DELETE: print out user events

now you spell it as such:

gobot -addr wss://hackerbots.us
gobot -addr ws://localhost:8666

client.go

@@ -5,36 +5,37 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"log"
 
-	"bitbucket.org/hackerbots/server"
-	"code.google.com/p/go.net/websocket"
+	"golang.org/x/net/websocket"
+
+	"hackerbots.us/server"
 )
 
-func connect(server string, port int) (*websocket.Conn, error) {
+func connect(addr string) (*websocket.Conn, error) {
 	origin := "http://localhost/"
-	url := fmt.Sprintf("ws://%s:%d/ws/", server, port)
+	url := fmt.Sprintf("%s/ws/", addr)
 	return websocket.Dial(url, "", origin)
 }
 
 // Client keeps track of connection to server and has two interesting methods:
-// Negociate and Play. Users of this struct will likely use most everything as
+// Negotiate and Play. Users of this struct will likely use most everything as
 // is while defining their own Player to specify desired game play behavior.
 type Client struct {
 	ForceJSON bool
 	GameId    string
 	Name      string
-	Port      int
 	Server    string
-	StatsReq  server.StatsRequest
-	Verbose   bool
-	Player    Player
 	Game      server.GameParam
 
-	boardstate server.Boardstate
+	// max dimensions of field
+	Width, Height float64
+
+	boardstate *server.Boardstate
 	enc        encoder
 	dec        decoder
 	ws         *websocket.Conn
+
+	Player
 }
 
 type encoder interface {
@@ -45,12 +46,9 @@ type decoder interface {
 	Decode(v interface{}) error
 }
 
-// Negociate runs through the hackerbots negociation protocol.
-func (c *Client) Negociate() (err error) {
-	if c.Verbose {
-		log.Printf("%s: trying to connect to game '%s'", c.Name, c.GameId)
-	}
-	c.ws, err = connect(c.Server, c.Port)
+// Negotiate runs through the hackerbots negociation protocol.
+func (c *Client) Negotiate(clientType string, player Player) (err error) {
+	c.ws, err = connect(c.Server)
 	if err != nil {
 		return errors.New(fmt.Sprintf("connection failure: %s", err))
 	}
@@ -72,9 +70,6 @@ func (c *Client) Negociate() (err error) {
 	if err != nil || idreq.Type == "failure" {
 		return errors.New(fmt.Sprintf("failure: %+v", idreq))
 	}
-	if c.Verbose {
-		log.Printf("%s: idreq: %+v", c.Name, idreq)
-	}
 
 	err = websocket.JSON.Send(c.ws, struct {
 		Type      string `json:"type"`
@@ -83,7 +78,7 @@ func (c *Client) Negociate() (err error) {
 	}{
 		Name:      c.Name,
 		Useragent: "gobot",
-		Type:      "robot",
+		Type:      clientType,
 	})
 	if err != nil {
 		return err
@@ -102,9 +97,6 @@ func (c *Client) Negociate() (err error) {
 	if c.Game.Type != "gameparam" {
 		return errors.New("didn't receive a good gameparam")
 	}
-	if c.Verbose {
-		log.Printf("%s: game parameters: %+v", c.Name, c.Game)
-	}
 
 	if c.Game.Encoding == "json" {
 		c.enc = json.NewEncoder(c.ws)
@@ -114,11 +106,11 @@ func (c *Client) Negociate() (err error) {
 		c.dec = gob.NewDecoder(c.ws)
 	}
 
+	switch clientType {
+	case "robot":
 		conf := server.ClientConfig{
 			ID:    c.GameId,
-		Stats: map[string]server.StatsRequest{
-			c.Name: c.StatsReq,
-		},
+			Stats: player.GetStats(),
 		}
 
 		err = websocket.JSON.Send(c.ws, conf)
@@ -133,9 +125,6 @@ func (c *Client) Negociate() (err error) {
 		if !handshake.Success {
 			return errors.New(handshake.Reason)
 		}
-	if c.Verbose {
-		log.Printf("%s: handshake: %+v", c.Name, handshake)
-	}
 
