refactor WorldGenerator & update test generator script

src/world/generator/WorldGenerator.hpp

@@ -1,8 +1,10 @@
 #pragma once
 
 #include <string>
+#include <memory>
 
 #include "typedefs.hpp"
+#include "voxels/voxel.hpp"
 
 struct voxel;
 class Content;
@@ -12,10 +14,15 @@ struct GeneratorDef;
 class WorldGenerator {
     const GeneratorDef& def;
     const Content* content;
+    uint64_t seed;
 public:
+    /// @param def generator definition
+    /// @param content world content
+    /// @param seed world seed
     WorldGenerator(
         const GeneratorDef& def,
-        const Content* content
+        const Content* content,
+        uint64_t seed
     );
     virtual ~WorldGenerator() = default;
 
@@ -23,8 +30,7 @@ public:
     /// @param voxels destinatiopn chunk voxels buffer
     /// @param x chunk position X divided by CHUNK_W
     /// @param z chunk position Y divided by CHUNK_D
-    /// @param seed world seed
-    virtual void generate(voxel* voxels, int x, int z, uint64_t seed);
+    virtual void generate(voxel* voxels, int x, int z);
 
     inline static std::string DEFAULT = "core:default";
 };