Set GL version to 3.1 (lowest possible version), fixed cleanup bug when calling Stop(), added input handling.

CHANGELOG.md

@@ -0,0 +1,5 @@
+# Changelog
+
+## 0.1_beta
+
+* beta release

README.md

@@ -1,14 +1,13 @@
 # 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/v4.5-core/gl
+go get github.com/go-gl/gl/v3.1-core/gl
 go get github.com/go-gl/glfw/v3.1/glfw
 go get github.com/DeKugelschieber/go-game
 ```
@@ -17,18 +16,16 @@ 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
-    - 4.5-core
+    - 3.1-core
 * https://github.com/go-gl/glfw
     - 3.1
 
-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.
+To use a different GL version, you need to replace the GL imports in package goga.
 
 ## Contribute
 

ToDo.md

@@ -5,6 +5,6 @@
 * ~~limit FPS~~
     - does this really work?
 * ~~fullscreen~~
-* simple access to default resources like GetTex()
+* ~~simple access to default resources like GetTex()~~
 * ~~text rendering + font loading~~
 * more options for GLFW

actor.go

@@ -1,7 +1,5 @@
 package goga
 
-import ()
-
 // An actor ID is a unique integer,
 // which can be used to reference an actor.
 type ActorId uint64

demo/input/input.go

@@ -0,0 +1,87 @@
+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, ok := goga.GetSystemByName("spriteRenderer").(*goga.SpriteRenderer)
+
+	if !ok {
+		panic("Could not find renderer")
+	}
+
+	renderer.Add(sprite.Actor, sprite.Pos2D, sprite.Tex)
+
+	culling, ok := goga.GetSystemByName("culling2d").(*goga.Culling2D)
+
+	if !ok {
+		panic("Could not find culling")
+	}
+
+	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/text/text.go

@@ -2,7 +2,7 @@ package main
 
 import (
 	"github.com/DeKugelschieber/go-game"
-	"github.com/go-gl/gl/v4.5-core/gl"
+	"github.com/go-gl/gl/v3.2-core/gl"
 )
 
 const (

fbo.go

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

game.go

@@ -1,7 +1,7 @@
 package goga
 
 import (
-	"github.com/go-gl/gl/v4.5-core/gl"
+	"github.com/go-gl/gl/v3.2-core/gl"
 	"github.com/go-gl/glfw/v3.2/glfw"
 	"log"
 	"math"
@@ -58,7 +58,8 @@ var (
 )
 
 func init() {
-	// GL functions must be called from main thread.
+	// GL functions must be called from main thread,
+	// so we disable multithreading by the runtime here.
 	log.Print("Locking OS thread")
 	runtime.LockOSThread()
 }
@@ -154,6 +155,8 @@ func Run(game Game, options *RunOptions) {
 		}
 	})
 
+	initInput(wnd)
+
 	// make GL context current
 	wnd.MakeContextCurrent()
 
@@ -178,8 +181,8 @@ func Run(game Game, options *RunOptions) {
 	delta := time.Duration(0)
 	var deltaSec float64
 
-	for running {
-		if exitOnClose && wnd.ShouldClose() {
+	for true {
+		if !running || exitOnClose && wnd.ShouldClose() {
 			cleanup()
 			return
 		}

gl_util.go

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

input.go

@@ -0,0 +1,98 @@
+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/v4.5-core/gl"
+	"github.com/go-gl/gl/v3.2-core/gl"
 )
 
 const (

loader.go

@@ -3,7 +3,7 @@ package goga
 import (
 	"bufio"
 	"errors"
-	"github.com/go-gl/gl/v4.5-core/gl"
+	"github.com/go-gl/gl/v3.2-core/gl"
 	"image"
 	"image/draw"
 	"image/png"

model.go

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

shader.go

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

sprite.go

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

tex.go

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

text.go

@@ -2,7 +2,7 @@ package goga
 
 import (
 	"encoding/json"
-	"github.com/go-gl/gl/v4.5-core/gl"
+	"github.com/go-gl/gl/v3.2-core/gl"
 	"io/ioutil"
 )
 

vao.go

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

vbo.go

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