Started texture mapped fonts demo.

CHANGELOG.md

@@ -1,10 +0,0 @@
-# Changelog
-
-## 0.2_beta
-
-* code restructuring
-* added system access functions (like GetSpriteRenderer())
-
-## 0.1_beta
-
-* beta release

README.md

@@ -1,14 +1,15 @@
 # go-game (package "goga")
 
 Game engine written in Go using OpenGL and GLFW. Mostly for 2D rendering, but also capable of rendering 3D, providing everything to get you started.
+**Under heavy development, do not use yet!**
 
 ## Install
 
 go-game requires OpenGL and GLFW. The following three steps install everything you need:
 
 ```
-go get github.com/go-gl/gl/v3.2-core/gl
-go get github.com/go-gl/glfw/v3.2/glfw
+go get github.com/go-gl/gl/v4.5-core/gl
+go get github.com/go-gl/glfw/v3.1/glfw
 go get github.com/DeKugelschieber/go-game
 ```
 
@@ -16,16 +17,18 @@ You also need a cgo compiler (typically gcc) and GL/GLFW development libraries a
 
 ## Usage
 
+*WIP*
+
 Examples can be found within the demo folder. For full reference visit: https://godoc.org/github.com/DeKugelschieber/go-game
 
 ## Dependencies
 
 * https://github.com/go-gl/gl
-    - 3.1-core
+    - 4.5-core
 * https://github.com/go-gl/glfw
     - 3.1
 
-To use a different GL version, you need to replace the GL imports in package goga.
+To use an older GL version, you need to replace the GL imports in package goga. It should mostly be compatible down to 3.x.
 
 ## Contribute
 

ToDo.md

@@ -2,9 +2,6 @@
 
 * ~~cleanup resources~~
 * more logging
-* ~~limit FPS~~
-    - does this really work?
-* ~~fullscreen~~
-* ~~simple access to default resources like GetTex()~~
-* ~~text rendering + font loading~~
-* more options for GLFW
+* limit FPS
+* fullscreen
+* simple access to default resources like GetTex()

actor.go

@@ -1,8 +1,6 @@
 package goga
 
-var (
-	actorIdGen = ActorId(0)
-)
+import ()
 
 // An actor ID is a unique integer,
 // which can be used to reference an actor.
@@ -14,6 +12,10 @@ type Actor struct {
 	id ActorId
 }
 
+var (
+	actorIdGen = ActorId(0)
+)
+
 // Creates a new basic actor with unique ID.
 func NewActor() *Actor {
 	actorIdGen++

culling.go

@@ -80,14 +80,14 @@ func (c *Culling2D) GetName() string {
 
 // Updates visibility of all contained sprites.
 func (c *Culling2D) Update(delta float64) {
-	for _, cullable := range c.cullables {
-		if cullable.Pos.X > c.viewport.Z ||
-			cullable.Pos.X+cullable.Size.X < c.viewport.X ||
-			cullable.Pos.Y > c.viewport.W ||
-			cullable.Pos.Y+cullable.Size.Y < c.viewport.Y {
-			cullable.Visible = false
+	for i := range c.cullables {
+		if c.cullables[i].Pos.X > c.viewport.Z ||
+			c.cullables[i].Pos.X+c.cullables[i].Size.X < c.viewport.X ||
+			c.cullables[i].Pos.Y > c.viewport.W ||
+			c.cullables[i].Pos.Y+c.cullables[i].Size.Y < c.viewport.Y {
+			c.cullables[i].Visible = false
 		} else {
-			cullable.Visible = true
+			c.cullables[i].Visible = true
 		}
 	}
 }

default_shader.go

@@ -1,83 +0,0 @@
-package goga
-
-const (
-	// constants for default 2D shader
-	Default_shader_2D_vertex_attrib   = "vertex"
-	Default_shader_2D_texcoord_attrib = "texCoord"
-	Default_shader_2D_ortho           = "o"
-	Default_shader_2D_model           = "m"
-	Default_shader_2D_tex             = "tex"
-
-	// source for 2D shader
-	default_shader_2d_vertex_src = `#version 130
-		uniform mat3 o, m;
-		in vec2 vertex;
-		in vec2 texCoord;
-		out vec2 tc;
-		void main(){
-			tc = texCoord;
-			gl_Position = vec4(o*m*vec3(vertex, 1.0), 1.0);
-		}`
-	default_shader_2d_fragment_src = `#version 130
-		precision highp float;
-		uniform sampler2D tex;
-		in vec2 tc;
-		out vec4 color;
-		void main(){
-			color = texture(tex, tc);
-		}`
-
-	// constants for default 3D shader
-	Default_shader_3D_vertex_attrib   = "vertex"
-	Default_shader_3D_texcoord_attrib = "texCoord"
-	Default_shader_3D_pv              = "pv"
-	Default_shader_3D_model           = "m"
-	Default_shader_3D_tex             = "tex"
-
-	// source for 3D shader
-	default_shader_3d_vertex_src = `#version 130
-		uniform mat4 pv, m;
-		in vec3 vertex;
-		in vec2 texCoord;
-		out vec2 tc;
-		void main(){
-			tc = texCoord;
-			gl_Position = pv*m*vec4(vertex, 1.0);
-		}`
-	default_shader_3d_fragment_src = `#version 130
-		precision highp float;
-		uniform sampler2D tex;
-		in vec2 tc;
-		out vec4 color;
-		void main(){
-			color = texture(tex, tc);
-		}`
-
-	// constants for default text shader
-	Default_shader_text_vertex_attrib   = "vertex"
-	Default_shader_text_texcoord_attrib = "texCoord"
-	Default_shader_text_ortho           = "o"
-	Default_shader_text_model           = "m"
-	Default_shader_text_tex             = "tex"
-	Default_shader_text_color           = "color"
-
-	// source for text shader
-	default_shader_text_vertex_src = `#version 130
-		uniform mat3 o, m;
-		in vec2 vertex;
-		in vec2 texCoord;
-		out vec2 tc;
-		void main(){
-			tc = texCoord;
-			gl_Position = vec4(o*m*vec3(vertex, 1.0), 1.0);
-		}`
-	default_shader_text_fragment_src = `#version 130
-		precision highp float;
-		uniform sampler2D tex;
-		uniform vec4 color;
-		in vec2 tc;
-		out vec4 c;
-		void main(){
-			c = texture(tex, tc)*color;
-		}`
-)

