class Transform

The Transform class provides access to color adjustment properties and two- or three-dimensional transformation objects that can be applied to a display object. During the transformation, the color or the orientation and position of a display object is adjusted (offset) from the current values or coordinates to new values or coordinates. The Transform class also collects data about color and two-dimensional matrix transformations that are applied to a display object and all of its parent objects. You can access these combined transformations through the concatenatedColorTransform and concatenatedMatrix properties.

To apply color transformations: create a ColorTransform object, set the color adjustments using the object's methods and properties, and then assign the colorTransformation property of the transform property of the display object to the new ColorTransformation object.

To apply two-dimensional transformations: create a Matrix object, set the matrix's two-dimensional transformation, and then assign the transform.matrix property of the display object to the new Matrix object.

To apply three-dimensional transformations: start with a three-dimensional display object. A three-dimensional display object has a z property value other than zero. You do not need to create the Matrix3D object. For all three-dimensional objects, a Matrix3D object is created automatically when you assign a z value to a display object. You can access the display object's Matrix3D object through the display object's transform property. Using the methods of the Matrix3D class, you can add to or modify the existing transformation settings. Also, you can create a custom Matrix3D object, set the custom Matrix3D object's transformation elements, and then assign the new Matrix3D object to the display object using the transform.matrix property.

To modify a perspective projection of the stage or root object: use the transform.matrix property of the root display object to gain access to the PerspectiveProjection object. Or, apply different perspective projection properties to a display object by setting the perspective projection properties of the display object's parent. The child display object inherits the new properties. Specifically, create a PerspectiveProjection object and set its properties, then assign the PerspectiveProjection object to the perspectiveProjection property of the parent display object's transform property. The specified projection transformation then applies to all the display object's three-dimensional children.

Since both PerspectiveProjection and Matrix3D objects perform perspective transformations, do not assign both to a display object at the same time. Use the PerspectiveProjection object for focal length and projection center changes. For more control over the perspective transformation, create a perspective projection Matrix3D object.