Added trees conversion function for old worlds (F9)

src/frontend/screens.cpp

@@ -32,6 +32,9 @@
 #include "gui/panels.h"
 #include "menu.h"
 
+#include "../content/Content.h"
+#include "../voxels/Block.h"
+
 using std::string;
 using std::wstring;
 using glm::vec3;
@@ -125,6 +128,23 @@ void LevelScreen::updateHotkeys() {
     if (Events::jpressed(keycode::F5)) {
         level->chunks->saveAndClear();
     }
+
+    // TODO: remove in v0.16
+    if (Events::jpressed(keycode::F9)) {
+        blockid_t woodid = level->content->require("base:wood")->rt.id;
+        for (size_t i = 0; i < level->chunks->volume; i++){
+            Chunk* chunk = level->chunks->chunks[i].get();
+            if (chunk) {
+                for (uint i = 0; i < CHUNK_VOL; i++) {
+                    auto& vox = chunk->voxels[i];
+                    if (vox.id == woodid) {
+                        vox.states = BLOCK_DIR_UP;
+                    }
+                }
+            }
+        }
+        level->chunks->saveAndClear();
+    }
 }
 
 void LevelScreen::update(float delta) {