demo/input/input.go

@@ -1,77 +0,0 @@
-package main
-
-import (
-	"github.com/DeKugelschieber/go-game"
-	"github.com/go-gl/glfw/v3.2/glfw"
-)
-
-const (
-	gopher_path = "src/github.com/DeKugelschieber/go-game/demo/input/assets/gopher.png"
-)
-
-type Game struct {
-	mouseX, mouseY float64
-	sprite         *goga.Sprite
-}
-
-func (g *Game) Setup() {
-	// load texture
-	_, err := goga.LoadRes(gopher_path)
-
-	if err != nil {
-		panic(err)
-	}
-
-	// create sprite
-	tex, err := goga.GetTex("gopher.png")
-
-	if err != nil {
-		panic(err)
-	}
-
-	sprite := goga.NewSprite(tex)
-	sprite.Size.X = sprite.Size.X / 4
-	sprite.Size.Y = sprite.Size.Y / 4
-	g.sprite = sprite
-	renderer := goga.GetSpriteRenderer()
-	renderer.Add(sprite.Actor, sprite.Pos2D, sprite.Tex)
-
-	culling := goga.GetCulling2DSystem()
-	culling.Add(sprite.Actor, sprite.Pos2D)
-
-	// register input listeners
-	goga.AddKeyboardListener(g)
-	goga.AddMouseListener(g)
-}
-
-func (g *Game) Update(delta float64) {}
-
-func (g *Game) OnKeyEvent(key glfw.Key, code int, action glfw.Action, mod glfw.ModifierKey) {
-	// ESC
-	if key == 256 {
-		goga.Stop()
-	}
-}
-
-func (g *Game) OnMouseButton(button glfw.MouseButton, action glfw.Action, mod glfw.ModifierKey) {
-	if button == 0 {
-		g.sprite.Pos.X = g.mouseX
-		g.sprite.Pos.Y = g.mouseY
-	}
-}
-
-func (g *Game) OnMouseMove(x float64, y float64) {
-	g.mouseX = x
-	g.mouseY = y
-}
-
-func (g *Game) OnMouseScroll(x float64, y float64) {}
-
-func main() {
-	game := Game{}
-	options := goga.RunOptions{ClearColor: goga.Vec4{1, 1, 1, 0},
-		Resizable:           true,
-		SetViewportOnResize: true,
-		ExitOnClose:         true}
-	goga.Run(&game, &options)
-}

demo/keyframe/keyframe.go

@@ -39,7 +39,12 @@ func (g *Game) Setup() {
 	sprite.KeyframeAnimation = goga.NewKeyframeAnimation(0, 7, true, 20)
 
 	// add to renderer
-	renderer := goga.GetKeyframeRenderer()
+	renderer, ok := goga.GetSystemByName("keyframeRenderer").(*goga.KeyframeRenderer)
+
+	if !ok {
+		panic("Could not find renderer")
+	}
+
 	renderer.Add(sprite.Actor, sprite.Pos2D, sprite.Tex, sprite.KeyframeSet, sprite.KeyframeAnimation)
 }
 
@@ -50,7 +55,6 @@ func main() {
 	options := goga.RunOptions{ClearColor: goga.Vec4{0, 0, 0, 0},
 		Resizable:           true,
 		SetViewportOnResize: true,
-		ExitOnClose:         true,
-		Fullscreen:          true}
+		ExitOnClose:         true}
 	goga.Run(&game, &options)
 }

demo/model/model.go

@@ -36,7 +36,12 @@ func (g *Game) Setup() {
 	mesh := goga.NewMesh(ply.IndexBuffer, ply.VertexBuffer, ply.TexCoordBuffer)
 
 	model := goga.NewModel(mesh, tex)
-	renderer := goga.GetModelRenderer()
+	renderer, ok := goga.GetSystemByName("modelRenderer").(*goga.ModelRenderer)
+
+	if !ok {
+		panic("Could not find renderer")
+	}
+
 	renderer.Prepare(model)
 	renderer.Add(model.Actor, model.Pos3D, model.Tex, model.Mesh)
 	g.model = model

demo/sprite/sprite.go

@@ -26,10 +26,20 @@ func (g *Game) Setup() {
 	}
 
 	sprite := goga.NewSprite(tex)
-	renderer := goga.GetSpriteRenderer()
+	renderer, ok := goga.GetSystemByName("spriteRenderer").(*goga.SpriteRenderer)
+
+	if !ok {
+		panic("Could not find renderer")
+	}
+
 	renderer.Add(sprite.Actor, sprite.Pos2D, sprite.Tex)
 
-	culling := goga.GetCulling2DSystem()
+	culling, ok := goga.GetSystemByName("culling2d").(*goga.Culling2D)
+
+	if !ok {
+		panic("Could not find culling")
+	}
+
 	culling.Add(sprite.Actor, sprite.Pos2D)
 }
 

demo/text/assets/dejavu.json

@@ -0,0 +1,28 @@
+[
+	{
+		"char": "A",
+		"x": 0,
+		"y": 0
+	},
+	{
+		"char": "b",
+		"x": 1,
+		"y": 0
+	},
+	{
+		"char": "e",
+		"x": 2,
+		"y": 0
+	},
+	{
+		"char": "r",
+		"x": 0,
+		"y": 1
+	},
+	{
+		"char": "'",
+		"x": 3,
+		"y": 0,
+		"offset": 0.5
+	}
+]

