Properly implement hiding of the terrain node, for LOD it was showing all blocks of all LODs at once

terrain/voxel_block.cpp

@@ -147,15 +147,30 @@ void VoxelBlock::set_world(World *world) {
 }
 
 void VoxelBlock::set_visible(bool visible) {
+	if (_visible && visible) {
+		return;
+	}
+	_visible = visible;
+	_set_visible(_visible && _parent_visible);
+}
+
+bool VoxelBlock::is_visible() const {
+	return _visible;
+}
+
+void VoxelBlock::_set_visible(bool visible) {
 	if (_mesh_instance.is_valid()) {
 		_mesh_instance.set_visible(visible);
 	}
 	if (_static_body.is_valid()) {
 		_static_body.set_shape_enabled(0, visible);
 	}
-	_visible = visible;
 }
 
-bool VoxelBlock::is_visible() const {
-	return _visible;
+void VoxelBlock::set_parent_visible(bool parent_visible) {
+	if (_parent_visible && parent_visible) {
+		return;
+	}
+	_parent_visible = parent_visible;
+	_set_visible(_visible && _parent_visible);
 }

terrain/voxel_block.h

@@ -39,6 +39,8 @@ public:
 	void set_visible(bool visible);
 	bool is_visible() const;
 
+	void set_parent_visible(bool parent_visible);
+
 	inline bool is_mesh_update_scheduled() {
 		return _mesh_state == MESH_UPDATE_NOT_SENT || _mesh_state == MESH_UPDATE_SENT;
 	}
@@ -46,6 +48,8 @@ public:
 private:
 	VoxelBlock();
 
+	void _set_visible(bool visible);
+
 	Vector3i _position_in_voxels;
 
 	DirectMeshInstance _mesh_instance;
@@ -53,6 +57,7 @@ private:
 
 	int _mesh_update_count = 0;
 	bool _visible = true;
+	bool _parent_visible = true;
 	MeshState _mesh_state = MESH_NEVER_UPDATED;
 
 	// The mesh might be null, but we don't know if it's actually empty or if it's loading.

terrain/voxel_lod_terrain.cpp

@@ -418,12 +418,12 @@ void VoxelLodTerrain::_notification(int p_what) {
 		}
 	};
 
-	struct SetVisibilityAction {
+	struct SetParentVisibilityAction {
 		bool visible;
-		SetVisibilityAction(bool v) :
+		SetParentVisibilityAction(bool v) :
 				visible(v) {}
 		void operator()(VoxelBlock *block) {
-			block->set_visible(visible);
+			block->set_parent_visible(visible);
 		}
 	};
 
@@ -456,8 +456,7 @@ void VoxelLodTerrain::_notification(int p_what) {
 		} break;
 
 		case NOTIFICATION_VISIBILITY_CHANGED: {
-			// TODO This is wrong, some blocks NEED to remain hidden
-			SetVisibilityAction sva(is_visible());
+			SetParentVisibilityAction sva(is_visible());
 			for_all_blocks(sva);
 		} break;
 
@@ -934,6 +933,7 @@ void VoxelLodTerrain::_process() {
 			//print_line(String("Adding block {0} at lod {1}").format(varray(eo.block_position.to_vec3(), eo.lod)));
 			// The block will be made visible and meshed only by LodOctree
 			block->set_visible(false);
+			block->set_parent_visible(is_visible());
 		}
 	}
 

terrain/voxel_terrain.cpp

@@ -607,12 +607,12 @@ void VoxelTerrain::_notification(int p_what) {
 		}
 	};
 
-	struct SetVisibilityAction {
+	struct SetParentVisibilityAction {
 		bool visible;
-		SetVisibilityAction(bool v) :
+		SetParentVisibilityAction(bool v) :
 				visible(v) {}
 		void operator()(VoxelBlock *block) {
-			block->set_visible(visible);
+			block->set_parent_visible(visible);
 		}
 	};
 
@@ -646,7 +646,7 @@ void VoxelTerrain::_notification(int p_what) {
 
 		case NOTIFICATION_VISIBILITY_CHANGED:
 			ERR_FAIL_COND(_map.is_null());
-			_map->for_all_blocks(SetVisibilityAction(is_visible()));
+			_map->for_all_blocks(SetParentVisibilityAction(is_visible()));
 			break;
 
 			// TODO Listen for transform changes
@@ -1062,6 +1062,7 @@ void VoxelTerrain::_process() {
 			}
 
 			block->set_mesh(mesh, this, _generate_collisions, collidable_surface, get_tree()->is_debugging_collisions_hint());
+			block->set_parent_visible(is_visible());
 		}
 
 		shift_up(_blocks_pending_main_thread_update, queue_index);