Streaming/LOD can be set to follow the editor camera instead of being centered on world origin

CHANGELOG.md

@@ -13,16 +13,20 @@ Semver is not yet in place, so each version can have breaking changes, although
 - General
     - Introduction of Voxel Server, which shares threaded tasks among all voxel nodes
     - Voxel data is no longer copied when sent to processing threads, reducing high memory spikes in some scenarios
-    - Added a utility class to load MagicaVoxel `.vox` files
+    - Added a utility class to load `.vox` files created with MagicaVoxel (scripts only)
     - Voxel nodes can be moved, scaled and rotated
     - Voxel nodes can be limited to specific bounds, rather than being infinitely paging volumes (multiples of block size)
     - Meshers are now resources so you can choose and configure them per terrain
 
+- Editor
+    - Streaming/LOD can be set to follow the editor camera instead of being centered on world origin
+    - Added About window
+
 - Smooth voxels
     - Shaders now have access to the transform of each block, useful for triplanar mapping on moving volumes
 
 - Blocky voxels
-    - Introduced a second blocky mesher dedicated to colored cubes, with greedy meshing and palette support
+    - Introduced a second blocky mesher dedicated to colored cubes, with greedy meshing and palette support (scripts only)
     - Replaced `transparent` property with `transparency_index` for more control on the culling of transparent faces
 
 - Breaking changes
@@ -43,7 +47,6 @@ Semver is not yet in place, so each version can have breaking changes, although
 ---------------------------
 
 - General
-    - Terrain nodes now render in the editor, unless scripts are involved (can be changed with an option)
     - Added per-voxel and per-block metadata, which are saved by file streams along with voxel data
     - `StringName` is now used when possible to call script functions, to reduce overhead
     - Exposed block serializer to allow encoding voxels for network or files from script
@@ -51,6 +54,9 @@ Semver is not yet in place, so each version can have breaking changes, although
     - The module only prints debug logs if the engine is in verbose mode
     - `VoxelTerrain` now emit signals when blocks are loaded and unloaded
 
+- Editor
+    - Terrain nodes now render in the editor, unless scripts are involved (can be changed with an option)
+
 - Blocky voxels
     - Added collision masks to blocky voxels, which takes effect with `VoxelBoxMover` and voxel raycasts
     - Added random tick API for blocky terrains

editor/terrain/voxel_terrain_editor_plugin.cpp

@@ -5,6 +5,7 @@
 #include "../about_window.h"
 #include "../graph/voxel_graph_node_inspector_wrapper.h"
 
+#include <scene/3d/camera.h>
 #include <scene/gui/menu_button.h>
 
 VoxelTerrainEditorPlugin::VoxelTerrainEditorPlugin(EditorNode *p_node) {
@@ -13,6 +14,13 @@ VoxelTerrainEditorPlugin::VoxelTerrainEditorPlugin(EditorNode *p_node) {
 	menu_button->get_popup()->add_item(TTR("Re-generate"), MENU_RESTART_STREAM);
 	menu_button->get_popup()->add_item(TTR("Re-mesh"), MENU_REMESH);
 	menu_button->get_popup()->add_separator();
+	menu_button->get_popup()->add_item(TTR("Stream follow camera"), MENU_STREAM_FOLLOW_CAMERA);
+	{
+		const int i = menu_button->get_popup()->get_item_index(MENU_STREAM_FOLLOW_CAMERA);
+		menu_button->get_popup()->set_item_as_checkable(i, true);
+		menu_button->get_popup()->set_item_checked(i, _editor_viewer_follows_camera);
+	}
+	menu_button->get_popup()->add_separator();
 	menu_button->get_popup()->add_item(TTR("About Voxel Tools..."), MENU_ABOUT);
 	menu_button->get_popup()->connect("id_pressed", this, "_on_menu_item_selected");
 	menu_button->hide();
@@ -25,6 +33,19 @@ VoxelTerrainEditorPlugin::VoxelTerrainEditorPlugin(EditorNode *p_node) {
 	base_control->add_child(_about_window);
 }
 
+void VoxelTerrainEditorPlugin::_notification(int p_what) {
+	switch (p_what) {
+		case NOTIFICATION_ENTER_TREE:
+			_editor_viewer_id = VoxelServer::get_singleton()->add_viewer();
+			VoxelServer::get_singleton()->set_viewer_distance(_editor_viewer_id, 512);
+			break;
+
+		case NOTIFICATION_EXIT_TREE:
+			VoxelServer::get_singleton()->remove_viewer(_editor_viewer_id);
+			break;
+	}
+}
+
 // Things the plugin doesn't directly work on, but still handles to keep things visible.
 // This is basically a hack because it's not easy to express that with EditorPlugin API.
 // The use case being, as long as we edit an object NESTED within a voxel terrain, we should keep things visible.
@@ -107,6 +128,17 @@ void VoxelTerrainEditorPlugin::make_visible(bool visible) {
 	// So we'll need to check if _node is null all over the place
 }
 
+bool VoxelTerrainEditorPlugin::forward_spatial_gui_input(Camera *p_camera, const Ref<InputEvent> &p_event) {
+	VoxelServer::get_singleton()->set_viewer_distance(_editor_viewer_id, p_camera->get_zfar());
+	_editor_camera_last_position = p_camera->get_global_transform().origin;
+
+	if (_editor_viewer_follows_camera) {
+		VoxelServer::get_singleton()->set_viewer_position(_editor_viewer_id, _editor_camera_last_position);
+	}
+
+	return false;
+}
+
 void VoxelTerrainEditorPlugin::_on_menu_item_selected(int id) {
 	switch (id) {
 		case MENU_RESTART_STREAM:
@@ -119,6 +151,17 @@ void VoxelTerrainEditorPlugin::_on_menu_item_selected(int id) {
 			_node->remesh_all_blocks();
 			break;
 