demo/text/assets/victor.json

@@ -1,113 +0,0 @@
-[
-    {"char":"a", "x": 0, "y": 0, "offset": 0},
-    {"char":"b", "x": 1, "y": 0, "offset": 0},
-    {"char":"c", "x": 2, "y": 0, "offset": 0},
-    {"char":"d", "x": 3, "y": 0, "offset": 0},
-    {"char":"e", "x": 4, "y": 0, "offset": 0},
-    {"char":"f", "x": 5, "y": 0, "offset": 0},
-    {"char":"g", "x": 6, "y": 0, "offset": 0},
-    {"char":"h", "x": 7, "y": 0, "offset": 0},
-    {"char":"i", "x": 8, "y": 0, "offset": 0},
-    {"char":"j", "x": 9, "y": 0, "offset": 0},
-    {"char":"k", "x": 10, "y": 0, "offset": 0},
-    {"char":"l", "x": 11, "y": 0, "offset": 0},
-    {"char":"m", "x": 12, "y": 0, "offset": 0},
-    {"char":"n", "x": 13, "y": 0, "offset": 0},
-    {"char":"o", "x": 14, "y": 0, "offset": 0},
-    {"char":"p", "x": 15, "y": 0, "offset": 0},
-    {"char":"q", "x": 16, "y": 0, "offset": 0},
-    {"char":"r", "x": 17, "y": 0, "offset": 0},
-    {"char":"s", "x": 18, "y": 0, "offset": 0},
-    {"char":"t", "x": 19, "y": 0, "offset": 0},
-    {"char":"u", "x": 20, "y": 0, "offset": 0},
-    {"char":"v", "x": 21, "y": 0, "offset": 0},
-    {"char":"w", "x": 22, "y": 0, "offset": 0},
-    {"char":"x", "x": 23, "y": 0, "offset": 0},
-    {"char":"y", "x": 24, "y": 0, "offset": 0},
-    {"char":"z", "x": 25, "y": 0, "offset": 0},
-
-    {"char":"A", "x": 0, "y": 0, "offset": 0},
-    {"char":"B", "x": 1, "y": 0, "offset": 0},
-    {"char":"C", "x": 2, "y": 0, "offset": 0},
-    {"char":"D", "x": 3, "y": 0, "offset": 0},
-    {"char":"E", "x": 4, "y": 0, "offset": 0},
-    {"char":"F", "x": 5, "y": 0, "offset": 0},
-    {"char":"G", "x": 6, "y": 0, "offset": 0},
-    {"char":"H", "x": 7, "y": 0, "offset": 0},
-    {"char":"I", "x": 8, "y": 0, "offset": 0},
-    {"char":"J", "x": 9, "y": 0, "offset": 0},
-    {"char":"K", "x": 10, "y": 0, "offset": 0},
-    {"char":"L", "x": 11, "y": 0, "offset": 0},
-    {"char":"M", "x": 12, "y": 0, "offset": 0},
-    {"char":"N", "x": 13, "y": 0, "offset": 0},
-    {"char":"O", "x": 14, "y": 0, "offset": 0},
-    {"char":"P", "x": 15, "y": 0, "offset": 0},
-    {"char":"Q", "x": 16, "y": 0, "offset": 0},
-    {"char":"R", "x": 17, "y": 0, "offset": 0},
-    {"char":"S", "x": 18, "y": 0, "offset": 0},
-    {"char":"T", "x": 19, "y": 0, "offset": 0},
-    {"char":"U", "x": 20, "y": 0, "offset": 0},
-    {"char":"V", "x": 21, "y": 0, "offset": 0},
-    {"char":"W", "x": 22, "y": 0, "offset": 0},
-    {"char":"X", "x": 23, "y": 0, "offset": 0},
-    {"char":"Y", "x": 24, "y": 0, "offset": 0},
-    {"char":"Z", "x": 25, "y": 0, "offset": 0},
-
-    {"char":"0", "x": 26, "y": 0, "offset": 0},
-    {"char":"1", "x": 27, "y": 0, "offset": 0},
-    {"char":"2", "x": 28, "y": 0, "offset": 0},
-    {"char":"3", "x": 29, "y": 0, "offset": 0},
-    {"char":"4", "x": 30, "y": 0, "offset": 0},
-    {"char":"5", "x": 31, "y": 0, "offset": 0},
-    {"char":"6", "x": 32, "y": 0, "offset": 0},
-    {"char":"7", "x": 33, "y": 0, "offset": 0},
-    {"char":"8", "x": 34, "y": 0, "offset": 0},
-    {"char":"9", "x": 35, "y": 0, "offset": 0},
-
-    {"char":"ö", "x": 36, "y": 0, "offset": 0},
-    {"char":"ä", "x": 37, "y": 0, "offset": 0},
-    {"char":"ü", "x": 38, "y": 0, "offset": 0},
-    {"char":"ß", "x": 39, "y": 0, "offset": 0},
-
-    {"char":"Ö", "x": 36, "y": 0, "offset": 0},
-    {"char":"Ä", "x": 37, "y": 0, "offset": 0},
-    {"char":"Ü", "x": 38, "y": 0, "offset": 0},
-
-    {"char":",", "x": 68, "y": 0, "offset": -0.25},
-    {"char":";", "x": 69, "y": 0, "offset": 0},
-    {"char":".", "x": 70, "y": 0, "offset": 0},
-    {"char":":", "x": 71, "y": 0, "offset": 0},
-    {"char":"-", "x": 72, "y": 0, "offset": 0},
-    {"char":"_", "x": 73, "y": 0, "offset": 0},
-
-    {"char":"^", "x": 40, "y": 0, "offset": 0},
-    {"char":"°", "x": 41, "y": 0, "offset": 0},
-    {"char":"!", "x": 42, "y": 0, "offset": 0},
-    {"char":"\"", "x": 43, "y": 0, "offset": 0},
-    {"char":"§", "x": 44, "y": 0, "offset": 0},
-    {"char":"$", "x": 45, "y": 0, "offset": 0},
-    {"char":"%", "x": 46, "y": 0, "offset": 0},
-    {"char":"&", "x": 47, "y": 0, "offset": 0},
-    {"char":"/", "x": 48, "y": 0, "offset": 0},
-    {"char":"(", "x": 49, "y": 0, "offset": 0},
-    {"char":")", "x": 50, "y": 0, "offset": 0},
-    {"char":"=", "x": 51, "y": 0, "offset": 0},
-    {"char":"?", "x": 52, "y": 0, "offset": 0},
-    {"char":"`", "x": 53, "y": 0, "offset": 0},
-    {"char":"²", "x": 54, "y": 0, "offset": 0},
-    {"char":"³", "x": 55, "y": 0, "offset": 0},
-    {"char":"{", "x": 56, "y": 0, "offset": 0},
-    {"char":"[", "x": 57, "y": 0, "offset": 0},
-    {"char":"]", "x": 58, "y": 0, "offset": 0},
-    {"char":"}", "x": 59, "y": 0, "offset": 0},
-    {"char":"\\", "x": 60, "y": 0, "offset": 0},
-    {"char":"+", "x": 61, "y": 0, "offset": 0},
-    {"char":"*", "x": 62, "y": 0, "offset": 0},
-    {"char":"~", "x": 63, "y": 0, "offset": 0},
-    {"char":"#", "x": 64, "y": 0, "offset": 0},
-    {"char":"<", "x": 65, "y": 0, "offset": 0},
-    {"char":">", "x": 66, "y": 0, "offset": 0},
-    {"char":"|", "x": 67, "y": 0, "offset": 0},
-    {"char":"'", "x": 68, "y": 0, "offset": 0},
-    {"char":"'", "x": 69, "y": 0, "offset": 0}
-]

demo/text/text.go

@@ -2,65 +2,52 @@ package main
 
 import (
 	"github.com/DeKugelschieber/go-game"
-	"github.com/go-gl/gl/v3.2-core/gl"
 )
 
 const (
-	font_path = "src/github.com/DeKugelschieber/go-game/demo/text/assets/victor.png"
-	font_json = "src/github.com/DeKugelschieber/go-game/demo/text/assets/victor.json"
+	gopher_path = "src/github.com/DeKugelschieber/go-game/demo/sprite/assets/gopher.png"
 )
 
 type Game struct{}
 
 func (g *Game) Setup() {
 	// load texture
-	pngLoader, ok := goga.GetLoaderByExt("png").(*goga.PngLoader)
+	_, err := goga.LoadRes(gopher_path)
+
+	if err != nil {
+		panic(err)
+	}
+
+	// create sprite
+	tex, err := goga.GetTex("gopher.png")
+
+	if err != nil {
+		panic(err)
+	}
+
+	sprite := goga.NewSprite(tex)
+	renderer, ok := goga.GetSystemByName("spriteRenderer").(*goga.SpriteRenderer)
 
 	if !ok {
-		panic("Could not get PNG loader")
+		panic("Could not find renderer")
 	}
 
-	pngLoader.KeepData = true
-	pngLoader.Filter = gl.NEAREST
-	_, err := goga.LoadRes(font_path)
+	renderer.Add(sprite.Actor, sprite.Pos2D, sprite.Tex)
 
-	if err != nil {
-		panic(err)
+	culling, ok := goga.GetSystemByName("culling2d").(*goga.Culling2D)
+
+	if !ok {
+		panic("Could not find culling")
 	}
 