 		// we don't do anything useful with dstats, but could be interesting to
 		// pass along to the player?
@@ -143,10 +132,22 @@ func (c *Client) Negociate() (err error) {
 			Stats map[string]server.Stats `json:"stats"`
 			Type  string                  `json:"type"`
 		}{}
+
 		err = websocket.JSON.Receive(c.ws, &dstats)
 		if err != nil {
 			return err
 		}
+		ids := make(map[string]string)
+		for name, entry := range dstats.Stats {
+			ids[entry.Id] = name
+		}
+		player.SetIDs(ids)
+
+	case "spectator":
+	}
+
+	c.Width = c.Game.BoardSize.Width
+	c.Height = c.Game.BoardSize.Height
 
 	return nil
 }
@@ -155,18 +156,15 @@ func (c *Client) Negociate() (err error) {
 // server, and passes this along to the embedded Player. Following this it
 // sends the server the Player's instruction.
 func (c *Client) Play() error {
-	log.Printf("%s: starting loop", c.Name)
-
+	bs := &server.Boardstate{}
 	var err error
 	for {
-		err = c.dec.Decode(&c.boardstate)
+		err = c.dec.Decode(bs)
 		if err != nil {
 			return errors.New(fmt.Sprintf("%s: Connection likely lost: %s", c.Name, err))
 		}
-		c.Player.Recv(&c.boardstate)
 
-		instruction := c.Player.Instruction()
-		err = c.enc.Encode(instruction)
+		err = c.enc.Encode(c.Update(bs))
 		if err != nil {
 			return err
 		}

cmd/botspectate/main.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"math/rand"
+	"os"
+	"time"
+
+	"hackerbots.us/client"
+)
+
+var addr = flag.String("addr", "ws://localhost:8666", "server hostname")
+var forceJSON = flag.Bool("json", false, "force json encoding")
+
+func main() {
+	rand.Seed(time.Now().UnixNano())
+	var gameID string
+	flag.Parse()
+	if flag.NArg() < 1 {
+		gameID = "debug"
+	} else {
+		gameID = flag.Arg(0)
+	}
+
+	c := &client.Client{
+		Server:    *addr,
+		Name:      "bspect",
+		GameId:    gameID,
+		ForceJSON: *forceJSON,
+	}
+	var err error
+	err = c.Negotiate("spectator", c.Player)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%s: failed to negotiate: %s\n", c.Name, err)
+		os.Exit(1)
+	}
+
+	ui := client.NewSpectator(c.Width, c.Height)
+	c.Player = ui
+
+	go func() {
+		if ui.User == nil {
+			return
+		}
+		for e := range ui.User {
+			fmt.Printf("%+v\n", e)
+		}
+	}()
+
+	go func() {
+		if err := c.Play(); err != nil {
+			close(ui.Die)
+		}
+	}()
+	if err := ui.Spectate(); err != nil {
+		fmt.Fprintf(os.Stderr, "problem during visualization: %+v\n", err)
+		os.Exit(1)
+	}
+}

cmd/gobot/main.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"math/rand"
+	"os"
+	"time"
+
+	"hackerbots.us/client"
+	"hackerbots.us/server"
+)
+
+var hp = flag.Int("hp", 50, "")
+var speed = flag.Int("speed", 50, "")
+var acceleration = flag.Int("acceleration", 50, "")
+var scannerRadius = flag.Int("srad", 50, "scanner radius")
+var turnSpeed = flag.Int("omega", 50, "turn speed")
+var fireRate = flag.Int("fire-rate", 50, "scanner radius")
+var weaponRadius = flag.Int("wrad", 50, "weapon radius")
+var weaponDamage = flag.Int("wdamage", 50, "weapons umph")
+var weaponSpeed = flag.Int("wspeed", 50, "weapons speed")
+
+// XXX: add TurnSpeed, WeaponDamage, WeaponSpeed
+
+var addr = flag.String("addr", "ws://localhost:8666", "server hostname")
+var botname = flag.String("name", "gobot", "the name that other players will see")
+var forceJSON = flag.Bool("json", false, "force json encoding")
+var botType = flag.String("bot", "simple", "which Bot [fraserbot, simple]")
+var spectate = flag.Bool("spectate", false, "enable terminal visualizer")
+
+func main() {
+	rand.Seed(time.Now().UnixNano())
+	var gameID string
+	flag.Parse()
+	if flag.NArg() < 1 {
+		gameID = "debug"
+	} else {
+		gameID = flag.Arg(0)
+	}
+
+	c := &client.Client{
+		Server:    *addr,
+		Name:      *botname,
+		GameId:    gameID,
+		ForceJSON: *forceJSON,
+	}
+	sr := server.StatsRequest{
+		Hp:            *hp,
+		Speed:         *speed,
+		Acceleration:  *acceleration,
+		ScannerRadius: *scannerRadius,
+		TurnSpeed:     *turnSpeed,
+		FireRate:      *fireRate,
+		WeaponRadius:  *weaponRadius,
+		WeaponDamage:  *weaponDamage,
+		WeaponSpeed:   *weaponSpeed,
+	}
+
+	switch *botType {
+	case "simple":
+		c.Player = client.NewSimplePlayer(800, 600, sr)
+	case "fraserbot":
+		c.Player = client.NewFraserbot("Fraserbot")
+	default:
+		fmt.Fprintf(os.Stderr, "must specify a known bot \n")
+		os.Exit(1)
+	}
+
+	if err := c.Negotiate("robot", c.Player); err != nil {
+		fmt.Fprintf(os.Stderr, "%s: failed to negociate: %s\n", c.Name, err)
+		os.Exit(1)
+	}
+
+	if *spectate {
+		ui := client.NewSpectator(c.Width, c.Height)
+		players := client.MultiPlayer{
+			c.Player,
+			ui,
+		}
+		c.Player = players
+
+		go func() {
+			if err := c.Play(); err != nil {
+				fmt.Fprintf(os.Stderr, "problem during play: %v\n", err)
+				close(ui.Die)
+			}
+		}()
+		if err := ui.Spectate(); err != nil {
+			fmt.Fprintf(os.Stderr, "problem during visualization: %+v\n", err)
+			os.Exit(1)
+		}
+	} else {
+		if err := c.Play(); err != nil {
+			fmt.Fprintf(os.Stderr, "problem during play: %v\n", err)
+			os.Exit(1)
+		}
+	}
+}

