From 65f67f3c57b4363af93ab09f5421f8089e49e704 Mon Sep 17 00:00:00 2001
From: Kevin Chabowski <kevin@kch42.de>
Date: Mon, 12 Aug 2013 14:27:59 +0200
Subject: Added mapper example

---
 mcmap/examples/mapper/main.go | 78 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 mcmap/examples/mapper/main.go

(limited to 'mcmap/examples/mapper/main.go')

diff --git a/mcmap/examples/mapper/main.go b/mcmap/examples/mapper/main.go
new file mode 100644
index 0000000..11cc97d
--- /dev/null
+++ b/mcmap/examples/mapper/main.go
@@ -0,0 +1,78 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"github.com/kch42/gomcmap/mcmap"
+	"image"
+	"image/png"
+	"os"
+)
+
+func main() {
+	path := flag.String("path", "", "Path to region directory")
+	output := flag.String("output", "map.png", "File to write image to")
+	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)
+	}
+
+	xmin, xmax, zmin, zmax := region.MaxDims()
+	w := (xmax - xmin) * 16
+	h := (zmax - zmin) * 16
+	img := image.NewRGBA(image.Rect(0, 0, w, h))
+
+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)
+		}
+
+		for x := 0; x < 16; x++ {
+		scanZ:
+			for z := 0; z < 16; z++ {
+				ax, az := mcmap.ChunkToBlock(cx, cz, x, z)
+				for y := 255; y >= 0; y-- {
+					blk := chunk.Block(x, y, z)
+					c, ok := colors[blk.ID]
+					if ok {
+						img.Set(ax-(xmin*16), az-(zmin*16), c)
+						continue scanZ
+					}
+				}
+				img.Set(ax-(xmin*16), az-(zmin*16), rgb(0x000000))
+			}
+		}
+
+		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)
+		}
+	}
+
+	f, err := os.Create(*output)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Could not write image: %s", err)
+		os.Exit(1)
+	}
+	defer f.Close()
+	if err := png.Encode(f, img); err != nil {
+		fmt.Fprintf(os.Stderr, "Could not write image: %s", err)
+		os.Exit(1)
+	}
+}
-- 
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