a7bb9496ae
Vanilla-faithful overworld generator (final_density + multi-noise biomes), full connection lifecycle (status/login/configuration/play), chunk streaming, creative block editing, and the protocol/nbt/registry infrastructure.
45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
package world
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import (
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"encoding/json"
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"math"
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"os"
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"strings"
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"strconv"
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"testing"
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)
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// TestVanillaParity compares our generated surface heights against heights
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// captured from the official server (seed 12345, normal terrain). Requires
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// /tmp/vanilla_ground.json from the capture step.
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func TestVanillaParity(t *testing.T) {
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raw, err := os.ReadFile("/tmp/vanilla_ground.json")
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if err != nil {
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t.Skip("no vanilla capture")
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}
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var van map[string][]int
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json.Unmarshal(raw, &van)
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gen := NewVanillaGenerator(12345)
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var total, exact, within1, within3 int
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var maxDiff int
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for key, vh := range van {
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parts := strings.Split(key, ",")
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cx, _ := strconv.Atoi(parts[0])
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cz, _ := strconv.Atoi(parts[1])
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ch := gen(int32(cx), int32(cz))
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oh := ch.columnHeights()
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for idx := 0; idx < 256; idx++ {
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ourY := int(oh[idx]) - 65
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d := int(math.Abs(float64(ourY - vh[idx])))
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total++
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if d == 0 { exact++ }
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if d <= 1 { within1++ }
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if d <= 3 { within3++ }
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if d > maxDiff { maxDiff = d }
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}
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}
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pct := func(n int) float64 { return 100 * float64(n) / float64(total) }
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t.Logf("columns=%d exact=%.1f%% within1=%.1f%% within3=%.1f%% maxDiff=%d",
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total, pct(exact), pct(within1), pct(within3), maxDiff)
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}
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