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https://github.com/oliverbooth/X10D
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feat: add MathUtility.Sawtooth (#60)
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@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
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- X10D: Added `MathUtility.Bias(float, float)` and `MathUtility.Bias(double, double)`.
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- X10D: Added `MathUtility.ExponentialDecay(float, float, float)` and `MathUtility.ExponentialDecay(double, double, double)`.
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- X10D: Added `MathUtility.InverseLerp(float, float, float)` and `MathUtility.InverseLerp(double, double, double)`.
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- X10D: Added `MathUtility.Sawtooth(float)` and `MathUtility.Sawtooth(double)`.
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- X10D: Added `MathUtility.ScaleRange(float, float, float, float, float)`
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and `MathUtility.ScaleRange(double, double, double, double, double)`
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- X10D: Added `MathUtility.Sigmoid(float)` and `MathUtility.Sigmoid(double)`.
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@ -163,6 +163,72 @@ public class MathUtilityTests
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Assert.AreEqual(1.0f, floatResult);
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}
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[TestMethod]
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public void Sawtooth_ShouldReturn0Point5_Given0Point5AsDouble()
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{
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const double value = 0.5;
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const double expected = 0.5;
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double actual = MathUtility.Sawtooth(value);
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Assert.AreEqual(expected, actual, 1e-6);
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}
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[TestMethod]
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public void Sawtooth_ShouldReturn0Point5_Given0Point5AsSingle()
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{
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const float value = 0.5f;
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const float expected = 0.5f;
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float actual = MathUtility.Sawtooth(value);
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Assert.AreEqual(expected, actual, 1e-6f);
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}
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[TestMethod]
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public void Sawtooth_ShouldReturn0Point5_Given1Point5AsDouble()
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{
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const double value = 1.5;
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const double expected = 0.5;
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double actual = MathUtility.Sawtooth(value);
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Assert.AreEqual(expected, actual, 1e-6);
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}
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[TestMethod]
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public void Sawtooth_ShouldReturn0Point5_Given1Point5AsSingle()
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{
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const float value = 1.5f;
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const float expected = 0.5f;
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float actual = MathUtility.Sawtooth(value);
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Assert.AreEqual(expected, actual, 1e-6f);
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}
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[TestMethod]
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public void Sawtooth_ShouldReturn0Point5_GivenNegative1Point5AsDouble()
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{
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const double value = -1.5;
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const double expected = 0.5;
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double actual = MathUtility.Sawtooth(value);
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Assert.AreEqual(expected, actual, 1e-6);
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}
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[TestMethod]
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public void Sawtooth_ShouldReturn0Point5_GivenNegative1Point5AsSingle()
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{
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const float value = -1.5f;
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const float expected = 0.5f;
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float actual = MathUtility.Sawtooth(value);
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Assert.AreEqual(expected, actual, 1e-6f);
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}
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[TestMethod]
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public void ScaleRangeDouble_ShouldScaleRange_GivenItsValues()
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{
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@ -287,6 +287,26 @@ public static class MathUtility
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return System.Math.Pow(value, 1.0 / gamma);
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}
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/// <summary>
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/// Returns the incremental sawtooth wave of a given value.
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/// </summary>
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/// <param name="value">The value to calculate.</param>
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/// <returns>The sawtooth wave of the given value.</returns>
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public static float Sawtooth(float value)
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{
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return (value - MathF.Floor(value));
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}
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/// <summary>
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/// Returns the incremental sawtooth wave of a given value.
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/// </summary>
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/// <param name="value">The value to calculate.</param>
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/// <returns>The sawtooth wave of the given value.</returns>
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public static double Sawtooth(double value)
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{
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return (value - System.Math.Floor(value));
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}
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/// <summary>
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/// Converts a value from being a percentage of one range, to being the same percentage in a new range.
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/// </summary>
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