i think i'm making it worse now

internal/app/game_view.go

@@ -2,6 +2,7 @@ package app
 
 import (
 	"github.com/gdamore/tcell/v2"
+	"github.com/jordanorelli/astro-domu/internal/math"
 	"github.com/jordanorelli/astro-domu/internal/server/sim"
 	"github.com/jordanorelli/astro-domu/internal/wire"
 	"github.com/jordanorelli/blammo"
@@ -9,9 +10,12 @@ import (
 
 type gameView struct {
 	*blammo.Log
+	roomName    string
 	width       int
 	height      int
-	// entities map[int]wire.Entity
+	me          wire.Entity
+	allRooms    map[string]wire.Room
+	allEntities map[int]wire.Entity
 }
 
 func (v *gameView) handleEvent(ui *UI, e tcell.Event) bool {
@@ -38,18 +42,30 @@ func (v *gameView) handleEvent(ui *UI, e tcell.Event) bool {
 
 func (v *gameView) notify(wv wire.Value) {
 	v.Error("ignoring notifications at the moment: %v", wv)
-	// if e, ok := v.(*wire.Entity); ok {
+	switch z := wv.(type) {
-	// 	m.entities[e.ID] = *e
+	case *wire.UpdateEntity:
-	// }
+		if z.Room == v.roomName {
+			v.Info("we want to read this one: %v", z)
+		}
+	}
 }
 
 func (v *gameView) move(ui *UI, dx, dy int) {
-	_, err := ui.client.Send(sim.Move{dx, dy})
+	reply, err := ui.client.Send(sim.Move{dx, dy})
 	if err != nil {
 		return
 	}
-	// e := reply.Body.(*wire.Entity)
+
-	// v.entities[e.ID] = *e
+	e := reply.Body.(*wire.UpdateEntity)
+	// ughhhhhh
+	v.me = wire.Entity{
+		ID:       e.ID,
+		Position: e.Position,
+		Glyph:    e.Glyph,
+	}
+	v.allEntities[e.ID] = v.me
+	// jfc this sucks
+	v.allRooms[v.roomName].Entities[e.ID] = v.me
 }
 
 func (v *gameView) draw(ui *UI) {
@@ -76,7 +92,8 @@ func (v *gameView) draw(ui *UI) {
 		ui.screen.SetContent(offset.x+v.width, y+offset.y, '│', nil, tcell.StyleDefault)
 	}
 
-	// for _, e := range v.entities {
+	for _, e := range v.allRooms[v.roomName].Entities {
-	// 	ui.screen.SetContent(e.Position[0]+offset.x, e.Position[1]+offset.y, e.Glyph, nil, tcell.StyleDefault)
+		pos := e.Position.Add(math.Vec{1, 1})
-	// }
+		ui.screen.SetContent(pos.X, pos.Y, e.Glyph, nil, tcell.StyleDefault)
+	}
 }

internal/app/ui.go

@@ -36,18 +36,25 @@ func (ui *UI) Run() {
 		ui.Error("unexpected initial message of type %t", res.Body)
 		return
 	}
-	ui.Info("spawned into room %s", welcome.Room)
+	ui.Info("welcome: %v", welcome)
-
+	meta := welcome.Players[ui.PlayerName]
-	// entities := make(map[int]sim.Entity, len(welcome.Contents))
+	room := welcome.Rooms[meta.Room]
-	// for _, e := range welcome.Contents {
+	allEntities := make(map[int]wire.Entity)
-	// 	entities[e.ID] = e
+	for _, r := range welcome.Rooms {
-	// }
+		for id, e := range r.Entities {
+			allEntities[id] = e
+		}
+	}
 	ui.view = &gameView{
 		Log:         ui.Child("game-view"),
-		width:  welcome.Room.Width,
+		roomName:    room.Name,
-		height: welcome.Room.Height,
+		width:       room.Width(),
-		// entities: entities,
+		height:      room.Height(),
+		me:          room.Entities[meta.Avatar],
+		allRooms:    welcome.Rooms,
+		allEntities: allEntities,
 	}
+
 	ui.Info("running ui")
 	if ui.handleUserInput() {
 		ui.Info("user requested close")

internal/math/abs.go

@@ -0,0 +1,8 @@
+package math
+
+func Abs(n int) int {
+	if n >= 0 {
+		return n
+	}
+	return -n
+}

