Add brake

flags.go

@@ -0,0 +1,13 @@
+//go:build !js || !wasm
+// +build !js !wasm
+
+package main
+
+import (
+	"flag"
+)
+
+func parseFlags(game *Game) {
+	flag.IntVar(&game.debug, "debug", 0, "print debug information")
+	flag.Parse()
+}

flags_web.go

@@ -0,0 +1,14 @@
+//go:build js && wasm
+// +build js,wasm
+
+package main
+
+import (
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+func parseFlags(game *Game) {
+	game.wasm = true
+
+	ebiten.SetFullscreen(true)
+}

go.mod

@@ -8,7 +8,7 @@ require (
 )
 
 require (
-	github.com/ebitengine/purego v0.4.0-alpha.4 // indirect
+	github.com/ebitengine/purego v0.4.0-alpha.5 // indirect
 	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20221017161538-93cebf72946b // indirect
 	github.com/jezek/xgb v1.1.0 // indirect
 	github.com/qmuntal/gltf v0.24.0 // indirect

go.sum

@@ -1,5 +1,5 @@
-github.com/ebitengine/purego v0.4.0-alpha.4 h1:Y7yIV06Yo5M2BAdD7EVPhfp6LZ0tEcQo5770OhYUVes=
-github.com/ebitengine/purego v0.4.0-alpha.4/go.mod h1:ah1In8AOtksoNK6yk5z1HTJeUkC1Ez4Wk2idgGslMwQ=
+github.com/ebitengine/purego v0.4.0-alpha.5 h1:1jd+ClW6gD2x2F/+j4lCGc3TQMWL3hNYgLu/xF9Jz0g=
+github.com/ebitengine/purego v0.4.0-alpha.5/go.mod h1:ah1In8AOtksoNK6yk5z1HTJeUkC1Ez4Wk2idgGslMwQ=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20221017161538-93cebf72946b h1:GgabKamyOYguHqHjSkDACcgoPIz3w0Dis/zJ1wyHHHU=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20221017161538-93cebf72946b/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-test/deep v1.0.1 h1:UQhStjbkDClarlmv0am7OXXO4/GaPdCGiUiMTvi28sg=

main.go

@@ -1,13 +1,14 @@
 package main
 
 import (
-	"flag"
 	"fmt"
 	"image/color"
 	"math"
 	"math/rand"
 	"os"
 
+	"github.com/hajimehoshi/ebiten/v2/inpututil"
+
 	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
 
 	_ "embed"
@@ -24,6 +25,8 @@ type Game struct {
 
 	truck *garbageTruck
 
+	wasm bool
+
 	debug int
 }
 
@@ -245,18 +248,21 @@ func (g *Game) Init() {
 
 	// Garbage truck.
 	{
-		mesh := tetra3d.NewCubeMesh()
-		model := tetra3d.NewModel(mesh, "")
-		model.Color = tetra3d.NewColor(0.12, 0.44, 0.24, 1)
-		model.Grow(-0.75, -0.25, -0.3)
+		{
+			mesh := tetra3d.NewCubeMesh()
+			model := tetra3d.NewModel(mesh, "")
+			model.Color = tetra3d.NewColor(0.12, 0.44, 0.24, 1)
+			model.Grow(-0.75, -0.25, -0.3)
 
-		g.truck.Model = model
-		g.Scene.Root.AddChildren(g.truck.Model)
+			g.truck.Model = model
+			g.Scene.Root.AddChildren(g.truck.Model)
+		}
 
-		lightX := 0.55
-
-		headlightDistance := 0.85
-		headlightShade := float32(0.75)
+		const (
+			lightX            = 0.55
+			headlightDistance = 0.85
+			headlightShade    = float32(0.75)
+		)
 
 		// Headlights.
 		{
@@ -305,6 +311,18 @@ func (g *Game) Update() error {
 		return nil
 	}
 
+	if !g.wasm && ebiten.IsKeyPressed(ebiten.KeyEscape) {
+		os.Exit(0)
+		return nil
+	}
+
+	if inpututil.IsKeyJustPressed(ebiten.KeyV) && ebiten.IsKeyPressed(ebiten.KeyControl) && ebiten.IsKeyPressed(ebiten.KeyShift) {
+		g.debug++
+		if g.debug > 1 {
+			g.debug = 0
+		}
+	}
+
 	const moveSize = 1
 	moveX, moveY := 0, 0
 	if ebiten.IsKeyPressed(ebiten.KeyLeft) || ebiten.IsKeyPressed(ebiten.KeyA) {
@@ -319,10 +337,11 @@ func (g *Game) Update() error {
 	if ebiten.IsKeyPressed(ebiten.KeyDown) || ebiten.IsKeyPressed(ebiten.KeyS) {
 		moveY += moveSize
 	}
+	braking := ebiten.IsKeyPressed(ebiten.KeySpace)
 
 	// Update truck.
 	t := g.truck
-	t.MoveX, t.MoveY = moveX, moveY
+	t.MoveX, t.MoveY, t.Braking = moveX, moveY, braking
 	t.Update()
 
 	// Move truck model and camera.
@@ -334,7 +353,6 @@ func (g *Game) Update() error {
 }
 
 func (g *Game) Draw(screen *ebiten.Image) {
-
 	// Clear the screen with a color.
 	screen.Fill(color.RGBA{60, 70, 80, 255})
 
@@ -371,10 +389,7 @@ func main() {
 	ebiten.SetTPS(100)
 
 	game := NewGame()
-
-	flag.IntVar(&game.debug, "debug", 0, "print debug information")
-	flag.Parse()
-
+	parseFlags(game)
 	if err := ebiten.RunGame(game); err != nil {
 		panic(err)
 	}

truck.go

@@ -16,8 +16,9 @@ type garbageTruck struct {
 	angle           float64
 	angularVelocity float64
 
-	MoveX int // -1 left, 0 center, 1 right
-	MoveY int // -1 backward, 0 center, 1 forward
+	MoveX   int // -1 left, 0 center, 1 right
+	MoveY   int // -1 backward, 0 center, 1 forward
+	Braking bool
 
 	Model *tetra3d.Model
 }
@@ -38,6 +39,10 @@ func (t *garbageTruck) Update() {
 
 	isDriving := true
 	if isDriving { // TODO
+		if t.Braking {
+			t.MoveY = 0
+		}
+
 		if t.MoveY < 0 {
 			t.power += powerFactor
 		} else {
@@ -49,6 +54,12 @@ func (t *garbageTruck) Update() {
 			t.reverse -= reverseFactor
 		}
 
+		if t.Braking {
+			const adjustment = 0.9975
+			t.power = t.power * adjustment
+			t.reverse = t.reverse * adjustment
+		}
+
 		t.power = math.Max(0, math.Min(maxPower, t.power))
 		t.reverse = math.Max(0, math.Min(maxReverse, t.reverse))
 
@@ -68,7 +79,6 @@ func (t *garbageTruck) Update() {
 
 		t.xVelocity += math.Sin(t.angle) * (t.power - t.reverse)
 		t.yVelocity += math.Cos(t.angle) * (t.power - t.reverse)
-
 		t.x += t.xVelocity
 		t.y -= t.yVelocity
 		t.xVelocity *= drag