ComputeY component for a circular recyclerview

computeY.kt

private fun computeYComponent(viewCenterX: Float,
                              h: Float): Pair<Int, Double> {
    val screenWidth = context.resources.displayMetrics.widthPixels
    val s = screenWidth.toDouble() / 2
    val radius = (h * h + s * s) / (h * 2)

    val xScreenFraction = viewCenterX.toDouble() / screenWidth.toDouble()
    val beta = acos(s / radius)

    val alpha = beta + (xScreenFraction * (Math.PI - (2 * beta)))
    val yComponent = radius - (radius * sin(alpha))

    return Pair(yComponent.toInt(), alpha)
}