-	pngLoader.KeepData = false
-	pngLoader.Filter = gl.LINEAR
-
-	// create font
-	tex, err := goga.GetTex("victor.png")
-
-	if err != nil {
-		panic(err)
-	}
-
-	font := goga.NewFont(tex, 16)
-
-	if err := font.FromJson(font_json, true); err != nil {
-		panic(err)
-	}
-
-	// setup renderer
-	renderer := goga.GetTextRenderer()
-	renderer.Font = font
-
-	// create and add text
-	text := goga.NewText(font, "Hello, World!_")
-	text.Size = goga.Vec2{16, 16}
-	text.Pos = goga.Vec2{20, 20}
-	renderer.Prepare(text)
-	renderer.Add(text.Actor, text.Pos2D, text.TextComponent)
+	culling.Add(sprite.Actor, sprite.Pos2D)
 }
 
 func (g *Game) Update(delta float64) {}
 
 func main() {
 	game := Game{}
-	options := goga.RunOptions{ClearColor: goga.Vec4{0, 0, 0, 0},
+	options := goga.RunOptions{ClearColor: goga.Vec4{1, 1, 1, 0},
 		Resizable:           true,
 		SetViewportOnResize: true,
 		ExitOnClose:         true}

drop.go

@@ -7,7 +7,7 @@ type Dropable interface {
 }
 
 // Drops given GL objects.
-// Objects must implement the Dropable interface.
+// Objects must implement the Dropable inteface.
 func Drop(objects []Dropable) {
 	for _, obj := range objects {
 		obj.Drop()

fbo.go

@@ -1,7 +1,7 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 )
 
 // Frame Buffer Object.

game.go

@@ -1,8 +1,8 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v3.2-core/gl"
-	"github.com/go-gl/glfw/v3.2/glfw"
+	"github.com/go-gl/gl/v4.5-core/gl"
+	"github.com/go-gl/glfw/v3.1/glfw"
 	"log"
 	"math"
 	"runtime"
@@ -14,20 +14,86 @@ const (
 	default_height        = uint32(400)
 	default_title         = "Game"
 	default_exit_on_close = true
-)
 
-var (
-	running        = true
-	clearColor     = Vec4{}
-	clearBuffer    []uint32
-	viewportWidth  int
-	viewportHeight int
+	// constants for default 2D shader
+	Default_shader_2D_vertex_attrib   = "vertex"
+	Default_shader_2D_texcoord_attrib = "texCoord"
+	Default_shader_2D_ortho           = "o"
+	Default_shader_2D_model           = "m"
+	Default_shader_2D_tex             = "tex"
 
-	// Default resources
-	DefaultCamera     *Camera
-	Default2DShader   *Shader
-	Default3DShader   *Shader
-	DefaultTextShader *Shader
+	// source for 2D shader
+	default_shader_2d_vertex_src = `#version 130
+		uniform mat3 o, m;
+		in vec2 vertex;
+		in vec2 texCoord;
+		out vec2 tc;
+		void main(){
+			tc = texCoord;
+			gl_Position = vec4(o*m*vec3(vertex, 1.0), 1.0);
+		}`
+	default_shader_2d_fragment_src = `#version 130
+		precision highp float;
+		uniform sampler2D tex;
+		in vec2 tc;
+		out vec4 color;
+		void main(){
+			color = texture(tex, tc);
+		}`
+
+	// constants for default 3D shader
+	Default_shader_3D_vertex_attrib   = "vertex"
+	Default_shader_3D_texcoord_attrib = "texCoord"
+	Default_shader_3D_pv              = "pv"
+	Default_shader_3D_model           = "m"
+	Default_shader_3D_tex             = "tex"
+
+	// source for 3D shader
+	default_shader_3d_vertex_src = `#version 130
+		uniform mat4 pv, m;
+		in vec3 vertex;
+		in vec2 texCoord;
+		out vec2 tc;
+		void main(){
+			tc = texCoord;
+			gl_Position = pv*m*vec4(vertex, 1.0);
+		}`
+	default_shader_3d_fragment_src = `#version 130
+		precision highp float;
+		uniform sampler2D tex;
+		in vec2 tc;
+		out vec4 color;
+		void main(){
+			color = texture(tex, tc);
+		}`
+
+	// constants for default text shader
+	Default_shader_text_vertex_attrib   = "vertex"
+	Default_shader_text_texcoord_attrib = "texCoord"
+	Default_shader_text_ortho           = "o"
+	Default_shader_text_model           = "m"
+	Default_shader_text_tex             = "tex"
+	Default_shader_text_color           = "color"
+
+	// source for text shader
+	default_shader_text_vertex_src = `#version 130
+		uniform mat3 o, m;
+		in vec2 vertex;
+		in vec2 texCoord;
+		out vec2 tc;
+		void main(){
+			tc = texCoord;
+			gl_Position = vec4(o*m*vec3(vertex, 1.0), 1.0);
+		}`
+	default_shader_text_fragment_src = `#version 130
+		precision highp float;
+		uniform sampler2D tex;
+		uniform vec4 color;
+		in vec2 tc;
+		out vec4 c;
+		void main(){
+			c = texture(tex, tc)*color;
+		}`
 )
 
 // If set in RunOptions, the function will be called on window resize.
@@ -43,9 +109,6 @@ type RunOptions struct {
 	SetViewportOnResize bool
 	ResizeCallbackFunc  ResizeCallback
 	ExitOnClose         bool
-	RefreshRate         int
-	Fullscreen          bool
-	MonitorId           uint // index
 }
 
 // Main game object.
@@ -57,9 +120,22 @@ type Game interface {
 	Update(float64)
 }
 
+var (
+	running        = true
+	clearColor     = Vec4{}
+	clearBuffer    []uint32
+	viewportWidth  int
+	viewportHeight int
+
+	// Default resources
+	DefaultCamera     *Camera
+	Default2DShader   *Shader
+	Default3DShader   *Shader
+	DefaultTextShader *Shader
+)
+
 func init() {
-	// GL functions must be called from main thread,
-	// so we disable multithreading by the runtime here.
+	// GL functions must be called from main thread.
 	log.Print("Locking OS thread")
 	runtime.LockOSThread()
 }
@@ -92,52 +168,32 @@ func Run(game Game, options *RunOptions) {
 	title := default_title
 	exitOnClose := default_exit_on_close
 
+	if options != nil && options.Width > 0 {
+		width = options.Width
+	}
+
+	if options != nil && options.Height > 0 {
+		height = options.Height
+	}
+
+	if options != nil && len(options.Title) > 0 {
+		title = options.Title
+	}
+
 	if options != nil {
-		if options.Width > 0 {
-			width = options.Width
-		}
-
-		if options.Height > 0 {
-			height = options.Height
-		}
-
-		if len(options.Title) > 0 {
-			title = options.Title
-		}
-
 		exitOnClose = options.ExitOnClose
-
-		if !options.Resizable {
-			glfw.WindowHint(glfw.Resizable, glfw.False)
-		}
 	}
 
-	var monitor *glfw.Monitor
-
-	if options != nil && options.Fullscreen {
-		monitors := glfw.GetMonitors()
-
-		if int(options.MonitorId) < len(monitors) {
-			monitor = monitors[options.MonitorId]
-		}
+	if options != nil && !options.Resizable {
+		glfw.WindowHint(glfw.Resizable, glfw.False)
 	}
 
-	if monitor != nil {
-		videoMode := monitor.GetVideoMode()
-		width = uint32(videoMode.Width)
-		height = uint32(videoMode.Height)
-	}
-
-	wnd, err := glfw.CreateWindow(int(width), int(height), title, monitor, nil)
+	wnd, err := glfw.CreateWindow(int(width), int(height), title, nil, nil)
 
 	if err != nil {
 		panic("Error creating GLFW window: " + err.Error())
 	}
 
-	if options != nil && options.RefreshRate != 0 {
-		glfw.WindowHint(glfw.RefreshRate, options.RefreshRate)
-	}
-
 	// window event handlers
 	wnd.SetSizeCallback(func(w *glfw.Window, width, height int) {
 		if options == nil {
@@ -155,8 +211,6 @@ func Run(game Game, options *RunOptions) {
 		}
 	})
 
