...

ax/ani.go

@@ -6,11 +6,11 @@ import (
 
 // Unique identifier for animation
 // in the animation set.
-type AnimationId int
+type AnimationID int
 
 // The type describes set of animations
 // to switch between.
-type AnimationSet map[AnimationId] Animation
+type AnimationSet map[AnimationID] Animation
 
 // Make new animation set from an image.
 func AnimationSetFromImage(

ax/define.go

@@ -12,13 +12,13 @@ type RectIndex struct {
 // to structurely define
 // animations.
 type AnimationDefine struct{
-	Id AnimationId
+	Id AnimationID
 	Indexes []RectIndex
 }
 
 // Animation define shortcut.
 func AD(
-	id AnimationId,
+	id AnimationID,
 	indexes ...RectIndex,
 ) AnimationDefine {
 	return AnimationDefine{

camera.go

@@ -3,7 +3,7 @@ package gg
 import "surdeus.su/core/gg/mx"
 
 // The type describes what
-// a camera object must implement.
+// a window camera object must implement.
 type Camera interface {
 	// Get the matrice to apply
 	// camera's features.
@@ -15,5 +15,7 @@ type Camera interface {
 	// The shaders to apply on
 	// everything on the camera.
 	GetShaderOptions() *ShaderOptions
+
+	GetAbsWinSize(Context) mx.Vector
 }
 

cmd/test/camera.go

@@ -0,0 +1,55 @@
+package main
+
+import "surdeus.su/core/gg/ox"
+import "surdeus.su/core/gg/mx"
+import "surdeus.su/core/gg"
+
+var (
+	camera  = &Camera{
+		Camera: ox.NewCamera(),
+		ScaleSpeed: 5.,
+		RotationSpeed: .3,
+	}
+)
+
+type Camera struct {
+	ox.ObjectImpl
+	ox.Camera
+	ScaleSpeed mx.Float
+	RotationSpeed mx.Float
+}
+
+func (cam *Camera) OnUpdate(c gg.Context) {
+	dt := c.Engine().DT().Seconds()
+	mov := c.Events().Mouse.Move
+	wheel := c.Events().Mouse.WheelChange
+	shiftPressed := c.Engine().IsPressed(gg.KeyShift)
+	d := float64(1.)
+	if shiftPressed {
+		d *= -1
+	}
+
+	// Moving.
+	if mov != nil && c.Engine().IsButtoned(
+			gg.MouseButtonRight,
+	) {
+		cam.Move(mov.AbsDelta)
+	}
+
+	// Scale.
+	if wheel != nil {
+		cam.AddScale(mx.V2(
+			wheel.Offset.Y * dt * cam.ScaleSpeed * 40,
+		))
+	}
+
+	// Scale and rotation.
+	for _, key := range c.Engine().GetKeyboardKeys() {
+		switch key {
+		case gg.KeyF:
+			cam.AddScale(mx.V2(d*cam.ScaleSpeed * dt))
+		case gg.KeyR:
+			cam.Rotate(d*mx.Pi * cam.ScaleSpeed * dt)
+		}
+	}
+}

cmd/test/debug.go

@@ -1,6 +1,8 @@
 package main
 
 import "surdeus.su/core/gg"
+import "surdeus.su/core/gg/ox"
+import "surdeus.su/core/gg/mx"
 
 import (
 	"strings"
@@ -8,24 +10,24 @@ import (
 )
 
 type Debug struct {
-	gg.Object
-	gg.Visibility
+	ox.ObjectImpl
+	ox.Visibility
 }
 
-func (d *Debug) Update(c *Context) {
-	for _, e := range c.Events {
-		switch ec := e.(type) {
-		case *gg.KeyDown:
-			switch ec.Key {
+func (d *Debug) OnUpdate(c Context) {
+	for _, key := range c.Events().Keyboard.KeyDowns {
+		switch key.Key {
 		case gg.KeyF11:
-				d.Visible = !d.Visible
-			}
+			d.ToggleVisibility()
+			//d.Visible = !d.IsVisible()
 		}
 	}
 }
 
-func (d *Debug) Draw(c *Context) []gg.EVertex {
-	e := c.Engine
+func (d *Debug) GetLayer() gg.Layer {return LayerHighest}
+
+func (d *Debug) Draw(c Context) *gg.Drawing {
+	e := c.Engine()
 	relTri := tri.Rel()
 	relPlayer := player.Rel()
 
@@ -34,36 +36,36 @@ func (d *Debug) Draw(c *Context) []gg.EVertex {
 		"counter: %d", counter,
 	))
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"tps: %d", int(c.Tps()),
+		"tps: %d", int(c.Engine().TPS()),
 	))
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"fps: %d", int(c.Fps()),
+		"fps: %d", int(c.Engine().FPS()),
 	))
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"dframe: %d", int(c.Dframe()),
+		"dframe: %d", int(c.Engine().Dframe()),
 	))
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"frame: %d", int(c.Frame()),
+		"frame: %d", int(c.Engine().Frame()),
 	))
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"relPlayerPos: %v", relPlayer.Position(),
+		"relPlayerPos: %v", relPlayer.GetPosition(),
 	))
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"absPlayerPos: %v", player.Position(),
+		"absPlayerPos: %v", player.GetPosition(),
 	))
 
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"relTriPos: %v", relTri.Position(),
+		"relTriPos: %v", relTri.GetPosition(),
 	))
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"absTriPos: %v", tri.Position(),
+		"absTriPos: %v", tri.GetPosition(),
 	))
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"absTriRot: %v", gg.Degree(tri.Rotation()),
+		"absTriRot: %v", mx.Degree(tri.GetRotation()),
 	))
 
 	keys := []string{}
-	for _, k := range e.Keys() {
+	for _, k := range e.GetKeyboardKeys() {
 		keys = append(keys, k.String())
 	}
 	keyStrs = append(keyStrs, fmt.Sprintf(
@@ -71,10 +73,10 @@ func (d *Debug) Draw(c *Context) []gg.EVertex {
 	))
 
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"buttons: %v", c.MouseButtons(),
+		"buttons: %v", c.Engine().MouseButtons(),
 	))
 	keyStrs = append(keyStrs, fmt.Sprintf(
-		"wheel: %v", c.Wheel(),
+		"wheel: %v", c.Engine().Wheel(),
 	))
 	/*if rectMove.ContainsPoint(e.AbsCursorPosition()) {
 		keyStrs = append(keyStrs, "contains cursor")
@@ -87,14 +89,22 @@ func (d *Debug) Draw(c *Context) []gg.EVertex {
 
 	keyStrs = append(keyStrs, fmt.Sprintf(
 		"camera position: %v %v",
-		c.Camera.Position().X,
-		c.Camera.Position().Y,
+		camera.GetPosition().X,
+		camera.GetPosition().Y,
 	))
-	keyStrs = append(keyStrs, fmt.Sprintf("realCursorPos: %v", e.CursorPosition()))
-	keyStrs = append(keyStrs, fmt.Sprintf("absCursorPos: %v", e.AbsCursorPosition()))
-	keyStrs = append(keyStrs, fmt.Sprintf("absWinSize: %v", c.AbsWinSize()))
+	keyStrs = append(keyStrs, fmt.Sprintf(
+		"realCursorPos: %v", e.GetRealCursorPosition()))
+	keyStrs = append(keyStrs, fmt.Sprintf(
+		"absCursorPos: %v", e.GetAbsCursorPosition() ))
 
