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examples/edge: Update

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This commit is contained in:
Hajime Hoshi 2017-02-05 16:05:32 +09:00
parent 98054928ac
commit 6929c70c06
1 changed files with 13 additions and 2 deletions
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15
examples/edge/main.go
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@ -17,11 +17,13 @@
package main package main
import ( import (
"fmt"
"image/color" "image/color"
"log" "log"
"math" "math"
"github.com/hajimehoshi/ebiten" "github.com/hajimehoshi/ebiten"
"github.com/hajimehoshi/ebiten/ebitenutil"
) )
const ( const (
@ -37,7 +39,12 @@ var (
) )
func update(screen *ebiten.Image) error { func update(screen *ebiten.Image) error {
angle++ if ebiten.IsKeyPressed(ebiten.KeyLeft) {
angle--
}
if ebiten.IsKeyPressed(ebiten.KeyRight) {
angle++
}
angle %= 360 angle %= 360
if err := screen.Fill(color.White); err != nil { if err := screen.Fill(color.White); err != nil {
return err return err
@ -45,16 +52,20 @@ func update(screen *ebiten.Image) error {
op := &ebiten.DrawImageOptions{} op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(-float64(colorImageWidth)/2, -float64(colorImageHeight)/2) op.GeoM.Translate(-float64(colorImageWidth)/2, -float64(colorImageHeight)/2)
op.GeoM.Rotate(float64(angle) * math.Pi / 180) op.GeoM.Rotate(float64(angle) * math.Pi / 180)
op.GeoM.Scale(4, 4)
op.GeoM.Translate(screenWidth/2, screenHeight/2) op.GeoM.Translate(screenWidth/2, screenHeight/2)
if err := screen.DrawImage(colorImage, op); err != nil { if err := screen.DrawImage(colorImage, op); err != nil {
return err return err
} }
if err := ebitenutil.DebugPrint(screen, fmt.Sprintf("Angle: %d [deg]", angle)); err != nil {
return err
}
return nil return nil
} }
func main() { func main() {
var err error var err error
colorImage, err = ebiten.NewImage(colorImageWidth, colorImageHeight, ebiten.FilterLinear) colorImage, err = ebiten.NewImage(colorImageWidth, colorImageHeight, ebiten.FilterNearest)
if err != nil { if err != nil {
log.Fatal(err) log.Fatal(err)
} }