ScaleTo

ScaleTo is a function or utility found in many graphics, animation, and game development libraries. It animates the scaling of an object from its current size to a target size over a specified duration. In practice, scaleTo is usually implemented as a tween or animation block that updates the object's scale properties on each frame, producing a smooth resizing effect.

How it works and common options: A typical scaleTo interface accepts a target scale value, a duration, and optional parameters such as easing, delay, and a completion callback. Some implementations support relative scaling, where the target is interpreted as a multiplier of the current scale, rather than an absolute value. Non-uniform scaling is also common, allowing separate targets for the x and y scales. The operation often preserves or adjusts the transform origin or anchor point to control how the resize appears on screen.

Implementation notes: ScaleTo interpolates between the start and end scale using an easing function, updating the object's scaleX and scaleY (or a single uniform scale) over time. It can be combined with other transforms and may provide cancellation or chaining capabilities. Some engines offer scaleTo equivalents through tweens, timelines, or CSS transforms rather than a dedicated function.

Usage considerations: Maintain aspect ratio by using a single uniform scale when appropriate, and be mindful of how scaling interacts with layout, hit-testing, or child elements. Performance considerations include avoiding excessive or chained scale animations on complex scenes. ScaleTo remains a common and portable pattern across 2D and 3D environments for creating resize effects.