(int dt) {
 195         for (Entity &entity : entities) {
 196                 entity.Update(dt);
 197         }
 198         chunks.Rebase(player->ChunkCoords());
 199         chunks.Update();
 200 }
 201
 202
 203 void World::Render(BlockLighting &chunk_prog, DirectionalLighting &entity_prog) {
 204         chunk_prog.Activate();
 205         chunk_prog.SetFogDensity(fog_density);
 206         chunk_prog.SetView(glm::inverse(player->Transform(player->ChunkCoords())));
 207
 208         for (Chunk &chunk : chunks.Loaded()) {
 209                 glm::mat4 m(chunk.Transform(player->ChunkCoords()));
 210                 chunk_prog.SetM(m);
 211                 glm::mat4 mvp(chunk_prog.GetVP() * m);
 212                 if (!CullTest(Chunk::Bounds(), mvp)) {
 213                         chunk.Draw();
 214                 }
 215         }
 216
 217         entity_prog.Activate();
 218         entity_prog.SetLightDirection(light_direction);
 219         entity_prog.SetFogDensity(fog_density);
 220         entity_prog.SetView(glm::inverse(player->Transform(player->ChunkCoords())));
 221
 222         for (Entity &entity : entities) {
 223                 if (entity.HasShape()) {
 224                         entity_prog.SetM(entity.Transform(player->ChunkCoords()));
 225                         entity.Draw();
 226                 }
 227         }
 228 }
 229
 230 }