Transformations

Geometrical transformations

The following geometrical transformations are predefined in IPKISS. They can be used to transform (i.e., translate/rotate) geometrical elements and layout instances.

IdentityTransform	Transform that leaves an object unchanged.
Translation	Translation transform: move for a given translation (x, y).
Rotation	Rotation around point rotation_center over a given angle rotation (in degrees).
VMirror	Vertical mirror around an axis or plane with constant y.
HMirror	Horizontal mirror around an axis or plane with constant x.
CMirror	Mirror around point mirror_center (= 180 degree turn).
Stretch	Non-homothetic scaling.
Magnification	Scaling transformation with respect to a given point magnification_center, magnifying by magnification.
NoDistortTransform	A homothetic transformation that does not distort the item it is applied to (angle conservation)

Transformable objects

An object type which can be transformed (like a Shape or an Element) is a Transformable. There are a few different types of transformables in IPKISS, depending on whether the object accepts transformations that can distort (magnification) and on whether the transformation is applied directly or rather stored and applied when some attribute of the object is accessed.

Transformable	object that can be transformed
StoredTransformable	transformable that stores its transforms
StoredNoDistortTransformable	transformable that stores its homothetic transforms