-	initInput(wnd)
-
 	// make GL context current
 	wnd.MakeContextCurrent()
 
@@ -181,8 +235,8 @@ func Run(game Game, options *RunOptions) {
 	delta := time.Duration(0)
 	var deltaSec float64
 
-	for {
-		if !running || exitOnClose && wnd.ShouldClose() {
+	for running {
+		if exitOnClose && wnd.ShouldClose() {
 			cleanup()
 			return
 		}
@@ -256,7 +310,6 @@ func initGoga(width, height int) {
 	AddSystem(NewModelRenderer(nil, nil, false))
 	AddSystem(NewCulling2D(0, 0, width, height))
 	AddSystem(NewKeyframeRenderer(nil, nil))
-	AddSystem(NewTextRenderer(nil, nil, nil)) // font must be set outside!
 }
 
 func cleanup() {

gl_util.go

@@ -1,7 +1,7 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 	"log"
 )
 

input.go

@@ -1,98 +0,0 @@
-package goga
-
-import (
-	"github.com/go-gl/glfw/v3.2/glfw"
-)
-
-var (
-	keyboardListener []KeyboardListener
-	mouseListener    []MouseListener
-)
-
-// Interface for keyboard input events.
-// Implement and register to receive keyboard input.
-type KeyboardListener interface {
-	OnKeyEvent(glfw.Key, int, glfw.Action, glfw.ModifierKey)
-}
-
-// Interface for mouse input events.
-// Implement and register to receive mouse input.
-type MouseListener interface {
-	OnMouseButton(glfw.MouseButton, glfw.Action, glfw.ModifierKey)
-	OnMouseMove(float64, float64)
-	OnMouseScroll(float64, float64)
-}
-
-func initInput(wnd *glfw.Window) {
-	wnd.SetKeyCallback(keyboardCallback)
-	wnd.SetMouseButtonCallback(mouseButtonCallback)
-	wnd.SetCursorPosCallback(mouseMoveCallback)
-	wnd.SetScrollCallback(mouseScrollCallback)
-
-	keyboardListener = make([]KeyboardListener, 0)
-	mouseListener = make([]MouseListener, 0)
-}
-
-func keyboardCallback(wnd *glfw.Window, key glfw.Key, code int, action glfw.Action, mod glfw.ModifierKey) {
-	for _, listener := range keyboardListener {
-		listener.OnKeyEvent(key, code, action, mod)
-	}
-}
-
-func mouseButtonCallback(wnd *glfw.Window, button glfw.MouseButton, action glfw.Action, mod glfw.ModifierKey) {
-	for _, listener := range mouseListener {
-		listener.OnMouseButton(button, action, mod)
-	}
-}
-
-func mouseMoveCallback(wnd *glfw.Window, x float64, y float64) {
-	for _, listener := range mouseListener {
-		listener.OnMouseMove(x, float64(viewportHeight)-y)
-	}
-}
-
-func mouseScrollCallback(wnd *glfw.Window, x float64, y float64) {
-	for _, listener := range mouseListener {
-		listener.OnMouseScroll(x, y)
-	}
-}
-
-// Adds a new keyboard listener.
-func AddKeyboardListener(listener KeyboardListener) {
-	keyboardListener = append(keyboardListener, listener)
-}
-
-// Removes given keyboard listener if found.
-func RemoveKeyboardListener(listener KeyboardListener) {
-	for i, l := range keyboardListener {
-		if l == listener {
-			keyboardListener = append(keyboardListener[:i], keyboardListener[i+1:]...)
-			return
-		}
-	}
-}
-
-// Removes all registered keyboard listeners.
-func RemoveAllKeyboardListener() {
-	keyboardListener = make([]KeyboardListener, 0)
-}
-
-// Adds a new mouse listener.
-func AddMouseListener(listener MouseListener) {
-	mouseListener = append(mouseListener, listener)
-}
-
-// Removes given mouse listener if found.
-func RemoveMouseListener(listener MouseListener) {
-	for i, l := range mouseListener {
-		if l == listener {
-			mouseListener = append(mouseListener[:i], mouseListener[i+1:]...)
-			return
-		}
-	}
-}
-
-// Removes all registered mouse listeners.
-func RemoveAllMouseListener() {
-	mouseListener = make([]MouseListener, 0)
-}

keyframe.go

@@ -1,7 +1,7 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 )
 
 const (
@@ -206,22 +206,22 @@ func (s *KeyframeRenderer) GetName() string {
 // Updates animation state and renders sprites.
 func (s *KeyframeRenderer) Update(delta float64) {
 	// update animation state
-	for _, sprite := range s.sprites {
-		if sprite.KeyframeAnimation == nil {
+	for i := range s.sprites {
+		if s.sprites[i].KeyframeAnimation == nil {
 			continue
 		}
 
-		sprite.Interpolation += delta * sprite.KeyframeAnimation.Speed
+		s.sprites[i].Interpolation += delta * s.sprites[i].KeyframeAnimation.Speed
 
-		if sprite.Interpolation > 1 {
-			sprite.Interpolation = 0
-			sprite.Current++
+		if s.sprites[i].Interpolation > 1 {
+			s.sprites[i].Interpolation = 0
+			s.sprites[i].Current++
 
-			if sprite.Current > sprite.KeyframeAnimation.End {
-				if sprite.KeyframeAnimation.Loop {
-					sprite.Current = sprite.KeyframeAnimation.Start
+			if s.sprites[i].Current > s.sprites[i].KeyframeAnimation.End {
+				if s.sprites[i].KeyframeAnimation.Loop {
+					s.sprites[i].Current = s.sprites[i].KeyframeAnimation.Start
 				} else {
-					sprite.Current = sprite.KeyframeAnimation.End
+					s.sprites[i].Current = s.sprites[i].KeyframeAnimation.End
 				}
 			}
 		}
@@ -233,17 +233,17 @@ func (s *KeyframeRenderer) Update(delta float64) {
 	s.Shader.SendUniform1i(Default_shader_2D_tex, 0)
 	s.vao.Bind()
 
-	for _, sprite := range s.sprites {
-		if !sprite.Visible {
+	for i := range s.sprites {
+		if !s.sprites[i].Visible {
 			continue
 		}
 
-		texCoord := sprite.KeyframeSet.Keyframes[sprite.Current].texCoord
+		texCoord := s.sprites[i].KeyframeSet.Keyframes[s.sprites[i].Current].texCoord
 		texCoord.Bind()
 		texCoord.AttribPointer(s.Shader.GetAttribLocation(Default_shader_2D_texcoord_attrib), 2, gl.FLOAT, false, 0)
 
-		s.Shader.SendMat3(Default_shader_2D_model, *sprite.CalcModel())
-		sprite.Tex.Bind()
+		s.Shader.SendMat3(Default_shader_2D_model, *s.sprites[i].CalcModel())
+		s.sprites[i].Tex.Bind()
 
 		gl.DrawElements(gl.TRIANGLES, 6, gl.UNSIGNED_INT, nil)
 	}

loader.go

@@ -3,7 +3,7 @@ package goga
 import (
 	"bufio"
 	"errors"
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 	"image"
 	"image/draw"
 	"image/png"
@@ -75,13 +75,6 @@ type Ply struct {
 	IndexBuffer, VertexBuffer, TexCoordBuffer, NormalBuffer *VBO
 }
 