fraserbot.go

@@ -0,0 +1,134 @@
+package client
+
+import (
+	"fmt"
+	"log"
+	"math/rand"
+
+	"hackerbots.us/server"
+	"hackerbots.us/vector"
+)
+
+// Fraserbot is a bad ass motherfucker, that will fuck SHIT UUUUUP
+type Fraserbot struct {
+	knownObstacles map[string]server.Obstacle
+	nearestEnemy   *server.OtherRobot
+	fireat         *vector.Point2d
+	moveto         *vector.Point2d
+	name           string
+	botIDs         map[string]string
+}
+
+// NewFraserbot simply returns a populated, usable *Fraserbot
+func NewFraserbot(name string) *Fraserbot {
+	return &Fraserbot{
+		knownObstacles: make(map[string]server.Obstacle),
+		name:           name,
+	}
+}
+
+// GetStats returns a map with an entry for each robot the player will control
+// containing the desired stats for that robot
+func (p *Fraserbot) GetStats() map[string]server.StatsRequest {
+	s := make(map[string]server.StatsRequest)
+
+	s[fmt.Sprintf("%v_MAIN", p.name)] = server.StatsRequest{
+		Hp:            100,
+		Speed:         10,
+		Acceleration:  10,
+		ScannerRadius: 10,
+		TurnSpeed:     10,
+		FireRate:      30,
+		WeaponRadius:  20,
+		WeaponDamage:  30,
+		WeaponSpeed:   30,
+	}
+
+	s[fmt.Sprintf("%v_Jr", p.name)] = server.StatsRequest{
+		Hp:            10,
+		Speed:         100,
+		Acceleration:  10,
+		ScannerRadius: 60,
+		TurnSpeed:     48,
+		FireRate:      1,
+		WeaponRadius:  10,
+		WeaponDamage:  10,
+		WeaponSpeed:   1,
+	}
+
+	return s
+}
+
+// SetIDs provides the mapping of names to ID's for each bot
+func (p *Fraserbot) SetIDs(ids map[string]string) {
+	p.botIDs = ids
+	log.Println(ids)
+}
+
+// Update is our implementation of recieving and processing a server.Boardstate
+// from the server
+func (p *Fraserbot) Update(bs *server.Boardstate) map[string]server.Instruction {
+	instructions := make(map[string]server.Instruction)
+	for _, bot := range bs.MyRobots {
+		me := bot
+
+		// We're just starting out
+		if p.moveto == nil {
+			p.moveto = &me.Position
+		}
+
+		speed := float64(200)
+		// If we're close to where we want to go then pick a new
+		// place to go, we done good
+		if me.Position.Sub(*p.moveto).Mag() < 30 {
+			p.moveto = p.randomDirection(me.Position, 400)
+		}
+
+		if me.ProbeResult != nil && me.ProbeResult.Type == "obstacle" {
+			speed = -50
+			p.moveto = p.randomDirection(me.Position, 600)
+		}
+
+		if len(me.Scanners) > 0 {
+			// Find the bots that are not mine
+
+			var index int
+			found := false
+			for i, entry := range me.Scanners {
+				_, ok := p.botIDs[entry.Id]
+				if !ok {
+					index = i
+					found = true
+					break
+				}
+			}
+
+			if found {
+				// log.Println(me.Scanners[0])
+				for _, bot := range bs.OtherRobots {
+					if bot.Id == me.Scanners[index].Id {
+						p.fireat = &bot.Position
+						log.Printf("%v Found Enemy: %v\n", me.Name, bot.Name)
+					}
+				}
+			}
+		}
+
+		instructions[bot.Id] = server.Instruction{
+			MoveTo:      p.moveto,
+			TargetSpeed: &speed,
+			FireAt:      p.fireat,
+			Probe:       p.moveto,
+		}
+	}
+	return instructions
+}
+
+// randomDirection is a spot within 200 of the current position
+func (p *Fraserbot) randomDirection(pos vector.Point2d, dist float64) *vector.Point2d {
+	pt := vector.Vector2d{
+		X: (rand.Float64() * dist) - (dist / 2) + pos.X,
+		Y: (rand.Float64() * dist) - (dist / 2) + pos.Y,
+	}.ToPoint()
+	return &pt
+}

