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Does anyone have a handy link for 3d &lt;&gt; 1d array index conversions? Google only surfaces the common 2d&lt;&gt;1d...

I basically need to get x,y,z coordinates from a given 1d array index

In case anyone else looks for it:
```    val z: Int = i / (width * height)
    val y: Int = (i - z * width * height) / width
    val x: Int = i - width * (y + height * z)```

What you probablywant is a strided arrays. They are used both in Multik and KMath. Here is a default implementaion: <https://github.com/mipt-npm/kmath/blob/8974164ec05dcfa5feab830cfa8223291e1dbb79/kmath-core/src/commonMain/kotlin/space/kscience/kmath/nd/ShapeIndexer.kt#L69|https://github.com/mipt-npm/kmath/blob/8974164ec05dcfa5feab830cfa8223291e1dbb79/km[…]e/src/commonMain/kotlin/space/kscience/kmath/nd/ShapeIndexer.kt>

In Multik they have fixed strides implementation: <https://github.com/Kotlin/multik/blob/develop/multik-api/src/commonMain/kotlin/org/jetbrains/kotlinx/multik/ndarray/data/NDArrayIterator.kt>

There a different ways to implement strides (row-wise, column-wise, etc.). You need to choose one.