54 lines
1 KiB
Go
54 lines
1 KiB
Go
package engine
|
|
|
|
import (
|
|
"encoding/gob"
|
|
"image"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2"
|
|
)
|
|
|
|
func init() {
|
|
gob.Register(Sprite{})
|
|
}
|
|
|
|
// Sprite combines an Actor with the ability to Draw from a single spritesheet.
|
|
type Sprite struct {
|
|
Actor
|
|
FrameSize image.Point
|
|
FrameOffset image.Point
|
|
Hidden bool
|
|
ID
|
|
Src ImageRef
|
|
DrawOrder
|
|
|
|
anim *Anim
|
|
}
|
|
|
|
func (s *Sprite) Draw(screen *ebiten.Image, opts ebiten.DrawImageOptions) {
|
|
if s.Hidden {
|
|
return
|
|
}
|
|
dp := s.Pos.Add(s.FrameOffset)
|
|
var geom ebiten.GeoM
|
|
geom.Translate(float64(dp.X), float64(dp.Y))
|
|
geom.Concat(opts.GeoM)
|
|
opts.GeoM = geom
|
|
|
|
frame := s.anim.CurrentFrame()
|
|
src := s.Src.Image()
|
|
w, _ := src.Size()
|
|
sp := image.Pt((frame*s.FrameSize.X)%w, ((frame*s.FrameSize.X)/w)*s.FrameSize.Y)
|
|
|
|
screen.DrawImage(src.SubImage(image.Rectangle{sp, sp.Add(s.FrameSize)}).(*ebiten.Image), &opts)
|
|
}
|
|
|
|
func (s *Sprite) Scan() []interface{} { return []interface{}{&s.Actor} }
|
|
|
|
func (s *Sprite) SetAnim(a *Anim) {
|
|
if s.anim != a {
|
|
a.Reset()
|
|
}
|
|
s.anim = a
|
|
}
|
|
|
|
func (s *Sprite) Update() error { return s.anim.Update() }
|