internal/math/bounds.go

@@ -0,0 +1,35 @@
+package math
+
+import "encoding/json"
+
+type Bounds struct {
+	Min Vec `json:"min"`
+	Max Vec `json:"max"`
+}
+
+func CreateBounds(width, height int) Bounds {
+	return Bounds{
+		Min: Vec{0, 0},
+		Max: Vec{width - 1, height - 1},
+	}
+}
+
+func (b Bounds) Width() int  { return Abs(b.Max.X - b.Min.X) }
+func (b Bounds) Height() int { return Abs(b.Max.Y - b.Min.Y) }
+func (b Bounds) Area() int   { return b.Width() * b.Height() }
+
+func (b Bounds) Contains(v Vec) bool {
+	return v.X >= b.Min.X && v.X <= b.Max.X && v.Y >= b.Min.Y && v.Y <= b.Max.Y
+}
+
+func (b Bounds) MarshalJSON() ([]byte, error) { return json.Marshal([2]Vec{b.Min, b.Max}) }
+
+func (b *Bounds) UnmarshalJSON(buf []byte) error {
+	var raw [2]Vec
+	if err := json.Unmarshal(buf, &raw); err != nil {
+		return err
+	}
+	b.Min = raw[0]
+	b.Max = raw[1]
+	return nil
+}

internal/server/sim/player.go

@@ -13,7 +13,7 @@ type player struct {
 	name    string
 	outbox  chan wire.Response
 	pending []Request
-	entity  *entity
+	avatar  *entity
 }
 
 type Move math.Vec
@@ -21,24 +21,25 @@ type Move math.Vec
 func (Move) NetTag() string { return "move" }
 
 func (m *Move) exec(r *room, p *player, seq int) result {
-	pos := p.entity.Position
+	pos := p.avatar.Position
 	target := pos.Add(math.Vec(*m))
 	p.Info("running move for player %s from %v to %v", p.name, *m, target)
-	if target.X >= r.width || target.X < 0 {
+	if !p.room.bounds.Contains(target) {
 		return result{reply: wire.Errorf("target cell (%d, %d) is out of bounds", target.X, target.Y)}
 	}
-	if target.Y >= r.height || target.Y < 0 {
+
-		return result{reply: wire.Errorf("target cell (%d, %d) is out of bounds", target.X, target.Y)}
+	currentTile := r.getTile(pos)
-	}
+	nextTile := r.getTile(target)
-	n := target.X*r.width + target.Y
+	if nextTile.here != nil {
-	if r.tiles[n].here != nil {
 		return result{reply: wire.Errorf("target cell (%d, %d) is occupied", target.X, target.Y)}
 	}
-	r.tiles[p.entity.Position.X*r.width+p.entity.Position.Y].here = nil
+
-	p.entity.Position = target
+	currentTile.here, nextTile.here = nil, p.avatar
-	r.tiles[n].here = p.entity
+	p.avatar.Position = target
-	e := wire.Entity{
+	e := wire.UpdateEntity{
-		Position: p.entity.Position,
+		Room:     r.name,
+		ID:       p.avatar.ID,
+		Position: p.avatar.Position,
 		Glyph:    '@',
 	}
 	return result{reply: e, announce: e}
@@ -63,30 +64,51 @@ func (s *SpawnPlayer) exec(r *room, _ *player, seq int) result {
 		}
 
 		lastEntityID++
+		avatar := &entity{
+			ID:       lastEntityID,
+			Position: math.Vec{0, 0},
+			Glyph:    '@',
+			behavior: doNothing{},
+		}
 		p := &player{
 			Log:     r.Log.Child("players").Child(s.Name),
 			room:    r,
 			name:    s.Name,
 			outbox:  s.Outbox,
 			pending: make([]Request, 0, 32),
-			entity: &entity{
+			avatar:  avatar,
-				ID:       lastEntityID,
-				Position: math.Vec{0, 0},
-				Glyph:    '@',
-				behavior: doNothing{},
-			},
 		}
 		p.pending = append(p.pending, Request{Seq: seq, From: s.Name, Wants: s})
 		r.players[s.Name] = p
-		r.tiles[0].here = p.entity
+		r.tiles[0].here = p.avatar
 		s.queued = true
 		return result{}
 	}
 
-	var welcome wire.Welcome
+	welcome := wire.Welcome{
-	welcome.Room.Width = r.width
+		Rooms:   make(map[string]wire.Room),
-	welcome.Room.Height = r.height
+		Players: make(map[string]wire.Player),
-	welcome.Room.Origin = math.Vec{0, 0}
+	}
+	ents := make(map[int]wire.Entity)
+	for id, e := range r.allEntities() {
+		ents[id] = wire.Entity{
+			ID:       id,
+			Position: e.Position,
+			Glyph:    e.Glyph,
+		}
+	}
+	welcome.Rooms[r.name] = wire.Room{
+		Name:     r.name,
+		Bounds:   r.bounds,
+		Entities: ents,
+	}
+	for _, p := range r.players {
+		welcome.Players[p.name] = wire.Player{
+			Name:   p.name,
+			Avatar: p.avatar.ID,
+			Room:   r.name,
+		}
+	}
 	return result{reply: welcome}
 }
 
