86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
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package systems
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import (
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"engo.io/ecs"
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"engo.io/engo"
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"engo.io/engo/common"
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"fmt"
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"log"
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)
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type System interface {
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// Update is ran every frame, with `dt` being the time
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// in seconds since the last frame
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Update(dt float32)
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// Remove removes an Entity from the System
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Remove(ecs.BasicEntity)
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}
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type City struct {
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ecs.BasicEntity
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common.RenderComponent
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common.SpaceComponent
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}
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type MouseTracker struct {
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ecs.BasicEntity
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common.MouseComponent
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}
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type CityBuildingSystem struct {
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mouseTracker MouseTracker
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world *ecs.World
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}
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// Remove is called whenever an Entity is removed from the World, in order to remove it from this sytem as well
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func (*CityBuildingSystem) Remove(ecs.BasicEntity) {}
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// Update is ran every frame, with `dt` being the time
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// in seconds since the last frame
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func (cb *CityBuildingSystem) Update(dt float32) {
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if engo.Input.Button("AddCity").JustPressed() {
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fmt.Println("The gamer pressed F1")
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city := City{BasicEntity: ecs.NewBasic()}
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city.SpaceComponent = common.SpaceComponent{
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Position: engo.Point{cb.mouseTracker.MouseX, cb.mouseTracker.MouseY},
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Width: 30,
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Height: 64,
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}
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texture, err := common.LoadedSprite("textures/city.png")
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if err != nil {
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log.Println("Unable to load texture: " + err.Error())
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}
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city.RenderComponent = common.RenderComponent{
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Drawable: texture,
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Scale: engo.Point{X: 0.1, Y: 0.1},
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}
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for _, system := range cb.world.Systems() {
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switch sys := system.(type) {
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case *common.RenderSystem:
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sys.Add(&city.BasicEntity, &city.RenderComponent, &city.SpaceComponent)
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}
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}
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}
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}
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func (cb *CityBuildingSystem) New(w *ecs.World) {
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cb.world = w
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fmt.Println("CityBuildingSystem was added to the Scene")
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cb.mouseTracker.BasicEntity = ecs.NewBasic()
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cb.mouseTracker.MouseComponent = common.MouseComponent{Track: true}
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for _, system := range w.Systems() {
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switch sys := system.(type) {
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case *common.MouseSystem:
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sys.Add(&cb.mouseTracker.BasicEntity, &cb.mouseTracker.MouseComponent, nil, nil)
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}
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}
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}
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