gobot/main.go

@@ -1,76 +0,0 @@
-package main
-
-import (
-	"flag"
-	"log"
-	"math/rand"
-	"time"
-
-	"bitbucket.org/hackerbots/client"
-	"bitbucket.org/hackerbots/server"
-)
-
-var hp = flag.Int("hp", 50, "")
-var speed = flag.Int("speed", 50, "")
-var acceleration = flag.Int("acceleration", 50, "")
-var scannerRadius = flag.Int("srad", 50, "scanner radius")
-var turnSpeed = flag.Int("omega", 50, "turn speed")
-var fireRate = flag.Int("fire-rate", 50, "scanner radius")
-var weaponRadius = flag.Int("wrad", 50, "weapon radius")
-var weaponDamage = flag.Int("wdamage", 50, "weapons umph")
-var weaponSpeed = flag.Int("wspeed", 50, "weapons speed")
-
-// XXX: add TurnSpeed, WeaponDamage, WeaponSpeed
-
-var serverHostname = flag.String("server", "localhost", "server hostname")
-var port = flag.Int("port", 8666, "server port")
-var botname = flag.String("name", "gobot", "the name that other players will see")
-var verbose = flag.Bool("verbose", false, "run verbosly")
-var forceJSON = flag.Bool("json", false, "force json encoding")
-
-func main() {
-	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
-	rand.Seed(time.Now().UnixNano())
-	var gameId string
-	flag.Parse()
-	if flag.NArg() < 1 {
-		gameId = "debug"
-	} else {
-		gameId = flag.Arg(0)
-	}
-
-	c := &client.Client{
-		Server: *serverHostname,
-		Port:   *port,
-		Name:   *botname,
-		GameId: gameId,
-		// XXX: update with missing fields
-		StatsReq: server.StatsRequest{
-			Hp:            *hp,
-			Speed:         *speed,
-			Acceleration:  *acceleration,
-			ScannerRadius: *scannerRadius,
-			TurnSpeed:     *turnSpeed,
-			FireRate:      *fireRate,
-			WeaponRadius:  *weaponRadius,
-			WeaponDamage:  *weaponDamage,
-			WeaponSpeed:   *weaponSpeed,
-		},
-		Verbose:   *verbose,
-		ForceJSON: *forceJSON,
-	}
-	var err error
-	err = c.Negociate()
-	if err != nil {
-		log.Fatalf("%s: failed to negociate: %s", c.Name, err)
-	}
-
-	c.Player = client.NewSimplePlayer(
-		c.Game.BoardSize.Width,
-		c.Game.BoardSize.Height,
-	)
-
-	if err := c.Play(); err != nil {
-		log.Fatal(err)
-	}
-}

license

@@ -0,0 +1,27 @@
+Copyright (c) 2016, Fraser Graham, Stephen McQuay
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * Neither the name of server nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

player.go

@@ -1,171 +1,59 @@
 package client
 
-import (
-	"fmt"
-	"math"
-	"math/rand"
+import "hackerbots.us/server"
 
-	"bitbucket.org/hackerbots/server"
-	"bitbucket.org/hackerbots/vector"
-)
-
-// Player is the interface that is implemented when specifying non-default
-// player behavior.
+// Player is the interface that defines a player's behavior.
 //
 // The general case will be to implement a Player type that contains the magic
 // required to slay other robots quickly while staying alive for a long time.
 type Player interface {
-	Recv(bs *server.Boardstate)
-	Instruction() map[string]server.Instruction
+
+	// GetStats returns a map with an entry for each robot the player will control
+	// containing the desired stats for that robot
+	GetStats() map[string]server.StatsRequest
+
+	// SetIDs is called from the client once the server
+	// has accepted the robots supplied in GetStats and validated
+	// their config, the data passed into SetIDs is a mapping of
+	// bot name to server side bot ID that is used in all bot
+	// dats sent from the server
+	SetIDs(map[string]string)
+
+	// Update is called on reciept of a board state packet and the response is
+	// the instructions for each robot in a map of robot id to instructions
+	Update(bs *server.Boardstate) map[string]server.Instruction
 }
 
