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Create_schematic documentation: Update for per-node force-place
The probability list has to also encode per-node force-place.
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@ -2847,18 +2847,25 @@ These functions return the leftover itemstack.
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### Schematics
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* `minetest.create_schematic(p1, p2, probability_list, filename, slice_prob_list)`
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* Create a schematic from the volume of map specified by the box formed by p1 and p2.
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* Apply the specified probability values to the specified nodes in `probability_list`.
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* Apply the specified probability and per-node force-place to the specified nodes
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according to the `probability_list`.
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* `probability_list` is an array of tables containing two fields, `pos` and `prob`.
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* `pos` is the 3D vector specifying the absolute coordinates of the
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node being modified,
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* `prob` is the integer value from `0` to `255` of the probability (see: Schematic specifier).
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* `prob` is an integer value from `0` to `255` that encodes probability and
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per-node force-place. Probability has levels 0-127, then 128 is added to
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encode per-node force-place.
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For probability stated as 0-255, divide by 2 and round down to get values
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0-127, then add 128 to apply per-node force-place.
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* If there are two or more entries with the same pos value, the
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last entry is used.
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* If `pos` is not inside the box formed by `p1` and `p2`, it is ignored.
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* If `probability_list` equals `nil`, no probabilities are applied.
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* Slice probability works in the same manner, except takes a field
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called `ypos` instead which
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indicates the y position of the slice with a probability applied.
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* Apply the specified probability to the specified horizontal slices according to the
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`slice_prob_list`.
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* `slice_prob_list` is an array of tables containing two fields, `ypos` and `prob`.
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* `ypos` indicates the y position of the slice with a probability applied,
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the lowest slice being `ypos = 0`.
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* If slice probability list equals `nil`, no slice probabilities are applied.
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* Saves schematic in the Minetest Schematic format to filename.
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