Merge pull request #79899 from KoBeWi/snapped_in_half

Improve atlas tile size dragging

editor/plugins/tiles/tile_set_atlas_source_editor.cpp

@@ -1141,24 +1141,26 @@ void TileSetAtlasSourceEditor::_tile_atlas_control_gui_input(const Ref<InputEven
 				}
 			} else if (drag_type >= DRAG_TYPE_RESIZE_TOP_LEFT && drag_type <= DRAG_TYPE_RESIZE_LEFT) {
 				// Resizing a tile.
-				new_base_tiles_coords = new_base_tiles_coords.max(Vector2i(-1, -1)).min(grid_size);
-
 				Rect2i old_rect = Rect2i(drag_current_tile, tile_set_atlas_source->get_tile_size_in_atlas(drag_current_tile));
 				Rect2i new_rect = old_rect;
 
 				if (drag_type == DRAG_TYPE_RESIZE_LEFT || drag_type == DRAG_TYPE_RESIZE_TOP_LEFT || drag_type == DRAG_TYPE_RESIZE_BOTTOM_LEFT) {
+					new_base_tiles_coords = _get_drag_offset_tile_coords(Vector2i(-1, 0));
 					new_rect.position.x = MIN(new_base_tiles_coords.x + 1, old_rect.get_end().x - 1);
 					new_rect.size.x = old_rect.get_end().x - new_rect.position.x;
 				}
 				if (drag_type == DRAG_TYPE_RESIZE_TOP || drag_type == DRAG_TYPE_RESIZE_TOP_LEFT || drag_type == DRAG_TYPE_RESIZE_TOP_RIGHT) {
+					new_base_tiles_coords = _get_drag_offset_tile_coords(Vector2i(0, -1));
 					new_rect.position.y = MIN(new_base_tiles_coords.y + 1, old_rect.get_end().y - 1);
 					new_rect.size.y = old_rect.get_end().y - new_rect.position.y;
 				}
 
 				if (drag_type == DRAG_TYPE_RESIZE_RIGHT || drag_type == DRAG_TYPE_RESIZE_TOP_RIGHT || drag_type == DRAG_TYPE_RESIZE_BOTTOM_RIGHT) {
+					new_base_tiles_coords = _get_drag_offset_tile_coords(Vector2i(1, 0));
 					new_rect.set_end(Vector2i(MAX(new_base_tiles_coords.x, old_rect.position.x + 1), new_rect.get_end().y));
 				}
 				if (drag_type == DRAG_TYPE_RESIZE_BOTTOM || drag_type == DRAG_TYPE_RESIZE_BOTTOM_LEFT || drag_type == DRAG_TYPE_RESIZE_BOTTOM_RIGHT) {
+					new_base_tiles_coords = _get_drag_offset_tile_coords(Vector2i(0, 1));
 					new_rect.set_end(Vector2i(new_rect.get_end().x, MAX(new_base_tiles_coords.y, old_rect.position.y + 1)));
 				}
 
@@ -2173,6 +2175,12 @@ void TileSetAtlasSourceEditor::_undo_redo_inspector_callback(Object *p_undo_redo
 #undef ADD_UNDO
 }
 
+Vector2i TileSetAtlasSourceEditor::_get_drag_offset_tile_coords(const Vector2i &p_offset) const {
+	Vector2i half_tile_size = tile_set->get_tile_size() / 2;
+	Vector2i new_base_tiles_coords = tile_atlas_view->get_atlas_tile_coords_at_pos(tile_atlas_control->get_local_mouse_position() + half_tile_size * p_offset);
+	return new_base_tiles_coords.max(Vector2i(-1, -1)).min(tile_set_atlas_source->get_atlas_grid_size());
+}
+
 void TileSetAtlasSourceEditor::edit(Ref<TileSet> p_tile_set, TileSetAtlasSource *p_tile_set_atlas_source, int p_source_id) {
 	ERR_FAIL_COND(!p_tile_set.is_valid());
 	ERR_FAIL_COND(!p_tile_set_atlas_source);

editor/plugins/tiles/tile_set_atlas_source_editor.h

@@ -270,6 +270,7 @@ private:
 	void _auto_create_tiles();
 	void _auto_remove_tiles();
 	AcceptDialog *confirm_auto_create_tiles = nullptr;
+	Vector2i _get_drag_offset_tile_coords(const Vector2i &p_offset) const;
 
 	void _tile_set_changed();
 	void _tile_proxy_object_changed(String p_what);