-// SimplePlayer is our default player and stands as a starting point for your
-// own Player implementations.
-type SimplePlayer struct {
-	me             server.Robot
-	width, height  float32
-	knownObstacles map[string]server.Obstacle
-	nearestEnemy   *server.OtherRobot
-	fireat         *vector.Point2d
-	moveto         *vector.Point2d
-	speed          float32
-	maxSpeed       float32
-	safeDistance   float32
+// MultiPlayer wraps multiple players and calls funcitons in Player in
+// appropriate order.
+//
+// Typically used to add a Spectator to a bot.
+type MultiPlayer []Player
+
+// GetStats implements GetStats for a collection of players asking each player
+// for their stats, and returning the configuration of the first player.
+func (mp MultiPlayer) GetStats() map[string]server.StatsRequest {
+	var s map[string]server.StatsRequest
+	for i := len(mp) - 1; i >= 0; i-- {
+		s = mp[i].GetStats()
+	}
+	return s
 }
 
-// NewSimplePlayer simply returns a populated, usable *SimplePlayer
-func NewSimplePlayer(width, height float32) *SimplePlayer {
-	return &SimplePlayer{
-		knownObstacles: make(map[string]server.Obstacle),
-		width:          width,
-		height:         height,
-		maxSpeed:       100,
-		safeDistance:   40,
+// SetIDs passes ids to all players.
+func (mp MultiPlayer) SetIDs(ids map[string]string) {
+	for _, p := range mp {
+		p.SetIDs(ids)
 	}
 }
 
-// Recv is our implementation of receiving a server.Boardstate from the server
-func (p *SimplePlayer) Recv(bs *server.Boardstate) {
-	p.speed = p.maxSpeed
-	if len(bs.MyRobots) > 0 {
-		p.me = bs.MyRobots[0]
-	} else {
-		return
-	}
-
-	p.recon(bs)
-	p.navigate()
-}
-
-func (p *SimplePlayer) navigate() {
-	if p.moveto == nil {
-		p.moveto = p.randomDirection()
-	}
-
-	togo := p.me.Position.Sub(*p.moveto).Mag()
-	if togo < p.safeDistance+5 {
-		p.moveto = p.randomDirection()
-		return
-	}
-	if !p.probe(p.me.Position.Add(p.me.Heading.Scale(p.safeDistance))) {
-		p.speed = 0
-		if !p.probe(*p.moveto) {
-			p.moveto = p.randomDirection()
-			return
-		}
-	}
-	if p.me.Collision != nil {
-		p.moveto = p.randomDirection()
-		p.speed = 0
-		return
-	}
-}
-
-func (p *SimplePlayer) recon(bs *server.Boardstate) {
-	for _, o := range bs.Objects {
-		obj := MiniObstacle(o)
-		if _, ok := p.knownObstacles[obj.Id()]; !ok {
-			p.knownObstacles[obj.Id()] = obj.ToObstacle()
-		}
-	}
-
-	// simplest shooting strategy ... need to do the following:
-	// not shoot through buildings
-	// shoot at where the robot will be, not where it was.
-	p.nearestEnemy = nil
-	p.fireat = nil
-	closest := float32(math.Inf(1))
-	for _, enemy := range bs.OtherRobots {
-		dist := p.me.Position.Sub(enemy.Position).Mag()
-		if dist < closest && dist > p.safeDistance {
-			p.nearestEnemy = &enemy
-		}
-	}
-	if p.nearestEnemy != nil {
-		point := p.nearestEnemy.Position.Add(p.nearestEnemy.Heading.Scale(p.safeDistance))
-		p.fireat = &point
-	}
-}
-
-// Instruction is our default implementation of preparing a map of information
-// to be sent to server.
-func (p *SimplePlayer) Instruction() map[string]server.Instruction {
-	return map[string]server.Instruction{
-		p.me.Id: {
-			MoveTo:      p.moveto,
-			TargetSpeed: &p.speed,
-			FireAt:      p.fireat,
-		},
-	}
-}
-
-func (p *SimplePlayer) randomDirection() *vector.Point2d {
-	pt := vector.Vector2d{
-		X: rand.Float32() * p.width,
-		Y: rand.Float32() * p.height,
-	}.ToPoint()
-	return &pt
-}
-
-func (p *SimplePlayer) probe(destination vector.Point2d) bool {
-	// XXX: make test for this
-	for _, v := range p.knownObstacles {
-		collided, _, _ := vector.RectIntersection(
-			v.Bounds,
-			p.me.Position,
-			destination.Sub(p.me.Position),
-		)
-		if collided {
-			return false
-		}
-	}
-	return true
-}
-
-// MiniObstacle is a convenient way to encode/decode between the [4]int -> server.Obstacle
-type MiniObstacle [4]int
-
-// id is used to calculate a key for use in maps
-func (mo *MiniObstacle) Id() string {
-	return fmt.Sprintf(
-		"%x%x%x%x",
-		mo[0],
-		mo[1],
-		mo[2],
-		mo[3],
-	)
-}
-
-func (mo MiniObstacle) String() string {
-	return mo.Id()
-}
-
-// ToObstacle is where the conversion magic happens
-func (mo *MiniObstacle) ToObstacle() server.Obstacle {
-	return server.Obstacle{
-		Bounds: vector.AABB2d{
-			A: vector.Point2d{X: float32(mo[0]), Y: float32(mo[1])},
-			B: vector.Point2d{X: float32(mo[2]), Y: float32(mo[3])},
-		},
+// Update implements Update for a collection of players sending board state to
+// each player, and returning the instructions associated with the first
+// player.
+func (mp MultiPlayer) Update(bs *server.Boardstate) map[string]server.Instruction {
+	var inst map[string]server.Instruction
+	for i := len(mp) - 1; i >= 0; i-- {
+		inst = mp[i].Update(bs)
 	}
+	return inst
 }

