commonMain.jetbrains.datalore.base.spatial.projections.AzimuthalEqualAreaProjection.kt Maven / Gradle / Ivy

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/*
 * Copyright (c) 2022. JetBrains s.r.o.
 * Use of this source code is governed by the MIT license that can be found in the LICENSE file.
 */

package jetbrains.datalore.base.spatial.projections

import kotlin.math.asin
import kotlin.math.sqrt

internal class AzimuthalEqualAreaProjection : AzimuthalBaseProjection() {
    override fun scale(cxcy: Double): Double = sqrt(2.0 / (1.0 + cxcy))
    override fun angle(z: Double): Double = 2.0 * asin(z / 2.0)
}