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Type-safe angles

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Alexander Nozik 2022-08-21 11:39:17 +03:00
parent a8182fad23
commit 6111c673ee
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kmath-geometry/src/commonMain/kotlin/space/kscience/kmath/geometry/angles.kt Normal file
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/*
* Copyright 2018-2021 KMath contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package space.kscience.kmath.geometry
import kotlin.jvm.JvmInline
import kotlin.math.PI
public sealed interface Angle {
public fun toRadians(): Radians
public fun toDegrees(): Degrees
public operator fun plus(other: Angle): Angle
public operator fun minus(other: Angle): Angle
public operator fun times(other: Number): Angle
public operator fun div(other: Number): Angle
public operator fun unaryMinus(): Angle
}
/**
* Type safe radians
*/
@JvmInline
public value class Radians(public val value: Double) : Angle {
override fun toRadians(): Radians = this
override fun toDegrees(): Degrees = Degrees(value * 180 / PI)
public override fun plus(other: Angle): Radians = Radians(value + other.toRadians().value)
public override fun minus(other: Angle): Radians = Radians(value - other.toRadians().value)
public override fun times(other: Number): Radians = Radians(value + other.toDouble())
public override fun div(other: Number): Radians = Radians(value / other.toDouble())
public override fun unaryMinus(): Radians = Radians(-value)
}
public fun sin(angle: Angle): Double = kotlin.math.sin(angle.toRadians().value)
public fun cos(angle: Angle): Double = kotlin.math.cos(angle.toRadians().value)
public fun tan(angle: Angle): Double = kotlin.math.tan(angle.toRadians().value)
public val Number.radians: Radians get() = Radians(toDouble())
/**
* Type safe degrees
*/
@JvmInline
public value class Degrees(public val value: Double) : Angle {
override fun toRadians(): Radians = Radians(value * PI / 180)
override fun toDegrees(): Degrees = this
public override fun plus(other: Angle): Degrees = Degrees(value + other.toDegrees().value)
public override fun minus(other: Angle): Degrees = Degrees(value - other.toDegrees().value)
public override fun times(other: Number): Degrees = Degrees(value + other.toDouble())
public override fun div(other: Number): Degrees = Degrees(value / other.toDouble())
public override fun unaryMinus(): Degrees = Degrees(-value)
}
public val Number.degrees: Degrees get() = Degrees(toDouble())
/**
* A holder class for Pi representation in radians and degrees
*/
public object Pi {
public val radians: Radians = Radians(PI)
public val degrees: Degrees = radians.toDegrees()
}
public object PiTimes2 {
public val radians: Radians = Radians(2 * PI)
public val degrees: Degrees = radians.toDegrees()
}
public object PiDiv2 {
public val radians: Radians = Radians(PI / 2)
public val degrees: Degrees = radians.toDegrees()
}