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

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)
+}