feat(All):Initial

packages/sdk/lib/core/commands/SetSceneCommand.ts

@@ -0,0 +1,85 @@
+import {Scene} from "three";
+import { Command } from './Command';
+import { SetUuidCommand } from './SetUuidCommand';
+import { SetValueCommand } from './SetValueCommand';
+import { AddObjectCommand } from './AddObjectCommand';
+import {useSignal} from "@/hooks";
+import App from "../app/App";
+
+const {setActive,dispatch} = useSignal();
+
+/**
+ * @param scene containing children to import
+ * @constructor
+ */
+class SetSceneCommand extends Command {
+	private cmdArray: any[];
+	constructor(scene:Scene) {
+		super();
+
+		this.type = 'SetSceneCommand';
+		this.name = 'Set scene';
+
+		this.cmdArray = [];
+
+		if (scene !== undefined) {
+			this.cmdArray.push( new SetUuidCommand(App.scene, scene.uuid));
+			this.cmdArray.push( new SetValueCommand(App.scene, 'name', scene.name));
+			this.cmdArray.push( new SetValueCommand(App.scene, 'userData', JSON.parse(JSON.stringify(scene.userData))));
+
+			while ( scene.children.length > 0 ) {
+				const child = scene.children.pop();
+				this.cmdArray.push(new AddObjectCommand(child));
+			}
+		}
+	}
+
+	execute() {
+		setActive("sceneGraphChanged",false);
+
+		for (let i = 0; i < this.cmdArray.length; i++) {
+			this.cmdArray[i].execute();
+		}
+
+		setActive("sceneGraphChanged",true);
+		dispatch("sceneGraphChanged");
+	}
+
+	undo() {
+		setActive("sceneGraphChanged",false);
+
+		for (let i = this.cmdArray.length - 1; i >= 0; i--) {
+			this.cmdArray[i].undo();
+		}
+
+		setActive("sceneGraphChanged",true);
+		dispatch("sceneGraphChanged");
+	}
+
+	toJSON() {
+		const output = super.toJSON();
+
+		const cmds:string[] = [];
+		for ( let i = 0; i < this.cmdArray.length; i ++ ) {
+			cmds.push(this.cmdArray[ i ].toJSON());
+		}
+
+		output.cmds = cmds;
+
+		return output;
+	}
+
+	fromJSON(json) {
+		super.fromJSON( json );
+
+		const cmds = json.cmds;
+		for ( let i = 0; i < cmds.length; i ++ ) {
+			// @ts-ignore
+			const cmd = new window[cmds[i].type]();	// 创建类型为“json.type”的新对象
+			cmd.fromJSON(cmds[i]);
+			this.cmdArray.push(cmd);
+		}
+	}
+}
+
+export { SetSceneCommand };