More code restructuring and system access functions.

demo/input/input.go

@@ -33,20 +33,10 @@ func (g *Game) Setup() {
 	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 := goga.GetSpriteRenderer()
 	renderer.Add(sprite.Actor, sprite.Pos2D, sprite.Tex)
 
-	culling, ok := goga.GetSystemByName("culling2d").(*goga.Culling2D)
-
-	if !ok {
-		panic("Could not find culling")
-	}
-
+	culling := goga.GetCulling2DSystem()
 	culling.Add(sprite.Actor, sprite.Pos2D)
 
 	// register input listeners

demo/keyframe/keyframe.go

@@ -39,12 +39,7 @@ func (g *Game) Setup() {
 	sprite.KeyframeAnimation = goga.NewKeyframeAnimation(0, 7, true, 20)
 
 	// add to renderer
-	renderer, ok := goga.GetSystemByName("keyframeRenderer").(*goga.KeyframeRenderer)
-
-	if !ok {
-		panic("Could not find renderer")
-	}
-
+	renderer := goga.GetKeyframeRenderer()
 	renderer.Add(sprite.Actor, sprite.Pos2D, sprite.Tex, sprite.KeyframeSet, sprite.KeyframeAnimation)
 }
 

demo/model/model.go

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

demo/sprite/sprite.go

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

demo/text/text.go

@@ -45,12 +45,7 @@ func (g *Game) Setup() {
 	}
 
 	// setup renderer
-	renderer, ok := goga.GetSystemByName("textRenderer").(*goga.TextRenderer)
-
-	if !ok {
-		panic("Could not find renderer")
-	}
-
+	renderer := goga.GetTextRenderer()
 	renderer.Font = font
 
 	// create and add text