Function createLevelFromTmx

common/tmx_level.go:16–204

createLevelFromTmx unmarshalls and unpacks tmx data into a Level

(r io.Reader, tmxURL string, root string)

// createLevelFromTmx unmarshalls and unpacks tmx data into a Level
func createLevelFromTmx(r io.Reader, tmxURL string, root string) (*Level, error) {
	if root == "" {
		return nil, errors.New("createLevelFromTmx should be called with a real root")
	}
	tmx.TMXURL = filepath.Join(root, tmxURL)
	tmxLevel, err := tmx.Parse(r)
	if err != nil {
		return nil, err
	}
	level := &Level{}
	level.Orientation = orth
	level.resourceMap = make(map[uint32]Texture)
	level.pointMap = make(map[mapPoint]*Tile)
	level.framesMap = make(map[uint32][]uint32)

	// get a map of the gids to textures from the tilesets
	for _, ts := range tmxLevel.Tilesets {
		for _, g := range ts.Grid {
			level.Orientation = g.Orientation
		}
		for _, t := range ts.Tiles {
			for _, i := range t.Image {
				if i.Source != "" {
					tex, err := LoadedSprite(path.Join(path.Dir(tmxURL), i.Source))
					if err != nil {
						if strings.HasPrefix(err.Error(), "resource not loaded") {
							err = engo.Files.Load(path.Join(path.Dir(tmxURL), i.Source))
							if err != nil {
								return nil, err
							}
							tex, err = LoadedSprite(path.Join(path.Dir(tmxURL), i.Source))
						} else {
							return nil, err
						}
					}
					level.resourceMap[ts.FirstGID+t.ID] = *tex
				}
			}
			frames := []uint32{}
			for _, f := range t.AnimationFrames {
				frames = append(frames, ts.FirstGID+f.TileID)
			}
			level.framesMap[ts.FirstGID+t.ID] = frames
		}
		for _, i := range ts.Image {
			if i.Source != "" {
				_, err := LoadedSprite(path.Join(path.Dir(tmxURL), i.Source))
				if err != nil {
					if strings.HasPrefix(err.Error(), "resource not loaded") {
						err = engo.Files.Load(path.Join(path.Dir(tmxURL), i.Source))
						if err != nil {
							return nil, err
						}
						_, err = LoadedSprite(path.Join(path.Dir(tmxURL), i.Source))
					} else {
						return nil, err
					}
				}