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until I can think of a better way

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This commit is contained in:
Josh Deprez 2021-07-31 21:23:58 +10:00 committed by Josh Deprez
parent d52753a6d0
commit d8ecea05e5
2 changed files with 34 additions and 44 deletions
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30
engine/asset.go
View file

@ -1,7 +1,6 @@
package engine
import (
"encoding/gob"
"image"
"io/fs"
"log"
@ -10,15 +9,19 @@ import (
)
var (
// Assets (usually embed.FS)
AssetFS fs.FS
animDefCache = make(map[string]*AnimDef)
imageCache = make(map[string]*ebiten.Image)
// AnimDefs are easier to write as Go expressions -
// so just set this.
AnimDefCache map[string]*AnimDef
imageCache = make(map[string]*ebiten.Image)
)
// AnimRef loads AnimDef from an asset and manages an Anim using it.
// AnimRef manages an Anim using a premade AnimDef from the cache.
type AnimRef struct {
Path string
Key string
anim *Anim
}
@ -27,23 +30,12 @@ func (r *AnimRef) Anim() *Anim {
if r.anim != nil {
return r.anim
}
if ad := animDefCache[r.Path]; ad != nil {
if ad := AnimDefCache[r.Key]; ad != nil {
r.anim = &Anim{Def: ad}
return r.anim
}
f, err := AssetFS.Open(r.Path)
if err != nil {
log.Fatalf("Couldn't open asset: %v", err)
}
defer f.Close()
dec := gob.NewDecoder(f)
ad := &AnimDef{}
if err := dec.Decode(ad); err != nil {
log.Fatalf("Couldn't decode asset: %v", err)
}
animDefCache[r.Path] = ad
r.anim = &Anim{Def: ad}
return r.anim
log.Fatalf("Unknown AnimDef %q", r.Key)
return nil
}
// ImageRef loads images from the AssetFS into *ebiten.Image form.

48
main.go
View file

@ -19,6 +19,23 @@ func main() {
ebiten.SetWindowTitle("TODO")
engine.AssetFS = assets
engine.AnimDefCache = map[string]*engine.AnimDef{
"green_tiles": {
Frames: []engine.AnimFrame{
{Frame: 0, Duration: 16},
{Frame: 1, Duration: 16},
{Frame: 2, Duration: 16},
},
},
"red_tiles": {
Frames: []engine.AnimFrame{
{Frame: 3, Duration: 12},
{Frame: 4, Duration: 12},
{Frame: 5, Duration: 12},
{Frame: 6, Duration: 12},
},
},
}
staticTiles := [][]engine.StaticTile{
{0, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1},
@ -46,31 +63,12 @@ func main() {
}
}
/*
tiles[4][5] = &engine.AnimatedTile{
Anim: engine.Anim{
Def: &engine.AnimDef{
Frames: []engine.AnimFrame{
{Frame: 0, Duration: 16},
{Frame: 1, Duration: 16},
{Frame: 2, Duration: 16},
},
},
},
}
tiles[6][7] = &engine.AnimatedTile{
Anim: engine.Anim{
Def: &engine.AnimDef{
Frames: []engine.AnimFrame{
{Frame: 3, Duration: 12},
{Frame: 4, Duration: 12},
{Frame: 5, Duration: 12},
{Frame: 6, Duration: 12},
},
},
},
}
*/
tiles[4][5] = &engine.AnimatedTile{
AnimRef: engine.AnimRef{Key: "green_tiles"},
}
tiles[6][7] = &engine.AnimatedTile{
AnimRef: engine.AnimRef{Key: "red_tiles"},
}
game := &engine.Game{
ScreenHeight: screenHeight,