3 files changed, 116 insertions, 0 deletions
diff --git a/engine/CoreObjects/Object.go b/engine/CoreObjects/Object.go
new file mode 100644
index 0000000..6f0a808
--- /dev/null
+++ b/engine/CoreObjects/Object.go
@@ -0,0 +1,8 @@
+package coreobjects
+
+type Object interface {
+	Create(SceneManager)
+	Destroy()
+	Update()
+	Draw()
+}
diff --git a/engine/CoreObjects/OverlayScene.go b/engine/CoreObjects/OverlayScene.go
new file mode 100644
index 0000000..5c43e11
--- /dev/null
+++ b/engine/CoreObjects/OverlayScene.go
@@ -0,0 +1,60 @@
+package coreobjects
+
+import (
+	"fmt"
+
+	settings "github.com/DegustatorPonos/RuinesOfRafdolon/Settings"
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+type OveralyScene struct {
+	FPS FpsMeter
+}
+
+func (base *OveralyScene) Create(_ SceneManager) {
+}
+
+func (base *OveralyScene) Destroy() {
+}
+
+func (base *OveralyScene) Update() {
+	base.FPS.Update()
+}
+
+func (base *OveralyScene) Draw() {
+	var appendix = ""
+	if settings.Current.Version.IsBeta {
+		appendix = " b"
+	}
+	var version = fmt.Sprintf("%d.%d.%d%s", settings.Current.Version.MajorVersion, settings.Current.Version.MinorVersion, settings.Current.Version.Patch, appendix)	
+	rl.DrawText(version, 2, int32(rl.GetScreenHeight()) - 20, 20, rl.Black)
+	base.FPS.Draw()
+}
+
+// =============== FPS METER ===============
+
+type FpsMeter struct {
+	deltaTime float32
+	Value float32
+	FramesElapsed uint
+}
+
+func (base *FpsMeter) Create(SceneManager) {
+}
+
+func (base *FpsMeter) Destroy() {
+}
+
+func (base *FpsMeter) Update() {
+	base.deltaTime += rl.GetFrameTime()
+	base.FramesElapsed++
+	if base.deltaTime >= 1 {
+		base.Value = float32(base.FramesElapsed)
+		base.deltaTime = 0
+		base.FramesElapsed = 0
+	}
+}
+
+func (base *FpsMeter) Draw() {
+	rl.DrawText(fmt.Sprintf("%v FPS", base.Value), 0, 0, 20, rl.Green)
+}
diff --git a/engine/CoreObjects/Scene.go b/engine/CoreObjects/Scene.go
new file mode 100644
index 0000000..bcb8c63
--- /dev/null
+++ b/engine/CoreObjects/Scene.go
@@ -0,0 +1,48 @@
+package coreobjects
+
+type SceneManager struct {
+	OverlayScene Scene
+	SelectedScene Scene
+}
+
+type Scene interface {
+	Create(SceneManager)
+	Destroy()
+	Update()
+	Draw()
+}
+
+func InitSceneManager() SceneManager {
+	return SceneManager{
+		OverlayScene: &OveralyScene{},
+		SelectedScene: nil,
+	}
+}
+
+func (base *SceneManager) ChangeScene(newScene Scene) {
+	if base.SelectedScene != nil {
+		base.SelectedScene.Destroy()
+	}
+	base.SelectedScene = newScene
+	base.SelectedScene.Create(*base)
+}
+
+func (base *SceneManager) Update() {
+	if (base.SelectedScene != nil) {
+		base.SelectedScene.Update()
+	}
+
+	if (base.OverlayScene != nil) {
+		base.OverlayScene.Update()
+	}
+}
+
+func (base *SceneManager) Draw() {
+	if (base.SelectedScene != nil) {
+		base.SelectedScene.Draw()
+	}
+
+	if (base.OverlayScene != nil) {
+		base.OverlayScene.Draw()
+	}
+}