add placements priority

src/world/generator/GeneratorDef.hpp

@@ -118,11 +118,6 @@ struct Biome {
     BlocksLayers seaLayers;
 };
 
-struct PrototypePlacements {
-    std::vector<StructurePlacement> structs {};
-    std::vector<LinePlacement> lines {};
-};
-
 /// @brief Generator behaviour and settings interface
 class GeneratorScript {
 public:
@@ -154,7 +149,7 @@ public:
         uint bpd
     ) = 0;
 
-    virtual PrototypePlacements placeStructuresWide(
+    virtual std::vector<Placement> placeStructuresWide(
         const glm::ivec2& offset, 
         const glm::ivec2& size, 
         uint64_t seed,
@@ -169,7 +164,7 @@ public:
     /// @param heightmap area heightmap
     /// @param chunkHeight chunk height to use as heights multiplier
     /// @return structure & line placements
-    virtual PrototypePlacements placeStructures(
+    virtual std::vector<Placement> placeStructures(
         const glm::ivec2& offset, const glm::ivec2& size, uint64_t seed,
         const std::shared_ptr<Heightmap>& heightmap, uint chunkHeight) = 0;
 };