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InElastic and OutElastic

master
Evan Hemsley 2019-10-30 18:55:45 -07:00
parent a26aa29721
commit 87505e197b
2 changed files with 154 additions and 0 deletions
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78
Easing/Easing.cs
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@ -601,5 +601,83 @@ namespace MoonTools.Core.Easing
public static double OutInCirc(double t) => NormalizedTime(OutInCirc, t);
public static double OutInCirc(double time, double start, double end) => TimeRange(OutInCirc, time, start, end);
public static double OutInCirc(double t, double b, double c, double d) => OutIn(OutCirc, InCirc, t, b, c, d);
// IN ELASTIC
// a: amplitude
// p: period
public static double InElasticNormalized(double t) => InElastic(t, 0, 1, 1);
public static double InElasticNormalized(double t, double a) => InElastic(t, 0, 1, 1, a);
public static double InElasticNormalized(double t, double a, double p) => InElastic(t, 0, 1, 1, a, p);
public static double InElasticTimeRange(double time, double start, double end) => start + (end - start) * InElasticNormalized((time - start) / (end - start));
public static double InElasticTimeRange(double time, double start, double end, double a) => start + (end - start) * InElasticNormalized((time - start) / (end - start), a);
public static double InElasticTimeRange(double time, double start, double end, double a, double p) => start + (end - start) * InElasticNormalized((time - start) / (end - start), a, p);
public static double InElastic(double t, double b, double c, double d, double? a = null, double? p = null)
{
CheckTime(t, d);
if (t == 0) { return b; }
t = t / d;
if (t == 1) { return b + c; }
if (!p.HasValue) { p = d * 0.3; }
double s;
if (!a.HasValue || a.Value < Math.Abs(c))
{
a = c;
s = p.Value / 4;
}
else
{
s = p.Value / (2 * Math.PI) * Math.Asin(c / a.Value);
}
t = t - 1;
return -(a.Value * Math.Pow(2, 10 * t) * Math.Sin((t * d - s) * (2 * Math.PI) / p.Value)) + b;
}
// OUT ELASTIC
public static double OutElasticNormalized(double t) => OutElastic(t, 0, 1, 1);
public static double OutElasticNormalized(double t, double a) => OutElastic(t, 0, 1, 1, a);
public static double OutElasticNormalized(double t, double a, double p) => OutElastic(t, 0, 1, 1, a, p);
public static double OutElasticTimeRange(double time, double start, double end) => start + (end - start) * OutElasticNormalized((time - start) / (end - start));
public static double OutElasticTimeRange(double time, double start, double end, double a) => start + (end - start) * OutElasticNormalized((time - start) / (end - start), a);
public static double OutElasticTimeRange(double time, double start, double end, double a, double p) => start + (end - start) * OutElasticNormalized((time - start) / (end - start), a, p);
public static double OutElastic(double t, double b, double c, double d, double? a = null, double? p = null)
{
CheckTime(t, d);
if (t == 0) { return b; }
t = t / d;
if (t == 1) { return b + c; }
if (!p.HasValue) { p = d * 0.3; }
double s;
if (!a.HasValue || a.Value < Math.Abs(c))
{
a = c;
s = p.Value / 4;
}
else
{
s = p.Value / (2 * Math.PI) * Math.Asin(c / a.Value);
}
return a.Value * Math.Pow(2, -10 * t) * Math.Sin((t * d - s) * (2 * Math.PI) / p.Value) + c + b;
}
}
}