-	e.DebugPrint(c.Image,
+	keyStrs = append(keyStrs,
+		fmt.Sprintf(
+			"absWinSize: %v",
+			c.Engine().GetAbsWinSize(),
+		),
+	)
+
+	e.DebugPrint(c.Image(),
 		strings.Join(keyStrs, "\n"))
 
 	return nil

cmd/test/grid.go

@@ -0,0 +1,53 @@
+package main
+
+import "surdeus.su/core/gg"
+import "surdeus.su/core/gg/ox"
+import "surdeus.su/core/gg/mx"
+
+type Grid struct {
+	ox.ObjectImpl
+	ox.Sprite
+	Cage, Width mx.Float
+}
+
+func (grid *Grid) OnUpdate(c Context) {
+	//d := c.IsPressed(gg.KeyShift)
+	for _, down := range c.Events().Keyboard.KeyDowns {
+		switch down.Key {
+		case gg.Key9:
+			grid.Cage /= 10
+			grid.Width /= 5
+		case gg.Key0:
+			grid.Cage *= 10
+			grid.Width *= 5
+		}
+	}
+}
+
+func NewGrid() *Grid {
+	grid := &Grid{}
+	grid.Transform = ox.T()
+	grid.SetAround(mx.V2(0))
+	grid.Layer = LayerBackground
+	grid.Images[0] = gg.NewImage(720, 480)
+	grid.Images[0].Fill(gg.RGBA(1, 1, 1, 1))
+	grid.Shader = bgShader
+	grid.Uniforms = map[string]any{}
+	//bg.Floating = true
+	grid.Visible = true
+	grid.Floating = true
+	grid.Cage = 100
+	grid.Width = 5
+	return grid
+}
+
+func (grid *Grid) Draw(c Context) *gg.Drawing {
+	scale := camera.GetScale()
+	pos := camera.GetPosition()
+	grid.Uniforms["Zoom"] = mx.Float(scale.X)
+	grid.Uniforms["PosX"] = pos.X
+	grid.Uniforms["PosY"] = pos.Y
+	grid.Uniforms["Cage"] = grid.Cage
+	grid.Uniforms["Width"] = grid.Width
+	return grid.Sprite.Draw(c)
+}

cmd/test/main.go

@@ -3,8 +3,9 @@ package main
 import (
 	"surdeus.su/core/gg"
 	"surdeus.su/core/gg/ox"
+	//"surdeus.su/core/gg/mx"
+	"surdeus.su/core/gg/ax"
 	"github.com/hajimehoshi/ebiten/v2/examples/resources/images"
-	"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
 	//_ "github.com/silbinarywolf/preferdiscretegpu"
 	"bytes"
 	"log"
@@ -13,105 +14,32 @@ import (
 
 type Context = gg.Context
 
-type Grid struct {
-	ox.Sprite
-	Cage, Width gg.Float
-}
-
-func (grid *Grid) OnUpdate(c *Context) {
-	//d := c.IsPressed(gg.KeyShift)
-	for _, ev := range c.Events {
-		switch e := ev.(type) {
-		case *gg.KeyDown:
-			switch e.Key {
-			case gg.Key9:
-				grid.Cage /= 10
-				grid.Width /= 5
-			case gg.Key0:
-				grid.Cage *= 10
-				grid.Width *= 5
-			}
-		}
-	}
-}
-
-func (grid *Grid) OnDraw(c *Context) []gg.EVertex {
-	scale := c.Camera.Scale()
-	pos := c.Camera.Position()
-	grid.Uniforms["Zoom"] = gg.Float(scale.X)
-	grid.Uniforms["PosX"] = pos.X
-	grid.Uniforms["PosY"] = pos.Y
-	grid.Uniforms["Cage"] = grid.Cage
-	grid.Uniforms["Width"] = grid.Width
-	return grid.Sprite.Draw(c)
-}
-
 const (
-	HighestL gg.Layer = -iota
-	DebugL
-	TriangleL
-	PlayerL
-	RectL
-	BackgroundLayer
-	LowestL
+	LayerHighest gg.Layer = -iota
+
+	LayerDebug
+	LayerTriangle
+	LayerPlayer
+	LayerRect
+	LayerBackground
+
+	LayerLowest
 )
 
 const (
-	Stand gg.AnimationId = iota
+	Stand ax.AnimationID = iota
 	Walk
 )
 
+
 var (
-	playerAnimations gg.AnimationSet
+	playerAnimations ax.AnimationSet
 	playerImg        *gg.Image
 	player           *Player
-	rectMove         gg.Rectangle
+	rectMove         ox.Rectangle
 	rect             *Rect
 	tri              *Tri
-)
-
-func main() {
-	e := gg.NewEngine(&gg.WindowConfig{
-		Title:      "Test title",
-		Width:      720,
-		Height:     480,
-		VSync:      true,
-		Fullscreen: false,
-	})
-
-	var err error
-	playerImg, err = gg.LoadImage(bytes.NewReader(images.Runner_png))
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	rect = NewRect()
-
-	playerAnimations, _ = gg.AnimationSetFromImage(
-		playerImg,
-		8, 3,
-		10, 1,
-		gg.AD(Stand).DefRow(0, 0, 1, 2, 3, 4),
-		gg.AD(Walk).DefRow(1, 0, 1, 2, 3, 4, 5, 6, 7),
-	)
-	player = NewPlayer()
-	tri = NewTri()
-
-	e.Spawn(&Debug{})
-	e.Spawn(player)
-	e.Spawn(rect)
-	e.Spawn(tri)
-
-	/*circle := &gg.Circle{}
-	circle.Transform = gg.T()
-	circle.Rotation = 300
-	circle.Color = gg.Rgba(1, 1, 1, 1)
-	circle.Antialias = true
-	circle.Layer = HighestL
-	circle.Visible = true*/
-	//e.Spawn(circle)
-
-	bgShader := gg.MustNewShader([]byte(`
+	bgShader = gg.MustNewShader([]byte(`
 		package main
 
 		//kage:unit pixels
@@ -140,40 +68,58 @@ func main() {
 			return cx
 		}
 	`))
-	grid := &Grid{}
-	grid.Transform = gg.T()
-	grid.SetAround(gg.V2(0))
-	grid.Layer = BackgroundLayer
-	grid.Images[0] = gg.NewImage(720, 480)
-	grid.Images[0].Fill(gg.Rgba(1, 1, 1, 1))
-	grid.Shader = bgShader
-	grid.Uniforms = map[string]any{}
-	//bg.Floating = true
-	grid.Visible = true
-	grid.Floating = true
-	grid.Cage = 100
-	grid.Width = 5
-	e.Spawn(grid)
-
-	txt := &Text{}
-	txt.Transform = gg.T()
-	//txt.Position = gg.V2(400)
-	txt.Color = gg.Rgba(1, 1, 1, 1)
-	txt.Layer = HighestL
-	txt.Visible = true
-	txt.Data = "Hello, World!\nПривет, Мир!"
-	txt.Face, err = gg.MakeFaceFromTtf(
-		bytes.NewReader(fonts.MPlus1pRegular_ttf),
-		&gg.TtfFaceOptions{
-			Size:    32,
-			DPI:     72,
-			Hinting: gg.FontHintingNone,
-		},
 )
+
+func main() {
+	e := gg.NewEngine(gg.WindowConfig{
+		Title:      "Test title",
+		Width:      720,
+		Height:     480,
+		VSync:      true,
+		Fullscreen: false,
+	})
+	e.SetCamera(camera)
+	e.Spawn(camera)
+
+	var err error
+	playerImg, err = gg.LoadImage(bytes.NewReader(images.Runner_png))
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	rect = NewRect()
+
+	playerAnimations, _ = ax.AnimationSetFromImage(
+		playerImg,
+		8, 3,
+		10, 1,
+		ax.AD(Stand).DefRow(0, 0, 1, 2, 3, 4),
+		ax.AD(Walk).DefRow(1, 0, 1, 2, 3, 4, 5, 6, 7),
+	)
+	player = NewPlayer()
+	tri = NewTri()
+
+	e.Spawn(&Debug{})
+	e.Spawn(player)
+	e.Spawn(rect)
+	e.Spawn(tri)
+
+	/*circle := &gg.Circle{}
+	circle.Transform = gg.T()
+	circle.Rotation = 300
+	circle.Color = gg.Rgba(1, 1, 1, 1)
+	circle.Antialias = true
+	circle.Layer = HighestL
+	circle.Visible = true*/
+	//e.Spawn(circle)
+
+	e.Spawn(NewGrid())
+
+	text, err := NewText()
 	if err != nil {
 		panic(err)
 	}
-	e.Spawn(txt)
+	e.Spawn(text)
 
 	//fmt.Println(rect.GetLayer(), player.GetLayer())
 	fmt.Println("Starting...")

cmd/test/player.go

@@ -1,33 +1,36 @@
 package main
 
-import (
-	//"math/rand"
-	"fmt"
-	"time"
-)
-
 import "surdeus.su/core/gg"
+import "surdeus.su/core/gg/ox"
+import "surdeus.su/core/gg/mx"
+import "time"
+import "log"
 
 type Player struct {
-	gg.AnimatedSprite
-	MoveSpeed  gg.Float
-	ScaleSpeed gg.Float
+	ox.AnimatedSprite
+	MoveSpeed  mx.Float
+	ScaleSpeed mx.Float
 	Spawned    bool
 }
 
 func NewPlayer() *Player {
 	ret := &Player{}
-	ret.Transform = gg.T()
-	ret.SetScale(gg.V2(1))
-	ret.SetAround(gg.V2(.5))
+	//ret.Transform = ox.T()
+	ret.AnimatedSprite = ox.NewAnimatedSprite(
+		playerAnimations,
+		time.Second / 1,
+	)
+
+
+	ret.SetScale(mx.V2(1))
+	ret.SetAround(mx.V2(.5))
+
 	ret.MoveSpeed = 40.
 	ret.ScaleSpeed = .2
-	ret.Animations = playerAnimations
-	ret.TimeBetweenFrames = time.Second / 10
 	ret.Shader = gg.SolidWhiteColorShader
 
 	ret.Visible = true
-	ret.Layer = PlayerL
+	ret.Layer = LayerPlayer
 
 	//ret.Collidable = true
 	//ret.Resolvable = true
@@ -35,20 +38,28 @@ func NewPlayer() *Player {
 	return ret
 }
 
