Add title screen

asset/asset.go

@@ -0,0 +1,58 @@
+package asset
+
+import (
+	"embed"
+	"image"
+
+	_ "image/jpeg"
+
+	"code.rocketnine.space/tslocum/gas-station-sim/world"
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+//go:embed image
+var fs embed.FS
+
+var (
+	ImageInterior = interiorImage()
+	ImageExterior = exteriorImage()
+)
+
+func interiorImage() *ebiten.Image {
+	img := LoadImage("image/interior.jpg")
+
+	n := ebiten.NewImage(world.ScreenWidth, world.ScreenHeight)
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Scale(0.64, 0.64)
+	op.GeoM.Translate(-42, -42)
+	n.DrawImage(img, op)
+
+	return n
+}
+
+func exteriorImage() *ebiten.Image {
+	img := LoadImage("image/exterior.jpg")
+
+	n := ebiten.NewImage(world.ScreenWidth, world.ScreenHeight)
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Scale(0.9, 0.9)
+	op.GeoM.Translate(-23, -2)
+	n.DrawImage(img, op)
+
+	return n
+}
+
+func LoadImage(p string) *ebiten.Image {
+	f, err := fs.Open(p)
+	if err != nil {
+		panic(err)
+	}
+	defer f.Close()
+
+	baseImg, _, err := image.Decode(f)
+	if err != nil {
+		panic(err)
+	}
+
+	return ebiten.NewImageFromImage(baseImg)
+}

game/game.go

@@ -3,6 +3,7 @@ package game
 import (
 	"log"
 
+	"code.rocketnine.space/tslocum/gas-station-sim/asset"
 	"code.rocketnine.space/tslocum/gas-station-sim/entity"
 	"code.rocketnine.space/tslocum/gas-station-sim/system"
 	"code.rocketnine.space/tslocum/gas-station-sim/world"
@@ -18,32 +19,27 @@ const shaderSrc = `
 package main
 
 func Fragment(position vec4, tex vec2, color vec4) vec4 {
+	xCol := int(position.x) % int(2) == int(0)
+	yCol := int(position.y) % int(2) == int(0)
+
     clr := imageSrc0UnsafeAt(tex)
 	brightness := max(max(clr.r, clr.g), clr.b)
+
 	if brightness >  0.75 {
 			return vec4(1, 1, 1, 1)
 	} else if brightness >  0.5 {
-			xCol := int(position.x) % int(2) == int(0)
-			yCol := int(position.y) % int(2) == int(0)
-
 			if (!xCol && yCol) {
 					return vec4(0, 0, 0, 1)
 			} else {
 					return vec4(1, 1, 1, 1)
 			}
 	} else if brightness >  0.25 {
-			xCol := int(position.x) % int(2) == int(0)
-			yCol := int(position.y) % int(2) == int(0)
-
 			if (xCol && yCol) || (!xCol && !yCol) {
 					return vec4(1, 1, 1, 1)
 			} else {
 					return vec4(0, 0, 0, 1)
 			}
-	} else if brightness >  0.001 {
-			xCol := int(position.x) % int(2) == int(0)
-			yCol := int(position.y) % int(2) == int(0)
-
+	} else if brightness >  0.075 {
 			if (xCol && yCol) {
 					return vec4(1, 1, 1, 1)
 			} else {
@@ -90,6 +86,8 @@ func (g *Game) Update() error {
 func (g *Game) Draw(screen *ebiten.Image) {
 	//g.target.Clear()
 
+	g.target.DrawImage(asset.ImageExterior, nil)
+
 	err := gohan.Draw(g.target)
 	if err != nil {
 		log.Fatal(err)

system/render.go

@@ -1,7 +1,7 @@
 package system
 
 import (
-	"image/color"
+	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
 
 	"code.rocketnine.space/tslocum/gas-station-sim/world"
 	"code.rocketnine.space/tslocum/gohan"
@@ -9,8 +9,9 @@ import (
 )
 
 const (
-	gradientWidth  = 128
-	gradientHeight = 64
+	introText       = "Gas Station\n Simulator"
+	introTextWidth  = 6*len(introText) - 2
+	introTextHeight = 50
 )
 
 type Render struct {
@@ -21,17 +22,22 @@ type Render struct {
 
 func (r *Render) Update(e gohan.Entity) error {
 	if r.i == nil {
-		r.i = ebiten.NewImage(gradientWidth, gradientHeight)
-		for y := 0; y < 64; y++ {
+		img := ebiten.NewImage(introTextWidth, introTextHeight)
+		for i := 0; i < 4; i++ { // Draw four times to increase shadow effect
+			ebitenutil.DebugPrintAt(img, introText, -1, -3)
+		}
+
+		r.i = ebiten.NewImage(introTextWidth*2, introTextHeight*2)
+		/*for y := 0; y < 64; y++ {
 			for x := 0; x < 128; x++ {
-				vx := x
-				if vx == 0 {
-					vx = 1
-				}
-				brightness := uint8(float64(255) * (float64(vx) / gradientWidth))
+				brightness := uint8(float64(255) * (float64(x) / gradientWidth))
 				r.i.Set(x, y, color.RGBA{brightness, brightness, brightness, 255})
 			}
-		}
+		}*/
+
+		op := &ebiten.DrawImageOptions{}
+		op.GeoM.Scale(2, 2)
+		r.i.DrawImage(img, op)
 
 		r.dx, r.dy = 1, 1
 		return nil
@@ -40,10 +46,10 @@ func (r *Render) Update(e gohan.Entity) error {
 	r.x += r.dx
 	r.y += r.dy
 
-	if r.x == 0 || r.x == world.ScreenWidth-gradientWidth {
+	if r.x == 0 || r.x == float64(world.ScreenWidth-introTextWidth) {
 		r.dx *= -1
 	}
-	if r.y == 0 || r.y == world.ScreenHeight-gradientHeight {
+	if r.y == 0 || r.y == float64(world.ScreenHeight-introTextHeight) {
 		r.dy *= -1
 	}