[mlpack-git] [mlpack/mlpack] Spill trees (#747)

[MarcosPividori]

> +  }
> +
> +  std::vector<size_t> leftPoints, rightPoints;
> +  // Split the node.
> +  overlappingNode = SplitPoints(tau, rho, points, leftPoints, rightPoints);
> +
> +  // We don't need the information in points, so lets clean it.
> +  std::vector<size_t>().swap(points);
> +
> +  // Now we will recursively split the children by calling their constructors
> +  // (which perform this splitting process).
> +  left = new SpillTree(this, leftPoints, tau, maxLeafSize, rho);
> +  right = new SpillTree(this, rightPoints, tau, maxLeafSize, rho);
> +
> +  // Update count number, to represent the number of descendant points.
> +  count = left->NumDescendants() + right->NumDescendants();

Yeah, I understand! Ok, so we want `Descendant(i)` to represent a unique points from the dataset. I will think about this!

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