49 lines
959 B
Go
49 lines
959 B
Go
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package engine
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import (
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"encoding/gob"
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"io/fs"
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)
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var (
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animCache = make(map[assetKey]Anim)
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_ Animer = &AnimRef{}
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_ Loader = &AnimRef{}
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)
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func init() {
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gob.Register(AnimRef{})
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}
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// AnimRef manages an Anim using a premade AnimDef from the cache.
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type AnimRef struct {
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Path string
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anim Anim
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}
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func (r *AnimRef) Load(assets fs.FS) error {
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// Fast path: set r.anim to a copy
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anim, found := animCache[assetKey{assets, r.Path}]
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if found {
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r.anim = anim
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return nil
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}
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// Slow path: load from gobz file
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if err := loadGobz(&r.anim, assets, r.Path); err != nil {
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return err
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}
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animCache[assetKey{assets, r.Path}] = r.anim
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return nil
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}
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// CurrentFrame returns the value of CurrentFrame from r.anim.
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func (r *AnimRef) CurrentFrame() int { return r.anim.CurrentFrame() }
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// Reset calls Reset on r.anim.
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func (r *AnimRef) Reset() { r.anim.Reset() }
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// Update calls Update on r.anim.
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func (r *AnimRef) Update() error { return r.anim.Update() }
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