src/generator.cpp

   1 #include "generator.hpp"
   2
   3 #include <glm/glm.hpp>
   4
   5
   6 namespace blank {
   7
   8 Generator::Generator(unsigned int seed)
   9 : solidNoise(seed)
  10 , typeNoise(seed + 1)
  11 , stretch(64.0f)
  12 , solid_threshold(0.8f)
  13 , space(0)
  14 , solids() {
  15
  16 }
  17
  18
  19 void Generator::operator ()(Chunk &chunk) const {
  20         chunk.Allocate();
  21         Chunk::Pos pos(chunk.Position());
  22         glm::vec3 coords(pos * Chunk::Extent());
  23         for (int z = 0; z < Chunk::Depth(); ++z) {
  24                 for (int y = 0; y < Chunk::Height(); ++y) {
  25                         for (int x = 0; x < Chunk::Width(); ++x) {
  26                                 Block::Pos block_pos(x, y, z);
  27                                 glm::vec3 gen_pos = (coords + block_pos) / stretch;
  28                                 float val = solidNoise(gen_pos);
  29                                 if (val > solid_threshold) {
  30                                         int type_val = int((typeNoise(gen_pos) + 1.0f) * solids.size()) % solids.size();
  31                                         chunk.BlockAt(block_pos) = Block(solids[type_val]);
  32                                 } else {
  33                                         chunk.BlockAt(block_pos) = Block(space);
  34                                 }
  35                         }
  36                 }
  37         }
  38         chunk.Invalidate();
  39         chunk.CheckUpdate();
  40 }
  41
  42 }