-// Loads ply files and creates VBOs within the Ply resource.
-// The indices must be present as triangles.
-// Expected type is float32. If it fails to parse, it will panic.
-type PlyLoader struct {
-	VboUsage uint32
-}
-
 // Drops contained GL buffers.
 func (p *Ply) Drop() {
 	if p.IndexBuffer != nil {
@@ -131,6 +124,13 @@ func (p *Ply) SetExt(ext string) {
 	p.ext = ext
 }
 
+// Loads ply files and creates VBOs within the Ply resource.
+// The indices must be present as triangles.
+// Expected type is float32. If it fails to parse, it will panic.
+type PlyLoader struct {
+	VboUsage uint32
+}
+
 func (p *PlyLoader) Load(file string) (Res, error) {
 	handle, err := os.Open(file)
 	defer handle.Close()

model.go

@@ -1,7 +1,7 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 )
 
 const (
@@ -174,20 +174,20 @@ func (s *ModelRenderer) Update(delta float64) {
 
 	var tid uint32
 
-	for _, model := range s.models {
-		if !model.Visible {
+	for i := range s.models {
+		if !s.models[i].Visible {
 			continue
 		}
 
-		s.Shader.SendMat4(Default_shader_3D_model, *model.CalcModel())
-		model.Vao.Bind()
+		s.Shader.SendMat4(Default_shader_3D_model, *s.models[i].CalcModel())
+		s.models[i].Vao.Bind()
 
 		// prevent texture switching when not neccessary
-		if tid != model.Tex.GetId() {
-			tid = model.Tex.GetId()
-			model.Tex.Bind()
+		if tid != s.models[i].Tex.GetId() {
+			tid = s.models[i].Tex.GetId()
+			s.models[i].Tex.Bind()
 		}
 
-		gl.DrawElements(gl.TRIANGLES, model.Index.Size(), gl.UNSIGNED_INT, nil)
+		gl.DrawElements(gl.TRIANGLES, s.models[i].Index.Size(), gl.UNSIGNED_INT, nil)
 	}
 }

scene.go

@@ -4,11 +4,6 @@ import (
 	"log"
 )
 
-var (
-	scenes      []Scene
-	activeScene Scene
-)
-
 // A scene used to switch between game states.
 // The Cleanup() method is called when a scene is removed
 // or the program is stopped. It can be used to cleanup open resources
@@ -24,6 +19,11 @@ type Scene interface {
 	GetName() string
 }
 
+var (
+	scenes      []Scene
+	activeScene Scene
+)
+
 // Adds a scene to game.
 // Returns false if the scene exists already.
 // The first scene added will be set active.

shader.go

@@ -2,7 +2,7 @@ package goga
 
 import (
 	"errors"
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 	"log"
 	"strings"
 )

sprite.go

@@ -1,7 +1,7 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 )
 
 const (
@@ -140,17 +140,17 @@ func (s *SpriteRenderer) Update(delta float64) {
 	s.vao.Bind()
 	var tid uint32
 
-	for _, sprite := range s.sprites {
-		if !sprite.Visible {
+	for i := range s.sprites {
+		if !s.sprites[i].Visible {
 			continue
 		}
 
-		s.Shader.SendMat3(Default_shader_2D_model, *sprite.CalcModel())
+		s.Shader.SendMat3(Default_shader_2D_model, *s.sprites[i].CalcModel())
 
 		// prevent texture switching when not neccessary
-		if tid != sprite.Tex.GetId() {
-			tid = sprite.Tex.GetId()
-			sprite.Tex.Bind()
+		if tid != s.sprites[i].Tex.GetId() {
+			tid = s.sprites[i].Tex.GetId()
+			s.sprites[i].Tex.Bind()
 		}
 
 		gl.DrawElements(gl.TRIANGLES, 6, gl.UNSIGNED_INT, nil)

system.go

@@ -2,10 +2,6 @@ package goga
 
 import ()
 
-var (
-	systems []System
-)
-
 // A system provides logic for actors satisfying required components.
 // They are automatically updated on each frame.
 // When a system is removed from systems, the Cleanup() method will be called.
@@ -21,6 +17,10 @@ type System interface {
 	GetName() string
 }
 
+var (
+	systems []System
+)
+
 // Adds a system to the game.
 // Returns false if the system exists already.
 func AddSystem(system System) bool {

system_util.go

@@ -1,51 +0,0 @@
-package goga
-
-func GetSpriteRenderer() *SpriteRenderer {
-	renderer, ok := GetSystemByName(sprite_renderer_name).(*SpriteRenderer)
-
-	if !ok {
-		panic("Could not obtain sprite renderer")
-	}
-
-	return renderer
-}
-
-func GetModelRenderer() *ModelRenderer {
-	renderer, ok := GetSystemByName(model_renderer_name).(*ModelRenderer)
-
-	if !ok {
-		panic("Could not obtain model renderer")
-	}
-
-	return renderer
-}
-
-func GetCulling2DSystem() *Culling2D {
-	system, ok := GetSystemByName(culling_2d_name).(*Culling2D)
-
-	if !ok {
-		panic("Could not obtain culling system")
-	}
-
-	return system
-}
-
-func GetKeyframeRenderer() *KeyframeRenderer {
-	renderer, ok := GetSystemByName(keyframe_sprite_renderer_name).(*KeyframeRenderer)
-
-	if !ok {
-		panic("Could not obtain keyframe renderer")
-	}
-
-	return renderer
-}
-
-func GetTextRenderer() *TextRenderer {
-	renderer, ok := GetSystemByName(text_renderer_name).(*TextRenderer)
-
-	if !ok {
-		panic("Could not obtain text renderer")
-	}
-
-	return renderer
-}

tex.go

@@ -1,7 +1,7 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 	"image"
 )
 

text.go

@@ -1,51 +1,69 @@
 package goga
 
+/*
 import (
+	"core"
+	"dp"
 	"encoding/json"
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"geo"
+	"github.com/go-gl/gl/v4.5-core/gl"
 	"io/ioutil"
+	"util"
 )
 
 const (
-	char_padding       = 2
-	text_renderer_name = "textRenderer"
+	char_padding = 2
 )
 
-type character struct {
+// Returns a new renderable text object.
+func NewText(font *Font, text string) *Text {
+	t := &Text{id: core.NextId()}
+	t.text = text
+	t.index = dp.NewVBO(gl.ELEMENT_ARRAY_BUFFER)
+	t.vertex = dp.NewVBO(gl.ARRAY_BUFFER)
+	t.texCoord = dp.NewVBO(gl.ARRAY_BUFFER)
+	t.vao = dp.NewVAO()
+	t.SetText(font, text)
+	t.Size = geo.Vec2{1, 1}
+	t.Scale = geo.Vec2{1, 1}
+	t.Visible = true
+
+	return t
+}
+
+type Character struct {
 	char           byte
-	min, max, size Vec2
+	min, max, size geo.Vec2
 	offset         float64
 }
 
+type Font struct {
+	Tex              *dp.Tex
+	tileSize         float64
+	CharPadding      geo.Vec2
+	Space, Tab, Line float64
+	chars            []Character
+}
+
 type jsonChar struct {
 	Char         string
 	X, Y, Offset float64
 }
 
