Add meshscale

cmd/meshscale/main.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	. "github.com/fogleman/fauxgl"
+	kingpin "gopkg.in/alecthomas/kingpin.v2"
+)
+
+var (
+	scale  = kingpin.Flag("scale", "Scale factor.").Short('s').Required().Float64()
+	prefix = kingpin.Flag("prefix", "Prefix to apply to each output filename.").Default("").String()
+	suffix = kingpin.Flag("suffix", "Suffix to apply to each output filename.").Default("").String()
+	output = kingpin.Flag("output", "Output directory.").Short('o').Default("").String()
+	files  = kingpin.Arg("files", "Models to process.").Required().ExistingFiles()
+)
+
+func main() {
+	kingpin.Parse()
+
+	if *output != "" {
+		if err := os.MkdirAll(*output, 0755); err != nil {
+			log.Fatal(err)
+		}
+	}
+
+	for _, filename := range *files {
+		fmt.Println(filename)
+
+		mesh, err := LoadMesh(filename)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		mesh.Transform(Scale(V(*scale, *scale, *scale)))
+
+		dir, file := filepath.Split(filename)
+		name := strings.TrimSuffix(file, filepath.Ext(file))
+		name = *prefix + name + *suffix + ".stl"
+
+		if *output != "" {
+			dir = *output
+		}
+
+		outputFilename := filepath.Join(dir, name)
+		fmt.Printf(" => %s\n", outputFilename)
+		if err := mesh.SaveSTL(outputFilename); err != nil {
+			log.Fatal(err)
+		}
+	}
+}