Package com.airbnb.lottie.animation.content

Class RoundedCornersContent

java.lang.Object

com.airbnb.lottie.animation.content.RoundedCornersContent

All Implemented Interfaces:

Content, ShapeModifierContent, BaseKeyframeAnimation.AnimationListener

public class RoundedCornersContent
extends Object
implements ShapeModifierContent, BaseKeyframeAnimation.AnimationListener

Constructor Summary

Constructors

Constructor	Description
RoundedCornersContent(LottieDrawable lottieDrawable, BaseLayer layer, RoundedCorners roundedCorners)

Method Summary

Modifier and Type	Method	Description
String	getName()
BaseKeyframeAnimation<Float,Float>	getRoundedCorners()
ShapeData	modifyShape(ShapeData startingShapeData)	Rounded corner algorithm: Iterate through each vertex.
void	onValueChanged()
void	setContents(List<Content> contentsBefore, List<Content> contentsAfter)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RoundedCornersContent

public RoundedCornersContent(LottieDrawable lottieDrawable,
                             BaseLayer layer,
                             RoundedCorners roundedCorners)

Method Detail

getName

public String getName()

Specified by:

getName in interface Content

onValueChanged

public void onValueChanged()

Specified by:

onValueChanged in interface BaseKeyframeAnimation.AnimationListener

setContents

public void setContents(List<Content> contentsBefore,
                        List<Content> contentsAfter)

Specified by:

setContents in interface Content

getRoundedCorners

public BaseKeyframeAnimation<Float,Float> getRoundedCorners()

modifyShape

public ShapeData modifyShape(ShapeData startingShapeData)

Rounded corner algorithm: Iterate through each vertex. If a vertex is a sharp corner, it rounds it. If a vertex has control points, it is already rounded, so it does nothing.

To round a vertex: Split the vertex into two. Move vertex 1 directly towards the previous vertex. Set vertex 1's in control point to itself so it is not rounded on that side. Extend vertex 1's out control point towards the original vertex.

Repeat for vertex 2: Move vertex 2 directly towards the next vertex. Set vertex 2's out point to itself so it is not rounded on that side. Extend vertex 2's in control point towards the original vertex.

The distance that the vertices and control points are moved are relative to the shape's vertex distances and the roundedness set in the animation.

Specified by:

modifyShape in interface ShapeModifierContent