scene rendering now works

* scene systems now render their objects to the main viewport
* added SegmentedSprite component
* added SegmentedSprite to sprite factory

d2core/d2components/all_component_ids.go

@@ -36,4 +36,5 @@ const (
 	SizeCID
 	AnimationCID
 	ScaleCID
+	SegmentedSpriteCID
 )

d2core/d2components/renderable.go

@@ -19,7 +19,7 @@ type RenderableComponent struct {
 	d2interface.Surface
 }
 
-// RenderableMap is a map of entity ID's to Surface
+// RenderableMap is a map of entity ID's to Renderable
 type RenderableMap struct {
 	*akara.BaseComponentMap
 }
@@ -41,8 +41,8 @@ func (cm *RenderableMap) GetRenderable(id akara.EID) (*RenderableComponent, bool
 	return entry.(*RenderableComponent), found
 }
 
-// Surface is a convenient reference to be used as a component identifier
-var Surface = newRenderable() // nolint:gochecknoglobals // global by design
+// Renderable is a convenient reference to be used as a component identifier
+var Renderable = newRenderable() // nolint:gochecknoglobals // global by design
 
 func newRenderable() akara.Component {
 	return &RenderableComponent{

d2core/d2components/segmented_sprite.go

@@ -0,0 +1,67 @@
+//nolint:dupl,golint,stylecheck // component declarations are supposed to look the same
+package d2components
+
+import (
+	"github.com/gravestench/akara"
+)
+
+// static check that SegmentedSpriteComponent implements Component
+var _ akara.Component = &SegmentedSpriteComponent{}
+
+// static check that SegmentedSpriteMap implements ComponentMap
+var _ akara.ComponentMap = &SegmentedSpriteMap{}
+
+// SegmentedSpriteComponent represents an entities x,y axis scale as a vector
+type SegmentedSpriteComponent struct {
+	*akara.BaseComponent
+	Xsegments   int
+	Ysegments   int
+	FrameOffset int
+}
+
+// SegmentedSpriteMap is a map of entity ID's to SegmentedSprite
+type SegmentedSpriteMap struct {
+	*akara.BaseComponentMap
+}
+
+// AddSegmentedSprite adds a new SegmentedSpriteComponent for the given entity id and returns it.
+// this is a convenience method for the generic Add method, as it returns a
+// *SegmentedSpriteComponent instead of an akara.Component
+func (cm *SegmentedSpriteMap) AddSegmentedSprite(id akara.EID) *SegmentedSpriteComponent {
+	c := cm.Add(id).(*SegmentedSpriteComponent)
+
+	c.Xsegments = 1
+	c.Ysegments = 1
+
+	return c
+}
+
+// GetSegmentedSprite returns the SegmentedSpriteComponent associated with the given entity id
+func (cm *SegmentedSpriteMap) GetSegmentedSprite(id akara.EID) (*SegmentedSpriteComponent, bool) {
+	entry, found := cm.Get(id)
+	if entry == nil {
+		return nil, false
+	}
+
+	return entry.(*SegmentedSpriteComponent), found
+}
+
+// SegmentedSprite is a convenient reference to be used as a component identifier
+var SegmentedSprite = newSegmentedSprite() // nolint:gochecknoglobals // global by design
+
+func newSegmentedSprite() akara.Component {
+	return &SegmentedSpriteComponent{
+		BaseComponent: akara.NewBaseComponent(SegmentedSpriteCID, newSegmentedSprite, newSegmentedSpriteMap),
+	}
+}
+
+func newSegmentedSpriteMap() akara.ComponentMap {
+	baseComponent := akara.NewBaseComponent(SegmentedSpriteCID, newSegmentedSprite, newSegmentedSpriteMap)
+	baseMap := akara.NewBaseComponentMap(baseComponent)
+
+	cm := &SegmentedSpriteMap{
+		BaseComponentMap: baseMap,
+	}
+
+	return cm
+}

d2core/d2systems/render.go

@@ -25,7 +25,7 @@ func NewRenderSystem() *RenderSystem {
 	viewports := akara.NewFilter().
 		Require(d2components.Viewport).
 		Require(d2components.MainViewport).
-		Require(d2components.Surface).
+		Require(d2components.Renderable).
 		Build()
 
