Added subtle bg color shift, hex values added to screen.

examples/splashmenu/scenes/menu.go

@@ -4,6 +4,7 @@ import (
 	"cosmos/diego/groovy"
 	"image/color"
 	"log"
+	"math"
 	"strconv"
 
 	"github.com/hajimehoshi/ebiten/v2"
@@ -15,11 +16,15 @@ import (
 )
 
 var (
-	titleFont font.Face
-	menuFont  font.Face
+	titleFont           font.Face
+	menuFont            font.Face
+	backgroundBaseColor color.RGBA
 )
 
 func init() {
+
+	backgroundBaseColor = color.RGBA{0x33, 0x33, 0x99, 0xFF}
+
 	tt, err := opentype.Parse(fonts.PressStart2P_ttf)
 	if err != nil {
 		log.Fatal(err)
@@ -46,14 +51,15 @@ func init() {
 }
 
 type Menu struct {
-	bgcolor color.RGBA
-	options map[int]MenuOption
-	events  map[groovy.SceneEvent]func()
+	bgcolor   color.RGBA
+	increment int
+	options   map[int]MenuOption
+	events    map[groovy.SceneEvent]func()
 }
 
 func NewMenu() Menu {
 	return Menu{
-		bgcolor: color.RGBA{0x33, 0x33, 0x99, 0xFF},
+		bgcolor: backgroundBaseColor,
 		events:  make(map[groovy.SceneEvent]func()),
 	}
 }
@@ -62,6 +68,9 @@ func (m *Menu) Draw(screen *ebiten.Image) {
 	screen.Fill(m.bgcolor)
 	text.Draw(screen, "menu", titleFont, 40, 40, color.White)
 
+	bgcolor := " 0x" + strconv.FormatUint(uint64(m.bgcolor.R), 16) + " 0x" + strconv.FormatUint(uint64(m.bgcolor.G), 16) + " 0x" + strconv.FormatUint(uint64(m.bgcolor.B), 16)
+
+	text.Draw(screen, bgcolor, menuFont, 40, 700, color.White)
 	m.RenderOptions(screen)
 }
 
@@ -89,6 +98,7 @@ func (m *Menu) RenderOptions(screen *ebiten.Image) {
 }
 
 func (m *Menu) Update() error {
+	m.increment++
 
 	var keysPressed []ebiten.Key
 	keysPressed = inpututil.AppendPressedKeys(keysPressed[:0])
@@ -103,5 +113,11 @@ func (m *Menu) Update() error {
 		}
 	}
 
+	colorOffset := uint8(int(math.Sin(float64(m.increment)/300) * 6))
+
+	m.bgcolor.R = (colorOffset + backgroundBaseColor.R) % 0xFF
+	m.bgcolor.G = (colorOffset + backgroundBaseColor.G) % 0xFF
+	m.bgcolor.B = (colorOffset + backgroundBaseColor.B) % 0xFF
+
 	return nil
 }