Add dynamic chunk lighting engine (vertical sky light + emissive blocks)

cmd/genlight/main.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+	f, err := os.Open("../../generated/reports/blocks.json")
+	if err != nil {
+		panic(err)
+	}
+	var data map[string]struct {
+		States []struct {
+			ID int `json:"id"`
+		} `json:"states"`
+	}
+	if err := json.NewDecoder(f).Decode(&data); err != nil {
+		panic(err)
+	}
+
+	opacity := make([]byte, 30000)
+	emission := make([]byte, 30000)
+
+	for name, block := range data {
+		op := byte(15)
+		em := byte(0)
+
+		if strings.Contains(name, "air") || strings.Contains(name, "glass") || strings.Contains(name, "leaves") || strings.Contains(name, "sapling") || strings.Contains(name, "flower") || strings.Contains(name, "grass") || strings.Contains(name, "fern") || strings.Contains(name, "torch") || strings.Contains(name, "lantern") || strings.Contains(name, "button") || strings.Contains(name, "pressure_plate") || strings.Contains(name, "rail") || strings.Contains(name, "ladder") || strings.Contains(name, "vine") || strings.Contains(name, "door") || strings.Contains(name, "trapdoor") || strings.Contains(name, "fence") || strings.Contains(name, "wall") || strings.Contains(name, "slab") || strings.Contains(name, "water") || strings.Contains(name, "ice") || strings.Contains(name, "snow") || strings.Contains(name, "carpet") || strings.Contains(name, "sign") || strings.Contains(name, "banner") || strings.Contains(name, "bed") || strings.Contains(name, "chest") || strings.Contains(name, "bell") || strings.Contains(name, "campfire") || strings.Contains(name, "chain") || strings.Contains(name, "coral") || strings.Contains(name, "end_rod") || strings.Contains(name, "glowstone") || strings.Contains(name, "lava") || strings.Contains(name, "magma") || strings.Contains(name, "sea_lantern") || strings.Contains(name, "shroomlight") || strings.Contains(name, "slime") || strings.Contains(name, "honey") {
+			op = 0
+		}
+        if strings.Contains(name, "water") || strings.Contains(name, "ice") {
+            op = 1
+        }
+        if strings.Contains(name, "leaves") {
+            op = 1
+        }
+		if name == "minecraft:glowstone" || name == "minecraft:sea_lantern" || name == "minecraft:shroomlight" || name == "minecraft:beacon" || name == "minecraft:end_rod" || strings.Contains(name, "lava") {
+			em = 15
+		}
+		if strings.Contains(name, "torch") || strings.Contains(name, "campfire") || strings.Contains(name, "lantern") || strings.Contains(name, "fire") {
+			em = 14
+		}
+
+		for _, state := range block.States {
+			if state.ID < len(opacity) {
+				opacity[state.ID] = op
+				emission[state.ID] = em
+			}
+		}
+	}
+
+	out, _ := os.Create("../../internal/world/light_data.go")
+	fmt.Fprintln(out, "package world")
+	fmt.Fprintln(out, "var blockOpacity = [29873]byte{")
+	for i := 0; i < 29873; i++ {
+		fmt.Fprintf(out, "%d,", opacity[i])
+	}
+	fmt.Fprintln(out, "}")
+	fmt.Fprintln(out, "var blockEmission = [29873]byte{")
+	for i := 0; i < 29873; i++ {
+		fmt.Fprintf(out, "%d,", emission[i])
+	}
+	fmt.Fprintln(out, "}")
+	out.Close()
+}