SashegDev
874b6f20c2
Основа — Horizon (MIT). История апстрима не переносится: этот репозиторий ведёт свою.
23 lines
1.3 KiB
Markdown
23 lines
1.3 KiB
Markdown
# Vertical anchors
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Horizon implements the pinned Java Edition **26.3** vertical anchors: absolute,
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above bottom, below top and relative to sea level. Runtime resolution preserves
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signed integer wrapping. Codec parsing and encoding enforce the vanilla field
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range, preserve decimal truncation and integer wrapping, and follow the nested
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exclusive alternatives even when multiple fields appear in one object.
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`WorldGenerationContext` carries the minimum, height and sea level. Its generator
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adapter chooses the larger minimum and smaller height independently, matching
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vanilla; this differs from intersecting the vertical intervals.
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Run `python3 tools/test_anchor_parity.py`. The
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[local report](../benchmarks/rust-anchor-2026-10-06/scoped-parity.json) records
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**181,632 matching output lines per reference JAR**, across **192 fixtures**,
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**74,112 codec inputs** and **107,328 runtime anchors**. The original Java
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transport calls the actual codecs, helper constructors and generation context,
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including the native noise-based chunk generator for bounds comparisons.
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Sources and fixtures are hash-checked before publishing results. Raw reference
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output stays under `.local`. These tests cover anchor behavior and the three
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context values, not complete material rules, level access or JSON diagnostic text.
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