fuck engo

engo/TrafficManager/systems/citySystem.go

@@ -0,0 +1,86 @@
+package systems
+
+import (
+	"engo.io/ecs"
+	"engo.io/engo"
+	"engo.io/engo/common"
+	"fmt"
+	"log"
+)
+
+type System interface {
+	// Update is ran every frame, with `dt` being the time
+	// in seconds since the last frame
+	Update(dt float32)
+
+	// Remove removes an Entity from the System
+	Remove(ecs.BasicEntity)
+}
+
+type City struct {
+	ecs.BasicEntity
+	common.RenderComponent
+	common.SpaceComponent
+}
+
+type MouseTracker struct {
+    ecs.BasicEntity
+    common.MouseComponent
+}
+
+type CityBuildingSystem struct {
+	mouseTracker MouseTracker
+
+	world *ecs.World
+}
+
+// Remove is called whenever an Entity is removed from the World, in order to remove it from this sytem as well
+func (*CityBuildingSystem) Remove(ecs.BasicEntity) {}
+
+// Update is ran every frame, with `dt` being the time
+// in seconds since the last frame
+func (cb *CityBuildingSystem) Update(dt float32) {
+	if engo.Input.Button("AddCity").JustPressed()  {
+		fmt.Println("The gamer pressed F1")
+
+		city := City{BasicEntity: ecs.NewBasic()}
+
+		city.SpaceComponent = common.SpaceComponent{
+	    Position: engo.Point{cb.mouseTracker.MouseX, cb.mouseTracker.MouseY},
+	    Width: 30,
+	    Height: 64,
+	}
+
+	texture, err := common.LoadedSprite("textures/city.png")
+	if err != nil {
+	    log.Println("Unable to load texture: " + err.Error())
+	}
+
+	city.RenderComponent = common.RenderComponent{
+		Drawable: texture,
+		Scale:    engo.Point{X: 0.1, Y: 0.1},
+	}
+
+	for _, system := range cb.world.Systems() {
+			switch sys := system.(type) {
+			case *common.RenderSystem:
+				sys.Add(&city.BasicEntity, &city.RenderComponent, &city.SpaceComponent)
+			}
+		}
+	}
+}
+
+func (cb *CityBuildingSystem) New(w *ecs.World) {
+	cb.world = w
+	fmt.Println("CityBuildingSystem was added to the Scene")
+
+	cb.mouseTracker.BasicEntity = ecs.NewBasic()
+	cb.mouseTracker.MouseComponent = common.MouseComponent{Track: true}
+	
+	for _, system := range w.Systems() {
+		switch sys := system.(type) {
+		case *common.MouseSystem:
+			sys.Add(&cb.mouseTracker.BasicEntity, &cb.mouseTracker.MouseComponent, nil, nil)
+		}
+	}
+}

engo/TrafficManager/traffic.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"engo.io/engo"
+	"engo.io/engo/common"
+	"engo.io/ecs"
+	"image/color"
+	"./systems"
+)
+
+type myScene struct {}
+
+type City struct {
+	ecs.BasicEntity
+	common.RenderComponent
+	common.SpaceComponent
+}	
+
+
+// Type uniquely defines your game type
+func (*myScene) Type() string { return "myGame" }
+
+// Preload is called before loading any assets from the disk,
+// to allow you to register / queue them
+func (*myScene) Preload() {
+	engo.Files.Load("city.png")
+}
+
+// Setup is called before the main loop starts. It allows you
+// to add entities and systems to your Scene.
+func (*myScene) Setup(world *ecs.World) {
+	engo.Input.RegisterButton("AddCity", engo.F1)
+	common.SetBackground(color.White)
+	world.AddSystem(&common.RenderSystem{})
+	world.AddSystem(&common.MouseSystem{})
+	
+	world.AddSystem(&systems.CityBuildingSystem{})
+}
+
+func main() {
+	opts := engo.RunOptions{
+		Title: "Hello World",
+		Width:  400,
+		Height: 400,
+	}
+	engo.Run(opts, &myScene{})
+}