 	gameConfigs := akara.NewFilter().Require(d2components.GameConfig).Build()
@@ -73,7 +73,7 @@ func (m *RenderSystem) Init(_ *akara.World) {
 	m.GameConfigMap = m.InjectMap(d2components.GameConfig).(*d2components.GameConfigMap)
 	m.ViewportMap = m.InjectMap(d2components.Viewport).(*d2components.ViewportMap)
 	m.MainViewportMap = m.InjectMap(d2components.MainViewport).(*d2components.MainViewportMap)
-	m.RenderableMap = m.InjectMap(d2components.Surface).(*d2components.RenderableMap)
+	m.RenderableMap = m.InjectMap(d2components.Renderable).(*d2components.RenderableMap)
 }
 
 // Update will initialize the renderer, start the game loop, and
@@ -156,17 +156,17 @@ func (m *RenderSystem) render(screen d2interface.Surface) error {
 			return errors.New("main viewport not found")
 		}
 
-		sfc, found := m.GetRenderable(id)
+		renderable, found := m.GetRenderable(id)
 		if !found {
 			return errors.New("main viewport doesn't have a surface")
 		}
 
-		if sfc.Surface == nil {
-			sfc.Surface = m.renderer.NewSurface(vp.Width, vp.Height)
+		if renderable.Surface == nil {
+			renderable.Surface = m.renderer.NewSurface(vp.Width, vp.Height)
 		}
 
 		screen.PushTranslation(vp.Left, vp.Top)
-		screen.Render(sfc.Surface)
+		screen.Render(renderable.Surface)
 		screen.Pop()
 	}
 

d2core/d2systems/scene_base.go

@@ -3,6 +3,8 @@ package d2systems
 import (
 	"path/filepath"
 
+	"github.com/OpenDiablo2/OpenDiablo2/d2common/d2math"
+
 	"github.com/gravestench/akara"
 
 	"github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
@@ -128,7 +130,7 @@ func (s *BaseScene) injectComponentMaps() {
 	s.ViewportMap = s.World.InjectMap(d2components.Viewport).(*d2components.ViewportMap)
 	s.ViewportFilterMap = s.World.InjectMap(d2components.ViewportFilter).(*d2components.ViewportFilterMap)
 	s.CameraMap = s.World.InjectMap(d2components.Camera).(*d2components.CameraMap)
-	s.RenderableMap = s.World.InjectMap(d2components.Surface).(*d2components.RenderableMap)
+	s.RenderableMap = s.World.InjectMap(d2components.Renderable).(*d2components.RenderableMap)
 	s.PositionMap = s.World.InjectMap(d2components.Position).(*d2components.PositionMap)
 	s.ScaleMap = s.World.InjectMap(d2components.Scale).(*d2components.ScaleMap)
 	s.AnimationMap = s.World.InjectMap(d2components.Animation).(*d2components.AnimationMap)
@@ -240,9 +242,9 @@ func (s *BaseScene) renderViewport(idx int, objects []akara.EID) {
 		sfc.Surface = s.systems.renderer.NewSurface(camera.Width, camera.Height)
 	}
 
-	cx, cy := int(camera.X())+camera.Width>>1, int(camera.Y())+camera.Height>>1
+	cx, cy := int(camera.X()), int(camera.Y())
 
-	sfc.Surface.PushTranslation(-cx, -cy) // negative because we're offsetting everything that gets rendered
+	sfc.Surface.PushTranslation(cx, cy) // negative because we're offsetting everything that gets rendered
 	sfc.Surface.PushScale(camera.Zoom, camera.Zoom)
 
 	for _, object := range objects {
@@ -254,7 +256,7 @@ func (s *BaseScene) renderViewport(idx int, objects []akara.EID) {
 }
 
 func (s *BaseScene) renderObject(target d2interface.Surface, id akara.EID) {
-	sfc, found := s.GetRenderable(id)
+	renderable, found := s.GetRenderable(id)
 	if !found {
 		return
 	}
@@ -269,13 +271,51 @@ func (s *BaseScene) renderObject(target d2interface.Surface, id akara.EID) {
 		scale = s.AddScale(id)
 	}
 