@@ -102,5 +124,4 @@ func (PlayerSpawned) NetTag() string { return "player/spawned" }
 
 func init() {
 	wire.Register(func() wire.Value { return new(Move) })
-	// wire.Register(func() wire.Value { return new(pawn) })
 }

internal/server/sim/room.go

@@ -3,6 +3,7 @@ package sim
 import (
 	"time"
 
+	"github.com/jordanorelli/astro-domu/internal/math"
 	"github.com/jordanorelli/astro-domu/internal/wire"
 	"github.com/jordanorelli/blammo"
 )
@@ -11,8 +12,7 @@ type room struct {
 	*blammo.Log
 	name    string
 	origin  point
-	width   int
+	bounds  math.Bounds
-	height  int
 	tiles   []tile
 	players map[string]*player
 }
@@ -39,11 +39,12 @@ func (r *room) update(dt time.Duration) {
 	}
 }
 
-func (r *room) allEntities() []entity {
+func (r *room) allEntities() map[int]*entity {
-	all := make([]entity, 0, 4)
+	all := make(map[int]*entity, 4)
 	for _, t := range r.tiles {
 		if t.here != nil {
-			all = append(all, *t.here)
+			e := t.here
+			all[e.ID] = e
 		}
 	}
 	return all
@@ -60,3 +61,11 @@ func (r *room) removePlayer(name string) bool {
 	}
 	return false
 }
+
+func (r *room) getTile(pos math.Vec) *tile {
+	if !r.bounds.Contains(pos) {
+		return nil
+	}
+	n := pos.X*r.bounds.Width() + pos.Y
+	return &r.tiles[n]
+}

internal/server/sim/world.go

@@ -20,13 +20,13 @@ type World struct {
 }
 
 func NewWorld(log *blammo.Log) *World {
+	bounds := math.CreateBounds(10, 10)
 	foyer := room{
 		Log:     log.Child("foyer"),
 		name:    "foyer",
 		origin:  point{0, 0},
-		width:   10,
+		bounds:  bounds,
-		height:  10,
+		tiles:   make([]tile, bounds.Area()),
-		tiles:   make([]tile, 100),
 		players: make(map[string]*player),
 	}
 	foyer.tiles[55].here = &entity{

internal/wire/entity.go

@@ -5,12 +5,23 @@ import (
 )
 
 type Entity struct {
+	ID       int      `json:"id"`
 	Position math.Vec `json:"position"`
 	Glyph    rune     `json:"glyph"`
 }
 
 func (Entity) NetTag() string { return "entity" }
 
+type UpdateEntity struct {
+	Room     string   `json:"room"`
+	ID       int      `json:"id"`
+	Position math.Vec `json:"position"`
+	Glyph    rune     `json:"glyph"`
+}
+
+func (UpdateEntity) NetTag() string { return "entity/updated" }
+
 func init() {
 	Register(func() Value { return new(Entity) })
+	Register(func() Value { return new(UpdateEntity) })
 }

internal/wire/player.go

@@ -0,0 +1,7 @@
+package wire
+
+type Player struct {
+	Name   string `json:"name"`
+	Room   string `json:"room"`
+	Avatar int    `json:"avatar"`
+}

internal/wire/room.go

@@ -0,0 +1,15 @@
+package wire
+
+import (
+	"github.com/jordanorelli/astro-domu/internal/math"
+)
+
+// Room represents a 2-dimensional coordinate space.
+type Room struct {
+	Name     string         `json:"name"`
+	Bounds   math.Bounds    `json:"bounds"`
+	Entities map[int]Entity `json:"entities"`
+}
+
+func (r Room) Width() int  { return r.Bounds.Width() }
+func (r Room) Height() int { return r.Bounds.Height() }

internal/wire/welcome.go

@@ -1,16 +1,8 @@
 package wire
 
-import (
-	"github.com/jordanorelli/astro-domu/internal/math"
-)
-
 type Welcome struct {
-	Room struct {
+	Rooms   map[string]Room   `json:"rooms"`
-		Origin math.Vec `json:"origin"`
+	Players map[string]Player `json:"players"`
-		Width  int      `json:"width"`
-		Height int      `json:"height"`
-	} `json:"room"`
-	Entities map[int]Entity `json:"entities"`
 }
 
 func (Welcome) NetTag() string { return "welcome" }