some code reorganization

[blank.git] / src / world / Generator.cpp

diff --git a/src/world/Generator.cpp b/src/world/Generator.cpp
new file mode 100644 (file)
index 0000000..c49dce1
--- /dev/null
+++ b/src/world/Generator.cpp
@@ -0,0 +1,54 @@
+#include "Generator.hpp"
+
+#include "Chunk.hpp"
+#include "../rand/OctaveNoise.hpp"
+
+#include <glm/glm.hpp>
+
+
+namespace blank {
+
+Generator::Generator(const Config &config) noexcept
+: solidNoise(config.solid_seed)
+, typeNoise(config.type_seed)
+, stretch(1.0f/config.stretch)
+, solid_threshold(config.solid_threshold)
+, space(0)
+, light(0)
+, solids() {
+
+}
+
+
+void Generator::operator ()(Chunk &chunk) const noexcept {
+       Chunk::Pos pos(chunk.Position());
+       glm::vec3 coords(pos * Chunk::Extent());
+       for (int z = 0; z < Chunk::depth; ++z) {
+               for (int y = 0; y < Chunk::height; ++y) {
+                       for (int x = 0; x < Chunk::width; ++x) {
+                               Block::Pos block_pos(x, y, z);
+                               glm::vec3 gen_pos = (coords + block_pos) * stretch;
+                               float val = OctaveNoise(solidNoise, coords + block_pos, 3, 0.5f, stretch, 2.0f);
+                               if (val > solid_threshold) {
+                                       int type_val = int((typeNoise(gen_pos) + 1.0f) * solids.size()) % solids.size();
+                                       chunk.SetBlock(block_pos, Block(solids[type_val]));
+                               } else {
+                                       chunk.SetBlock(block_pos, Block(space));
+                               }
+                       }
+               }
+       }
+       unsigned int random = 263167 * pos.x + 2097593 * pos.y + 426389 * pos.z;
+       for (int index = 0; index < Chunk::size; ++index) {
+               if (chunk.IsSurface(index)) {
+                       random = random * 666649 + 7778777;
+                       if ((random % 32) == 0) {
+                               chunk.SetBlock(index, Block(light));
+                       }
+               }
+       }
+       chunk.Invalidate();
+       chunk.CheckUpdate();
+}
+
+}