-func (p *Player) Start(c *Context) {
+func (p *Player) OnStart(c Context) {
 	p.Connect(rect)
 }
 
-func (p *Player) Draw(c *Context) []gg.EVertex {
+func (p *Player) Draw(c Context) *gg.Drawing {
 	return p.AnimatedSprite.Draw(c)
-	prect := &gg.DrawableRectangle{
-		Rectangle: p.Rectangle(),
+	prect := &ox.DrawableRectangle{
+		Rectangle: p.GetRectangle(),
 	}
-	prect.Color = gg.Rgba(1, 1, 1, 1)
+	prect.Color = gg.RGBA(1, 1, 1, 1)
 	return prect.Draw(c)
 }
 
-func (p *Player) Update(c *Context) {
+func (p *Player) OnUpdate(c Context) {
+	log.Println(p.IsVisible())
+	if p.Spawned {
+		return
+	}
+	e := c.Engine()
+	dt := e.DT().Seconds()
+	//cam := c.Camera
+	keys := e.GetKeyboardKeys()
 	/*r := gg.Rectangle{
 		Transform: gg.T(),
 	}
@@ -57,76 +68,52 @@ func (p *Player) Update(c *Context) {
 	col, _ := gg.Collide(p, r)
 	fmt.Println(col.Crosses)*/
 	//p.SetPosition(p.Position().Sub(gg.Y(2)))
-	p.Move(gg.Y(1))
-	if p.Spawned {
-		return
-	}
-	dt := c.Dt().Seconds()
-	cam := c.Camera
-	keys := c.Keys()
+	//p.Move(gg.Y(1))
 
 	walking := false
-	shift := c.IsPressed(gg.KeyShift)
+	shiftPressed := e.IsPressed(gg.KeyShift)
+	d := float64(1)
+	if shiftPressed {
+		d *= -1
+	}
+
 	//p.Uniforms["Random"] = any(rand.Float32())
-	for _, v := range keys {
-		switch v {
+	for _, key := range keys {
+		switch key {
 		case gg.KeyQ:
-			p.SetScale(
-				p.Scale().Add(
-					gg.X(p.ScaleSpeed * dt),
-				),
-			)
+			p.AddScale(mx.VX(d*p.ScaleSpeed * dt))
 		case gg.KeyW:
-			p.Move(gg.Y(-p.MoveSpeed * dt))
+			p.Move(mx.VY(-p.MoveSpeed * dt))
 			walking = true
 			p.Animate(Walk)
 		case gg.KeyA:
-			p.Move(gg.X(-p.MoveSpeed * dt))
-			p.SetScale(gg.V(-1, 1))
+			p.Move(mx.VX(-p.MoveSpeed * dt))
+
+			p.SetScale(mx.V(-1, 1))
 			walking = true
 			p.Animate(Walk)
 		case gg.KeyS:
-			p.Move(gg.Y(p.MoveSpeed * dt))
+			p.Move(mx.VY(p.MoveSpeed * dt))
 			//p.Position.Y -= p.MoveSpeed * dt
 			walking = true
 			p.Animate(Walk)
 		case gg.KeyD:
-			p.Move(gg.X(p.MoveSpeed * dt))
-			p.SetScale(gg.V(1, 1))
+			p.Move(mx.VX(p.MoveSpeed * dt))
+			p.SetScale(mx.V(1, 1))
 			walking = true
 			p.Animate(Walk)
-		case gg.KeyR:
-			cam.Rotate(gg.Pi * p.ScaleSpeed * dt)
-		case gg.KeyT:
-			cam.Rotate(-gg.Pi * p.ScaleSpeed * dt)
-		case gg.KeyRightBracket:
-			if shift {
-				p.Rotate(-gg.Pi * 0.3 * dt)
-			} else {
-				p.Rotate(+gg.Pi * 0.3 * dt)
-			}
-		case gg.KeyF:
-			if shift {
-				cam.AddScale(gg.V2(p.ScaleSpeed * dt))
-			} else {
-				cam.AddScale(gg.V2(-p.ScaleSpeed * dt))
-			}
-		case gg.KeyLeftBracket:
-			if shift {
-				rect.Rotate(-gg.Pi * 0.3 * dt)
-			} else {
-				rect.Rotate(+gg.Pi * 0.3 * dt)
-			}
-		case gg.Key0:
-			c.Del(p)
-		case gg.KeyB:
-		case gg.Key5:
+
+		case gg.KeyE :
+			p.Rotate(d*mx.Pi * 0.3 * dt)
+		case gg.KeyX:
+			c.Engine().Delete(p)
+		case gg.KeyC:
 			pp := *p
 			counter++
 			pp.Spawned = true
-			pp.Collidable = false
-			pp.Resolvable = false
-			c.Spawn(&pp)
+			//pp.Collidable = false
+			//pp.Resolvable = false
+			c.Engine().Spawn(&pp)
 		}
 	}
 
@@ -134,38 +121,26 @@ func (p *Player) Update(c *Context) {
 		p.Animate(Stand)
 	}
 
-	for _, event := range c.Events {
-		switch ec := event.(type) {
-		case *gg.KeyDown:
+	for _, down := range c.Events().Keyboard.KeyDowns {
 		switch {
-			case ec.Key == gg.KeyB:
-				if p.Layer != PlayerL {
-					p.Layer = PlayerL
+		case down.Key == gg.KeyZ:
+			if p.Layer != LayerPlayer {
+				p.Layer = LayerPlayer
 			} else {
-					p.Layer = HighestL
+				p.Layer = LayerHighest
 			}
 		}
-		case *gg.MouseMove:
-			if !c.IsButtoned(gg.MouseButtonRight) {
-				break
-			}
-			c.Camera.Move(ec.Abs)
-		case *gg.WheelChange:
-			c.Camera.AddScale(gg.V2(
-				ec.Offset.Y * dt * p.ScaleSpeed * 40,
-			))
-		}
 	}
 
 }
 
-func (p *Player) GetCollisionInterest() []gg.CollisionType {
+/*func (p *Player) GetCollisionInterest() []gg.CollisionType {
 	return []gg.CollisionType{
 		gg.CollisionStaticPhysics,
 	}
-}
+}*/
 
-func (p *Player) Resolve(c *Context) {
+/*func (p *Player) Resolve(c *Context) {
 	col := c.Collisions[0]
 	if !p.Spawned && false {
 		fmt.Printf(
@@ -186,4 +161,4 @@ func (p *Player) Resolve(c *Context) {
 			}
 		}
 	}
-}
+}*/

cmd/test/rect.go

@@ -1,21 +1,19 @@
 package main
 
 import "surdeus.su/core/gg"
+import "surdeus.su/core/gg/ox"
+import "surdeus.su/core/gg/mx"
 
 type Rect struct {
-	gg.DrawableRectangle
+	ox.ObjectImpl
+	ox.DrawableRectangle
 }
 
 func NewRect() *Rect {
 	ret := &Rect{}
-	ret.SetScale(gg.V(5, 5))
-	ret.Color = gg.Color{
-		gg.MaxColorV,
-		0,
-		0,
-		gg.MaxColorV,
-	}
-	ret.Layer = RectL
+	ret.SetScale(mx.V(5, 5))
+	ret.Color = gg.RGBA(1, 0, 0, 1)
+	ret.Layer = LayerRect
 	ret.Visible = true
 	//ret.Collidable = true
 	ret.Width = 100
@@ -24,27 +22,33 @@ func NewRect() *Rect {
 	return ret
 }
 
