Enable script in big world (#884)

* add docs for tower

* fix: LEAK: ByteBuf.release() was not called

* enableScriptInBigWorld

* not print log when loaded scripts from cache

* revert the change of server tick

* revert the change of server tick

* fix

* optimize the performance: lazy load & cache

* fix the refresh group

* fix NPE

Co-authored-by: Melledy <52122272+Melledy@users.noreply.github.com>

src/main/java/emu/grasscutter/scripts/data/SceneMeta.java

@@ -0,0 +1,71 @@
+package emu.grasscutter.scripts.data;
+
+import ch.ethz.globis.phtree.PhTree;
+import ch.ethz.globis.phtree.v16.PhTree16;
+import emu.grasscutter.Grasscutter;
+import emu.grasscutter.scripts.SceneIndexManager;
+import emu.grasscutter.scripts.ScriptLoader;
+
+import javax.script.Bindings;
+import javax.script.CompiledScript;
+import javax.script.ScriptException;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import static emu.grasscutter.Configuration.SCRIPT;
+
+public class SceneMeta {
+
+    public SceneConfig config;
+    public Map<Integer, SceneBlock> blocks;
+
+    public Bindings context;
+
+    public PhTree<SceneBlock> sceneBlockIndex = new PhTree16<>(2);
+
+    public static SceneMeta of(int sceneId) {
+        return new SceneMeta().load(sceneId);
+    }
+
+    public SceneMeta load(int sceneId){
+        // Get compiled script if cached
+        CompiledScript cs = ScriptLoader.getScriptByPath(
+                SCRIPT("Scene/" + sceneId + "/scene" + sceneId + "." + ScriptLoader.getScriptType()));
+
+        if (cs == null) {
+            Grasscutter.getLogger().warn("No script found for scene " + sceneId);
+            return null;
+        }
+
+        // Create bindings
+        context = ScriptLoader.getEngine().createBindings();
+
+        // Eval script
+        try {
+            cs.eval(context);
+
+            this.config = ScriptLoader.getSerializer().toObject(SceneConfig.class, context.get("scene_config"));
+
+            // TODO optimize later
+            // Create blocks
+            List<Integer> blockIds = ScriptLoader.getSerializer().toList(Integer.class, context.get("blocks"));
+            List<SceneBlock> blocks = ScriptLoader.getSerializer().toList(SceneBlock.class, context.get("block_rects"));
+
+            for (int i = 0; i < blocks.size(); i++) {
+                SceneBlock block = blocks.get(i);
+                block.id = blockIds.get(i);
+
+            }
+
+            this.blocks = blocks.stream().collect(Collectors.toMap(b -> b.id, b -> b));
+            SceneIndexManager.buildIndex(this.sceneBlockIndex, blocks, g -> g.min.toXZLongArray());
+            SceneIndexManager.buildIndex(this.sceneBlockIndex, blocks, g -> g.max.toXZLongArray());
+        } catch (ScriptException e) {
+            Grasscutter.getLogger().error("Error running script", e);
+            return null;
+        }
+        Grasscutter.getLogger().info("scene {} metadata is loaded successfully.", sceneId);
+        return this;
+    }
+}