76 lines
1.7 KiB
Go
76 lines
1.7 KiB
Go
package systems
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import (
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"fmt"
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"image"
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. "openquell/components"
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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 CollectibleSystem struct {
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World *ecs.World
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Selector *generic.Filter3[Position, Collectible, Renderable]
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EntitiesToRemove []ecs.Entity
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}
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func NewCollectibleSystem(world *ecs.World) *CollectibleSystem {
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system := &CollectibleSystem{
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Selector: generic.NewFilter3[Position, Collectible, Renderable](),
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World: world,
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}
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return system
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}
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func (system *CollectibleSystem) CheckPlayerCollision(
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playerposition *Position,
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playervelocity *Velocity) (bool, image.Point) {
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particle_pos := image.Point{}
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var bumped bool
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query := system.Selector.Query(system.World)
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for query.Next() {
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colposition, collectible, _ := query.Get()
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ok, _ := playerposition.Intersects(colposition, playervelocity)
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if ok {
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fmt.Printf("bumped into collectible %v\n", collectible)
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system.EntitiesToRemove = append(system.EntitiesToRemove, query.Entity())
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particle_pos.X = colposition.X
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particle_pos.Y = colposition.Y
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bumped = true
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}
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}
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return bumped, particle_pos
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}
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func (system *CollectibleSystem) Update() {
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// remove collectible if collected
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for _, entity := range system.EntitiesToRemove {
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system.World.RemoveEntity(entity)
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}
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system.EntitiesToRemove = []ecs.Entity{}
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}
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func (system *CollectibleSystem) Draw(screen *ebiten.Image) {
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// write the movable 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, _, sprite := query.Get()
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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(sprite.Image, op)
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}
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}
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