FPS counter in title bar

gfx/gfx.go

@@ -5,7 +5,6 @@ import (
 	"image"
 	"image/color"
 	_ "image/png"
-	"log"
 	"math"
 	"math/rand"
 	"os"
@@ -153,23 +152,14 @@ func renderRacer(ctx context, oldRacer, racer game.Racer, active bool, c pixel.R
 			X: pos.X + w,
 			Y: pos.Y - w,
 		}
-
-		var ur pixel.Vec
-		if ctx.tween == 1 {
-			ur = pixel.Vec{
-				X: pos.X + w*float64(racer.Kinetics.V+1),
-				Y: pos.Y + w,
-			}
-			log.Printf("ur: %+v", ur)
-			ur.X = math.Max(ur.X, ll.X)
-		} else {
-			ur = pixel.Vec{
+		ur := pixel.Vec{
 			X: pos.X + w*float64(racer.Kinetics.V+1),
 			Y: pos.Y + w,
 		}
+		if ctx.tween < 1 {
 			ur.X = math.Min(ur.X, newPos.X+racerWidth)
-			ur.X = math.Max(ur.X, ll.X)
 		}
+		ur.X = math.Max(ur.X, ll.X)
 
 		im.Push(ll)
 		im.Push(ur)

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"log"
 	"math/rand"
 	"relay/game"
@@ -38,6 +39,11 @@ func run() error {
 	sOld := s
 	turn := 1
 
+	var (
+		frames = 0
+		second = time.Tick(time.Second)
+	)
+
 	for !w.Closed() && !s.GameOver {
 		switch {
 		case w.Pressed(pixelgl.KeyQ):
@@ -61,6 +67,13 @@ func run() error {
 		}
 
 		w.Update()
+		frames++
+		select {
+		case <-second:
+			w.SetTitle(fmt.Sprintf("%s | FPS: %d", cfg.Title, frames))
+			frames = 0
+		default:
+		}
 	}
 	return nil
 }