76
Test/Easing.cs
View File

@ -890,6 +890,82 @@ namespace Test
CheckDoubleArguments(Easing.OutInCirc, Easing.OutInCirc);
}
[Test]
public void InElasticDefault()
{
Easing.InElasticNormalized(0.25).Should().BeApproximately(-0.0055242717280199, 0.001);
Easing.InElasticNormalized(0.5).Should().BeApproximately(-0.015625, 0.001);
Easing.InElasticNormalized(0.75).Should().BeApproximately(0.088388347648318, 0.001);
Easing.InElasticTimeRange(3, 2, 6).Should().BeApproximately(1.97790291309, 0.001);
Easing.InElasticTimeRange(4, 2, 6).Should().BeApproximately(1.9375, 0.001);
Easing.InElasticTimeRange(5, 2, 6).Should().BeApproximately(2.35355339059, 0.001);
CheckDoubleArguments(Easing.InElasticNormalized, Easing.InElasticNormalized);
}
[Test]
public void InElasticWithA()
{
Easing.InElasticNormalized(0.25, 10).Should().BeApproximately(-0.0055242717280198, 0.001);
Easing.InElasticNormalized(0.5, 10).Should().BeApproximately(-0.28490137405647, 0.001);
Easing.InElasticNormalized(0.75, 10).Should().BeApproximately(-1.4348688532209, 0.001);
Easing.InElasticTimeRange(3, 2, 6, 10).Should().BeApproximately(1.97790291309, 0.001);
Easing.InElasticTimeRange(4, 2, 6, 10).Should().BeApproximately(0.860394503774, 0.001);
Easing.InElasticTimeRange(5, 2, 6, 10).Should().BeApproximately(-3.73947541288, 0.001);
}
[Test]
public void InElasticWithAAndP()
{
Easing.InElasticNormalized(0.25, 10, 0.5).Should().BeApproximately(-0.0055242717280199, 0.001);
Easing.InElasticNormalized(0.5, 10, 0.5).Should().BeApproximately(0.03125, 0.001);
Easing.InElasticNormalized(0.75, 10, 0.5).Should().BeApproximately(-0.17677669529664, 0.001);
Easing.InElasticTimeRange(3, 2, 6, 10, 0.5).Should().BeApproximately(1.97790291309, 0.001);
Easing.InElasticTimeRange(4, 2, 6, 10, 0.5).Should().BeApproximately(2.125, 0.001);
Easing.InElasticTimeRange(5, 2, 6, 10, 0.5).Should().BeApproximately(1.29289321881, 0.001);
}
[Test]
public void OutElasticDefault()
{
Easing.OutElasticNormalized(0.25).Should().BeApproximately(0.91161165235168, 0.001);
Easing.OutElasticNormalized(0.5).Should().BeApproximately(1.015625, 0.001);
Easing.OutElasticNormalized(0.75).Should().BeApproximately(1.005524271728, 0.001);
Easing.OutElasticTimeRange(3, 2, 6).Should().BeApproximately(5.64644660941, 0.001);
Easing.OutElasticTimeRange(4, 2, 6).Should().BeApproximately(6.0625, 0.001);
Easing.OutElasticTimeRange(5, 2, 6).Should().BeApproximately(6.02209708691, 0.001);
CheckDoubleArguments(Easing.OutElasticNormalized, Easing.OutElasticNormalized);
}
[Test]
public void OutElasticWithA()
{
Easing.OutElasticNormalized(0.25, 10).Should().BeApproximately(-0.61164554851756, 0.001);
Easing.OutElasticNormalized(0.5, 10).Should().BeApproximately(0.74634862594353, 0.001);
Easing.OutElasticNormalized(0.75, 10).Should().BeApproximately(1.005524271728, 0.001);
Easing.OutElasticTimeRange(3, 2, 6, 10).Should().BeApproximately(-0.44658219407, 0.001);
Easing.OutElasticTimeRange(4, 2, 6, 10).Should().BeApproximately(4.98539450378, 0.001);
Easing.OutElasticTimeRange(5, 2, 6, 10).Should().BeApproximately(6.02209708691, 0.001);
}
[Test]
public void OutElasticWithAAndP()
{
Easing.OutElasticNormalized(0.25, 10, 0.5).Should().BeApproximately(1.1767766952966, 0.001);
Easing.OutElasticNormalized(0.5, 10, 0.5).Should().BeApproximately(0.96875, 0.001);
Easing.OutElasticNormalized(0.75, 10, 0.5).Should().BeApproximately(1.005524271728, 0.001);
Easing.OutElasticTimeRange(3, 2, 6, 10, 0.5).Should().BeApproximately(6.70710678118, 0.001);
Easing.OutElasticTimeRange(4, 2, 6, 10, 0.5).Should().BeApproximately(5.875, 0.001);
Easing.OutElasticTimeRange(5, 2, 6, 10, 0.5).Should().BeApproximately(6.02209708691, 0.001);
}
}
}
}