Run the "start" function on adding objects.

src/cmd/test/main.go

@@ -38,6 +38,8 @@ func NewPlayer() *Player {
 }
 
 func (p *Player) Start(e *gx.Engine) {
+	c := e.Camera()
+	c.Object.T.RA = gx.V(360, -120)
 }
 
 func (p *Player) Update(e *gx.Engine) error {
@@ -84,12 +86,14 @@ func (p *Player) Update(e *gx.Engine) error {
 		} else {
 			c.Object.T.RA.X += gx.Pi * p.MoveSpeed * dt
 		}
+		log.Println(c.Object.T.RA.X)
 	case ebiten.KeyX :
 		if e.KeyIsPressed(ebiten.KeyShift) {
 			c.Object.T.RA.Y -= gx.Pi * p.MoveSpeed * dt
 		} else {
 			c.Object.T.RA.Y += gx.Pi * p.MoveSpeed * dt
 		}
+		log.Println(c.Object.T.RA.Y)
 	}}
 
 	return nil

src/gx/main.go

@@ -66,6 +66,7 @@ func (e *Engine) Add(l Layer, b any) {
 	beh, ok := b.(Behaver)
 	if ok {
 		e.AddBehaver(beh)
+		beh.Start(e)
 	}
 
 	drw, ok := b.(Drawer)

src/gx/transform.go

@@ -18,6 +18,10 @@ type Transform struct {
 	R Float
 }
 
+func V(x, y Float) Vector {
+	return Vector{x, y}
+}
+
 func T() Transform {
 	ret := Transform{}
 	return ret