add structures (WIP)

src/world/generator/Structure.cpp

@@ -0,0 +1,50 @@
+#include "Structure.hpp"
+
+#include <cstring>
+
+#include "data/dynamic.hpp"
+#include "data/dynamic_util.hpp"
+#include "voxels/ChunksStorage.hpp"
+#include "voxels/VoxelsVolume.hpp"
+#include "world/Level.hpp"
+
+std::unique_ptr<Structure> Structure::create(
+    Level* level, const glm::ivec3& a, const glm::ivec3& b, bool entities
+) {
+    auto start = glm::min(a, b);
+    auto size = glm::abs(a - b);
+
+    VoxelsVolume volume(size.x, size.y, size.z);
+    level->chunksStorage->getVoxels(&volume);
+
+    auto volVoxels = volume.getVoxels();
+    std::vector<voxel> voxels(size.x*size.y*size.z);
+    std::memcpy(voxels.data(), volVoxels, sizeof(voxel) * voxels.size());
+
+    return std::make_unique<Structure>(size, std::move(voxels));
+}
+
+std::unique_ptr<dynamic::Map> Structure::serialize() const {
+    auto root = std::make_unique<dynamic::Map>();
+    root->put("version", STRUCTURE_FORMAT_VERSION);
+    root->put("size", dynamic::to_value(size));
+
+    auto& voxelsArr = root->putList("voxels");
+    for (size_t i = 0; i < voxels.size(); i++) {
+        voxelsArr.put(voxels[i].id);
+        voxelsArr.put(blockstate2int(voxels[i].state));
+    }
+    return root;
+}
+
+void Structure::deserialize(dynamic::Map* src) {
+    size = glm::ivec3();
+    dynamic::get_vec(src, "size", size);
+    voxels.resize(size.x*size.y*size.z);
+
+    auto voxelsArr = src->list("voxels");
+    for (size_t i = 0; i < size.x*size.y*size.z; i++) {
+        voxels[i].id = voxelsArr->integer(i * 2);
+        voxels[i].state = int2blockstate(voxelsArr->integer(i * 2 + 1));
+    }
+}