Moved definition of what robots have which stats into the player interface

simple_player.go

@@ -0,0 +1,151 @@
+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,
+	}
+}
+
+// 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
+}