FromToByAnimation
An animation that starts, stops, or increments by a specific value.
Declaration
struct FromToByAnimation<Value> where Value : AnimatableDataOverview
To animate an entity or scene, this structure gradually changes a parameter’s value over time. You can specify a from value, which represents the animated property’s initial value at the beginning of the animation. You can also specify a to value, which determines the value of the property at the end of the animation. Alternatively, you can set a by value. The framework adds the by value to the property’s initial state to calculate the value at the end of the animation.
To specify the property that this struct animates, define bindTarget in the intializer,
Configure the animation inputs
This animation supports varying input combinations, which exhibit the following behavior. When you specify:
- A from and to value
The animation interpolates between from and to, and ignores the by value.
- A from and by value
The animation interpolates between from and the sum of from and by.
- Only a from value
The animation interpolates between from and the default source value.
- Only a to value
The animation interpolates between the default source value and to.
- A to and by value
The animation starts at by subtracted from _to _and completes at to.
- Only a by value
The animation interpolates between the default source value and the sum of default source value and by.
- No from, to, or by value
The animation interpolates between the default source value and the default target value.
The default source value is the base value of the of animated property. If multiple animations target the property, then the framework observes the output of the previous animation as the subsequent animation’s default source value. The default target value is the base value of the animated property.
Topics
Creating an animation
init(name:from:to:by:duration:timing:isAdditive:bindTarget:blendLayer:repeatMode:fillMode:trimStart:trimEnd:trimDuration:offset:delay:speed:)init(jointNames:name:isScaleAnimated:isRotationAnimated:isTranslationAnimated:from:to:by:duration:timing:isAdditive:bindTarget:blendLayer:repeatMode:fillMode:trimStart:trimEnd:trimDuration:offset:delay:speed:)