Added scaleSnap to TransformControls.

examples/js/controls/TransformControls.js

@@ -34,6 +34,7 @@ THREE.TransformControls = function ( camera, domElement ) {
 	defineProperty( "mode", "translate" );
 	defineProperty( "translationSnap", null );
 	defineProperty( "rotationSnap", null );
+	defineProperty( "scaleSnap", null );
 	defineProperty( "space", "world" );
 	defineProperty( "size", 1 );
 	defineProperty( "dragging", false );
@@ -459,6 +460,28 @@ THREE.TransformControls = function ( camera, domElement ) {
 
 			object.scale.copy( scaleStart ).multiply( _tempVector2 );
 
+			if ( this.scaleSnap ) {
+
+				if ( axis.search( 'X' ) !== - 1 ) {
+
+					object.scale.x = Math.round( object.scale.x / this.scaleSnap ) * this.scaleSnap || this.scaleSnap;
+
+				}
+
+				if ( axis.search( 'Y' ) !== - 1 ) {
+
+					object.scale.y = Math.round( object.scale.y / this.scaleSnap ) * this.scaleSnap || this.scaleSnap;
+
+				}
+
+				if ( axis.search( 'Z' ) !== - 1 ) {
+
+					object.scale.z = Math.round( object.scale.z / this.scaleSnap ) * this.scaleSnap || this.scaleSnap;
+
+				}
+
+			}
+
 		} else if ( mode === 'rotate' ) {
 
 			offset.copy( pointEnd ).sub( pointStart );
@@ -633,6 +656,12 @@ THREE.TransformControls = function ( camera, domElement ) {
 
 	};
 
+	this.setScaleSnap = function ( scaleSnap ) {
+
+		scope.scaleSnap = scaleSnap;
+
+	};
+
 	this.setSize = function ( size ) {
 
 		scope.size = size;

examples/jsm/controls/TransformControls.js

@@ -57,6 +57,7 @@ var TransformControls = function ( camera, domElement ) {
 	defineProperty( "mode", "translate" );
 	defineProperty( "translationSnap", null );
 	defineProperty( "rotationSnap", null );
+	defineProperty( "scaleSnap", null );
 	defineProperty( "space", "world" );
 	defineProperty( "size", 1 );
 	defineProperty( "dragging", false );
@@ -482,6 +483,28 @@ var TransformControls = function ( camera, domElement ) {
 
 			object.scale.copy( scaleStart ).multiply( _tempVector2 );
 
+			if ( this.scaleSnap ) {
+
+				if ( axis.search( 'X' ) !== - 1 ) {
+
+					object.scale.x = Math.round( object.scale.x / this.scaleSnap ) * this.scaleSnap || this.scaleSnap;
+
+				}
+
+				if ( axis.search( 'Y' ) !== - 1 ) {
+
+					object.scale.y = Math.round( object.scale.y / this.scaleSnap ) * this.scaleSnap || this.scaleSnap;
+
+				}
+
+				if ( axis.search( 'Z' ) !== - 1 ) {
+
+					object.scale.z = Math.round( object.scale.z / this.scaleSnap ) * this.scaleSnap || this.scaleSnap;
+
+				}
+
+			}
+
 		} else if ( mode === 'rotate' ) {
 
 			offset.copy( pointEnd ).sub( pointStart );
@@ -656,6 +679,12 @@ var TransformControls = function ( camera, domElement ) {
 
 	};
 
+	this.setScaleSnap = function ( scaleSnap ) {
+
+		scope.scaleSnap = scaleSnap;
+
+	};
+
 	this.setSize = function ( size ) {
 
 		scope.size = size;

examples/misc_controls_transform.html

@@ -84,6 +84,7 @@
 						case 17: // Ctrl
 							control.setTranslationSnap( 100 );
 							control.setRotationSnap( THREE.Math.degToRad( 15 ) );
+							control.setScaleSnap( 0.25 );
 							break;
 
 						case 87: // W
@@ -135,6 +136,7 @@
 						case 17: // Ctrl
 							control.setTranslationSnap( null );
 							control.setRotationSnap( null );
+							control.setScaleSnap( null );
 							break;
 
 					}