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Add vanilla parity harness and harden server boundaries

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This commit is contained in:
Daniar Mannanov 2026-08-10 22:52:44 +03:00
parent 1924cb5591
commit ca019756ec
25 changed files with 1118 additions and 217 deletions
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16
internal/world/biome_lookup.go
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@ -16,7 +16,7 @@ var biomeParametersJSON []byte
// rawParameter mirrors one entry of biome_parameters.json: a biome name plus its
// climate ranges. Each axis value is a [min, max] array; depth is normally a
// scalar (0.0 surface / 1.0 underground) but a few cave entries carry a [min,
// max] array, so it is decoded loosely (see depthScalar).
// max] array, so it is decoded loosely (see depthRange).
type rawParameter struct {
Biome string `json:"biome"`
Param struct {
@ -31,21 +31,20 @@ type rawParameter struct {
}
// depthRange extracts a depth band from a raw entry. It accepts a JSON number
// (mapped to the half-open band [v, v+1) so a scalar value matches exactly one
// integer depth layer), a single-element [v] array (same as the scalar), or a
// (mapped to the exact inclusive range [v,v]), a single-element [v] array, or a
// two-element [min, max] range (used by cave biomes like lush/dripstone_caves
// whose depth is [0.2, 0.9]). Returns ok=false only for malformed input.
func depthRange(v any) (worldgen.ClimateRange, bool) {
switch d := v.(type) {
case float64:
q := worldgen.Quantize(d)
return worldgen.ClimateRange{Min: q, Max: q + 1}, true
return worldgen.ClimateRange{Min: q, Max: q}, true
case []any:
switch len(d) {
case 1:
if f, ok := d[0].(float64); ok {
q := worldgen.Quantize(f)
return worldgen.ClimateRange{Min: q, Max: q + 1}, true
return worldgen.ClimateRange{Min: q, Max: q}, true
}
case 2:
lo, ok1 := d[0].(float64)
@ -59,8 +58,7 @@ func depthRange(v any) (worldgen.ClimateRange, bool) {
}
// biomeTable is the full biome parameter table (surface + underground twins +
// cave biomes), built once at init. The finder's range-contains check on the
// depth axis selects the correct layer per cell.
// cave biomes), built once at init.
var (
biomeTable *worldgen.ParameterTable
biomeTableOnce sync.Once
@ -92,7 +90,7 @@ func loadBiomeTable() *worldgen.ParameterTable {
// makeBiomeParameter converts a raw JSON entry into a BiomeParameter, mapping
// the [min,max] ranges to quantized ClimateRanges. depth is a ClimateRange
// (half-open band for scalar depths, explicit range for cave biomes).
// (exact range for scalar depths, explicit range for cave biomes).
func makeBiomeParameter(e rawParameter, depth worldgen.ClimateRange) worldgen.BiomeParameter {
qr := func(a [2]float64) worldgen.ClimateRange {
return worldgen.ClimateRange{Min: worldgen.Quantize(a[0]), Max: worldgen.Quantize(a[1])}
@ -105,7 +103,7 @@ func makeBiomeParameter(e rawParameter, depth worldgen.ClimateRange) worldgen.Bi
qr(e.Param.Continentalness),
qr(e.Param.Erosion),
qr(e.Param.Weirdness),
depth, // half-open band (scalar) or explicit range (cave biomes)
depth,
},
Offset: worldgen.Quantize(e.Param.Offset),
}