simple_player.go

@@ -0,0 +1,153 @@
+package client
+
+import (
+	"math"
+	"math/rand"
+
+	"hackerbots.us/server"
+	"hackerbots.us/vector"
+)
+
+// SimplePlayer is our default player and stands as a starting point for your
+// own Player implementations.
+type SimplePlayer struct {
+	me             server.Robot
+	width, height  float64
+	knownObstacles map[string]server.Obstacle
+	nearestEnemy   *server.OtherRobot
+	fireat         *vector.Point2d
+	moveto         *vector.Point2d
+	speed          float64
+	maxSpeed       float64
+	safeDistance   float64
+	stats          server.StatsRequest
+}
+
+// NewSimplePlayer simply returns a populated, usable *SimplePlayer
+func NewSimplePlayer(width, height float64, stats server.StatsRequest) *SimplePlayer {
+	return &SimplePlayer{
+		knownObstacles: make(map[string]server.Obstacle),
+		width:          width,
+		height:         height,
+		maxSpeed:       100,
+		safeDistance:   40,
+		stats:          stats,
+	}
+}
+
+func (p *SimplePlayer) SetIDs(map[string]string) {}
+
+// GetStats returns a map with an entry for each robot the player will control
+// containing the desired stats for that robot
+func (p *SimplePlayer) GetStats() map[string]server.StatsRequest {
+	s := make(map[string]server.StatsRequest)
+	s["simple"] = p.stats
+	return s
+}
+
+// Update is our implementation of recieving and processing a server.Boardstate
+// from the server
+func (p *SimplePlayer) Update(bs *server.Boardstate) map[string]server.Instruction {
+	instructions := make(map[string]server.Instruction)
+
+	for _, bot := range bs.MyRobots {
+		p.me = bot
+		p.speed = 1000
+		if p.me.Health <= 0 {
+			continue
+		}
+
+		p.recon(bs)
+		p.navigate()
+
+		probe_point := p.me.Position.Add(p.me.Heading.Scale(p.safeDistance))
+
+		instructions[bot.Id] = server.Instruction{
+			MoveTo:      p.moveto,
+			TargetSpeed: &p.speed,
+			FireAt:      p.fireat,
+			Probe:       &probe_point,
+		}
+	}
+	return instructions
+}
+
+func (p *SimplePlayer) navigate() {
+	if p.moveto == nil {
+		p.moveto = p.randomDirection()
+	}
+
+	togo := p.me.Position.Sub(*p.moveto).Mag()
+	if togo < p.safeDistance+5 {
+		p.moveto = p.randomDirection()
+		return
+	}
+	if !p.probe(p.me.Position.Add(p.me.Heading.Scale(p.safeDistance))) {
+		p.speed = 0
+		if !p.probe(*p.moveto) {
+			p.moveto = p.randomDirection()
+			return
+		}
+	}
+	if p.me.Collision != nil {
+		p.moveto = p.randomDirection()
+		p.speed = 0
+		return
+	}
+}
+
+func (p *SimplePlayer) recon(bs *server.Boardstate) {
+	// XXX: need to keep track of seen objects ..
+
+	// simplest shooting strategy ... need to do the following:
+	// not shoot through buildings
+	// shoot at where the robot will be, not where it was.
+	p.nearestEnemy = nil
+	p.fireat = nil
+	closest := math.Inf(1)
+	for _, enemy := range bs.OtherRobots {
+		dist := p.me.Position.Sub(enemy.Position).Mag()
+		if dist < closest && dist > p.safeDistance {
+			p.nearestEnemy = &enemy
+		}
+	}
+	if p.nearestEnemy != nil {
+		point := p.nearestEnemy.Position.Add(p.nearestEnemy.Heading.Scale(p.safeDistance))
+		p.fireat = &point
+	}
+}
+
+// Instruction is our default implementation of preparing a map of information
+// to be sent to server.
+func (p *SimplePlayer) Instruction() map[string]server.Instruction {
+	return map[string]server.Instruction{
+		p.me.Id: {
+			MoveTo:      p.moveto,
+			TargetSpeed: &p.speed,
+			FireAt:      p.fireat,
+		},
+	}
+}
+
+func (p *SimplePlayer) randomDirection() *vector.Point2d {
+	pt := vector.Vector2d{
+		X: rand.Float64() * p.width,
+		Y: rand.Float64() * p.height,
+	}.ToPoint()
+	return &pt
+}
+
+func (p *SimplePlayer) probe(destination vector.Point2d) bool {
+	// XXX: make test for this
+	for _, v := range p.knownObstacles {
+		collided, _, _ := vector.RectIntersection(
+			v.Bounds,
+			p.me.Position,
+			destination.Sub(p.me.Position),
+		)
+		if collided {
+			return false
+		}
+	}
+	return true
+}

