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Unified Diff: packages/charted/lib/core/interpolators/easing.dart

Issue 1521693002: Roll Observatory deps (charted -> ^0.3.0) (Closed) Base URL: https://chromium.googlesource.com/external/github.com/dart-lang/observatory_pub_packages.git@master
Patch Set: Created 5 years ago
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Index: packages/charted/lib/core/interpolators/easing.dart
diff --git a/packages/charted/lib/core/interpolators/easing.dart b/packages/charted/lib/core/interpolators/easing.dart
index 2b4bdec1193843ea0ab713c660bc52f5c91c1c3f..e80bbd6f533b77262a00e6d1dc6b2e80e3c6d326 100644
--- a/packages/charted/lib/core/interpolators/easing.dart
+++ b/packages/charted/lib/core/interpolators/easing.dart
@@ -8,21 +8,21 @@
part of charted.core.interpolators;
-const String EASE_TYPE_LINEAR = 'linear';
-const String EASE_TYPE_POLY = 'poly';
-const String EASE_TYPE_QUAD = 'quad';
-const String EASE_TYPE_CUBIC = 'cubic';
-const String EASE_TYPE_SIN = 'sin';
-const String EASE_TYPE_EXP = 'exp';
-const String EASE_TYPE_CIRCLE = 'circle';
-const String EASE_TYPE_ELASTIC = 'elastic';
-const String EASE_TYPE_BACK = 'back';
-const String EASE_TYPE_BOUNCE = 'bounce';
-
-const String EASE_MODE_IN = 'in';
-const String EASE_MODE_OUT = 'out';
-const String EASE_MODE_IN_OUT = 'in-out';
-const String EASE_MODE_OUT_IN = 'out-in';
+const String EASE_TYPE_LINEAR = 'linear';
+const String EASE_TYPE_POLY = 'poly';
+const String EASE_TYPE_QUAD = 'quad';
+const String EASE_TYPE_CUBIC = 'cubic';
+const String EASE_TYPE_SIN = 'sin';
+const String EASE_TYPE_EXP = 'exp';
+const String EASE_TYPE_CIRCLE = 'circle';
+const String EASE_TYPE_ELASTIC = 'elastic';
+const String EASE_TYPE_BACK = 'back';
+const String EASE_TYPE_BOUNCE = 'bounce';
+
+const String EASE_MODE_IN = 'in';
+const String EASE_MODE_OUT = 'out';
+const String EASE_MODE_IN_OUT = 'in-out';
+const String EASE_MODE_OUT_IN = 'out-in';
/// [EasingFunction] manipulates progression of an animation. The returned
/// value is passed to an [Interpolator] to generate intermediate state.
@@ -33,8 +33,8 @@ typedef num EasingFunction(num t);
typedef EasingFunction EasingModeFunction(EasingFunction fn);
/// Creates an easing function based on type and mode.
-EasingFunction easingFunctionByName(
- String type, [String mode = EASE_MODE_IN, List params]) {
+EasingFunction easingFunctionByName(String type,
+ [String mode = EASE_MODE_IN, List params]) {
const Map easingTypes = const {
EASE_TYPE_LINEAR: identityFunction,
EASE_TYPE_POLY: easePoly,
@@ -47,21 +47,21 @@ EasingFunction easingFunctionByName(
EASE_TYPE_BACK: easeBack,
EASE_TYPE_BOUNCE: easeBounce
};
-
+
const Map easingModes = const {
EASE_MODE_IN: identityFunction,
EASE_MODE_OUT: reverseEasingFn,
EASE_MODE_IN_OUT: reflectEasingFn,
EASE_MODE_OUT_IN: reflectReverseEasingFn
};
-
+
const Map customEasingFunctions = const {
- '$EASE_TYPE_CUBIC-$EASE_MODE_IN_OUT': easeCubicInOut
+ '$EASE_TYPE_CUBIC-$EASE_MODE_IN_OUT': easeCubicInOut
};
assert(easingTypes.containsKey(type));
assert(easingModes.containsKey(mode));
-
+
EasingFunction fn;
if (customEasingFunctions.containsKey('$type-$mode')) {
fn = Function.apply(customEasingFunctions['$type-$mode'], params);
@@ -72,18 +72,15 @@ EasingFunction easingFunctionByName(
return clampEasingFn(fn);
}
-
/// Clamps transition progress to stay between 0.0 and 1.0
EasingFunction clampEasingFn(EasingFunction f) =>
(t) => t <= 0 ? 0 : t >= 1 ? 1 : f(t);
-
//
// Implementation of easing modes.
