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[ci-force] add line about seed

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Alexander Wang 2023-01-04 13:29:10 -08:00
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README.md
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@ -66,6 +66,19 @@ setting the environment variable `D2_LAYOUT`.
D2_LAYOUT=tala d2 in.d2 out.svg
```
### Seeds
Optimal placements of nodes that minimizes distance and crossings is an NP-hard problem.
TALA searches with heuristics to get an approximation. This search space has some
randomness at each step. Choosing a different seed for this randomness can have signficant
impact on the overall layout, as it may converge on an entirely different one.
For advanced usage of TALA, you may specify the seed to get a different layout:
```d2
d2 --layout tala --tala-seed 44 input.d2
```
### Add API token (optional)
You may skip this step if you are just evaluating.