add GeneratorScript

src/world/generator/GeneratorDef.hpp

@@ -1,10 +1,23 @@
 #pragma once
 
 #include <string>
+#include <glm/glm.hpp>
 
 #include "typedefs.hpp"
+#include "maths/Heightmap.hpp"
+
+class GeneratorScript {
+public:
+    virtual ~GeneratorScript() = default;
+
+    virtual std::shared_ptr<Heightmap> generateHeightmap(
+        const glm::ivec2& offset, const glm::ivec2& size) = 0;
+};
 
 struct GeneratorDef {
     std::string name;
-    scriptenv env;
+    std::unique_ptr<GeneratorScript> script;
+
+    GeneratorDef(std::string name) : name(std::move(name)) {}
+    GeneratorDef(const GeneratorDef&) = delete;
 };