96 lines
2.7 KiB
Go
96 lines
2.7 KiB
Go
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package mesh
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import (
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"path/filepath"
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"testing"
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"mc/internal/block"
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"mc/internal/chunk"
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)
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// loadReg 加载注册表。
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func loadReg(t *testing.T) *block.Registry {
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t.Helper()
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r, err := block.Load(filepath.Join("..", "..", "assets", "config", "blocks.json"))
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if err != nil {
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t.Fatalf("加载注册表失败: %v", err)
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}
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return r
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}
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// airNb 邻居查询：全部视为空气（不剔除任何面）。
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func airNb(x, y, z int32) block.State { return block.Air }
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// dummyUV 固定 UV（测试不关心贴图坐标）。
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func dummyUV(key string) (float32, float32, float32, float32, bool) {
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return 0, 0, 1, 1, true
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}
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// TestSingleBlock 单方块 6 面全生成：24 顶点（6 面 × 4 顶点四边形）。
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func TestSingleBlock(t *testing.T) {
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reg := loadReg(t)
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stone, _ := reg.ID("stone")
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c := chunk.New(0, 0)
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c.Fill(0, 0, 0, block.NewState(stone, 0))
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c.SetBlockLight(0, 0, 0, 10)
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b := NewBuilder(reg, dummyUV)
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m := b.Build(c, airNb)
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if len(m.Opaque) != 24 {
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t.Fatalf("不透明顶点期望 24，实际 %d", len(m.Opaque))
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}
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if len(m.Cutout) != 0 || len(m.Translucent) != 0 {
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t.Fatalf("其他通道应为空: cutout=%d translucent=%d", len(m.Cutout), len(m.Translucent))
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}
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// 顶点光照传递
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for _, v := range m.Opaque {
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if v.Block != 10 {
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t.Fatalf("顶点方块光期望 10，实际 %d", v.Block)
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}
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}
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}
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// TestFaceCulling 相邻不透明方块剔除共享面：2 块相邻 → 各 5 面 → 40 顶点。
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func TestFaceCulling(t *testing.T) {
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reg := loadReg(t)
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stone, _ := reg.ID("stone")
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c := chunk.New(0, 0)
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c.Fill(0, 0, 0, block.NewState(stone, 0))
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c.Fill(1, 0, 0, block.NewState(stone, 0))
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// 邻居查询：跨区块查空气，区块内查实际方块
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nb := func(x, y, z int32) block.State {
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if x < 0 || x >= 16 || y < 0 || y >= chunk.Height || z < 0 || z >= 16 {
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return block.Air
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}
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return c.Block(int(x), int(y), int(z))
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}
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b := NewBuilder(reg, dummyUV)
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m := b.Build(c, nb)
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if len(m.Opaque) != 40 {
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t.Fatalf("面剔除后顶点期望 40，实际 %d", len(m.Opaque))
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}
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}
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// TestChannels 透明分类：火把→cutout，水→translucent（渲染.md §6）。
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func TestChannels(t *testing.T) {
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reg := loadReg(t)
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torch, _ := reg.ID("torch")
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water, _ := reg.ID("water")
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c := chunk.New(0, 0)
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c.Fill(0, 0, 0, block.NewState(torch, 0))
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c.Fill(2, 0, 0, block.NewState(water, 0))
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b := NewBuilder(reg, dummyUV)
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m := b.Build(c, airNb)
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if len(m.Cutout) != 24 {
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t.Fatalf("火把 cutout 顶点期望 24，实际 %d", len(m.Cutout))
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}
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if len(m.Translucent) != 24 {
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t.Fatalf("水 translucent 顶点期望 24，实际 %d", len(m.Translucent))
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}
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if len(m.Opaque) != 0 {
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t.Fatalf("不应有不透明顶点，实际 %d", len(m.Opaque))
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}
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}
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