refactor: change pointer parameters to references for Level and Content in various classes

src/world/generator/VoxelFragment.cpp

@@ -59,7 +59,7 @@ std::unique_ptr<VoxelFragment> VoxelFragment::create(
 
     std::vector<std::string> blockNames {CORE_AIR};
     std::unordered_map<blockid_t, blockid_t> blocksRegistered {{0, 0}};
-    auto contentIndices = level.content->getIndices();
+    auto contentIndices = level.content.getIndices();
     for (size_t i = 0 ; i < voxels.size(); i++) {
         blockid_t id = volVoxels[i].id;
         blockid_t index;

src/world/generator/WorldGenerator.cpp

@@ -24,7 +24,7 @@ static inline constexpr uint MAX_PARAMETERS = 4;
 static inline constexpr uint BASIC_PROTOTYPE_LAYERS = 5;
 
 WorldGenerator::WorldGenerator(
-    const GeneratorDef& def, const Content* content, uint64_t seed
+    const GeneratorDef& def, const Content& content, uint64_t seed
 )
     : def(def), 
       content(content), 
@@ -66,10 +66,10 @@ WorldGenerator::WorldGenerator(
     });
     for (int i = 0; i < def.structures.size(); i++) {
         // pre-calculate rotated structure variants
-        def.structures[i]->fragments[0]->prepare(*content);
+        def.structures[i]->fragments[0]->prepare(content);
         for (int j = 1; j < 4; j++) {
             def.structures[i]->fragments[j] = 
-                def.structures[i]->fragments[j-1]->rotated(*content);
+                def.structures[i]->fragments[j-1]->rotated(content);
         }
     }
 }
@@ -367,7 +367,7 @@ void WorldGenerator::generatePlants(
     int chunkZ,
     const Biome** biomes
 ) {
-    const auto& indices = content->getIndices()->blocks;
+    const auto& indices = content.getIndices()->blocks;
     util::PseudoRandom plantsRand;
     plantsRand.setSeed(chunkX, chunkZ);
 
@@ -431,7 +431,7 @@ void WorldGenerator::generate(voxel* voxels, int chunkX, int chunkZ) {
 
     std::memset(voxels, 0, sizeof(voxel) * CHUNK_VOL);
 
-    const auto& indices = content->getIndices()->blocks;
+    const auto& indices = content.getIndices()->blocks;
     const auto& biomes = prototype.biomes.get();
     for (uint z = 0; z < CHUNK_D; z++) {
         for (uint x = 0; x < CHUNK_W; x++) {
@@ -531,7 +531,7 @@ void WorldGenerator::generateLine(
     voxel* voxels, 
     int chunkX, int chunkZ
 ) {
-    const auto& indices = content->getIndices()->blocks;
+    const auto& indices = content.getIndices()->blocks;
 
     int cgx = chunkX * CHUNK_W;
     int cgz = chunkZ * CHUNK_D;

src/world/generator/WorldGenerator.hpp

@@ -50,7 +50,7 @@ class WorldGenerator {
     /// @param def generator definition
     const GeneratorDef& def;
     /// @param content world content
-    const Content* content;
+    const Content& content;
     /// @param seed world seed
     uint64_t seed;
     /// @brief Chunk prototypes main storage
@@ -120,7 +120,7 @@ class WorldGenerator {
 public:
     WorldGenerator(
         const GeneratorDef& def,
-        const Content* content,
+        const Content& content,
         uint64_t seed
     );
     ~WorldGenerator();