spectator.go

@@ -0,0 +1,237 @@
+package client
+
+import (
+	"errors"
+	"fmt"
+	"math"
+
+	"hackerbots.us/server"
+
+	"github.com/nsf/termbox-go"
+)
+
+const d = 'v'
+const u = '^'
+const r = '>'
+const l = '<'
+
+// NewSpectator initializes and returns a *Spectator.
+func NewSpectator(w, h float64) *Spectator {
+	return &Spectator{
+		StateStream: make(chan *server.Boardstate),
+		Die:         make(chan struct{}),
+		width:       w,
+		height:      h,
+	}
+}
+
+// Spectator encodes a termbox ui.
+type Spectator struct {
+	// max dimensions of field
+	width, height float64
+
+	// dimensions of the terminal window
+	viewX, viewY int
+
+	StateStream chan *server.Boardstate
+
+	// when closed will cause the Spectator to exit the render loop.
+	Die chan struct{}
+
+	// User, if populated, will return a stream of (ostensibly keyboard) events
+	// for use outside of the Spectator.
+	User chan termbox.Event
+}
+
+// SetIDs is implemented so Spectator can be used as a client.Player.
+func (s Spectator) SetIDs(map[string]string) {}
+
+// GetStats is implemented so Spectator can be used as a client.Player.
+func (s Spectator) GetStats() map[string]server.StatsRequest { return nil }
+
+// Update is implemented so Spectator can be used as a client.Player.
+func (s Spectator) Update(bs *server.Boardstate) map[string]server.Instruction {
+	s.StateStream <- bs
+	return nil
+}
+
+// Spectate runs the termbox render loop.
+func (s *Spectator) Spectate() error {
+	err := termbox.Init()
+	if err != nil {
+		return err
+	}
+
+	termbox.SetInputMode(termbox.InputMouse)
+
+	s.viewX, s.viewY = termbox.Size()
+
+	events := make(chan termbox.Event, 1024)
+	go func() {
+		for {
+			events <- termbox.PollEvent()
+		}
+	}()
+
+	termbox.HideCursor()
+	termbox.Clear(termbox.ColorBlack, termbox.ColorBlack)
+
+	func() {
+		for {
+			select {
+			case event := <-events:
+				switch event.Type {
+				case termbox.EventKey:
+					switch event.Key {
+					case termbox.KeyCtrlZ, termbox.KeyCtrlC:
+						return
+					}
+
+					switch event.Ch {
+					case 'q':
+						return
+					case 'f':
+						termbox.SetCell(
+							20,
+							20,
+							'*',
+							termbox.ColorRed, termbox.ColorBlack,
+						)
+					case 'c':
+						termbox.Clear(termbox.ColorBlack, termbox.ColorBlack)
+					}
+
+				case termbox.EventResize:
+					s.viewX, s.viewY = event.Width, event.Height
+				case termbox.EventError:
+					err = fmt.Errorf("Quitting because of termbox error:\n%v\n", event.Err)
+					return
+				}
+
+				if s.User != nil {
+					s.User <- event
+				}
+			case update := <-s.StateStream:
+				termbox.Clear(termbox.ColorBlack, termbox.ColorBlack)
+
+				for _, obstacle := range update.Obstacles {
+					startX := int((obstacle.Bounds.A.X / s.width) * float64(s.viewX))
+					stopX := int((obstacle.Bounds.B.X / s.width) * float64(s.viewX))
+					startY := int((obstacle.Bounds.A.Y / s.height) * float64(s.viewY))
+					stopY := int((obstacle.Bounds.B.Y / s.height) * float64(s.viewY))