-	sfc.PushTranslation(int(position.X()), int(position.Y()))
-	sfc.PushScale(scale.X(), scale.Y())
+	x, y := int(position.X()), int(position.Y())
 
-	target.Render(sfc.Surface)
+	target.PushTranslation(x, y)
+	defer target.Pop()
 
-	sfc.Pop()
-	sfc.Pop()
+	target.PushScale(scale.X(), scale.Y())
+	defer target.Pop()
+
+	segment, found := s.systems.SpriteFactory.GetSegmentedSprite(id)
+	if found {
+		animation, found := s.GetAnimation(id)
+		if !found {
+			return
+		}
+
+		var offsetY int
+
+		segmentsX, segmentsY := segment.Xsegments, segment.Ysegments
+		frameOffset := segment.FrameOffset
+
+		for y := 0; y < segmentsY; y++ {
+			var offsetX, maxFrameHeight int
+
+			for x := 0; x < segmentsX; x++ {
+				idx := x + y*segmentsX + frameOffset*segmentsX*segmentsY
+				if err := animation.SetCurrentFrame(idx); err != nil {
+					s.Error("SetCurrentFrame error" + err.Error())
+				}
+
+				target.PushTranslation(x+offsetX, y+offsetY)
+				target.Render(animation.GetCurrentFrameSurface())
+				target.Pop()
+
+				frameWidth, frameHeight := animation.GetCurrentFrameSize()
+				maxFrameHeight = d2math.MaxInt(maxFrameHeight, frameHeight)
+				offsetX += frameWidth - 1
+			}
+
+			offsetY += maxFrameHeight - 1
+		}
+
+		return
+	}
+
+	target.Render(renderable.Surface)
 }
 
 // responsible for wrapping the object factory calls and assigning the created object entity id's to the scene
@@ -291,3 +331,12 @@ func (s *sceneObjectAssigner) Sprite(x, y float64, imgPath, palPath string) akar
 
 	return eid
 }
+
+func (s *sceneObjectAssigner) SegmentedSprite(x, y float64, imgPath, palPath string, xseg, yseg, frame int) akara.EID {
+	s.Infof("creating segmented sprite: %s, %s", filepath.Base(imgPath), palPath)
+
+	eid := s.systems.SpriteFactory.SegmentedSprite(x, y, imgPath, palPath, xseg, yseg, frame)
+	s.GameObjects = append(s.GameObjects, eid)
+
+	return eid
+}

d2core/d2systems/scene_main_menu.go

@@ -41,16 +41,16 @@ func (s *MainMenuScene) boot() {
 		return
 	}
 
-	s.createBackground()
-	s.createButtons()
 	s.createTrademarkScreen()
+	s.createButtons()
+	s.createBackground()
 
 	s.booted = true
 }
 
 func (s *MainMenuScene) createBackground() {
 	s.Info("creating background")
-	s.Add.Sprite(0, 0, d2resource.GameSelectScreen, d2resource.PaletteSky)
+	s.Add.SegmentedSprite(0, 0, d2resource.GameSelectScreen, d2resource.PaletteSky, 4, 3, 0)
 }
 
 func (s *MainMenuScene) createButtons() {
@@ -59,7 +59,7 @@ func (s *MainMenuScene) createButtons() {
 
 func (s *MainMenuScene) createTrademarkScreen() {
 	s.Info("creating trademark screen")
-	s.Add.Sprite(0, 0, d2resource.TrademarkScreen, d2resource.PaletteSky)
+	s.Add.SegmentedSprite(0, 0, d2resource.TrademarkScreen, d2resource.PaletteSky, 4, 3, 0)
 }
 
 // Update the main menu scene

d2core/d2systems/sprite_factory.go

@@ -18,11 +18,16 @@ const (
 func NewSpriteFactorySubsystem(b *akara.BaseSystem, l *d2util.Logger) *SpriteFactory {
 	spritesToRender := akara.NewFilter().
 		Require(d2components.Animation). // we want to process entities that have an animation ...
-		Forbid(d2components.Surface).    // ... but are missing a surface
+		Forbid(d2components.Renderable). // ... but are missing a surface
+		Build()
+
+	spritesToUpdate := akara.NewFilter().
+		Require(d2components.Animation).  // we want to process entities that have an animation ...
+		Require(d2components.Renderable). // ... but are missing a surface
 		Build()
 
 	sys := &SpriteFactory{
-		BaseSubscriberSystem: akara.NewBaseSubscriberSystem(spritesToRender),
+		BaseSubscriberSystem: akara.NewBaseSubscriberSystem(spritesToRender, spritesToUpdate),
 		Logger:               l,
 	}
 
