func updateGroundImage(ground *ebiten.Image) error {
if err := ground.Clear(); err != nil {
return err
}
x16, y16 := theViewport.Position()
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(-x16)/16, float64(-y16)/16)
if err := ground.DrawImage(repeatedBgImage, op); err != nil {
return err
}
return nil
}
func updateGroundImage(ground *ebiten.Image) error {
if err := ground.Clear(); err != nil {
return err
}
x16, y16 := thePlayer.Position()
a := thePlayer.Angle()
gw, gh := ground.Size()
w, h := gophersImage.Size()
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(-x16)/16, float64(-y16)/16)
op.GeoM.Translate(float64(-w*2), float64(-h*2))
op.GeoM.Rotate(float64(-a)*2*math.Pi/maxAngle + math.Pi*3.0/2.0)
op.GeoM.Translate(float64(gw)/2, float64(gh)-32)
if err := ground.DrawImage(repeatedGophersImage, op); err != nil {
return err
}
return nil
}