extract command loop

game/commands.go

@@ -1,5 +1,9 @@
 package game
 
+import (
+	"github.com/faiface/pixel/pixelgl"
+)
+
 type Command int
 
 const (
@@ -13,12 +17,45 @@ const (
 
 var validCommands = []Command{coast, speedUp, slowDown, left, right, clearObstacle}
 
-func PollCommands(s State) []Command {
+func CommandLoop(w *pixelgl.Window, s State, stateCA chan<- State) {
+	cmdC := make(chan []Command)
+	go func() { cmdC <- pollCommands(s) }()
+
+	stateCB := make(chan State)
+
+	turn := 1
+	sOld := s
+
+	for !w.Closed() {
+		switch {
+		case w.Pressed(pixelgl.KeyQ):
+			w.SetClosed(true)
+			return
+		case w.JustPressed(pixelgl.KeyEnter) || w.Pressed(pixelgl.KeySpace):
+			cmds := <-cmdC
+			s = UpdateState(s, sOld, cmds)
+			turn++
+			if s.GameOver {
+				s = NewState()
+				sOld = s
+				turn = 1
+			}
+			go func() {
+				s := <-stateCB
+				cmdC <- pollCommands(s)
+			}()
+			stateCA <- s
+			stateCB <- s
+		}
+
+		w.UpdateInput()
+	}
+}
+
+func pollCommands(s State) []Command {
 	cmds := make([]Command, len(s.Teams))
 	for i := range s.Teams {
-		cmd := chooseCommand(s, i)
-		//log.Printf("team %d chose to %v", i, cmd)
-		cmds[i] = cmd
+		cmds[i] = chooseCommand(s, i)
 	}
 	return cmds
 }

game/env.go

@@ -55,7 +55,7 @@ func randomOpenPosition(ts []Team, os []Obstacle) Position {
 func randomObstacles(teams []Team) []Obstacle {
 	var os []Obstacle
 
-	const numObstacles = 2 * NumTeams
+	const numObstacles = 3 * NumTeams
 	for i := 0; i < numObstacles; i++ {
 		os = append(os, Obstacle{
 			Position: randomOpenPosition(teams, os),

game/game.go

@@ -222,5 +222,5 @@ const (
 	numRacers  = 3
 	NumTeams   = 8
 	NumLanes   = NumTeams
-	baseCharge = 16
+	baseCharge = 14
 )

gfx/gfx.go

@@ -16,12 +16,13 @@ import (
 	"golang.org/x/image/colornames"
 )
 
-func RenderLoop(w *pixelgl.Window, s game.State, sOld game.State, stateC <-chan game.State, sb *SpriteBank) {
+func RenderLoop(w *pixelgl.Window, s game.State, stateC <-chan game.State, sb *SpriteBank) {
+	sOld := s
 	var (
 		frames = 0
 		second = time.Tick(time.Second)
 		rs     = renderState{
-			Frames: 15,
+			Frames: 30,
 		}
 	)
 
@@ -194,7 +195,7 @@ func renderRacer(ctx context, batch *pixel.Batch, oldRacer, racer game.Racer, ac
 	sprite := pixel.NewSprite(pic, bounds)
 	sprite.DrawColorMask(batch, pixel.IM.Moved(pos).ScaledXY(pos, pixel.Vec{1.7, 1.7}), c)
 
-	renderFuelGuage(batch, pos, racer.Battery)
+	//renderFuelGuage(batch, pos, racer.Battery)
 }
 
 func renderFuelGuage(b *pixel.Batch, pos pixel.Vec, batt game.Battery) {

main.go

@@ -31,39 +31,13 @@ func run() error {
 	if err != nil {
 		return err
 	}
-	sOld := s
-	turn := 1
 
-	cmdC := make(chan []game.Command)
-	go func() { cmdC <- game.PollCommands(s) }()
+	stateC := make(chan game.State)
 
-	stateCA := make(chan game.State)
-	stateCB := make(chan game.State)
-
-	go gfx.RenderLoop(w, s, sOld, stateCA, sb)
+	go gfx.RenderLoop(w, s, stateC, sb)
+	go game.CommandLoop(w, s, stateC)
 
 	for !w.Closed() {
-		switch {
-		case w.Pressed(pixelgl.KeyQ):
-			return nil
-		case w.JustPressed(pixelgl.KeySpace) || true:
-			cmds := <-cmdC
-			s = game.UpdateState(s, sOld, cmds)
-			turn++
-			if s.GameOver {
-				s = game.NewState()
-				sOld = s
-				turn = 1
-			}
-			go func() {
-				s := <-stateCB
-				cmdC <- game.PollCommands(s)
-			}()
-			stateCA <- s
-			stateCB <- s
-		}
-
-		w.UpdateInput()
 	}
 	return nil
 }