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main.go
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main.go
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package main
import (
"log"
"os"
"strconv"
"strings"
"github.com/Delta-de-Dirac/diamondSquare-go/pkg/heightmap"
)
func main() {
if len(os.Args) != 4{
log.Printf("Wrong number of arguments... expected 3 arguments, but received %d", len(os.Args)-1)
log.Fatal("usage: diamondSquare-cli <size> <h> <output filename>")
}
size, err := strconv.Atoi(os.Args[1])
if err != nil{
log.Fatal(err)
}
h, err := strconv.ParseFloat(os.Args[2],64)
if err != nil{
log.Fatal(err)
}
fileName := os.Args[3]
if len(fileName) < 4 {
log.Fatal("argument <output filename> must end in .png .jpg .jpeg or .gif")
}
outputFormat := ""
if strings.HasSuffix(fileName,".png"){
outputFormat = "png"
}
if strings.HasSuffix(fileName,".gif"){
outputFormat = "gif"
}
if strings.HasSuffix(fileName,".jpeg"){
outputFormat = "jpeg"
}
if strings.HasSuffix(fileName,".jpg"){
outputFormat = "jpeg"
}
if outputFormat == ""{
log.Fatal("argument <output filename> must end in .png .jpg .jpeg or .gif")
}
hmap, err := heightmap.NewHeightmap(size)
if err != nil{
log.Fatal(err)
}
err = hmap.GenMapP(h)
if err != nil{
log.Fatal(err)
}
err = hmap.SaveMap(fileName, outputFormat)
if err != nil{
log.Fatal(err)
}
}