Vary team colors.

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"image/color"
 	"log"
 	"time"
 
@@ -23,13 +24,14 @@ func run() {
 	}
 
 	s := newState()
+	colors := teamColors(s.teams)
 
 	start := time.Now()
 
 	for !w.Closed() && !s.gameOver {
 		w.Clear(colornames.Peru)
 		s = updateState(s)
-		render(s, w, time.Since(start))
+		render(s, w, time.Since(start), colors)
 		w.Update()
 	}
 }
@@ -38,26 +40,27 @@ func main() {
 	pixelgl.Run(run)
 }
 
-func render(s state, w *pixelgl.Window, d time.Duration) {
+func render(s state, w *pixelgl.Window, d time.Duration, colors map[*team]pixel.RGBA) {
 	b := w.Bounds()
 	im := imdraw.New(nil)
 	hOffset := b.Size().X / steps
 	vOffset := b.Size().Y / (numTeams + 1)
+	width := 20
 
 	for i, t := range s.teams {
 		for j, bot := range t.bots {
 			if &t.bots[j] == t.baton.holder {
 				im.Color = pixel.RGB(0, 1, 0)
 			} else {
-				im.Color = pixel.RGB(1, 0, 0)
+				im.Color = colors[&s.teams[i]]
 			}
-			from := pixel.V(b.Min.X+25, b.Min.Y+float64(i+1)*vOffset)
+			from := pixel.V(b.Min.X+float64(width)/2, b.Min.Y+float64(i+1)*vOffset)
 			pos := from.Add(pixel.V(float64(bot.pos)*hOffset, 0))
 
 			im.Push(pos)
 
 			im.Clear()
-			im.Circle(50, 0)
+			im.Circle(float64(width), 0)
 
 			im.Draw(w)
 		}
@@ -87,6 +90,25 @@ func newState() state {
 	}
 }
 
+func teamColors(ts []team) map[*team]pixel.RGBA {
+	m := make(map[*team]pixel.RGBA)
+	for i := range ts {
+		var c color.RGBA
+		switch i {
+		case 0:
+			c = colornames.Cyan
+		case 1:
+			c = colornames.Gold
+		case 2:
+			c = colornames.Lavender
+		case 3:
+			c = colornames.Indigo
+		}
+		m[&ts[i]] = pixel.ToRGBA(c)
+	}
+	return m
+}
+
 type team struct {
 	bots  []bot
 	baton baton
@@ -147,7 +169,7 @@ func gameOver(s state) bool {
 }
 
 const (
-	steps    = 150
+	steps    = 250
-	numBots  = 5
+	numBots  = 10
-	numTeams = 2
+	numTeams = 4
 )