78 lines
1.7 KiB
Go
78 lines
1.7 KiB
Go
package systems
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import (
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. "openquell/components"
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"openquell/config"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/mlange-42/arche/ecs"
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"github.com/mlange-42/arche/generic"
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)
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type AnimationSystem struct {
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World *ecs.World
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Selector *generic.Filter2[Position, Renderable]
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Cellsize int
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}
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func NewAnimationSystem(world *ecs.World, cellsize int) System {
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system := &AnimationSystem{
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Selector: generic.NewFilter2[Position, Renderable](),
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World: world,
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Cellsize: cellsize,
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}
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return system
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}
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func (system *AnimationSystem) Update() error {
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EntitiesToRemove := []ecs.Entity{}
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query := system.Selector.Query(system.World)
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for query.Next() {
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_, render := query.Get()
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if render.Animate.Active {
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if render.Animate.Timer.IsReady() {
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switch {
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// animation shows from earlier tick, animate
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case render.Animate.Index > -1 && render.Animate.Index < len(render.Animate.Tiles)-1:
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render.Animate.Index += 1
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render.Animate.Timer.Start(config.ANIMATION_LOOPWAIT)
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default:
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// last sprite reached
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if render.Animate.Loop {
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render.Animate.Index = 0
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} else {
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EntitiesToRemove = append(EntitiesToRemove, query.Entity())
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}
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}
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} else {
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render.Animate.Timer.Update()
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}
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}
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}
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for _, entity := range EntitiesToRemove {
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system.World.RemoveEntity(entity)
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}
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return nil
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}
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func (system *AnimationSystem) Draw(screen *ebiten.Image) {
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// write animations (these are no tiles!)
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op := &ebiten.DrawImageOptions{}
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query := system.Selector.Query(system.World)
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for query.Next() {
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pos, render := query.Get()
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if render.Animate.Active {
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op.GeoM.Reset()
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op.GeoM.Translate(float64(pos.X), float64(pos.Y))
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screen.DrawImage(render.Animate.Tiles[render.Animate.Index], op)
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}
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}
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}
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