dorfylegends/backend/model/map.go

214 lines
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package model
import (
"bytes"
"fmt"
"image"
"image/png"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
_ "golang.org/x/image/bmp"
)
func (w *DfWorld) LoadMap() {
w.LoadDimensions()
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fmt.Println("")
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path := ""
files, err := filepath.Glob(strings.ReplaceAll(w.FilePath, "-legends.xml", "-world_map.*"))
if err == nil && len(files) > 0 {
path = files[len(files)-1]
}
files, err = filepath.Glob(strings.ReplaceAll(w.FilePath, "-legends.xml", "-detailed.*"))
if err == nil && len(files) > 0 {
path = files[len(files)-1]
}
if path == "" {
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fmt.Println("no world map found")
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return
}
mapImage, err := os.Open(path)
if err != nil {
fmt.Println(err)
return
}
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fmt.Println("found world map", path)
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img, format, err := image.Decode(mapImage)
if err != nil {
fmt.Println(err)
return
}
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fmt.Println("loaded world map imgage as", format)
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buf := new(bytes.Buffer)
err = png.Encode(buf, img)
if err != nil {
fmt.Println(err)
return
}
w.MapData = buf.Bytes()
w.MapReady = true
}
func (w *DfWorld) LoadDimensions() {
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fmt.Println("")
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files, err := filepath.Glob(filepath.Join(filepath.Dir(w.FilePath), "*-world_gen_param.txt"))
if err != nil {
fmt.Println(err)
return
}
path := ""
for _, f := range files {
prefix := filepath.Base(f)[:len(filepath.Base(f))-len("world_gen_param.txt")]
if strings.HasPrefix(filepath.Base(w.FilePath), prefix) {
path = f
break
}
}
if path == "" {
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fmt.Println("no worldgen params found")
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return
}
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fmt.Println("found worldgen params", path)
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content, err := ioutil.ReadFile(path)
if err != nil {
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fmt.Println(err)
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return
}
r := regexp.MustCompile(`\[DIM:(\d+):(\d+)\]`)
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result := r.FindAllStringSubmatch(string(content), 1)
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if result == nil {
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fmt.Println("no world dimensions found")
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return
}
w.Width, _ = strconv.Atoi(result[0][2])
w.Height, _ = strconv.Atoi(result[0][1])
}
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type Coord struct {
X, Y int
}
func Coords(s string) []Coord {
var coords []Coord
for _, c := range strings.Split(s, "|") {
if c == "" {
continue
}
d := strings.Split(c, ",")
x, _ := strconv.Atoi(d[0])
y, _ := strconv.Atoi(d[1])
coords = append(coords, Coord{X: x, Y: y})
}
return coords
}
func maxCoords(coords []Coord) Coord {
var max Coord
for _, c := range coords {
if c.X > max.X {
max.X = c.X
}
if c.Y > max.Y {
max.Y = c.Y
}
}
return max
}
func (r *Region) Outline() []Coord {
var outline []Coord
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if r.Coords == "" {
return outline
}
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// if (cacheOutline != null)
// return cacheOutline;
/* draw the region in a matrix */
coords := Coords(r.Coords)
max := maxCoords(coords)
var region = make([][]bool, max.X+3)
for i := range region {
region[i] = make([]bool, max.Y+3)
}
for _, c := range coords {
region[c.X+1][c.Y+1] = true
}
var curdir, prevdir rune
curdir = 'n'
if len(coords) == 1 || coords[0].X == coords[1].X-1 {
curdir = 'e'
}
x0 := coords[0].X + 1
y0 := coords[0].Y + 1
x := x0
y := y0
/* follow the outline by keeping the right hand inside */
Loop:
for {
if !(x != x0 || y != y0 || prevdir == 0) {
break Loop
}
prevdir = curdir
switch {
case curdir == 'n' && y > 1:
y -= 1
if region[x-1][y-1] {
curdir = 'w'
} else if !region[x][y-1] {
curdir = 'e'
}
case curdir == 's' && y < max.Y+2:
y += 1
if region[x][y] {
curdir = 'e'
} else if !region[x-1][y] {
curdir = 'w'
}
case curdir == 'w' && x > 1:
x -= 1
if region[x-1][y] {
curdir = 's'
} else if !region[x-1][y-1] {
curdir = 'n'
}
case curdir == 'e' && x < max.X+2:
x += 1
if region[x][y-1] {
curdir = 'n'
} else if !region[x][y] {
curdir = 's'
}
}
if curdir != prevdir {
/* change of direction: record point */
outline = append(outline, Coord{X: x - 1, Y: y - 1})
if len(outline) > 256*10 {
break Loop
}
}
}
return outline
}
func (x *WorldConstruction) Line() []Coord {
return Coords(x.Coords)
}