-func (r *Rect) CollisionType() gg.CollisionType {
-	return gg.CollisionStaticPhysics
-}
-
-func (r *Rect) Update(c *Context) {
+func (r *Rect) OnUpdate(c Context) {
 	//r.R += 0.3 * e.DT()
-	dt := c.Dt().Seconds()
+	e := c.Engine()
+	dt := e.DT().Seconds()
+	shiftPressed := e.IsPressed(gg.KeyShift)
+	d := float64(1)
+	if shiftPressed {
+		d *= -1
+	}
 	//r.Position = c.AbsCursorPosition()
-	for _, v := range c.Keys() {
+	for _, v := range e.GetKeyboardKeys() {
 		switch v {
 		case gg.KeyArrowUp:
-			r.Move(gg.Y(-10 * dt))
+			r.Move(mx.VY(-10 * dt))
 		case gg.KeyArrowDown:
-			r.Move(gg.Y(10 * dt))
+			r.Move(mx.VY(10 * dt))
 		case gg.KeyArrowLeft:
-			r.Move(gg.X(-10 * dt))
+			r.Move(mx.VX(-10 * dt))
 		case gg.KeyArrowRight:
-			r.Move(gg.X(10 * dt))
+			r.Move(mx.VX(10 * dt))
+		case gg.KeyLeftBracket:
+			r.Rotate(d*mx.Pi * 0.3 * dt)
 		}
 	}
 }
 
-func (r *Rect) Event(c *Context) {
-}
+/*func (r *Rect) CollisionType() gg.CollisionType {
+	return gg.CollisionStaticPhysics
+}*/
+

cmd/test/text.go

@@ -2,26 +2,40 @@ package main
 
 import (
 	"surdeus.su/core/gg"
+	"surdeus.su/core/gg/ox"
+	"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
+	"bytes"
 	//"fmt"
 )
 
-type Objecter interface {
-}
-
-type Wrap[V Objecter] struct {
-	O V
-}
-
-//func (w *Wrap)
-
-type Context2 struct {
-	*gg.Context
-}
-
 type Text struct {
-	gg.Text
+	ox.ObjectImpl
+	ox.Text
 }
 
-func (txt *Text) Update(c *Context) {
+func NewText() (*Text, error) {
+	txt := &Text{}
+	txt.Transform = ox.T()
+	//txt.Position = gg.V2(400)
+	txt.Color = gg.RGBA(1, 1, 1, 1)
+	txt.Layer = LayerHighest
+	txt.Visible = true
+	txt.Data = "Hello, World!\nПривет, Мир!"
+	var err error
+	txt.Face, err = gg.MakeFaceFromTTF(
+		bytes.NewReader(fonts.MPlus1pRegular_ttf),
+		&gg.FaceOptionsTTF{
+			Size:    32,
+			DPI:     72,
+			Hinting: gg.FontHintingNone,
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+	return txt, nil
+}
+
+func (txt *Text) Update(c *gg.Context) {
 	//txt.Data += string(c.Runes())
 }

cmd/test/trianlge.go

@@ -1,39 +1,42 @@
 package main
 
 import "surdeus.su/core/gg"
-import "fmt"
+import "surdeus.su/core/gg/ox"
+import "surdeus.su/core/gg/mx"
+//import "fmt"
 
 var (
 	counter int
 )
 
 type Tri struct {
-	gg.DrawablePolygon
+	ox.ObjectImpl
+	ox.DrawablePolygon
 	Spawned bool
 }
 
 func NewTri() *Tri {
 	ret := &Tri{}
-	ret.Transform = gg.T()
-	ret.SetPosition(gg.V(-100, -100))
-	ret.Triangles = gg.Triangles{
-		gg.Triangle{
-			gg.V(0, 10),
-			gg.V(100, 0),
-			gg.V(0, -10),
+	ret.Transform = ox.T()
+	ret.SetPosition(mx.V2(-100))
+	ret.Triangles = mx.Triangles{
+		mx.Triangle{
+			mx.V(0, 10),
+			mx.V(100, 0),
+			mx.V(0, -10),
 		},
 	}
-	ret.Color = gg.Rgba(1, 1, 0, 1)
+	ret.Color = gg.RGBA(1, 1, 0, 1)
 	ret.Visible = true
 	//ret.Collidable = true
-	ret.Type = gg.CollisionStaticPhysics
-	ret.Layer = TriangleL
+	//ret.Type = gg.CollisionStaticPhysics
+	ret.Layer = LayerTriangle
 	//ret.Connect(player)
 
 	return ret
 }
 
-func (t *Tri) Update(c *Context) {
+func (t *Tri) OnUpdate(c Context) {
 	//redges := rect.Edges()
 	//tedges := t.Edges()
 	//crosses, ok := tedges.CrossWithEdges(redges)
@@ -42,24 +45,25 @@ func (t *Tri) Update(c *Context) {
 	if false {
 		//fmt.Println("edges:", tedges)
 	}
-	col, hasCol := gg.Collide(t, rect)
+	/*col, hasCol := gg.Collide(t, rect)
 	if hasCol && len(col.Crosses) > 0 {
 		fmt.Println("col:", col)
-	}
-	dt := c.Dt().Seconds()
-	if !t.ContainedPoints(gg.Points{c.AbsCursorPosition()}).Empty() {
+	}*/
+	e := c.Engine()
+	dt := e.DT().Seconds()
+	/*if !t.ContainedPoints(gg.Points{c.AbsCursorPosition()}).Empty() {
 		t.Color = gg.Rgba(0, 1, 0, 1)
 	} else {
 		t.Color = gg.Rgba(1, 0, 1, 1)
-	}
+	}*/
 	if t.Spawned {
 		return
 	}
 
-	keys := c.Keys()
+	keys := e.GetKeyboardKeys()
 
 	d := +1.
-	if c.IsPressed(gg.KeyShift) {
+	if e.IsPressed(gg.KeyShift) {
 		d = -1
 	}
 
@@ -67,21 +71,21 @@ func (t *Tri) Update(c *Context) {
 		switch key {
 
 		case gg.KeyM:
-			t.Move(gg.Y(100 * dt * d))
+			t.Move(mx.VY(100 * dt * d))
 		case gg.KeyN:
-			t.Move(gg.X(100 * dt * d))
+			t.Move(mx.VX(100 * dt * d))
 
 		case gg.KeyV:
-			t.Rotate(d * gg.Pi * 0.3 * dt)
+			t.Rotate(d * mx.Pi * 0.3 * dt)
 		case gg.Key2:
 			if t.Spawned {
 				break
 			}
-			t.Triangles = append(t.Triangles, gg.Triangle{
-				gg.V(0, 10+gg.Float(counter)),
-				gg.V(100+gg.Float(counter), 0),
+			/*t.Triangles = append(t.Triangles, gg.Triangle{
+				gg.V(0, 10+ mx.Float(counter)),
+				gg.V(100+ mx.Float(counter), 0),
 				gg.V(0, -10-gg.Float(counter)),
-			})
+			})*/
 		case gg.Key3:
 			if t.Spawned {
 				break
@@ -89,18 +93,16 @@ func (t *Tri) Update(c *Context) {
 			tt := *t
 			tt.Spawned = true
 			tt.Disconnect()
-			if c.Spawn(&tt) == nil {
+			if e.Spawn(&tt) == nil {
 				counter++
 			}
 		}
 	}
 
-	for _, event := range c.Events {
-		switch e := event.(type) {
-		case *gg.KeyDown:
-			switch e.Key {
+	for _, down := range c.Events().Keyboard.KeyDowns {
+		switch down.Key {
 		case gg.Key1:
-				if t.Connected() {
+			if t.IsConnected() {
 				t.Disconnect()
 			} else {
 				t.Connect(player)
@@ -108,4 +110,3 @@ func (t *Tri) Update(c *Context) {
 		}
 	}
 }
-}

collider.go

@@ -1,2 +0,0 @@
-package gg
-

context.go

@@ -1,8 +1,35 @@
 package gg
 
+// The type is used to provide
+// custom behaviour for drawing and updating etc.
 type Context struct {
-	Events []any
-	*Engine
-	*Image
+	events Events
+	engine *Engine
+	image *Image
+}
+
+// Get the current engine.
+func (c Context) Engine() *Engine {
+	return c.engine
+}
+
+func (c Context) Camera() Camera {
+	if c.engine == nil {
+		return nil
+	}
+	return c.engine.camera
+}
+
+// Get the image to draw to.
+// Can be accessed only in the
+// Draw(...) call.
+func (c Context) Image() *Image {
+	return c.image
+}
+
+// Get the events.
+// Available only in the Update(...) call.
+func (c Context) Events() Events {
+	return c.events
 }
 

draw.go

@@ -1,14 +1,14 @@
 package gg
 
 type Drawing struct {
-	EVertices []EVertice
+	Vertices []Vertice
 }
 
 // The interface describes anything that can be
 // drawn. It will be drew corresponding to
 // the layers order so the layer must be returned.
 type Drawer interface {
-	Draw(Context) Drawing
+	Draw(Context) *Drawing
 	GetLayer() Layer
 	IsVisible() bool
 }

engine.go

@@ -17,13 +17,6 @@ const (
 type GraphicsLibrary = ebiten.GraphicsLibrary
 type RunOptions = ebiten.RunGameOptions
 