-// Font represents a texture mapped font.
-// It can be loaded from JSON together with a texture.
-type Font struct {
-	Tex              *Tex
-	tileSize         float64
-	CharPadding      Vec2
-	Space, Tab, Line float64
-	chars            []character
-}
-
-// Creates a new font for given texture.
-// The tile size specifies the size of one character tile on texture.
-// Characters must be added afterwards.
-func NewFont(tex *Tex, tileSize float64) *Font {
-	font := Font{}
+// Creates a new font from texture. Characters must be added afterwards.
+// The characters must be placed within a grid,
+// the second parameter describes the width and height of one tile in pixel.
+func NewFont(tex *dp.Tex, tileSize int) *Font {
+	font := &Font{}
 	font.Tex = tex
-	font.tileSize = tileSize
-	font.CharPadding = Vec2{0.05, 0.05}
+	font.tileSize = float64(tileSize)
+	font.CharPadding = geo.Vec2{0.05, 0.05}
 	font.Space = 0.3
 	font.Tab = 1.2
 	font.Line = 1
-	font.chars = make([]character, 0)
+	font.chars = make([]Character, 0)
 
-	return &font
+	return font
 }
 
 // Loads characters from JSON file.
@@ -64,7 +82,7 @@ func NewFont(tex *Tex, tileSize float64) *Font {
 // Where x and y start in the upper left corner of the texture, both of type int.
 // Offset is optional and can be used to move a character up or down (relative to others).
 // If cut is set to true, the characters will be true typed.
-func (f *Font) FromJson(path string, cut bool) error {
+func (f *Font) LoadFromJson(path string, cut bool) error {
 	// load file content
 	content, err := ioutil.ReadFile(path)
 
@@ -90,22 +108,21 @@ func (f *Font) extractChars(chars []jsonChar, cut bool) {
 			continue
 		}
 
-		var min, max, size Vec2
+		var min, max, size geo.Vec2
 
 		if !cut {
-			min = Vec2{char.X * f.tileSize, char.Y * f.tileSize}
-			max = Vec2{min.X + f.tileSize, min.Y + f.tileSize}
-			size = Vec2{1, 1}
+			min = geo.Vec2{char.X * f.tileSize, char.Y * f.tileSize}
+			max = geo.Vec2{min.X + f.tileSize, min.Y + f.tileSize}
+			size = geo.Vec2{1, 1}
 		} else {
 			min, max, size = f.cutChar(int(char.X), int(char.Y))
 		}
 
-		f.chars = append(f.chars, character{char.Char[0], min, max, size, char.Offset})
+		f.chars = append(f.chars, Character{char.Char[0], min, max, size, char.Offset})
 	}
 }
 
-func (f *Font) cutChar(x, y int) (Vec2, Vec2, Vec2) {
-	// find min/max corners of character on texture
+func (f *Font) cutChar(x, y int) (geo.Vec2, geo.Vec2, geo.Vec2) {
 	minX := int(f.Tex.GetSize().X)
 	minY := int(f.Tex.GetSize().Y)
 	maxX := 0
@@ -134,21 +151,22 @@ func (f *Font) cutChar(x, y int) (Vec2, Vec2, Vec2) {
 		}
 	}
 
-	// add padding
 	minX -= char_padding
 	maxX += char_padding
 	minY -= char_padding
 	maxY += char_padding
 
 	texSize := f.Tex.GetSize()
-	min := Vec2{float64(minX) / texSize.X, float64(maxY) / texSize.Y}
-	max := Vec2{float64(maxX) / texSize.X, float64(minY) / texSize.Y}
-	size := Vec2{float64(maxX-minX) / f.tileSize, float64(maxY-minY) / f.tileSize}
+	min := geo.Vec2{float64(minX) / texSize.X, float64(maxY) / texSize.Y}
+	max := geo.Vec2{float64(maxX) / texSize.X, float64(minY) / texSize.Y}
+
+	// size
+	size := geo.Vec2{float64(maxX-minX) / f.tileSize, float64(maxY-minY) / f.tileSize}
 
 	return min, max, size
 }
 
-func (f *Font) getChar(char byte) *character {
+func (f *Font) getChar(char byte) *Character {
 	for _, character := range f.chars {
 		if character.char == char {
 			return &character
@@ -158,55 +176,30 @@ func (f *Font) getChar(char byte) *character {
 	return nil
 }
 
-// Renderable text component.
-// Use together with Text and create using NewText().
-type TextComponent struct {
-	Color Vec4
+type Text struct {
+	*Actor
+	*Pos2D
 
-	text                    string
-	bounds                  Vec2
-	index, vertex, texCoord *VBO
-	vao                     *VAO
+	id     int
+	text   string
+	bounds geo.Vec2
+
+	index, vertex, texCoord *dp.VBO
+	vao                     *dp.VAO
 }
 
-// Deletes GL buffers bound to this text component.
-func (t *TextComponent) Drop() {
+// Deletes GL buffers bound to this text.
+func (t *Text) Drop() {
 	t.index.Drop()
 	t.vertex.Drop()
 	t.texCoord.Drop()
 	t.vao.Drop()
 }
 
-// Text is an actor representing text rendered as texture mapped font.
-// Each Text has a position and its own buffers.
-type Text struct {
-	*Actor
-	*Pos2D
-	*TextComponent
-}
-
-// Returns a new renderable text object.
-func NewText(font *Font, textStr string) *Text {
-	text := Text{}
-	text.Actor = NewActor()
-	text.Pos2D = NewPos2D()
-	text.TextComponent = &TextComponent{}
-	text.index = NewVBO(gl.ELEMENT_ARRAY_BUFFER)
-	text.vertex = NewVBO(gl.ARRAY_BUFFER)
-	text.texCoord = NewVBO(gl.ARRAY_BUFFER)
-	text.vao = NewVAO()
-	text.SetText(font, textStr)
-	text.Color = Vec4{1, 1, 1, 1}
-	text.Size = Vec2{1, 1}
-	text.Scale = Vec2{1, 1}
-	text.Visible = true
-
-	return &text
-}
-
 // Sets the given string as text and (re)creates buffers.
 func (t *Text) SetText(font *Font, text string) {
 	t.text = text
+
 	indices := make([]uint32, len(text)*6)
 	vertices := make([]float32, len(text)*8)
 	texCoords := make([]float32, len(text)*8)
@@ -228,7 +221,7 @@ func (t *Text) SetText(font *Font, text string) {
 
 	// create vertices/texCoords
 	index = 0
-	offset := Vec2{}
+	offset := geo.Vec2{}
 	var width, height float64
 
 	for i := 0; i < len(text)*8 && int(index) < len(text); i += 8 {
@@ -292,14 +285,18 @@ func (t *Text) SetText(font *Font, text string) {
 		}
 	}
 
-	t.bounds = Vec2{width, height}
+	t.bounds = geo.Vec2{width, height}
 
 	// fill GL buffer
 	t.index.Fill(gl.Ptr(indices[:chars*6]), 4, chars*6, gl.STATIC_DRAW)
 	t.vertex.Fill(gl.Ptr(vertices[:chars*8]), 4, chars*8, gl.STATIC_DRAW)
 	t.texCoord.Fill(gl.Ptr(texCoords[:chars*8]), 4, chars*8, gl.STATIC_DRAW)
 
