...

src/cmd/test/main.go

@@ -34,7 +34,9 @@ func (p *Player) Update(e *gx.Engine) {
 	//p.Sprite.Object.T.P.Y += 40 * e.DT()
 	dt := e.DT()
 	c := e.Camera()
-	c.Object.T.P.X += 40 * dt
+	//c.Object.T.P.X += 40 * dt
+	//c.Object.T.S.X += .01 * dt
+	c.Object.T.R += .2 * dt
 }
 
 func main() {

src/gix/main.go

@@ -0,0 +1,5 @@
+package gix
+
+import (
+	"github.com/hajimehoshi/ebiten/v2/inpututil"
+)

src/gx/camera.go

@@ -14,8 +14,8 @@ func (c *Camera)Matrix(scale bool) Matrix {
 	g := &Matrix{}
 
 	g.Translate(
-		c.Object.T.RA.X,
-		c.Object.T.RA.Y,
+		-c.Object.T.RA.X,
+		-c.Object.T.RA.Y,
 	)
 
 	g.Rotate(c.Object.T.R)

src/gx/keys.go

@@ -0,0 +1,8 @@
+package gx
+
+import (
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type Key = ebiten.Key
+

src/gx/main.go

@@ -2,6 +2,7 @@ package gx
 
 import (
 	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/inpututil"
 	"github.com/surdeus/godat/src/sparsex"
 	//"fmt"
 	"time"
@@ -23,6 +24,7 @@ type Engine struct {
 	lastTime time.Time
 	dt Float
 	camera *Camera
+	keys []Key
 }
 
 type engine Engine
@@ -31,6 +33,10 @@ func (e *Engine) Camera() *Camera {
 	return e.camera
 }
 
+func (e *Engine) Keys() []Key {
+	return e.keys
+}
+
 func New(
 	cfg *WindowConfig,
 ) *Engine {
@@ -43,7 +49,8 @@ func New(
 		camera: &Camera{
 			Object: &Object{
 				T: Transform{
-					S: Vector{0.1, 1},
+					S: Vector{1, 1},
+					RA: Vector{480, 320},
 				},
 			},
 		},
@@ -85,6 +92,9 @@ func (e *Engine) AddBehaver(b Behaver) {
 func (e *engine) Update() error {
 	eng := (*Engine)(e)
 
+	e.keys = inpututil.
+		AppendPressedKeys(e.keys[:0])
+
 	e.dt = time.Since(e.lastTime).Seconds()
 	for _, v := range eng.behavers {
 		v.Update(eng)