src/world/Generator.hpp

   1 #ifndef BLANK_WORLD_GENERATOR_HPP_
   2 #define BLANK_WORLD_GENERATOR_HPP_
   3
   4 #include "../rand/SimplexNoise.hpp"
   5
   6 #include <cstdint>
   7 #include <vector>
   8 #include <glm/glm.hpp>
   9
  10
  11 namespace blank {
  12
  13 class Block;
  14 class BlockType;
  15 class BlockTypeRegistry;
  16 class Chunk;
  17
  18 class Generator {
  19
  20 public:
  21         struct Config {
  22                 std::uint64_t seed = 0;
  23                 struct NoiseParam {
  24                         std::uint64_t seed_mask;
  25                         int octaves;
  26                         float persistence;
  27                         float frequency;
  28                         float amplitude;
  29                         float growth;
  30                 };
  31                 NoiseParam solidity = { 0xA85033F6BCBDD110, 3, 0.5f, 1.0f/64.0f, 2.0f, 2.0f };
  32                 NoiseParam humidity = { 0x3A463FB24B04A901, 2, 0.5f, 1.0f/512.0f, 2.0f, 2.0f };
  33                 NoiseParam temperature = { 0x2530BA6C6134A9FB, 2, 0.5f, 1.0f/1024.0f, 2.0f, 2.0f };
  34                 NoiseParam richness = { 0x95A179F180103446, 3, 0.5f, 1.0f/128.0f, 2.0f, 2.0f };
  35                 NoiseParam randomness = { 0x074453EEE1496390, 3, 0.5f, 1.0f/16.0f, 2.0f, 2.0f };
  36         };
  37
  38         explicit Generator(const Config &) noexcept;
  39
  40         void LoadTypes(const BlockTypeRegistry &);
  41
  42         void operator ()(Chunk &) const noexcept;
  43
  44 private:
  45         Block Generate(const glm::vec3 &position) const noexcept;
  46         static float GetValue(
  47                 const SimplexNoise &,
  48                 const glm::vec3 &,
  49                 const Config::NoiseParam &) noexcept;
  50
  51 private:
  52         const Config &config;
  53         std::vector<const BlockType *> types;
  54         float min_solidity;
  55
  56         SimplexNoise solidity_noise;
  57         SimplexNoise humidity_noise;
  58         SimplexNoise temperature_noise;
  59         SimplexNoise richness_noise;
  60         SimplexNoise random_noise;
  61
  62 };
  63
  64 }
  65
  66 #endif