-	CheckGLError()
+	util.CheckGLError()
+}
+
+func (t *Text) GetId() int {
+	return t.id
 }
 
 // Returns the text as string.
@@ -308,130 +305,98 @@ func (t *Text) GetText() string {
 }
 
 // Returns bounds of text, which is the size of characters.
-func (t *Text) GetBounds() Vec2 {
-	return Vec2{t.bounds.X * t.Size.X * t.Scale.X, t.bounds.Y * t.Size.Y * t.Scale.Y}
+func (t *Text) GetBounds() geo.Vec2 {
+	return geo.Vec2{t.bounds.X * t.Size.X * t.Scale.X, t.bounds.Y * t.Size.Y * t.Scale.Y}
 }
 
-// The text renderer is a system rendering 2D texture mapped font.
-// It has a 2D position component, to move all texts at once.
 type TextRenderer struct {
 	Pos2D
 
-	Shader *Shader
+	Shader *dp.Shader
 	Camera *Camera
 	Font   *Font
-	texts  []Text
+	Color  geo.Vec4
+	texts  []*Text
 }
 
 // Creates a new text renderer using given shader, camera and font.
 // If shader and/or camera are nil, the default one will be used.
-func NewTextRenderer(shader *Shader, camera *Camera, font *Font) *TextRenderer {
-	if shader == nil {
-		shader = DefaultTextShader
-	}
-
-	if camera == nil {
-		camera = DefaultCamera
-	}
-
+func NewTextRenderer(shader *dp.Shader, camera *Camera, font *Font) *TextRenderer {
 	renderer := &TextRenderer{}
 	renderer.Shader = shader
 	renderer.Camera = camera
 	renderer.Font = font
-	renderer.texts = make([]Text, 0)
-	renderer.Size = Vec2{1, 1}
-	renderer.Scale = Vec2{1, 1}
+	renderer.Color = geo.Vec4{1, 1, 1, 1}
+	renderer.texts = make([]*Text, 0)
+	renderer.Size = geo.Vec2{1, 1}
+	renderer.Scale = geo.Vec2{1, 1}
 
 	return renderer
 }
 
-// Prepares given text for rendering.
+// Prepares a text for rendering.
 func (r *TextRenderer) Prepare(text *Text) {
-	text.vao = NewVAO()
+	text.vao = dp.NewVAO()
 	text.vao.Bind()
 	r.Shader.EnableVertexAttribArrays()
 	text.index.Bind()
 	text.vertex.Bind()
-	text.vertex.AttribPointer(r.Shader.GetAttribLocation(Default_shader_text_vertex_attrib), 2, gl.FLOAT, false, 0)
+	text.vertex.AttribPointer(r.Shader.GetAttribLocation(TEXTRENDERER_VERTEX_ATTRIB), 2, gl.FLOAT, false, 0)
 	text.texCoord.Bind()
-	text.texCoord.AttribPointer(r.Shader.GetAttribLocation(Default_shader_text_texcoord_attrib), 2, gl.FLOAT, false, 0)
+	text.texCoord.AttribPointer(r.Shader.GetAttribLocation(TEXTRENDERER_TEXCOORD_ATTRIB), 2, gl.FLOAT, false, 0)
 	text.vao.Unbind()
 }
 
-// Frees recources created by text component.
-// This is called automatically when system gets removed.
-func (r *TextRenderer) Cleanup() {
-	for _, text := range r.texts {
-		text.Drop()
-	}
+// Adds text to the renderer.
+func (r *TextRenderer) Add(text *Text) {
+	r.texts = append(r.texts, text)
 }
 
-// Adds text to the renderer.
-func (r *TextRenderer) Add(actor *Actor, pos *Pos2D, text *TextComponent) bool {
-	id := actor.GetId()
-
+// Returns text by ID.
+func (r *TextRenderer) Get(id int) *Text {
 	for _, text := range r.texts {
-		if id == text.Actor.GetId() {
-			return false
+		if text.GetId() == id {
+			return text
 		}
 	}
 
-	r.texts = append(r.texts, Text{actor, pos, text})
-
-	return true
-}
-
-// Removes text from renderer.
-func (r *TextRenderer) Remove(actor *Actor) bool {
-	return r.RemoveById(actor.GetId())
+	return nil
 }
 
 // Removes text from renderer by ID.
-func (r *TextRenderer) RemoveById(id ActorId) bool {
+func (r *TextRenderer) Remove(id int) *Text {
 	for i, text := range r.texts {
-		if text.Actor.GetId() == id {
+		if text.GetId() == id {
 			r.texts = append(r.texts[:i], r.texts[i+1:]...)
-			return true
+			return text
 		}
 	}
 
-	return false
+	return nil
 }
 
-// Removes all texts.
-func (r *TextRenderer) RemoveAll() {
-	r.texts = make([]Text, 0)
+// Removes all sprites.
+func (r *TextRenderer) Clear() {
+	r.texts = make([]*Text, 0)
 }
 
-// Returns number of texts.
-func (r *TextRenderer) Len() int {
-	return len(r.texts)
-}
-
-func (r *TextRenderer) GetName() string {
-	return text_renderer_name
-}
-
-// Renders texts.
-func (r *TextRenderer) Update(delta float64) {
-	if r.Font == nil {
-		return
-	}
-
+// Renders sprites.
+func (r *TextRenderer) Render() {
 	r.Shader.Bind()
-	r.Shader.SendMat3(Default_shader_text_ortho, *MultMat3(r.Camera.CalcOrtho(), r.CalcModel()))
-	r.Shader.SendUniform1i(Default_shader_text_tex, 0)
+	r.Shader.SendMat3(TEXTRENDERER_ORTHO, *geo.MultMat3(r.Camera.CalcOrtho(), r.CalcModel()))
+	r.Shader.SendUniform1i(TEXTRENDERER_TEX, 0)
+	r.Shader.SendUniform4f(TEXTRENDERER_COLOR, float32(r.Color.X), float32(r.Color.Y), float32(r.Color.Z), float32(r.Color.W))
 	r.Font.Tex.Bind()
 
-	for _, text := range r.texts {
-		if !text.Visible {
+	for i := range r.texts {
+		if !r.texts[i].Visible {
 			continue
 		}
 
-		text.vao.Bind()
-		r.Shader.SendUniform4f(Default_shader_text_color, float32(text.Color.X), float32(text.Color.Y), float32(text.Color.Z), float32(text.Color.W))
-		r.Shader.SendMat3(Default_shader_text_model, *text.CalcModel())
+		r.texts[i].vao.Bind()
+		r.Shader.SendMat3(TEXTRENDERER_MODEL, *r.texts[i].CalcModel())
 
-		gl.DrawElements(gl.TRIANGLES, text.index.Size(), gl.UNSIGNED_INT, nil)
+		gl.DrawElements(gl.TRIANGLES, r.texts[i].index.Size(), gl.UNSIGNED_INT, nil)
 	}
 }
+*/

vao.go

@@ -1,7 +1,7 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 )
 
 // Vertex Array Object.

vbo.go

@@ -1,7 +1,7 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v3.2-core/gl"
+	"github.com/go-gl/gl/v4.5-core/gl"
 	"unsafe"
 )