world ticking

internal/server/server.go

@@ -12,6 +12,7 @@ import (
 
 	"github.com/gorilla/websocket"
 	"github.com/jordanorelli/astro-domu/internal/errors"
+	"github.com/jordanorelli/astro-domu/internal/sim"
 	"github.com/jordanorelli/astro-domu/internal/wire"
 	"github.com/jordanorelli/blammo"
 )
@@ -21,6 +22,7 @@ type Server struct {
 	Host  string
 	Port  int
 	http  *http.Server
+	world *sim.World
 
 	sync.Mutex
 	lastSessionID  int
@@ -48,6 +50,9 @@ func (s *Server) Start() error {
 		s.Log = blammo.NewLog("astro", options...).Child("server")
 	}
 
+	s.world = sim.NewWorld(s.Log.Child("world"))
+	go s.world.Run(3)
+
 	addr := fmt.Sprintf("%s:%d", s.Host, s.Port)
 	lis, err := net.Listen("tcp", addr)
 	if err != nil {

internal/sim/entity.go

@@ -1,5 +1,7 @@
 package sim
 
+import "time"
+
 // entity is any entity that can be simulated.
 type entity interface {
 	// update is the standard tick function

internal/sim/floor.go

@@ -0,0 +1,8 @@
+package sim
+
+type floor int
+
+const (
+	fl_nothing floor = iota
+	fl_rock
+)

internal/sim/player.go

@@ -0,0 +1,5 @@
+package sim
+
+// player represents a player character in the simulation
+type player struct {
+}

internal/sim/point.go

@@ -0,0 +1,3 @@
+package sim
+
+type point struct { x, y int }

internal/sim/room.go

@@ -1,4 +1,7 @@
 package sim
 
-type Room struct {
+type room struct {
+	origin point
+	width  int
+	height int
 }

internal/sim/tile.go

@@ -0,0 +1,6 @@
+package sim
+
+type tile struct {
+	floor    floor
+	contents []entity
+}

internal/sim/world.go

@@ -1,4 +1,44 @@
 package sim
 
+import (
+	"time"
+
+	"github.com/jordanorelli/blammo"
+)
+
+// World is the entire simulated world. A world consists of many rooms.
 type World struct {
+	*blammo.Log
+	rooms []room
+}
+
+func NewWorld(log *blammo.Log) *World {
+	return &World{
+		Log: log,
+		rooms: []room{
+			room{
+				origin: point{0, 0},
+				width:  10,
+				height: 10,
+			},
+		},
+	}
+}
+
+func (w *World) Run(hz int) {
+	period := time.Second / time.Duration(hz)
+	w.Info("starting world with a tick rate of %dhz, frame duration of %v", hz, period)
+	ticker := time.NewTicker(period)
+	lastTick := time.Now()
+	for {
+		select {
+		case <-ticker.C:
+			w.tick(time.Since(lastTick))
+			lastTick = time.Now()
+		}
+	}
+}
+
+func (w *World) tick(d time.Duration) {
+	w.Info("tick. elapsed: %v", d)
 }

internal/ui/buffer.go

@@ -0,0 +1,19 @@
+package ui
+
+// buffer is a rect of tiles
+type buffer struct {
+	width  int
+	height int
+	tiles  []tile
+}
+
+func newBuffer(width, height int) *buffer {
+	return &buffer{
+		width:  width,
+		height: height,
+		tiles:  make([]tile, width*height),
+	}
+}
+
+func (b *buffer) set(x, y int, t tile) { b.tiles[y*b.width+x] = t }
+func (b *buffer) get(x, y int) tile    { return b.tiles[y*b.width+x] }

internal/ui/tile.go

@@ -0,0 +1,11 @@
+package ui
+
+import (
+	"github.com/gdamore/tcell/v2"
+)
+
+type tile struct {
+	r     rune
+	combc []rune
+	style tcell.Style
+}