Editor: Multi material code clean up.

editor/js/Editor.js

@@ -351,7 +351,11 @@ Editor.prototype = {
 
 		var material = object.material;
 
-		if( Array.isArray( material ) == true) material = material[ slot ];
+		if ( Array.isArray( material ) ) {
+
+			material = material[ slot ];
+
+		}
 
 		return material;
 
@@ -359,10 +363,16 @@ Editor.prototype = {
 
 	setObjectMaterial: function ( object, slot, newMaterial ) {
 
-		var material = object.material;
+		if ( Array.isArray( object.material ) ) {
+
+			object.material[ slot ] = newMaterial;
+
+		} else {
+
+			object.material = newMaterial;
+
+		}
 
-		if( Array.isArray( material ) == true) material[ slot ] = newMaterial;
-		else object.material = newMaterial;
 	},
 
 	//

editor/js/Sidebar.Material.js

@@ -24,7 +24,7 @@ Sidebar.Material = function ( editor ) {
 
 	var materialSlotRow = new UI.Row();
 
-	materialSlotRow.add( new UI.Text( 'Material Slot' ).setWidth( '90px' ) );
+	materialSlotRow.add( new UI.Text( 'Slot' ).setWidth( '90px' ) );
 
 	var materialSlotSelect =  new UI.Select().setWidth( '170px' ).setFontSize( '12px' ).onChange( update );
 
@@ -46,11 +46,12 @@ Sidebar.Material = function ( editor ) {
 
 		copiedMaterial = currentObject.material;
 
-		if( Array.isArray( copiedMaterial ) == true){
+		if ( Array.isArray( copiedMaterial ) ) {
 
-			if( copiedMaterial.length == 0 ) return;
+			if ( copiedMaterial.length === 0 ) return;
+
+			copiedMaterial = copiedMaterial[ currentMaterialSlot ];
 
-			copiedMaterial = copiedMaterial[ currentMaterialSlot ]
 		}
 
 	} ) );
@@ -515,8 +516,7 @@ Sidebar.Material = function ( editor ) {
 
 		currentMaterialSlot = parseInt( materialSlotSelect.getValue() );
 
-		if( currentMaterialSlot != previousSelectedSlot )
-			refreshUI(true);
+		if ( currentMaterialSlot !== previousSelectedSlot ) refreshUI( true );
 
 		material  = editor.getObjectMaterial( currentObject, currentMaterialSlot )
 
@@ -1005,11 +1005,18 @@ Sidebar.Material = function ( editor ) {
 
 		var material = currentObject.material;
 
-		if( Array.isArray( material ) == true){
+		if ( Array.isArray( material ) ) {
+
+			materialSlotRow.setDisplay( '' );
 
-			if( material.length == 0 ) return;
+			if ( material.length === 0 ) return;
+
+			material = material[ 0 ];
+
+		} else {
+
+			materialSlotRow.setDisplay( 'none' );
 
-			material = material[0]
 		}
 
 		for ( var property in properties ) {
@@ -1027,46 +1034,24 @@ Sidebar.Material = function ( editor ) {
 
 		var material = currentObject.material;
 
-		var materialArray = []
-		
-		if( Array.isArray( material ) == true){
+		if ( Array.isArray( material ) ) {
 
-			if( material.length == 0 ){
-
-				currentMaterialSlot = 0;
-
-				materialArray = [undefined];
-		
-			}else{
-
-				materialArray = material;
+			var slotOptions = {};
 
-			}
+			currentMaterialSlot = Math.max( 0, Math.min( material.length, currentMaterialSlot ) );
 
-		} else {
+			for ( var i = 0; i < material.length; i ++ ) {
 
-			materialArray = [material];
+				slotOptions[ i ] = String( i + 1 ) + ': ' + material[ i ].name;
 
 			}
 
-		var slotOptions = {};
-
-		if( ( currentMaterialSlot < 0 ) || ( currentMaterialSlot >= materialArray.length ) ) currentMaterialSlot = 0;
-
-		for( var i=0; i < materialArray.length; i++){
-
-			var material = materialArray[ i ];
+			materialSlotSelect.setOptions( slotOptions ).setValue( currentMaterialSlot );
 
-			var label =  material ? ( material.name == '' ? '[Unnamed]' : material.name ) : '[No Material]';
-
-			slotOptions[i] = '' + (i+1) + ':' + materialArray.length + ' ' + label;
 		}
 
-		materialSlotSelect.setOptions(slotOptions).setValue( currentMaterialSlot )
-
 		material = editor.getObjectMaterial( currentObject, currentMaterialSlot );
 
-
 		if ( material.uuid !== undefined ) {
 
 			materialUUID.setValue( material.uuid );
@@ -1352,14 +1337,22 @@ Sidebar.Material = function ( editor ) {
 	// events
 
 	signals.objectSelected.add( function ( object ) {
-		var hasMaterial = false
+
+		var hasMaterial = false;
 
 		if ( object && object.material ) {
-			if( ( Array.isArray( object.material ) === false ) || ( object.material.length > 0 ) )
+
 			hasMaterial = true;
+
+			if ( Array.isArray( object.material ) && object.material.length === 0 ) {
+
+				hasMaterial = false;
+
+			}
+
 		}
 
-		if( hasMaterial ){
+		if ( hasMaterial ) {
 
 			var objectChanged = object !== currentObject;