-// The type represents order of drawing.
-// Higher values are drawn later.
-type Layer float64
-
-func (l Layer) GetLayer() Layer {
-	return l
-}
 
 // Window configuration type.
 type WindowConfig struct {
@@ -60,7 +53,7 @@ type Engine struct {
 
 	// The main camera to display in window.
 	// If is set to nil then the engine will panic.
-	Camera Camera
+	camera Camera
 
 	drawLastTime time.Time
 	drawdt Duration
@@ -92,7 +85,7 @@ type Engine struct {
 type engine Engine
 
 // Get currently pressed keys.
-func (e *Engine) Keys() []Key {
+func (e *Engine) GetKeyboardKeys() []Key {
 	return e.keys
 }
 
@@ -119,7 +112,6 @@ func NewEngine(
 	ret := &Engine{}
 
 	ret.wcfg = cfg
-	ret.Camera = ret.NewCamera()
 	ret.outerEvents = make(EventChan)
 	ret.handleEvents = make(EventChan)
 	ret.Objects = &Objects{}
@@ -127,24 +119,16 @@ func NewEngine(
 	return ret
 }
 
-// Get the real window size in the current context.
-func (c *Engine) RealWinSize() mx.Vector {
-	var w, h int
-	if c.wcfg.Fullscreen {
-		w, h = ebiten.ScreenSizeInFullscreen()
-	} else {
-		w, h = c.wcfg.Width, c.wcfg.Height
-	}
-	return mx.Vector{
-		mx.Float(w),
-		mx.Float(h),
-	}
+func (e *Engine) Camera() Camera {
+	return e.camera
 }
 
-func (c *Engine) AbsWinSize() mx.Vector {
-	return c.RealWinSize().Div(c.Camera.GetScale())
+func (e *Engine) SetCamera(c Camera) *Engine {
+	e.camera = c
+	return e
 }
 
+
 func (e *Engine) EventInput() EventChan {
 	return e.outerEvents
 }
@@ -156,7 +140,7 @@ func (e *Engine) Spawn(o Object) error {
 	}*/
 
 	o.OnStart(Context{
-		Engine: e,
+		engine: e,
 	})
 	e.Objects.store = append(e.Objects.store, o)
 
@@ -186,7 +170,7 @@ var (
 )
 
 func (e *Engine) IsPressed(k Key) bool {
-	keys := e.Keys()
+	keys := e.GetKeyboardKeys()
 	for _, v := range keys {
 		if v == k {
 			return true
@@ -210,77 +194,121 @@ func (e *Engine) cursorPosition() mx.Vector {
 	return mx.Vector{mx.Float(x), mx.Float(y)}
 }
 
-func (e *Engine) CursorPosition() mx.Vector {
+// Get the real cursor position.
+func (e *Engine) GetRealCursorPosition() mx.Vector {
 	return e.cursorPos
 }
 
-func (e *Engine) AbsCursorPosition() mx.Vector {
-	return e.CursorPosition().Apply(e.Camera.GetAbsMatrice())
+// Get the absolute cursor position in the world
+// of the engine.
+func (e *Engine) GetAbsCursorPosition(
+) mx.Vector {
+	return e.GetRealCursorPosition().
+		Apply(e.camera.GetAbsMatrice(Context{
+			engine: e,
+		}))
 }
 
+// Get the real window size in the current context.
+func (e *Engine) GetRealWinSize() mx.Vector {
+	var w, h int
+	if e.wcfg.Fullscreen {
+		w, h = ebiten.ScreenSizeInFullscreen()
+	} else {
+		w, h = e.wcfg.Width, e.wcfg.Height
+	}
+	return mx.Vector{
+		mx.Float(w),
+		mx.Float(h),
+	}
+}
+
+func (e *Engine) GetAbsWinSize() mx.Vector {
+	return e.camera.GetAbsWinSize(Context{
+		engine: e,
+	})
+}
 func (e *Engine) Runes() []rune {
 	return e.runes
 }
 
-func (e *engine) updateEvents() []any {
+func (e *engine) updateEvents() Events {
 
 	eng := (*Engine)(e)
 	e.prevKeys = e.keys
 	e.keys = inpututil.
 		AppendPressedKeys(e.keys[:0])
 
-	events := []any{}
+	events := Events{}
+
+	// Mouse buttons.
 	btns := e.buttons
 	for _, btn := range allButtons {
 		if inpututil.IsMouseButtonJustPressed(btn) {
 			btns[btn] = struct{}{}
-			events = append(events, &MouseButtonDown{
+			events.Mouse.ButtonDowns = append(
+				events.Mouse.ButtonDowns,
+				MouseButtonDown{
 					MouseButton: btn,
-			})
+				},
+			)
 		} else if inpututil.IsMouseButtonJustReleased(btn) {
 			delete(btns, btn)
-			events = append(events, &MouseButtonUp{
+			events.Mouse.ButtonUps = append(
+				events.Mouse.ButtonUps,
+				MouseButtonUp{
 					MouseButton: btn,
-			})
+				},
+			)
 		}
 	}
 
+	// Mouse wheel.
 	x, y := ebiten.Wheel()
 	e.wheel = mx.Vector{x, y}
 	if !(e.wheel.Eq(mx.ZV)) {
-		events = append(events, &WheelChange{
+		events.Mouse.WheelChange = &WheelChange{
 			Offset: e.wheel,
-		})
-	}
-
-	keyDiff := diffEm(e.prevKeys, e.keys)
-	for _, key := range keyDiff {
-		var event any
-		if eng.IsPressed(key) {
-			event = &KeyDown{
-				Key: key,
-			}
-		} else {
-			event = &KeyUp{
-				Key: key,
-			}
-		}
-		events = append(events, event)
+		}
 	}
 
+	// Cursor position.
 	realPos := eng.cursorPosition()
 	if !realPos.Eq(e.cursorPos) {
-		absM := eng.Camera.GetAbsMatrice()
+		absM := eng.camera.GetAbsMatrice(Context{
+			engine: eng,
+		})
 
 		absPrevPos := e.cursorPos.Apply(absM)
 		absPos := realPos.Apply(absM)
 
-		events = append(events, &MouseMove{
+		events.Mouse.Move = &MouseMove{
 			RealDelta: realPos.Sub(e.cursorPos),
 			AbsDelta: absPos.Sub(absPrevPos),
-		})
+		}
 		e.cursorPos = realPos
 	}
+
+	// Keyboard.
+	keyDiff := diffEm(e.prevKeys, e.keys)
+	for _, key := range keyDiff {
+		if eng.IsPressed(key) {
+			events.Keyboard.KeyDowns = append(
+				events.Keyboard.KeyDowns,
+				KeyDown{
+					Key: key,
+				},
+			)
+		} else {
+			events.Keyboard.KeyUps = append(
+				events.Keyboard.KeyUps,
+				KeyUp{
+					Key: key,
+				},
+			)
+		}
+	}
+
 	return events
 }
 
@@ -298,8 +326,8 @@ func (e *engine) Update() error {
 
 	events := e.updateEvents()
 	c := Context{
-		Engine: eng,
-		Events: events,
+		engine: eng,
+		events: events,
 	}
 	for _, object := range e.Objects.store {
 		object.OnUpdate(c)
@@ -350,16 +378,16 @@ func (e *engine) Draw(img *ebiten.Image) {
 	// First drawing via the inside function
 	// and then the returned []EVertex.
 	layers := maps.NewSparse[Layer, []Drawer](nil, m)
-	c := Context{Engine: eng, Image: img}
+	c := Context{engine: eng, image: img}
 	for layer := range layers.Chan() {
 
