Implemented shaders on sprites.

src/cmd/test/main.go

@@ -7,6 +7,7 @@ import (
 	"bytes"
 	"log"
 	"strings"
+	"fmt"
 )
 
 type Player struct {
@@ -17,26 +18,65 @@ type Player struct {
 
 type Debug struct{}
 
+type Rect struct {
+	*gx.DrawableRectangle
+}
+
+func NewRect() *Rect {
+	return &Rect{&gx.DrawableRectangle{
+			Rectangle: gx.Rectangle{
+				W: 200,
+				H: 400,
+				T: gx.T(),
+			},
+			Color: gx.Color{
+				gx.MaxColorV,
+				0,
+				0,
+				gx.MaxColorV,
+			},
+			Visible: true,
+			/*Shader: gx.SolidWhiteColorShader,
+			Options: gx.ShaderOptions{
+				Images: [4]*gx.Image{
+					playerImg,
+					nil,
+					nil,
+					nil,
+				},
+			},*/
+	}}
+}
+
+func (r *Rect) Update(e *gx.Engine) error {
+	return nil
+}
+
 var (
 	playerImg *gx.Image
 )
 
 func NewPlayer() *Player {
-	return &Player{
+	ret := &Player{
 		Sprite: &gx.Sprite{
 			T: gx.Transform {
 				S: gx.Vector{5, 5},
 				RA: gx.Vector{320, 240},
 			},
-			I: playerImg,
 			Visible: true,
+			Shader: gx.SolidWhiteColorShader,
 		},
 		MoveSpeed: 90.,
 		ScaleSpeed: .2,
 	}
+	
+	ret.Images[0] = playerImg
+	
+	return ret
 }
 
-func (p *Player) Start(e *gx.Engine) {
+func (p *Player) Start(e *gx.Engine, v ...any) {
+	fmt.Println("starting")
 	c := e.Camera()
 	c.T.RA = gx.V(360, -240)
 }
@@ -130,28 +170,6 @@ func main() {
 
 	e.Add(0, NewPlayer())
 	e.Add(1, &Debug{})
-	e.Add(-1, gx.DrawableRectangle{
-		Rectangle: gx.Rectangle{
-			W: 4,
-			H: 4,
-			T: gx.T(),
-		},
-		Color: gx.Color{
-			gx.MaxColorV,
-			0,
-			0,
-			gx.MaxColorV,
-		},
-		Visible: true,
-		Shader: gx.SolidWhiteColorShader,
-		Options: gx.ShaderOptions{
-			Images: [4]*gx.Image{
-				playerImg,
-				nil,
-				nil,
-				nil,
-			},
-		},
-	})
+	e.Add(-1, NewRect())
 	e.Run()
 }

src/gx/main.go

@@ -20,8 +20,12 @@ type Layer int
 // Window configuration type.
 type WindowConfig struct {
 	Title string
-	Width, Height int
-	FixedSize bool
+	
+	Width,
+	Height int
+	
+	FixedSize,
+	Fullscreen,
 	VSync bool
 }
 
@@ -29,7 +33,7 @@ type WindowConfig struct {
 type Engine struct {
 	wcfg *WindowConfig
 	layers *sparsex.Sparse[Layer, *poolx.Pool[Drawer]]
-	behavers *poolx.Pool[Behaver]
+	updaters *poolx.Pool[Updater]
 	lastTime time.Time
 	dt Float
 	camera *Camera
@@ -72,26 +76,36 @@ func New(
 					S: Vector{1, 1},
 			},
 		},
-		behavers: poolx.New[Behaver](),
+		updaters: poolx.New[Updater](),
 	}
 }
 
 // Add new object considering what
 // interfaces it implements.
 func (e *Engine) Add(l Layer, b any) {
-	beh, ok := b.(Behaver)
+	starter, ok := b.(Starter)
 	if ok {
-		e.addBehaver(beh)
+		starter.Start(e)
 	}
 	
-	drw, ok := b.(Drawer)
+	updater, ok := b.(Updater)
 	if ok {
-		e.addDrawer(l, drw)
+		e.addUpdater(updater)
+	}
+
+	drawer, ok := b.(Drawer)
+	if ok {
+		e.addDrawer(l, drawer)
 	}
 }
 
-// Del object from Engine.
-func (e *Engine) Del(b any) {
+// Delete object from Engine.
+func (e *Engine) Del(b any, v ...any) {
+	deleter, ok := b.(Deleter)
+	if ok {
+		deleter.Delete(e, v...)
+	}
+	
 	drawer, ok := b.(Drawer)
 	if ok {
 		for layer := range e.layers.Vals() {
@@ -99,9 +113,9 @@ func (e *Engine) Del(b any) {
 		}
 	}
 	
-	behaver, ok := b.(Behaver)
+	updater, ok := b.(Updater)
 	if ok {
-		e.behavers.Del(behaver)
+		e.updaters.Del(updater)
 	}
 	
 }
@@ -121,9 +135,8 @@ func (e *Engine) addDrawer(l Layer, d Drawer) {
 
 }
 
-func (e *Engine) addBehaver(b Behaver) {
-	e.behavers.Append(b)
-	b.Start(e)
+func (e *Engine) addUpdater(b Updater) {
+	e.updaters.Append(b)
 }
 
 func (e *engine) Update() error {
@@ -134,7 +147,7 @@ func (e *engine) Update() error {
 		AppendPressedKeys(e.keys[:0])
 
 	e.dt = time.Since(e.lastTime).Seconds()
-	for p := range eng.behavers.Range() {
+	for p := range eng.updaters.Range() {
 		err = p.V.Update(eng)
 		if err != nil {
 			return err

src/gx/object.go

@@ -4,8 +4,9 @@ package gx
 // will call the function OnStart
 // when first appear on scene BEFORE
 // the OnUpdate.
+// The v value will be get from Add function.
 type Starter interface {
-	Start(*Engine)
+	Start(*Engine, ...any)
 }
 
