glam/es5/lib/scene/node/add.js

Experimental WebGL Engine

"use strict";

Object.defineProperty(exports, "__esModule", {
	value: true
});
exports.addChildToNode = addChildToNode;
exports.default = add;

var _updateTypes = require("./update-types");

var _updateTypes2 = _interopRequireDefault(_updateTypes);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _typeof(obj) { return obj && typeof Symbol !== "undefined" && obj.constructor === Symbol ? "symbol" : typeof obj; }

function addChildToNode(scene, graph, parent, child) {

	if ((typeof child === "undefined" ? "undefined" : _typeof(child)) !== "object") {
		throw new Error("Only objects are allowed in the scene graph");
	}

	if (graph.parent.get(child)) {
		throw new Error("The node was already added to the scene graph, it must be removed before adding it somewhere else.");
	}

	var children = scene.children(parent);

	// Add the child/parent relationship
	children.push(child);
	graph.parent.set(child, parent);

	// Update scene flags and counts
	(0, _updateTypes2.default)(scene, graph, child, "add");
	scene.flags.changed = true;
}

function add(scene, graph, a, b) {

	var node, child;

	if (a && b) {
		node = a;
		child = b;
	} else if (a && !b) {
		node = scene;
		child = a;
	} else {
		throw new Error('Tried to add nothing to the scene.');
	}

	addChildToNode(scene, graph, node, child);

	return scene;
}