Added signals for Material added and removed

editor/js/Editor.js

@@ -57,7 +57,9 @@ var Editor = function () {
 		helperAdded: new Signal(),
 		helperRemoved: new Signal(),
 
+		materialAdded: new Signal(),
 		materialChanged: new Signal(),
+		materialRemoved: new Signal(),
 
 		scriptAdded: new Signal(),
 		scriptChanged: new Signal(),
@@ -234,6 +236,32 @@ Editor.prototype = {
 	addMaterial: function ( material ) {
 
 		this.materials[ material.uuid ] = material;
+		this.signals.materialAdded.dispatch();
+
+	},
+
+	removeMaterial: function ( material ) {
+
+		delete this.materials[ material.uuid ];
+		this.signals.materialRemoved.dispatch();
+
+	},
+
+	getMaterialById ( id ) {
+
+		var material;
+		var materials = Object.values( this.materials );
+
+		for( var i = 0; i < materials.length; i ++ ) {
+			
+			if ( materials[i].id === id ) {
+				material = materials[i];
+				break;
+			}
+
+		}
+
+		return material;
 
 	},