-		vertices := []EVertice{}
+		vertices := Vertices{}
 		for _, drawer := range layer {
 			drawing := drawer.Draw(c)
-			if drawing.EVertices != nil {
+			if drawing != nil {
 				vertices = append(
 					vertices,
-					drawing.EVertices...,
+					drawing.Vertices...,
 				)
 			}
 		}
@@ -369,7 +397,7 @@ func (e *engine) Draw(img *ebiten.Image) {
 		for i := 0 ; i<pn ; i++ {
 			cur := i*MaxVertices
 			img.DrawTriangles(
-				vertices[cur:cur+MaxVertices],
+				vertices[cur:cur+MaxVertices].ToAPI(),
 				fullPageIndexes[:],
 				defaultPageImg,
 				defaultTriOptions,
@@ -378,7 +406,7 @@ func (e *engine) Draw(img *ebiten.Image) {
 
 		st := pn*MaxVertices
 		img.DrawTriangles(
-			vertices[st:],
+			vertices[st:].ToAPI(),
 			fullPageIndexes[:mod],
 			defaultPageImg,
 			defaultTriOptions,
@@ -387,7 +415,6 @@ func (e *engine) Draw(img *ebiten.Image) {
 
 
 	// Empty the buff to generate it again.
-	eng.Camera.buffered = false
 	e.drawLastTime = time.Now()
 	e.dframe++
 }
@@ -453,3 +480,6 @@ func (e *Engine) Run() error {
 	return ebiten.RunGameWithOptions((*engine)(e), e.wcfg.Options)
 }
 
+func (e *Engine) GetWindowConfig() WindowConfig {
+	return e.wcfg
+}

event.go

@@ -67,5 +67,22 @@ type WheelChange struct {
 	Offset mx.Vector
 }
 
+type KeyboardEvents struct {
+	KeyDowns []KeyDown
+	KeyUps []KeyUp
+}
+
+type MouseEvents struct {
+	ButtonDowns []MouseButtonDown
+	ButtonUps []MouseButtonUp
+	Move *MouseMove
+	WheelChange *WheelChange
+}
+
+type Events struct {
+	Keyboard KeyboardEvents
+	Mouse MouseEvents
+}
+
 type EventChan chan any
 

layer.go

@@ -0,0 +1,9 @@
+package gg
+
+// The type represents order of drawing.
+// Higher values are drawn later.
+type Layer float64
+
+func (l Layer) GetLayer() Layer {
+	return l
+}

math.go

@@ -0,0 +1,8 @@
+package gg
+
+import (
+	//"surdeus.su/core/gg/mx"
+)
+
+//type Float = mx.Float
+

mx/math.go

@@ -11,11 +11,11 @@ import (
 type Float = float64
 
 const (
-	MaxFloat = math.MaxFloat64
-	Pi = math.Pi
-	RadDegrees = 57.2958
+	MaxFloat Float = math.MaxFloat64
+	Pi Float = math.Pi
+	RadDegrees Float = 57.2958
 	//PiRad = Pi * Rad
-	EqualityThreshold = 1e-9
+	EqualityThreshold Float = 1e-9
 )
 
 func IsNan(v Float) bool {

mx/triangle.go

@@ -76,6 +76,15 @@ func (t Triangle) GetVertices() Vectors {
 
 type Triangles []Triangle
 
+func (ts Triangles) ContainsPoint(pt Vector) bool {
+	for _, t := range ts {
+		if t.ContainsPoint(pt) {
+			return true
+		}
+	}
+	return false
+}
+
 func (ts Triangles) GetContainedPoints(
 	pts Vectors,
 ) Vectors {

object.go

@@ -8,7 +8,7 @@ type Object interface {
 	OnStart(Context)
 	OnUpdate(Context)
 	OnDelete(Context)
-	GetTags() map[string]struct{}
+	GetTags() TagMap
 }
 
 

ox/asprite.go

@@ -1,14 +1,16 @@
 package ox
 
+//import "time"
 import "surdeus.su/core/gg"
 import "surdeus.su/core/gg/ax"
 
+var _ = gg.Drawer(&AnimatedSprite{})
 // The type implements animated sprites.
 type AnimatedSprite struct {
 	Sprite
 
 	animations ax.AnimationSet
-	animationId ax.AnimationId
+	animationId ax.AnimationID
 
 	currentFrame int
 
@@ -19,36 +21,40 @@ type AnimatedSprite struct {
 }
 
 func NewAnimatedSprite(
-) *AnimatedSprite {
-	ret := &AnimatedSprite{}
+	animations ax.AnimationSet,
+	timeBetweenFrames gg.Duration,
+) AnimatedSprite {
+	ret := AnimatedSprite{}
+	ret.animations = animations
+	ret.timeBetweenFrames = timeBetweenFrames
 	return ret
 }
 
 // Change current animation to the specified one.
-func (as *AnimatedSprite) Animate(id ax.AnimationId) bool {
-	if as.AnimationId == id {
+func (as *AnimatedSprite) Animate(id ax.AnimationID) bool {
+	if as.animationId == id {
 		return true
 	}
-	_, ok := as.Animations[id]
+	_, ok := as.animations[id]
 	if ok {
 		as.duration = 0
-		as.AnimationId = id
+		as.animationId = id
 	}
 	return ok
 }
 
-func (as *AnimatedSprite) Draw(c Context) []EVertex {
-	as.duration += c.DrawDT()
+func (as *AnimatedSprite) Draw(c gg.Context) *gg.Drawing {
+	as.duration += c.Engine().DrawDT()
 
-	frames := as.Animations[as.AnimationId]
-	fullTime := Duration(len(frames)) * as.TimeBetweenFrames
+	frames := as.animations[as.animationId]
+	fullTime := gg.Duration(len(frames)) * as.timeBetweenFrames
 	if as.duration > fullTime {
 		as.duration -= fullTime
 	}
 
 	as.Images[0] = frames[
-		(as.duration/as.TimeBetweenFrames) %
-			Duration(len(frames)),
+		(as.duration/as.timeBetweenFrames) %
+			gg.Duration(len(frames)),
 	]
 
 	return as.Sprite.Draw(c)

ox/camera.go

@@ -5,9 +5,8 @@ import "surdeus.su/core/gg/mx"
 
 
 // Default camera implementation.
+var _ = gg.Camera(&Camera{})
 type Camera struct {
-	ObjectImpl
-
 	// The Transform to interact with
 	// to change camera position, rotation etc.
 	Transform
@@ -18,13 +17,13 @@ type Camera struct {
 
 	// The bufferization implementation
 	// to keep everything fast.
-	absMatrice realMatrice
+	absMatrice, realMatrice mx.Matrice
 }
 
 // Returns the new camera
 // with default settings.
-func NewCamera() *Camera {
-	ret := &Camera{}
+func NewCamera() Camera {
+	ret := Camera{}
 	ret.Transform = T()
 	return ret
 }
@@ -37,7 +36,7 @@ func (c *Camera) GetRealMatrice(ctx gg.Context) mx.Matrice {
 	// Bufferization
 	// so we do not need to recalculate
 	// Transform again.
-	if !c.Transform.Dirty() {
+	if !c.Transform.IsDirty() {
 		return c.realMatrice
 	}
 
@@ -50,7 +49,7 @@ func (c *Camera) GetRealMatrice(ctx gg.Context) mx.Matrice {
 	g.Translate(-position.X, -position.Y)
 	g.Rotate(rotation)
 
-	size := ctx.Engine.AbsWinSize()
+	size := ctx.Engine().GetAbsWinSize()
 	g.Translate(around.X * size.X, around.Y * size.Y)
 
 	g.Scale(scale.X, scale.Y)
@@ -63,14 +62,21 @@ func (c *Camera) GetRealMatrice(ctx gg.Context) mx.Matrice {
 // inside engine representation, 
 // get the position of cursor inside the world
 // basing on its window position.
-func (c *Camera) GetAbsMatrice(ctx gg.Context) mx.Matrice {
-	if !c.Transform.Dirty() {
-		return c.absMatrice
+func (camera *Camera) GetAbsMatrice(ctx gg.Context) mx.Matrice {
+	if !camera.Transform.IsDirty() {
+		return camera.absMatrice
 	}
-	m := c.GetRealMatrice(ctx)
+	m := camera.GetRealMatrice(ctx)
 	m.Invert()
 
-	c.absMatrice = m
+	camera.absMatrice = m
 	return m
 }
 
+func (camera *Camera) GetAbsWinSize(
+	ctx gg.Context,
+) mx.Vector {
+	return ctx.Engine().GetRealWinSize().
+		Div(camera.GetScale())
+}
+

ox/circle.go

@@ -5,27 +5,28 @@ import (
 )
 
 import "surdeus.su/core/gg"
+import "surdeus.su/core/gg/mx"
 
 type Circle struct {
 	ObjectImpl
-	gg.Transform
+	mx.Circle
 	Visibility
 	Colority
 	Antialiasity
-	Layer
-	Radius Float
+	gg.Layer
 }
 