@@ -52,8 +57,10 @@ type SpriteFactory struct {
 	*d2components.PaletteMap
 	*d2components.AnimationMap
 	*d2components.RenderableMap
+	*d2components.SegmentedSpriteMap
 	loadQueue       spriteLoadQueue
 	spritesToRender *akara.Subscription
+	spritesToUpdate *akara.Subscription
 }
 
 // Init the sprite factory, injecting the necessary components
@@ -63,6 +70,7 @@ func (t *SpriteFactory) Init(world *akara.World) {
 	t.loadQueue = make(spriteLoadQueue)
 
 	t.spritesToRender = t.Subscriptions[0]
+	t.spritesToUpdate = t.Subscriptions[1]
 
 	t.FilePathMap = t.InjectMap(d2components.FilePath).(*d2components.FilePathMap)
 	t.PositionMap = t.InjectMap(d2components.Position).(*d2components.PositionMap)
@@ -70,12 +78,17 @@ func (t *SpriteFactory) Init(world *akara.World) {
 	t.DccMap = t.InjectMap(d2components.Dcc).(*d2components.DccMap)
 	t.PaletteMap = t.InjectMap(d2components.Palette).(*d2components.PaletteMap)
 	t.AnimationMap = t.InjectMap(d2components.Animation).(*d2components.AnimationMap)
-	t.RenderableMap = t.InjectMap(d2components.Surface).(*d2components.RenderableMap)
+	t.RenderableMap = t.InjectMap(d2components.Renderable).(*d2components.RenderableMap)
+	t.SegmentedSpriteMap = t.InjectMap(d2components.SegmentedSprite).(*d2components.SegmentedSpriteMap)
 }
 
 // Update processes the load queue which attempting to create animations, as well as
 // binding existing animations to a renderer if one is present.
 func (t *SpriteFactory) Update() {
+	for _, eid := range t.spritesToUpdate.GetEntities() {
+		t.updateSprite(eid)
+	}
+
 	for _, eid := range t.spritesToRender.GetEntities() {
 		t.tryRenderingSprite(eid)
 	}
@@ -103,6 +116,19 @@ func (t *SpriteFactory) Sprite(x, y float64, imgPath, palPath string) akara.EID
 	return spriteID
 }
 
+// SegmentedSprite queues a segmented sprite animation to be loaded.
+// A segmented sprite is a sprite that has many frames that form the entire sprite.
+func (t *SpriteFactory) SegmentedSprite(x, y float64, imgPath, palPath string, xseg, yseg, frame int) akara.EID {
+	spriteID := t.Sprite(x, y, imgPath, palPath)
+
+	s := t.AddSegmentedSprite(spriteID)
+	s.Xsegments = xseg
+	s.Ysegments = yseg
+	s.FrameOffset = frame
+
+	return spriteID
+}
+
 func (t *SpriteFactory) tryCreatingAnimation(id akara.EID) {
 	entry := t.loadQueue[id]
 	imageID, paletteID := entry.spriteImage, entry.spritePalette
@@ -172,6 +198,32 @@ func (t *SpriteFactory) tryRenderingSprite(eid akara.EID) {
 	t.AddRenderable(eid).Surface = sfc
 }
 
+func (t *SpriteFactory) updateSprite(eid akara.EID) {
+	if t.RenderSystem == nil {
+		return
+	}
+
+	if t.RenderSystem.renderer == nil {
+		return
+	}
+
+	anim, found := t.GetAnimation(eid)
+	if !found {
+		return
+	}
+
+	if anim.Animation == nil {
+		return
+	}
+
+	renderable, found := t.GetRenderable(eid)
+	if !found {
+		return
+	}
+
+	renderable.Surface = anim.GetCurrentFrameSurface()
+}
+
 func (t *SpriteFactory) createDc6Animation(
 	dc6 *d2components.Dc6Component,
 	pal *d2components.PaletteComponent,