MorphEngine class abstract final

Unified pure-function interpolation engine for all morph transitions.

Replaces duplicated logic previously spread across CardMorphTween and RectMorphTween. All methods are static, side-effect free, and deterministic: visualProperty = f(progress).

progress 0.0 represents the source/collapsed state. progress 1.0 represents the target/expanded state.

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

lerp(double progress, double a, double b) → double
Linear interpolation between a and b at progress (clamped).
morphBlur(double progress, {double maxBlur = 6.0}) → double
Background blur sigma.
morphElevation(double progress, {double startElevation = 4.0, double peakElevation = 16.0, double endElevation = 0.0}) → double
Shadow elevation that peaks mid-transition for a lift effect.
morphHeight(double progress, double startHeight, double endHeight) → double
Interpolated height.
morphLeft(double progress, double startLeft, double endLeft) → double
Interpolated left position.
morphRadius(double progress, {double startRadius = 16.0, double endRadius = 0.0}) → double
Interpolated corner radius from startRadius → endRadius.
morphRect(double progress, Rect start, Rect end) → Rect
Interpolated rect from start to end at progress.
morphScale(double progress, {double minScale = 0.95}) → double
Background scale (slight zoom-out as the overlay rises).
morphScrim(double progress, {double maxOpacity = 0.5}) → double
Scrim (barrier) opacity behind the morphing container.
morphTop(double progress, double startTop, double endTop) → double
Interpolated top position.
morphWidth(double progress, double startWidth, double endWidth) → double
Interpolated width.
sourceContentOpacity(double progress, {double fadeStart = 0.0, double fadeEnd = 0.4}) → double
Opacity of the source/collapsed content.
targetContentOpacity(double progress, {double fadeStart = 0.35, double fadeEnd = 0.7}) → double
Opacity of the target/expanded content.