mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-15 07:27:32 +01:00
72 lines
1.6 KiB
Go
72 lines
1.6 KiB
Go
// Copyright 2018 The Ebiten Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"image/color"
|
|
"log"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2"
|
|
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
|
|
)
|
|
|
|
var pointerImage = ebiten.NewImage(8, 8)
|
|
|
|
func init() {
|
|
pointerImage.Fill(color.RGBA{0xff, 0, 0, 0xff})
|
|
}
|
|
|
|
const (
|
|
screenWidth = 640
|
|
screenHeight = 480
|
|
)
|
|
|
|
type Game struct {
|
|
x float64
|
|
y float64
|
|
}
|
|
|
|
func (g *Game) Update() error {
|
|
dx, dy := ebiten.Wheel()
|
|
g.x += dx
|
|
g.y += dy
|
|
return nil
|
|
}
|
|
|
|
func (g *Game) Draw(screen *ebiten.Image) {
|
|
op := &ebiten.DrawImageOptions{}
|
|
op.GeoM.Translate(g.x, g.y)
|
|
op.GeoM.Translate(screenWidth/2, screenHeight/2)
|
|
screen.DrawImage(pointerImage, op)
|
|
|
|
ebitenutil.DebugPrint(screen,
|
|
fmt.Sprintf("Move the red point by mouse wheel\n(%0.2f, %0.2f)", g.x, g.y))
|
|
}
|
|
|
|
func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
|
|
return screenWidth, screenHeight
|
|
}
|
|
|
|
func main() {
|
|
g := &Game{x: 0.0, y: 0.0}
|
|
|
|
ebiten.SetWindowSize(screenWidth, screenHeight)
|
|
ebiten.SetWindowTitle("Wheel (Ebitengine Demo)")
|
|
if err := ebiten.RunGame(g); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|