feat: new block custom models implementation (WIP)

src/frontend/ContentGfxCache.hpp

@@ -3,15 +3,22 @@
 #include "typedefs.hpp"
 
 #include <memory>
+#include <stdexcept>
+#include <unordered_map>
 
 class Content;
 class Assets;
 struct UVRegion;
 
+namespace model {
+    struct Model;
+}
+
 class ContentGfxCache {
     const Content* content;
     // array of block sides uv regions (6 per block)
     std::unique_ptr<UVRegion[]> sideregions;
+    std::unordered_map<blockid_t, model::Model> models;
 public:
     ContentGfxCache(const Content* content, Assets* assets);
     ~ContentGfxCache();
@@ -19,6 +26,8 @@ public:
     inline const UVRegion& getRegion(blockid_t id, int side) const {
         return sideregions[id * 6 + side];
     }
+
+    const model::Model& getModel(blockid_t id) const;
     
     const Content* getContent() const;
 };