 // Implementing the interface type
@@ -15,9 +16,10 @@ type Updater interface {
 	Update(*Engine) error
 }
 
-// The general interface for 
-type Behaver interface {
-	Starter
-	Updater
+// Implementing the interface type
+// will call the function on deleting
+// the object.
+type Deleter interface {
+	Delete(*Engine, ...any)
 }
 

src/gx/rect.go

@@ -22,14 +22,19 @@ type Rectangle struct {
 type DrawableRectangle struct {
 	Rectangle
 	
-	Shader *Shader
 	// Solid color of the rectangle.
 	// Will be ignored if the Shader
 	// field is not nil.
 	Color Color
 	
-	Options ShaderOptions
+	// Shader to be applied
+	Shader *Shader
+	// Shader variables.
+	Uniforms map[string] any
+	// Shader images
+	Images [4]*Image
 	
+	// Should be draw or not.
 	Visible bool
 }
 
@@ -56,26 +61,29 @@ func NewImage(w, h int) (*Image) {
 	return ebiten.NewImage(w, h)
 }
 
-func (r DrawableRectangle) IsVisible() bool {
+func (r *DrawableRectangle) IsVisible() bool {
 	return r.Visible
 }
 
-func (r DrawableRectangle) Draw(
+func (r *DrawableRectangle) Draw(
 	e *Engine,
 	i *Image,
 ) {
 	t := r.T
-	t.S.X *= r.W
-	t.S.Y *= r.H
-	
-	rm := e.Camera().RealMatrix(e, true)
-	m := t.Matrix(e)
-	m.Concat(rm)
 	
 	// Draw solid color if no shader.
 	if r.Shader == nil {
 		img := NewImage(1, 1)
 		img.Set(0, 0, r.Color)
+		
+		t.S.X *= r.W
+		t.S.Y *= r.H
+		
+		m := t.Matrix(e)
+		rm := e.Camera().RealMatrix(e, true)
+		
+		m.Concat(rm)
+		
 		opts := &ebiten.DrawImageOptions{
 			GeoM: m,
 		}
@@ -83,20 +91,35 @@ func (r DrawableRectangle) Draw(
 		return
 	}
 	
+	
 	// Use the Color as base image if no is provided.
-	if r.Options.Images[0] == nil {
-		r.Options.Images[0] = NewImage(1, 1)
-		r.Options.Images[0].Set(0, 0, r.Color)
+	var did bool
+	if r.Images[0] == nil {
+		r.Images[0] = NewImage(1, 1)
+		r.Images[0].Set(0, 0, r.Color)
+		did = true
 	} 
 	
+	w, h := r.Images[0].Size()
+	if !did {
+		t.S.X /= Float(w)
+		t.S.Y /= Float(h)
+		
+		t.S.X *= r.W
+		t.S.Y *= r.H
+	}
+	
+	
+	rm := e.Camera().RealMatrix(e, true)
+	m := t.Matrix(e)
+	m.Concat(rm)
+	
 	// Drawing with shader.
 	opts := &ebiten.DrawRectShaderOptions{
 		GeoM: m,
-		Images: r.Options.Images,
-		Uniforms: r.Options.Uniforms,
+		Images: r.Images,
+		Uniforms: r.Uniforms,
 	}
-	
-	w, h := r.Options.Images[0].Size()
 	i.DrawRectShader(w, h, r.Shader, opts)
 }
 

src/gx/sprite.go

@@ -5,9 +5,10 @@ import (
 )
 
 type Sprite struct {
-	I *Image
 	T Transform
-	S *Shader
+	Shader *Shader
+	Images [4]*Image
+	Uniforms map[string] any
 	Floating, Visible bool
 }
 
@@ -15,25 +16,37 @@ func (s *Sprite) Draw(
 	e *Engine,
 	i *Image,
 ) {
-	op := &ebiten.DrawImageOptions{
-		
+	// Nothing to draw.
+	if s.Images[0] == nil {
+		return
 	}
+	
 	m := &Matrix{}
 
 	m.Concat(s.T.Matrix(e))
-	if e.camera != nil {
-		m.Concat(e.camera.RealMatrix(
+	if !s.Floating {
+		m.Concat(e.Camera().RealMatrix(
 			e,
 			true,
 		))
 	}
 
-	op.GeoM = *m
-	/*if s.S != nil {
-		bufImg := ebiten.NewImageFromImage(s.I)
-	} */
+	// Drawing without shader.
+	if s.Shader == nil {
+		opts := &ebiten.DrawImageOptions{}
+		opts.GeoM = *m
+		i.DrawImage(s.Images[0], opts)
+		return
+	}
 	
-	i.DrawImage(s.I, op)
+	// Drawing with shader.
+	w, h := s.Images[0].Size()
+	opts := &ebiten.DrawRectShaderOptions{
+		Images: s.Images,
+		Uniforms: s.Uniforms,
+		GeoM: *m,
+	}
+	i.DrawRectShader(w, h, s.Shader, opts)
 }
 
 func (s *Sprite) IsVisible() bool {