more gobs and interface cleanup

engine/actor.go

@@ -13,11 +13,6 @@ func init() {
 // Thorson-style movement:
 // https://maddythorson.medium.com/celeste-and-towerfall-physics-d24bd2ae0fc5
 
-// Collider components have tangible form.
-type Collider interface {
-	CollidesWith(image.Rectangle) bool
-}
-
 // Actor handles basic movement.
 type Actor struct {
 	CollisionDomain string

engine/interface.go

@@ -1,6 +1,15 @@
 package engine
 
-import "github.com/hajimehoshi/ebiten/v2"
+import (
+	"image"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+// Collider components have tangible form.
+type Collider interface {
+	CollidesWith(image.Rectangle) bool
+}
 
 // Drawer components can draw themselves. Draw is called often.
 // Each component is responsible for calling Draw on its child components.

engine/sprite.go

@@ -1,11 +1,16 @@
 package engine
 
 import (
+	"encoding/gob"
 	"image"
 
 	"github.com/hajimehoshi/ebiten/v2"
 )
 
+func init() {
+	gob.Register(Sprite{})
+}
+
 // Sprite combines an Actor with the ability to Draw from a single spritesheet.
 type Sprite struct {
 	Actor

game/aw.go

@@ -1,6 +1,7 @@
 package game
 
 import (
+	"encoding/gob"
 	"image"
 
 	"drjosh.dev/gurgle/engine"
@@ -8,6 +9,10 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/inpututil"
 )
 
+func init() {
+	gob.Register(Awakeman{})
+}
+
 type Awakeman struct {
 	engine.Sprite