-func (circle *Circle) Draw(c *Context) []EVertex {
-	rPos := circle.Position().Apply(c.Camera.RealMatrix())
+func (circle *Circle) Draw(c gg.Context) gg.Drawing {
+	center := circle.Center.
+		Apply(c.Camera().GetRealMatrice(c))
 	vector.DrawFilledCircle(
-		c.Image,
-		float32(rPos.X), float32(rPos.Y),
+		c.Image(),
+		float32(center.X), float32(center.Y),
 		float32(circle.Radius),
 		circle.Color,
 		circle.Antialias,
 	)
-	return nil
+	return gg.Drawing{}
 }
 
 

ox/feats.go

@@ -1,5 +1,15 @@
 package ox
 
+import "surdeus.su/core/gg"
+
+
+type Drawity struct {
+	Visibility
+	Colority
+	Shaderity
+	Floatity
+	Layerity
+}
 
 // Feat to emded for turning antialias on and off.
 type Antialiasity struct {
@@ -14,18 +24,32 @@ func (v Visibility) IsVisible() bool {
 	return v.Visible
 }
 
+func (v Visibility) ToggleVisibility() bool {
+	v.Visible = !v.Visible
+	return v.IsVisible()
+}
+
 // Feat to embed to make colorful objects.
 type Colority struct {
-	Color Color
+	Color gg.Color
 }
 
 // The structure to embed into shaderable
 // objects.
 type Shaderity struct {
-	ShaderOptions ShaderOptions
+	gg.ShaderOptions
 }
 
-func (s *Shaderity) GetShaderOptions(
-) *ShaderOptions {
+func (s Shaderity) GetShaderOptions(
+) *gg.ShaderOptions {
 	return &s.ShaderOptions
 }
+
+type Floatity struct {
+	Floating bool
+}
+func (s Floatity) IsFloating() bool {
+	return s.Floating
+}
+
+type Layerity = gg.Layer

ox/object.go

@@ -1,12 +1,25 @@
 package ox
 
+import "surdeus.su/core/gg"
+
+type DrawerImpl struct{}
+func (o DrawerImpl) Draw(c gg.Context) *gg.Drawing {
+	return nil
+}
+func (o DrawerImpl) GetLayer() gg.Layer {return 0}
+func (o DrawerImpl) IsVisible() bool {return false}
+
+type BeherImpl struct{}
+func (o BeherImpl) OnStart(c gg.Context) {}
+func (o BeherImpl) OnUpdate(c gg.Context) {}
+func (o BeherImpl) OnDelete(c gg.Context) {}
+func (o BeherImpl) GetTags() gg.TagMap {return nil}
+
 // The standard empty implementation
-// of the Object interface to embed.
-type ObjectImpl struct {}
-func (o ObjectImpl) OnStart(c Context) {}
-func (o ObjectImpl) OnUpdate(c Context) {}
-func (o ObjectImpl) OnDelete(c Context) {}
-func (o ObjectImpl) GetTags() map[string]struct{}{return nil}
-func (o ObjectImpl) Draw(c Context) {}
-func (o ObjectImpl) GetLayer() Layer {return 0}
-func (o ObjectImpl) IsVisible() bool {return false}
+// of the Object interface to embed
+// so you do not need to implement everything.
+var _ = gg.Object(ObjectImpl{})
+type ObjectImpl struct {
+	DrawerImpl
+	BeherImpl
+}

ox/polygon.go

@@ -12,15 +12,18 @@ type Polygon struct {
 	mx.Triangles
 }
 
-func (p Polygon) ContainedPoints(pts Points) (Points) {
-	return p.MakeTriangles().ContainedPoints(pts)
+func (p Polygon) GetContainedPoints(
+	pts mx.Vectors,
+) (mx.Vectors) {
+	return p.MakeTriangles().
+		GetContainedPoints(pts)
 }
 
-func (p Polygon) MakeTriangles() Triangles {
+func (p Polygon) MakeTriangles() mx.Triangles {
 	m := p.Transform.GetMatrice()
-	ret := make(Triangles, len(p.Triangles))
+	ret := make(mx.Triangles, len(p.Triangles))
 	for i, t := range p.Triangles {
-		ret[i] = Triangle{
+		ret[i] = mx.Triangle{
 			t[0].Apply(m),
 			t[1].Apply(m),
 			t[2].Apply(m),
@@ -38,21 +41,18 @@ func (p Polygon) GetEdges() mx.Lines {
 	return p.MakeTriangles().GetEdges()
 }
 
+var _ = gg.Drawer(&DrawablePolygon{})
 // Polygon that can be drawn.
 type DrawablePolygon struct {
 	Polygon
-	ShaderOptions
-	Visibility
-	Colority
+
+	Drawity
 }
 
-func (p *DrawablePolygon) Draw(c *Context) gg.Drawing {
-	ret := gg.Drawing{
-		EVertices: (&DrawableTriangles{
-			Colority: p.Colority,
-			Triangles: p.MakeTriangles(),
-		}).MakeEVertices(c),
-	}
-	return ret
+func (p *DrawablePolygon) Draw(c gg.Context) *gg.Drawing {
+	tri := &DrawableTriangles{}
+	tri.Triangles = p.MakeTriangles()
+	tri.Drawity = p.Drawity
+	return tri.Draw(c)
 }
 

ox/rect.go

@@ -13,30 +13,30 @@ import "surdeus.su/core/gg/mx"
 // way to move, rotate and scale it.
 type Rectangle struct {
 	ObjectImpl
-	gg.Transform
-	Width, Height Float
+	Transform
+	Width, Height mx.Float
 }
 
 // Return points of vertices of the rectangle.
 func (r Rectangle) Vertices() mx.Vectors {
 	t := r.Transform
-	wh := V(r.Width, r.Height)
-	t.SetAround(t.Around().Mul(wh))
-	m := t.Matrix()
-	p1 := V(0, 0).Apply(m)
-	p2 := V(wh.X, 0).Apply(m)
-	p3 := V(wh.X, wh.Y).Apply(m)
-	p4 := V(0, wh.Y).Apply(m)
+	wh := mx.Vector{r.Width, r.Height}
+	t.SetAround(t.GetAround().Mul(wh))
+	m := t.GetMatrice()
+	p1 := mx.Vector{0, 0}.Apply(m)
+	p2 := mx.Vector{wh.X, 0}.Apply(m)
+	p3 := mx.Vector{wh.X, wh.Y}.Apply(m)
+	p4 := mx.Vector{0, wh.Y}.Apply(m)
 	return mx.Vectors{p1, p2, p3, p4}
 }
 
 func (r Rectangle) Edges() mx.Lines {
 	vs := r.Vertices()
-	return Lines{
-		Edge{vs[0], vs[1]},
-		Edge{vs[1], vs[2]},
-		Edge{vs[2], vs[3]},
-		Edge{vs[3], vs[0]},
+	return mx.Lines{
+		mx.Line{vs[0], vs[1]},
+		mx.Line{vs[1], vs[2]},
+		mx.Line{vs[2], vs[3]},
+		mx.Line{vs[3], vs[0]},
 	}
 }
 
@@ -55,6 +55,11 @@ func (r Rectangle) MakeTriangles() mx.Triangles {
 }
 
 // Check whether the rectangle contains the point.
+func (r Rectangle) ContainsPoint(pt mx.Vector) bool {
+	return r.MakeTriangles().ContainsPoint(pt)
+}
+
+// Get the points that are contained in the rectangle.
 func (r Rectangle) GetContainedPoints(
 	pts mx.Vectors,
 ) (mx.Vectors) {
@@ -64,19 +69,14 @@ func (r Rectangle) GetContainedPoints(
 // The type describes rectangle that can be drawn.
 type DrawableRectangle struct {
 	Rectangle
-	ShaderOptions
-	
-	// Solid color of the rectangle.
-	// Will be ignored if the Shader
-	// field is not nil.
-	Colority
+	Drawity
 }
 
-func (r *DrawableRectangle) Draw(c *Context) []EVertex {
-	return (&DrawableTriangles{
-		Colority: r.Colority,
-		Triangles: r.MakeTriangles(),
-	}).MakeEVertices(c)
+func (r *DrawableRectangle) Draw(c gg.Context) *gg.Drawing {
+	tri := &DrawableTriangles{}
+	tri.Drawity = r.Drawity
+	tri.Triangles = r.MakeTriangles()
+	return tri.Draw(c)
 	
