cleaning up bounds check

internal/app/game_view.go

@@ -51,24 +51,24 @@ func (v *gameView) draw(ui *UI) {
 	offset := point{1, 1}
 
 	// fill in background dots first
-	for x := 0; x < v.room.Width(); x++ {
-		for y := 0; y < v.room.Height(); y++ {
+	for x := 0; x < v.room.Width; x++ {
+		for y := 0; y < v.room.Height; y++ {
 			ui.screen.SetContent(x+offset.x, y+offset.y, '·', nil, tcell.StyleDefault)
 		}
 	}
 
 	// frame it
 	ui.screen.SetContent(offset.x-1, offset.y-1, '┌', nil, tcell.StyleDefault)
-	ui.screen.SetContent(offset.x+v.room.Width(), offset.y-1, '┐', nil, tcell.StyleDefault)
-	ui.screen.SetContent(offset.x-1, offset.y+v.room.Height(), '└', nil, tcell.StyleDefault)
-	ui.screen.SetContent(offset.x+v.room.Width(), offset.y+v.room.Height(), '┘', nil, tcell.StyleDefault)
-	for x := 0; x < v.room.Width(); x++ {
+	ui.screen.SetContent(offset.x+v.room.Width, offset.y-1, '┐', nil, tcell.StyleDefault)
+	ui.screen.SetContent(offset.x-1, offset.y+v.room.Height, '└', nil, tcell.StyleDefault)
+	ui.screen.SetContent(offset.x+v.room.Width, offset.y+v.room.Height, '┘', nil, tcell.StyleDefault)
+	for x := 0; x < v.room.Width; x++ {
 		ui.screen.SetContent(x+offset.x, offset.y-1, '─', nil, tcell.StyleDefault)
-		ui.screen.SetContent(x+offset.x, offset.y+v.room.Height(), '─', nil, tcell.StyleDefault)
+		ui.screen.SetContent(x+offset.x, offset.y+v.room.Height, '─', nil, tcell.StyleDefault)
 	}
-	for y := 0; y < v.room.Height(); y++ {
+	for y := 0; y < v.room.Height; y++ {
 		ui.screen.SetContent(offset.x-1, y+offset.y, '│', nil, tcell.StyleDefault)
-		ui.screen.SetContent(offset.x+v.room.Width(), y+offset.y, '│', nil, tcell.StyleDefault)
+		ui.screen.SetContent(offset.x+v.room.Width, y+offset.y, '│', nil, tcell.StyleDefault)
 	}
 
 	for _, e := range v.room.Entities {

internal/math/bounds.go

@@ -1,35 +1,24 @@
 package math
 
-import "encoding/json"
-
 type Bounds struct {
-	Min Vec `json:"min"`
-	Max Vec `json:"max"`
+	Origin Vec `json:"origin"`
+	Width  int `json:"width"`
+	Height int `json:"height"`
 }
 
 func CreateBounds(width, height int) Bounds {
 	return Bounds{
-		Min: Vec{0, 0},
-		Max: Vec{width - 1, height - 1},
+		Origin: Vec{0, 0},
+		Width:  width,
+		Height: height,
 	}
 }
 
-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) 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
+	return v.X >= b.Origin.X &&
+		v.X < b.Origin.X+b.Width &&
+		v.Y >= b.Origin.Y &&
+		v.Y < b.Height
 }

internal/server/sim/player.go

@@ -24,7 +24,7 @@ func (m *Move) exec(r *room, p *player, seq int) result {
 	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 !p.room.bounds.Contains(target) {
+	if !p.room.Contains(target) {
 		return result{reply: wire.Errorf("target cell (%d, %d) is out of bounds", target.X, target.Y)}
 	}
 
@@ -97,7 +97,7 @@ func (s *SpawnPlayer) exec(r *room, p *player, seq int) result {
 	}
 	welcome.Rooms[r.name] = wire.Room{
 		Name:     r.name,
-		Bounds:   r.bounds,
+		Bounds:   r.Bounds,
 		Entities: ents,
 	}
 	for _, p := range r.players {

internal/server/sim/room.go

@@ -10,9 +10,8 @@ import (
 
 type room struct {
 	*blammo.Log
-	name    string
-	origin  point
-	bounds  math.Bounds
+	name string
+	math.Bounds
 	tiles   []tile
 	players map[string]*player
 }
@@ -68,9 +67,9 @@ func (r *room) removePlayer(name string) bool {
 }
 
 func (r *room) getTile(pos math.Vec) *tile {
-	if !r.bounds.Contains(pos) {
+	if !r.Contains(pos) {
 		return nil
 	}
-	n := pos.X*r.bounds.Width() + pos.Y
+	n := pos.X*r.Width + pos.Y
 	return &r.tiles[n]
 }

internal/server/sim/world.go

@@ -24,8 +24,7 @@ func NewWorld(log *blammo.Log) *World {
 	foyer := room{
 		Log:     log.Child("foyer"),
 		name:    "foyer",
-		origin:  point{0, 0},
-		bounds:  bounds,
+		Bounds:  math.CreateBounds(10, 10),
 		tiles:   make([]tile, bounds.Area()),
 		players: make(map[string]*player),
 	}
@@ -35,6 +34,7 @@ func NewWorld(log *blammo.Log) *World {
 		Glyph:    'd',
 		behavior: doNothing{},
 	}
+	log.Info("created foyer with bounds: %#v having width: %d height: %d area: %d", foyer.Bounds, foyer.Width, foyer.Height, foyer.Area())
 	return &World{
 		Log:     log,
 		rooms:   []room{foyer},

internal/wire/room.go

@@ -6,10 +6,7 @@ import (
 
 // 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"`
+	Name        string `json:"name"`
+	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() }