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()
  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(0)
  15 , chunks(blockType, generate)
  16 , player() {
  17         blockType.Add(BlockType{ true, { 1.0f, 1.0f, 1.0f }, &blockShape }); // white block
  18         blockType.Add(BlockType{ true, { 1.0f, 1.0f, 1.0f }, &stairShape }); // white stair
  19         blockType.Add(BlockType{ true, { 1.0f, 1.0f, 1.0f }, &slabShape }); // white slab
  20         blockType.Add(BlockType{ true, { 1.0f, 0.0f, 0.0f }, &blockShape }); // red block
  21         blockType.Add(BlockType{ true, { 1.0f, 0.0f, 0.0f }, &stairShape }); // red stair
  22         blockType.Add(BlockType{ true, { 1.0f, 0.0f, 0.0f }, &slabShape }); // red slab
  23         blockType.Add(BlockType{ true, { 0.0f, 1.0f, 0.0f }, &blockShape }); // green block
  24         blockType.Add(BlockType{ true, { 0.0f, 1.0f, 0.0f }, &stairShape }); // green stair
  25         blockType.Add(BlockType{ true, { 0.0f, 1.0f, 0.0f }, &slabShape }); // green slab
  26         blockType.Add(BlockType{ true, { 0.0f, 0.0f, 1.0f }, &blockShape }); // blue block
  27         blockType.Add(BlockType{ true, { 0.0f, 0.0f, 1.0f }, &stairShape }); // blue stair
  28         blockType.Add(BlockType{ true, { 0.0f, 0.0f, 1.0f }, &slabShape }); // blue slab
  29
  30         generate.Solids({ 1, 4, 7, 10 });
  31
  32         player.Position({ 4.0f, 4.0f, 4.0f });
  33
  34         chunks.Generate({ -4, -4, -4 }, { 5, 5, 5});
  35 }
  36
  37
  38 bool World::Intersection(
  39                 const Ray &ray,
  40                 const glm::mat4 &M,
  41                 Chunk **chunk,
  42                 int *blkid,
  43                 float *dist,
  44                 glm::vec3 *normal) {
  45         Chunk *closest_chunk = nullptr;
  46         int closest_blkid = -1;
  47         float closest_dist = std::numeric_limits<float>::infinity();
  48         glm::vec3 closest_normal;
  49
  50         for (Chunk &cur_chunk : chunks.Loaded()) {
  51                 int cur_blkid;
  52                 float cur_dist;
  53                 glm::vec3 cur_normal;
  54                 if (cur_chunk.Intersection(ray, M * cur_chunk.Transform(player.ChunkCoords()), &cur_blkid, &cur_dist, &cur_normal)) {
  55                         if (cur_dist < closest_dist) {
  56                                 closest_chunk = &cur_chunk;
  57                                 closest_blkid = cur_blkid;
  58                                 closest_dist = cur_dist;
  59                                 closest_normal = cur_normal;
  60                         }
  61                 }
  62         }
  63
  64         if (chunk) {
  65                 *chunk = closest_chunk;
  66         }
  67         if (blkid) {
  68                 *blkid = closest_blkid;
  69         }
  70         if (dist) {
  71                 *dist = closest_dist;
  72         }
  73         if (normal) {
  74                 *normal = closest_normal;
  75         }
  76         return closest_chunk;
  77 }
  78
  79
  80 Chunk &World::Next(const Chunk &to, const glm::tvec3<int> &dir) {
  81         const Chunk::Pos tgt_pos = to.Position() + dir;
  82         return chunks.ForceLoad(tgt_pos);
  83 }
  84
  85
  86 void World::Update(int dt) {
  87         player.Update(dt);
  88         chunks.Rebase(player.ChunkCoords());
  89         chunks.Update();
  90 }
  91
  92
  93 void World::Render(DirectionalLighting &program) {
  94         program.SetLightDirection({ -1.0f, -3.0f, -2.0f });
  95         program.SetView(glm::inverse(player.Transform(player.ChunkCoords())));
  96
  97         for (Chunk &chunk : chunks.Loaded()) {
  98                 glm::mat4 m(chunk.Transform(player.ChunkCoords()));
  99                 program.SetM(m);
 100                 glm::mat4 mvp(program.GetVP() * m);
 101                 if (!CullTest(Chunk::Bounds(), mvp)) {
 102                         chunk.Draw();
 103                 }
 104         }
 105 }
 106
 107 }