 	/*// Use the Color as base image if no is provided.
 	//var did bool

ox/sprite.go

@@ -5,22 +5,21 @@ import (
 	//"fmt"
 )
 
-import "surdeus.su/core/gg"
 import "surdeus.su/core/gg/mx"
+import "surdeus.su/core/gg"
 
+var _ = gg.Drawer(&Sprite{})
 type Sprite struct {
-	ObjectImpl
-	gg.Transform
-	ShaderOptions
-	Floating bool
-	Visibility
+	Transform
+
+	Drawity
 }
 
 var (
 	//spritesOp DrawImageOptions
 )
 
-func (s *Sprite) Draw(c Context) []EVertex {
+func (s *Sprite) Draw(c gg.Context) *gg.Drawing {
 	// Nothing to draw.
 	if s.Images[0] == nil {
 		return nil
@@ -28,13 +27,13 @@ func (s *Sprite) Draw(c Context) []EVertex {
 	
 	t := s.GetRectangleToDraw().Transform
 	m := t.GetMatrice()
-	if !s.Floating {
-		m.Concat(c.Camera.GetRealMatrix())
+	if !s.IsFloating() {
+		m.Concat(c.Camera().GetRealMatrice(c))
 	}
 
 	// Drawing without shader.
 	if s.Shader == nil {
-		c.DrawImage(s.Images[0], &ebiten.DrawImageOptions{
+		c.Image().DrawImage(s.Images[0], &ebiten.DrawImageOptions{
 			GeoM: m,
 		})
 		return nil
@@ -42,7 +41,7 @@ func (s *Sprite) Draw(c Context) []EVertex {
 	
 	w, h := s.Images[0].Size()
 	// Drawing with shader.
-	c.DrawRectShader(
+	c.Image().DrawRectShader(
 		w, h,
 		s.Shader,
 		&ebiten.DrawRectShaderOptions{
@@ -63,8 +62,8 @@ func (s *Sprite) GetRectangleToDraw() Rectangle {
 	w, h := s.Images[0].Size()
 	t := s.Transform
 	t.SetAround(
-		t.Around().Mul(
-			V(Float(w), Float(h)),
+		t.GetAround().Mul(
+			mx.Vector{mx.Float(w), mx.Float(h)},
 		),
 	)
 	
@@ -87,15 +86,15 @@ func (s *Sprite) GetRectangle() Rectangle {
 	
 	return Rectangle{
 		Transform: t,
-		Width: Float(w),
-		Height: Float(h),
+		Width: mx.Float(w),
+		Height: mx.Float(h),
 	}
 }
 
 // Get triangles of the rectangle that contains the sprite
 // and has the same widght and height.
-func (s *Sprite) MakeTriangles() Triangles {
-	return s.Rectangle().MakeTriangles()
+func (s *Sprite) MakeTriangles() mx.Triangles {
+	return s.GetRectangle().MakeTriangles()
 }
 
 func (s *Sprite) Vertices() mx.Vectors {
@@ -106,10 +105,14 @@ func (s *Sprite) Edges() mx.Lines {
 	return s.GetRectangle().Edges()
 }
 
-func (s *Sprite) ContainsPoint(pt mx.Vector) bool {
+func (s *Sprite) ContainsPoint(
+	pt mx.Vector,
+) bool {
 	return s.GetRectangle().ContainsPoint(pt)
 }
 
-func (s *Sprite) GetContainedPoints(pts mx.Vectors) Points {
-	return s.Rectangle().GetContainedPoints(pts)
+func (s *Sprite) GetContainedPoints(
+	pts mx.Vectors,
+) mx.Vectors {
+	return s.GetRectangle().GetContainedPoints(pts)
 }

ox/text.go

@@ -1,25 +1,36 @@
 package ox
 
-import "surdeus.su/core/gg/mx"
+//import "surdeus.su/core/gg/mx"
 import "surdeus.su/core/gg"
+import "github.com/hajimehoshi/ebiten/v2/text"
+import "github.com/hajimehoshi/ebiten/v2"
 
 // The type implements basic drawable text.
 // (Now needs to implement rotation, scaling etc, cause now only position)
 type Text struct {
 	ObjectImpl
-	mx.Transform
-	Data string
-	Face Face
+	Transform
+
 	Colority
 	Visibility
+	Shaderity
+	Floatity
+
+	Face gg.Face
+	Data string
 }
 
-func (txt *Text) Draw(c gg.Context) []EVertex {
-	m := txt.Matrix()
-	m.Concat(c.Camera.RealMatrix())
+func (txt *Text) Draw(c gg.Context) *gg.Drawing {
+	m := txt.Transform.GetMatrice()
+	if !txt.IsFloating() {
+		m.Concat(c.Camera().GetRealMatrice(c))
+	}
 	//x, y := txt.Position.XY()
 	//text.Draw(c.Image)
-	text.DrawWithOptions(c.Image, txt.Data, txt.Face,
+	text.DrawWithOptions(
+		c.Image(),
+		txt.Data,
+		txt.Face,
 		&ebiten.DrawImageOptions{
 			GeoM: m,
 		},

ox/transform.go

@@ -43,7 +43,7 @@ func T() Transform {
 // Returns whether it needs to be recalculated
 // or not.
 func (t *Transform) IsDirty() bool {
-	return t.dirty
+	return t.dirty || t.parentDirty
 }
 
 // For implementing the Transformer on embedding.

ox/tri.go

@@ -1,20 +1,35 @@
 package ox
 
+import "surdeus.su/core/gg/mx"
+import "surdeus.su/core/gg"
+//import "github.com/hajimehoshi/ebiten/v2"
+
 type DrawableTriangles struct {
-	Triangles
-	Colority
+	mx.Triangles
+
+	Drawity
 }
 
-func (r *DrawableTriangles) MakeEVertices(c *Context) []EVertex {
-	m := c.Camera.RealMatrix()
-	vs := make([]ebiten.Vertex, len(r.Triangles) * 3)
-	var buf Vertex
+func (r *DrawableTriangles) MakeVertices(
+	c gg.Context,
+) gg.Vertices {
+	m := c.Camera().GetRealMatrice(c)
+	vs := make(gg.Vertices, len(r.Triangles) * 3)
+	var buf gg.Vertice
 	buf.Color = r.Color
 	for i := range r.Triangles {
 		for j := range r.Triangles[i] {
 			buf.Dst = r.Triangles[i][j].Apply(m)
-			vs[i*3 + j] = buf.Ebiten()
+			vs[i*3 + j] = buf
 		}
 	}
 	return vs
 }
+
+func (r *DrawableTriangles) Draw(
+	c gg.Context,
+) *gg.Drawing {
+	return &gg.Drawing{
+		Vertices: r.MakeVertices(c),
+	}
+}

tag.go

@@ -0,0 +1,5 @@
+package gg
+
+type Tag int64
+type TagMap map[Tag] struct{}
+

text.go

@@ -4,8 +4,6 @@ import (
 	//"strings"
 	"golang.org/x/image/font"
 	"golang.org/x/image/font/opentype"
-	//"github.com/hajimehoshi/ebiten/v2/text"
-	//"github.com/hajimehoshi/ebiten/v2"
 	"io"
 	//"fmt"
 )

vector.go

@@ -0,0 +1,4 @@
+package gg
+
+//import "surdeus.su/core/gg/mx"
+

vertice.go

@@ -12,15 +12,26 @@ type Vertice struct {
 	Color
 }
 
+// Convert the vertice into the Ebiten's type.
 func (v Vertice) ToAPI() EVertice {
+	r, g, b, a := v.RGBA()
 	return EVertice {
 		DstX: float32(v.Dst.X),
 		DstY: float32(v.Dst.Y),
 		SrcX: float32(v.Src.X),
 		SrcY: float32(v.Src.Y),
-		ColorR: float32(v.Color.R)/(float32(MaxColorValue)),
-		ColorG: float32(v.Color.G)/(float32(MaxColorValue)),
-		ColorB: float32(v.Color.B)/(float32(MaxColorValue)),
-		ColorA: float32(v.Color.A)/(float32(MaxColorValue)),
+		ColorR: float32(r)/(float32(MaxColorValue)),
+		ColorG: float32(g)/(float32(MaxColorValue)),
+		ColorB: float32(b)/(float32(MaxColorValue)),
+		ColorA: float32(a)/(float32(MaxColorValue)),
 	}
 }
+
+type Vertices []Vertice
+func (vs Vertices) ToAPI() []EVertice {
+	ret := make([]EVertice, len(vs))
+	for i, v := range vs {
+		ret[i] = v.ToAPI()
+	}
+	return ret
+}