Added NewWorld, and test world3

world3 introduces a generated world via NewWorld, adds some tiles and
assigns a single spot on the map.

main.go

@@ -61,13 +61,25 @@ func main() {
 		return
 	}
 	fmt.Println("Loaded", w.Name, "a", w.Width, "x", w.Height)
-	err = w.Save(path.Join("test_data", "world2"))
+	/*err = w.Save(path.Join("test_data", "world2"))
 	if err != nil {
 		fmt.Println("Err:", err)
 		return
-	}
-	c := &Camera{Size: NewVec2(10)}
-	fmt.Println(c.debugView(NewVec2(5), w))
-	c.Size.Assign(20)
+	}*/
+	c := &Camera{Size: NewVec2(20)}
 	fmt.Println(c.debugView(NewVec2(10), w))
+	w2, err := LoadWorld(path.Join("test_data", "world3"))
+	if err != nil {
+		w2 = NewWorld("Test World 3", NewVec2(20))
+		w2.AddTile(".", "BRI GRE ON BLA")
+		w2.AddTile("^", "BRI WHI ON BLA")
+		w2.AddTile("^", "WHI ON BLA")
+		w2.Set(1, 1, 1)
+		err = w2.Save(path.Join("test_data", "world3"))
+		if err != nil {
+			fmt.Println("Err:", err)
+			return
+		}
+	}
+	fmt.Println(c.debugView(NewVec2(10), w2))
 }

world.go

@@ -18,6 +18,21 @@ type World struct {
 	Map       []uint64   `json:"-"`
 }
 
+func NewWorld(name string, size *Vec2) *World {
+	return &World{
+		Name:      name,
+		Width:     uint64(size.X),
+		Height:    uint64(size.Y),
+		TileIndex: &TileIndex{},
+		Map:       make([]uint64, size.X*size.Y),
+	}
+}
+
+func (w *World) AddTile(symbol string, color string) uint64 {
+	w.TileIndex.Tiles = append(w.TileIndex.Tiles, &Tile{Symbol: symbol, Color: color})
+	return uint64(len(w.TileIndex.Tiles))
+}
+
 func LoadWorld(worlddir string) (*World, error) {
 	var (
 		w   *World = &World{}
@@ -134,3 +149,13 @@ func (w *World) Get(x, y uint64) uint64 {
 	}
 	return w.Map[idx]
 }
+
+func (w *World) Set(x, y, t uint64) bool {
+	idx := (y * w.Width) + x
+	max := w.Width * w.Height
+	if idx >= max {
+		return false
+	}
+	w.Map[idx] = t
+	return true
+}