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Pin biome fitness against vanilla runtime

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This commit is contained in:
Daniar Mannanov 2026-08-10 23:59:22 +03:00
parent be8f030698
commit b11e6f14cb
5 changed files with 86 additions and 10 deletions
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41
internal/worldgen/biome_test.go
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@ -48,6 +48,32 @@ func TestParameterTableDistanceOffsetAndTies(t *testing.T) {
}
}
func TestFitnessVectorsAgainstVanillaRuntime(t *testing.T) {
zero := [AxisCount]ClimateRange{}
temperatureRange := zero
temperatureRange[0] = ClimateRange{Min: 0, Max: 10}
depthWeirdness := zero
depthWeirdness[4] = ClimateRange{Min: 20, Max: 20}
depthWeirdness[5] = ClimateRange{Min: 30, Max: 30}
for _, vector := range []struct {
name string
point TargetPoint
ranges [AxisCount]ClimateRange
offset int64
want int64
}{
{"inside", TargetPoint{Temperature: 5}, temperatureRange, 0, 0},
{"below", TargetPoint{Temperature: -3}, temperatureRange, 0, 9},
{"above", TargetPoint{Temperature: 14}, temperatureRange, 0, 16},
{"offset", TargetPoint{Temperature: 5}, temperatureRange, 7, 49},
{"depth-weirdness-order", TargetPoint{Depth: 23, Weirdness: 35}, depthWeirdness, 0, 34},
} {
if got := fitDistance(vector.point, vector.ranges, vector.offset); got != vector.want {
t.Errorf("%s fitness = %d, want vanilla runtime %d", vector.name, got, vector.want)
}
}
}
// TestFitDistanceZero confirms identical points are zero-distance and distinct
// points are positive; the exact value is not asserted to stay robust to
// representation choices.
@ -78,6 +104,21 @@ func TestRangeContains(t *testing.T) {
}
}
func TestContainsAllUsesVanillaAxisOrder(t *testing.T) {
var ranges [AxisCount]ClimateRange
for i := range ranges {
ranges[i] = ClimateRange{Min: 0, Max: 0}
}
ranges[4] = ClimateRange{Min: 20, Max: 20}
ranges[5] = ClimateRange{Min: 30, Max: 30}
if !containsAll(ranges, TargetPoint{Depth: 20, Weirdness: 30}) {
t.Fatal("depth/weirdness ranges were not matched in vanilla order")
}
if containsAll(ranges, TargetPoint{Depth: 30, Weirdness: 20}) {
t.Fatal("accepted swapped depth/weirdness axes")
}
}
// TestSampleColumnDeterministic verifies the same seed/coords give the same
// biome and a different seed gives (almost certainly) a different one.
func TestSampleColumnDeterministic(t *testing.T) {