+					for x := startX; x < stopX; x++ {
+						for y := startY; y < stopY; y++ {
+							termbox.SetCell(
+								x,
+								s.viewY-y,
+								' ',
+								termbox.ColorBlack, termbox.ColorBlue,
+							)
+						}
+					}
+				}
+
+				for _, bot := range update.OtherRobots {
+					x := int((bot.Position.X / s.width) * float64(s.viewX))
+					y := int((bot.Position.Y / s.height) * float64(s.viewY))
+					var b rune
+					if math.Abs(bot.Heading.X) > math.Abs(bot.Heading.Y) {
+						if bot.Heading.X > 0 {
+							b = r
+						} else {
+							b = l
+						}
+					} else {
+						if bot.Heading.Y > 0 {
+							b = u
+						} else {
+							b = d
+						}
+					}
+					c := termbox.ColorRed
+					if bot.Health <= 0 {
+						c = termbox.ColorBlack
+					}
+					termbox.SetCell(
+						x,
+						s.viewY-y,
+						b,
+						c, termbox.ColorBlack,
+					)
+				}
+
+				for _, p := range update.Projectiles {
+					x := int((p.Position.X / s.width) * float64(s.viewX))
+					y := int((p.Position.Y / s.height) * float64(s.viewY))
+					termbox.SetCell(
+						x,
+						s.viewY-y,
+						'·',
+						termbox.ColorWhite|termbox.AttrBold, termbox.ColorBlack,
+					)
+				}
+
+				for _, splosion := range update.Splosions {
+					startX := int(((splosion.Position.X - float64(splosion.Radius)) / s.width) * float64(s.viewX))
+					startY := int(((splosion.Position.Y - float64(splosion.Radius)) / s.height) * float64(s.viewY))
+					stopX := int(((splosion.Position.X+float64(splosion.Radius))/s.width)*float64(s.viewX)) + 1
+					stopY := int(((splosion.Position.Y+float64(splosion.Radius))/s.height)*float64(s.viewY)) + 1
+					for x := startX; x < stopX; x++ {
+						for y := startY; y < stopY; y++ {
+							realX := float64(x) * s.width / float64(s.viewX)
+							realY := float64(y) * s.height / float64(s.viewY)
+							dX := realX - splosion.Position.X
+							dY := realY - splosion.Position.Y
+							curRad := math.Sqrt(dX*dX + dY*dY)
+							if curRad < float64(splosion.Radius) {
+								termbox.SetCell(
+									x,
+									s.viewY-y,
+									'·',
+									termbox.ColorYellow|termbox.AttrBold, termbox.ColorRed,
+								)
+							}
+						}
+					}
+				}
+
+				for _, bot := range update.MyRobots {
+					x := int((bot.Position.X / s.width) * float64(s.viewX))
+					y := int((bot.Position.Y / s.height) * float64(s.viewY))
+					var b rune
+					if math.Abs(bot.Heading.X) > math.Abs(bot.Heading.Y) {
+						if bot.Heading.X > 0 {
+							b = r
+						} else {
+							b = l
+						}
+					} else {
+						if bot.Heading.Y > 0 {
+							b = u
+						} else {
+							b = d
+						}
+					}
+					c := termbox.ColorWhite
+					if bot.Health <= 0 {
+						c = termbox.ColorBlack
+					}
+					termbox.SetCell(
+						x,
+						s.viewY-y,
+						b,
+						c|termbox.AttrBold, termbox.ColorBlack,
+					)
+				}
+
+				err = termbox.Flush()
+			case <-s.Die:
+				err = errors.New("was told to die")
+				return
+			}
+		}
+	}()
+
+	termbox.Close()
+	return err
+}