//
-EasingFunction reverseEasingFn(EasingFunction f) =>
- (t) => 1 - f(1 - t);
+EasingFunction reverseEasingFn(EasingFunction f) => (t) => 1 - f(1 - t);
EasingFunction reflectEasingFn(EasingFunction f) =>
(t) => .5 * (t < .5 ? f(2 * t) : (2 - f(2 - 2 * t)));
@@ -91,7 +88,6 @@ EasingFunction reflectEasingFn(EasingFunction f) =>
EasingFunction reflectReverseEasingFn(EasingFunction f) =>
reflectEasingFn(reverseEasingFn(f));
-
//
// Implementation of easing function generators.
//
@@ -100,38 +96,33 @@ EasingFunction easePoly([e = 1]) => (t) => math.pow(t, e);
EasingFunction easeElastic([a = 1, p = 0.45]) {
var s = p / 2 * math.PI * math.asin(1 / a);
- return (t) => 1 + a * math.pow(2, -10 * t) *
- math.sin((t - s) * 2 * math.PI / p);
+ return (t) =>
+ 1 + a * math.pow(2, -10 * t) * math.sin((t - s) * 2 * math.PI / p);
}
-EasingFunction easeBack([s = 1.70158]) =>
- (num t) => t * t * ((s + 1) * t - s);
+EasingFunction easeBack([s = 1.70158]) => (num t) => t * t * ((s + 1) * t - s);
EasingFunction easeQuad() => (num t) => t * t;
EasingFunction easeCubic() => (num t) => t * t * t;
-EasingFunction easeCubicInOut() =>
- (num t) {
+EasingFunction easeCubicInOut() => (num t) {
if (t <= 0) return 0;
if (t >= 1) return 1;
- var t2 = t * t,
- t3 = t2 * t;
+ var t2 = t * t, t3 = t2 * t;
return 4 * (t < .5 ? t3 : 3 * (t - t2) + t3 - .75);
};
-EasingFunction easeSin() =>
- (num t) => 1 - math.cos(t * math.PI / 2);
+EasingFunction easeSin() => (num t) => 1 - math.cos(t * math.PI / 2);
-EasingFunction easeExp() =>
- (num t) => math.pow(2, 10 * (t - 1));
+EasingFunction easeExp() => (num t) => math.pow(2, 10 * (t - 1));
-EasingFunction easeCircle() =>
- (num t) => 1 - math.sqrt(1 - t * t);
+EasingFunction easeCircle() => (num t) => 1 - math.sqrt(1 - t * t);
-EasingFunction easeBounce() =>
- (num t) => t < 1 / 2.75 ?
- 7.5625 * t * t : t < 2 / 2.75 ?
- 7.5625 * (t -= 1.5 / 2.75) * t + .75 : t < 2.5 / 2.75 ?
- 7.5625 * (t -= 2.25 / 2.75) * t + .9375
- : 7.5625 * (t -= 2.625 / 2.75) * t + .984375;
+EasingFunction easeBounce() => (num t) => t < 1 / 2.75
+ ? 7.5625 * t * t
+ : t < 2 / 2.75
+ ? 7.5625 * (t -= 1.5 / 2.75) * t + .75
+ : t < 2.5 / 2.75
+ ? 7.5625 * (t -= 2.25 / 2.75) * t + .9375
+ : 7.5625 * (t -= 2.625 / 2.75) * t + .984375;
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