From b4c2cdccaff745393dffa0ba9df07ae8348e2383 Mon Sep 17 00:00:00 2001
From: LittleSheep <littlesheep.code@hotmail.com>
Date: Thu, 18 Jul 2024 14:47:41 +0800
Subject: [PATCH] :sparkles: Profiler and fixed tps

---
 pkg/internal/entities/player.go |  6 +++++
 pkg/internal/land/prof.go       | 39 ++++++++++++++++++++++++++++++++
 pkg/internal/land/root.go       | 40 +++++++++++++++++++++++++++++++++
 pkg/main.go                     | 18 +++++++--------
 4 files changed, 93 insertions(+), 10 deletions(-)
 create mode 100644 pkg/internal/land/prof.go

diff --git a/pkg/internal/entities/player.go b/pkg/internal/entities/player.go
index 26b7788..ea100e4 100644
--- a/pkg/internal/entities/player.go
+++ b/pkg/internal/entities/player.go
@@ -56,4 +56,10 @@ func (p *Player) Draw(pen *sdl.Renderer) {
 		W: int32(p.Size.X),
 		H: int32(p.Size.Y),
 	})
+
+	for _, child := range p.Children {
+		if drawableChild, ok := child.(land.DrawableObject); ok {
+			drawableChild.Draw(pen)
+		}
+	}
 }
diff --git a/pkg/internal/land/prof.go b/pkg/internal/land/prof.go
new file mode 100644
index 0000000..8177b59
--- /dev/null
+++ b/pkg/internal/land/prof.go
@@ -0,0 +1,39 @@
+package land
+
+import (
+	"log"
+	"sync/atomic"
+	"time"
+)
+
+type PerformanceAnalyzer struct {
+	tickCount int64
+	drawCount int64
+}
+
+func (p *PerformanceAnalyzer) Tick() {
+	atomic.AddInt64(&p.tickCount, 1)
+}
+
+func (p *PerformanceAnalyzer) Draw() {
+	atomic.AddInt64(&p.drawCount, 1)
+}
+
+func (p *PerformanceAnalyzer) KeepResetting(duration time.Duration) {
+	ticker := time.NewTicker(duration)
+	defer ticker.Stop()
+	for {
+		<-ticker.C
+		log.Printf("TPS: %d FPS: %d\n", atomic.LoadInt64(&p.tickCount), atomic.LoadInt64(&p.drawCount))
+		atomic.StoreInt64(&p.tickCount, 0)
+		atomic.StoreInt64(&p.drawCount, 0)
+	}
+}
+
+func (p *PerformanceAnalyzer) GetTPS() int64 {
+	return atomic.LoadInt64(&p.tickCount)
+}
+
+func (p *PerformanceAnalyzer) GetFPS() int64 {
+	return atomic.LoadInt64(&p.drawCount)
+}
diff --git a/pkg/internal/land/root.go b/pkg/internal/land/root.go
index 8ff3ce2..4f4a854 100644
--- a/pkg/internal/land/root.go
+++ b/pkg/internal/land/root.go
@@ -2,16 +2,56 @@ package land
 
 import (
 	"github.com/veandco/go-sdl2/sdl"
+	"time"
 )
 
 type RootObject struct {
 	BaseObject
+
+	Analyzer *PerformanceAnalyzer
+}
+
+func NewRootObject() *RootObject {
+	in := &RootObject{
+		Analyzer: &PerformanceAnalyzer{},
+	}
+
+	go in.Analyzer.KeepResetting(1 * time.Second)
+
+	return in
+}
+
+func (p *RootObject) RunEventLoop(tickDuration time.Duration) {
+	for {
+		startTime := time.Now()
+
+		p.Update()
+
+		elapsed := time.Since(startTime)
+		hangDuration := tickDuration - elapsed
+		if hangDuration > 0 {
+			time.Sleep(hangDuration)
+		}
+	}
+}
+
+func (p *RootObject) Update() {
+	p.BaseObject.Update()
+
+	p.Analyzer.Tick()
 }
 
 func (p *RootObject) Draw(pen *sdl.Renderer) {
+	// Render background and clear previous state
+	pen.SetDrawColor(77, 77, 77, 255)
+	pen.Clear()
+
+	// Render each child
 	for _, child := range p.Children {
 		if drawableChild, ok := child.(DrawableObject); ok {
 			drawableChild.Draw(pen)
 		}
 	}
+
+	p.Analyzer.Draw()
 }
diff --git a/pkg/main.go b/pkg/main.go
index 261211b..68af000 100644
--- a/pkg/main.go
+++ b/pkg/main.go
@@ -5,14 +5,14 @@ import (
 	"git.solsynth.dev/highland/codingland/pkg/internal/land"
 	"log"
 	"runtime"
+	"time"
 
 	"github.com/veandco/go-sdl2/sdl"
 )
 
 const (
-	windowWidth  = 640
+	windowWidth  = 720
 	windowHeight = 480
-	playerSize   = 50
 )
 
 func init() {
@@ -37,12 +37,15 @@ func main() {
 	}
 	defer renderer.Destroy()
 
-	root := &land.RootObject{}
+	root := land.NewRootObject()
 	root.AddChild(&entities.Player{
-		Position: land.Vector2D{X: windowWidth / 2, Y: windowHeight / 2},
-		Size:     land.Vector2D{X: playerSize, Y: playerSize},
+		Position: land.Vector2D{X: windowWidth/2 - 25, Y: windowHeight/2 - 25},
+		Size:     land.Vector2D{X: 50, Y: 50},
 	})
 
+	// 10ms delay use be 100tps average
+	go root.RunEventLoop(10 * time.Millisecond)
+
 	running := true
 	for running {
 		for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
@@ -52,11 +55,6 @@ func main() {
 			}
 		}
 
-		root.Update()
-
-		renderer.SetDrawColor(0, 0, 0, 255)
-		renderer.Clear()
-
 		root.Draw(renderer)
 
 		renderer.Present()