+		case MENU_STREAM_FOLLOW_CAMERA: {
+			_editor_viewer_follows_camera = !_editor_viewer_follows_camera;
+
+			const int i = _menu_button->get_popup()->get_item_index(MENU_STREAM_FOLLOW_CAMERA);
+			_menu_button->get_popup()->set_item_checked(i, _editor_viewer_follows_camera);
+
+			if (_editor_viewer_follows_camera) {
+				VoxelServer::get_singleton()->set_viewer_position(_editor_viewer_id, _editor_camera_last_position);
+			}
+		} break;
+
 		case MENU_ABOUT:
 			_about_window->popup_centered();
 			break;

editor/terrain/voxel_terrain_editor_plugin.h

@@ -15,6 +15,10 @@ public:
 	bool handles(Object *p_object) const override;
 	void edit(Object *p_object) override;
 	void make_visible(bool visible) override;
+	bool forward_spatial_gui_input(Camera *p_camera, const Ref<InputEvent> &p_event) override;
+
+protected:
+	void _notification(int p_what);
 
 private:
 	void set_node(VoxelNode *node);
@@ -28,11 +32,16 @@ private:
 	enum MenuID {
 		MENU_RESTART_STREAM,
 		MENU_REMESH,
+		MENU_STREAM_FOLLOW_CAMERA,
 		MENU_ABOUT
 	};
 
 	VoxelNode *_node = nullptr;
 
+	uint32_t _editor_viewer_id = -1;
+	Vector3 _editor_camera_last_position;
+	bool _editor_viewer_follows_camera = false;
+
 	MenuButton *_menu_button = nullptr;
 	VoxelAboutWindow *_about_window = nullptr;
 };

server/voxel_server.cpp

@@ -56,13 +56,6 @@ VoxelServer::VoxelServer() {
 	_meshing_thread_pool.set_priority_update_period(64);
 	_meshing_thread_pool.set_batch_count(1);
 
-	if (Engine::get_singleton()->is_editor_hint()) {
-		// Default viewer
-		const uint32_t default_viewer_id = add_viewer();
-		Viewer &default_viewer = _world.viewers.get(default_viewer_id);
-		default_viewer.is_default = true;
-	}
-
 	// Init world
 	_world.shared_priority_dependency = gd_make_shared<PriorityDependencyShared>();
 
@@ -297,30 +290,11 @@ void VoxelServer::remove_volume(uint32_t volume_id) {
 }
 
 uint32_t VoxelServer::add_viewer() {
-	if (Engine::get_singleton()->is_editor_hint()) {
-		// Remove default viewer if any
-		_world.viewers.for_each_with_id([this](Viewer &viewer, uint32_t id) {
-			if (viewer.is_default) {
-				// Safe because StructDB does not reallocate the data structure on removal
-				_world.viewers.destroy(id);
-			}
-		});
-	}
-
 	return _world.viewers.create(Viewer());
 }
 
 void VoxelServer::remove_viewer(uint32_t viewer_id) {
 	_world.viewers.destroy(viewer_id);
-
-	if (Engine::get_singleton()->is_editor_hint()) {
-		// Re-add default viewer
-		if (_world.viewers.count() == 0) {
-			const uint32_t default_viewer_id = add_viewer();
-			Viewer &default_viewer = _world.viewers.get(default_viewer_id);
-			default_viewer.is_default = true;
-		}
-	}
 }
 
 void VoxelServer::set_viewer_position(uint32_t viewer_id, Vector3 position) {

server/voxel_server.h

@@ -62,7 +62,6 @@ public:
 		unsigned int view_distance = 128;
 		bool require_collisions = false;
 		bool require_visuals = true;
-		bool is_default = false;
 	};
 
 	enum VolumeType {

terrain/voxel_lod_terrain.cpp

@@ -507,22 +507,16 @@ void VoxelLodTerrain::_notification(int p_what) {
 }
 
 Vector3 VoxelLodTerrain::get_local_viewer_pos() const {
-	if (Engine::get_singleton()->is_editor_hint()) {
-		// TODO Use editor's camera here
-		return Vector3();
+	Vector3 pos = (_lods[0].last_viewer_block_pos << _lods[0].map.get_block_size_pow2()).to_vec3();
 
-	} else {
-		Vector3 pos = (_lods[0].last_viewer_block_pos << _lods[0].map.get_block_size_pow2()).to_vec3();
+	// TODO Support for multiple viewers, this is a placeholder implementation
+	VoxelServer::get_singleton()->for_each_viewer([&pos](const VoxelServer::Viewer &viewer, uint32_t viewer_id) {
+		pos = viewer.world_position;
+	});
 
-		// TODO Support for multiple viewers, this is a placeholder implementation
-		VoxelServer::get_singleton()->for_each_viewer([&pos](const VoxelServer::Viewer &viewer, uint32_t viewer_id) {
-			pos = viewer.world_position;
-		});
-
-		const Transform world_to_local = get_global_transform().affine_inverse();
-		pos = world_to_local.xform(pos);
-		return pos;
-	}
+	const Transform world_to_local = get_global_transform().affine_inverse();
+	pos = world_to_local.xform(pos);
+	return pos;
 }
 
 void VoxelLodTerrain::try_schedule_loading_with_neighbors(const Vector3i &p_bpos, int lod_index) {