2 files changed, 67 insertions, 0 deletions
diff --git a/mcmap/examples/replace/.gitignore b/mcmap/examples/replace/.gitignore
new file mode 100644
index 0000000..6e8b374
--- /dev/null
+++ b/mcmap/examples/replace/.gitignore
@@ -0,0 +1 @@
+replace
diff --git a/mcmap/examples/replace/main.go b/mcmap/examples/replace/main.go
new file mode 100644
index 0000000..f7bad96
--- /dev/null
+++ b/mcmap/examples/replace/main.go
@@ -0,0 +1,66 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"github.com/kch42/gomcmap/mcmap"
+	"os"
+)
+
+func main() {
+	path := flag.String("path", "", "Path to region directory")
+	flag.Parse()
+
+	if *path == "" {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	region, err := mcmap.OpenRegion(*path, true)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Could not open region: %s\n", err)
+		os.Exit(1)
+	}
+
+chunkLoop:
+	for chunkPos := range region.AllChunks() {
+		cx, cz := chunkPos.X, chunkPos.Z
+		chunk, err := region.Chunk(cx, cz)
+		switch err {
+		case nil:
+		case mcmap.NotAvailable:
+			continue chunkLoop
+		default:
+			fmt.Fprintf(os.Stderr, "Error while getting chunk (%d, %d): %s\n", cx, cz, err)
+			os.Exit(1)
+		}
+
+		modified := false
+		for y := 0; y < 256; y++ {
+			for x := 0; x < 16; x++ {
+				for z := 0; z < 16; z++ {
+					blk := chunk.Block(x, y, z)
+					if blk.ID == mcmap.BlkBlockOfIron {
+						blk.ID = mcmap.BlkBlockOfDiamond
+						modified = true
+					}
+				}
+			}
+		}
+
+		if modified {
+			fmt.Printf("Modified chunk %d, %d.\n", cx, cz)
+			chunk.MarkModified()
+		}
+
+		if err := region.UnloadChunk(cx, cz); err != nil {
+			fmt.Fprintf(os.Stderr, "Error while unloading chunk %d, %d: %s\n", cx, cz, err)
+			os.Exit(1)
+		}
+	}
+
+	if err := region.Save(); err != nil {
+		fmt.Fprintf(os.Stderr, "Error while saving: %s\n", err)
+		os.Exit(1)
+	}
+}