basic mapgen

engine/gamemap/mapgens/default.go

@@ -0,0 +1,108 @@
+package mapgens
+
+import (
+	"lab.zaar.be/thefish/alchemyst-go/engine/gamemap"
+	"lab.zaar.be/thefish/alchemyst-go/engine/types"
+	"lab.zaar.be/thefish/alchemyst-go/util"
+)
+//fixme move to config
+var maxrooms = 100
+var minRoomSize = 3
+var maxRoomSize = 11
+
+func DefaultGen(l *gamemap.Level) *gamemap.Level {
+
+	rng := util.NewRNG()
+
+	//fill with walls
+	for i := 0; i < l.W; i ++ {
+		for j := 0; j < l.H; j++ {
+			l.Tiles[i][j] = gamemap.NewWall()
+		}
+	}
+
+	rooms := make([]*gamemap.Room, maxrooms)
+
+	for i := 0; i < l.MaxRooms; i++ {
+		newRoom := &gamemap.Room{
+			Rect: types.NewRect(
+				rng.Range(l.X, l.W),
+				rng.Range(l.Y, l.H),
+				rng.Range(minRoomSize, maxRoomSize),
+				rng.Range(minRoomSize, maxRoomSize),
+			)}
+		newRoom.Center.X = newRoom.X + newRoom.W / 2
+		newRoom.Center.Y = newRoom.Y + newRoom.H / 2
+
+		failed := false
+		for _, otherRoom := range rooms {
+			if otherRoom.Intersects(newRoom.Rect) {
+				failed = true
+				break
+			}
+		}
+		if !failed {
+			rooms = append(rooms, newRoom)
+		}
+	}
+
+	fillage := types.RectFill{
+		Top: func() *gamemap.Tile {return gamemap.NewWall()},
+		Bottom: func() *gamemap.Tile {return gamemap.NewWall()},
+		Left: func() *gamemap.Tile {return gamemap.NewWall()},
+		Right: func() *gamemap.Tile {return gamemap.NewWall()},
+		BottomLeft: func() *gamemap.Tile {return gamemap.NewWall()},
+		BottomRight: func() *gamemap.Tile {return gamemap.NewWall()},
+		TopLeft: func() *gamemap.Tile {return gamemap.NewWall()},
+		TopRight: func() *gamemap.Tile {return gamemap.NewWall()},
+		Body: func() *gamemap.Tile {return gamemap.NewFloor()},
+	}
+
+	for idx, room := range rooms {
+		room.Blit(fillage, l)
+		if idx > 0 {
+			connectRooms(l, room, rooms[idx-1], fillage, rng.Range(0,1))
+		}
+	}
+
+	return l
+}
+
+func connectRooms (l *gamemap.Level, room, otherRoom *gamemap.Room, fillage types.RectFill, toss int) {
+	if toss == 0 {
+		digHTunnel(l, room.Center.X,otherRoom.Center.X,room.Center.Y, fillage)
+		digVTunnel(l, room.Center.Y,otherRoom.Center.Y,otherRoom.Center.X, fillage)
+	} else {
+		digVTunnel(l, room.Center.Y, otherRoom.Center.Y, room.Center.Y, fillage)
+		digHTunnel(l, room.Center.X, otherRoom.Center.X, otherRoom.Center.Y, fillage)
+	}
+}
+
+func digHTunnel(l *gamemap.Level, x1,x2,y int, fillage types.RectFill) {
+	var start, finish int
+	if x1 > x2 {
+		start = x1
+		finish = x2
+	} else {
+		start = x2
+		finish = x1
+	}
+	for i := start; i <= finish; i++ {
+		l.Tiles[i][y] = fillage.Body.(func() *gamemap.Tile)()
+	}
+}
+
+
+func digVTunnel(l *gamemap.Level, y1,y2,x int, fillage types.RectFill) {
+	var start, finish int
+	if y1 > y2 {
+		start = y1
+		finish = y2
+	} else {
+		start = y2
+		finish = y1
+	}
+	for i := start; i <= finish; i++ {
+		l.Tiles[x][i] = fillage.Body.(func() *gamemap.Tile)()
+	}
+}