Starting to experiment with rays and collisions. New scene to demonstrate.

examples/splashmenu/scenes/rays.go

@@ -0,0 +1,49 @@
+package splashmenu
+
+import (
+	"cosmos/diego/groovy"
+	"image/color"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+const (
+	BGCOLOR = 0xCCCCCC
+)
+
+type Rays struct {
+	events     map[groovy.SceneEvent]func()
+	increment  int
+	Dimensions groovy.Area
+	bgcolor    color.RGBA
+}
+
+func NewRays() Rays {
+	return Rays{
+		events:    make(map[groovy.SceneEvent]func()),
+		increment: 0,
+		bgcolor: color.RGBA{
+			R: BGCOLOR >> 0x10 & 0xff,
+			G: BGCOLOR >> 0x08 & 0xff,
+			B: BGCOLOR >> 0x00 & 0xff,
+			A: 0xff,
+		},
+	}
+}
+
+func (r *Rays) Update() error {
+	r.increment++
+	return nil
+}
+
+func (r *Rays) Draw(screen *ebiten.Image) {
+	screen.Fill(r.bgcolor)
+}
+
+func (r *Rays) SetDimensions(a groovy.Area) {
+	r.Dimensions = a
+}
+
+func (r *Rays) SetEventHandler(event groovy.SceneEvent, f func()) {
+	r.events[event] = f
+}