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Simplify examples

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This commit is contained in:
Hajime Hoshi 2014-12-23 02:43:26 +09:00
parent b3581d1c7a
commit 0fe8387a5a
4 changed files with 35 additions and 40 deletions
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8
example/alphablending/main.go
View File

@ -36,7 +36,7 @@ var (
saved bool
)
func Update(r *ebiten.Image) error {
func Update(screen *ebiten.Image) error {
count++
count %= 600
diff := float64(count) * 0.2
@ -58,17 +58,17 @@ func Update(r *ebiten.Image) error {
}
}
r.Fill(color.NRGBA{0x00, 0x00, 0x80, 0xff})
screen.Fill(color.NRGBA{0x00, 0x00, 0x80, 0xff})
for i := 0; i < 10; i++ {
geo := ebiten.TranslateGeometry(0, float64(i)*(diff))
clr := ebiten.ColorMatrixI()
if err := ebiten.DrawWholeImage(r, tmpRenderTarget, geo, clr); err != nil {
if err := ebiten.DrawWholeImage(screen, tmpRenderTarget, geo, clr); err != nil {
return err
}
}
if !saved && ebiten.IsKeyPressed(ebiten.KeySpace) {
if err := ebitenutil.SaveImageAsPNG("out.png", r); err != nil {
if err := ebitenutil.SaveImageAsPNG("out.png", screen); err != nil {
return err
}
saved = true

19
example/mosaic/main.go
View File

@ -30,33 +30,32 @@ const (
const mosaicRatio = 16
type Game struct {
var (
gophersImage *ebiten.Image
gophersRenderTarget *ebiten.Image
}
)
func (g *Game) Update(r *ebiten.Image) error {
func Update(screen *ebiten.Image) error {
geo := ebiten.ScaleGeometry(1.0/mosaicRatio, 1.0/mosaicRatio)
ebiten.DrawWholeImage(g.gophersRenderTarget, g.gophersImage, geo, ebiten.ColorMatrixI())
ebiten.DrawWholeImage(gophersRenderTarget, gophersImage, geo, ebiten.ColorMatrixI())
geo = ebiten.ScaleGeometry(mosaicRatio/2.0, mosaicRatio/2.0)
ebiten.DrawWholeImage(r, g.gophersRenderTarget, geo, ebiten.ColorMatrixI())
ebiten.DrawWholeImage(screen, gophersRenderTarget, geo, ebiten.ColorMatrixI())
return nil
}
func main() {
g := new(Game)
var err error
g.gophersImage, _, err = ebitenutil.NewImageFromFile("images/gophers.jpg", ebiten.FilterNearest)
gophersImage, _, err = ebitenutil.NewImageFromFile("images/gophers.jpg", ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
w, h := g.gophersImage.Size()
g.gophersRenderTarget, err = ebiten.NewImage(w/mosaicRatio, h/mosaicRatio, ebiten.FilterNearest)
w, h := gophersImage.Size()
gophersRenderTarget, err = ebiten.NewImage(w/mosaicRatio, h/mosaicRatio, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(g.Update, screenWidth, screenHeight, 2, "Mosaic (Ebiten Demo)"); err != nil {
if err := ebiten.Run(Update, screenWidth, screenHeight, 2, "Mosaic (Ebiten Demo)"); err != nil {
log.Fatal(err)
}
}

33
example/paint/main.go
View File

@ -30,21 +30,15 @@ const (
screenHeight = 240
)
type Game struct {
inited bool
var (
count int
brushRenderTarget *ebiten.Image
canvasRenderTarget *ebiten.Image
}
)
func (g *Game) Update(r *ebiten.Image) error {
func Update(screen *ebiten.Image) error {
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
g.count++
}
if !g.inited {
g.brushRenderTarget.Fill(color.White)
g.canvasRenderTarget.Fill(color.White)
g.inited = true
count++
}
mx, my := ebiten.CursorPosition()
@ -52,29 +46,32 @@ func (g *Game) Update(r *ebiten.Image) error {
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
geo := ebiten.TranslateGeometry(float64(mx), float64(my))
clr := ebiten.ScaleColor(1.0, 0.25, 0.25, 1.0)
theta := 2.0 * math.Pi * float64(g.count%60) / 60.0
theta := 2.0 * math.Pi * float64(count%60) / 60.0
clr.Concat(ebiten.RotateHue(theta))
ebiten.DrawWholeImage(g.canvasRenderTarget, g.brushRenderTarget, geo, clr)
ebiten.DrawWholeImage(canvasRenderTarget, brushRenderTarget, geo, clr)
}
ebiten.DrawWholeImage(r, g.canvasRenderTarget, ebiten.GeometryMatrixI(), ebiten.ColorMatrixI())
ebiten.DrawWholeImage(screen, canvasRenderTarget, ebiten.GeometryMatrixI(), ebiten.ColorMatrixI())
ebitenutil.DebugPrint(r, fmt.Sprintf("(%d, %d)", mx, my))
ebitenutil.DebugPrint(screen, fmt.Sprintf("(%d, %d)", mx, my))
return nil
}
func main() {
g := new(Game)
var err error
g.brushRenderTarget, err = ebiten.NewImage(1, 1, ebiten.FilterNearest)
brushRenderTarget, err = ebiten.NewImage(4, 4, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
g.canvasRenderTarget, err = ebiten.NewImage(screenWidth, screenHeight, ebiten.FilterNearest)
brushRenderTarget.Fill(color.White)
canvasRenderTarget, err = ebiten.NewImage(screenWidth, screenHeight, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(g.Update, screenWidth, screenHeight, 2, "Paint (Ebiten Demo)"); err != nil {
canvasRenderTarget.Fill(color.White)
if err := ebiten.Run(Update, screenWidth, screenHeight, 2, "Paint (Ebiten Demo)"); err != nil {
log.Fatal(err)
}
}

15
example/perspective/main.go
View File

@ -28,13 +28,13 @@ const (
screenHeight = 240
)
type Game struct {
var (
gophersImage *ebiten.Image
}
)
func (g *Game) Update(r *ebiten.Image) error {
func Update(screen *ebiten.Image) error {
parts := []ebiten.ImagePart{}
w, h := g.gophersImage.Size()
w, h := gophersImage.Size()
for i := 0; i < h; i++ {
width := float64(w) + float64(i)*0.75
x := float64(h-i) * 0.75 / 2
@ -48,18 +48,17 @@ func (g *Game) Update(r *ebiten.Image) error {
geo := ebiten.TranslateGeometry(-maxWidth/2, -float64(h)/2)
geo.Concat(ebiten.ScaleGeometry(0.4, 0.4))
geo.Concat(ebiten.TranslateGeometry(screenWidth/2, screenHeight/2))
r.DrawImage(g.gophersImage, parts, geo, ebiten.ColorMatrixI())
screen.DrawImage(gophersImage, parts, geo, ebiten.ColorMatrixI())
return nil
}
func main() {
g := new(Game)
var err error
g.gophersImage, _, err = ebitenutil.NewImageFromFile("images/gophers.jpg", ebiten.FilterNearest)
gophersImage, _, err = ebitenutil.NewImageFromFile("images/gophers.jpg", ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(g.Update, screenWidth, screenHeight, 2, "Perspective (Ebiten Demo)"); err != nil {
if err := ebiten.Run(Update, screenWidth, screenHeight, 2, "Perspective (Ebiten Demo)"); err != nil {
log.Fatal(err)
}
}