func (cs *CollisionSystem) Update(entity *ecs.Entity, dt float32) {
var (
space *SpaceComponent
collision *CollisionComponent
ok bool
)
if space, ok = entity.ComponentFast(space).(*SpaceComponent); !ok {
return
}
if collision, ok = entity.ComponentFast(collision).(*CollisionComponent); !ok {
return
}
if !collision.Main {
return
}
var (
otherSpace *SpaceComponent
otherCollision *CollisionComponent
)
for _, other := range cs.Entities() {
if other.ID() != entity.ID() {
if otherSpace, ok = other.ComponentFast(otherSpace).(*SpaceComponent); !ok {
return
}
if otherCollision, ok = other.ComponentFast(otherCollision).(*CollisionComponent); !ok {
return
}
entityAABB := space.AABB()
offset := Point{collision.Extra.X / 2, collision.Extra.Y / 2}
entityAABB.Min.X -= offset.X
entityAABB.Min.Y -= offset.Y
entityAABB.Max.X += offset.X
entityAABB.Max.Y += offset.Y
otherAABB := otherSpace.AABB()
offset = Point{otherCollision.Extra.X / 2, otherCollision.Extra.Y / 2}
otherAABB.Min.X -= offset.X
otherAABB.Min.Y -= offset.Y
otherAABB.Max.X += offset.X
otherAABB.Max.Y += offset.Y
if IsIntersecting(entityAABB, otherAABB) {
if otherCollision.Solid && collision.Solid {
mtd := MinimumTranslation(entityAABB, otherAABB)
space.Position.X += mtd.X
space.Position.Y += mtd.Y
}
Mailbox.Dispatch(CollisionMessage{Entity: entity, To: other})
}
}
}
}
func (as *AudioSystem) Update(entity *ecs.Entity, dt float32) {
var ac *AudioComponent
var ok bool
if ac, ok = entity.ComponentFast(ac).(*AudioComponent); !ok {
return
}
if ac.player == nil {
f := Files.Sound(ac.File)
if f == nil {
return
}
var err error
ac.player, err = NewPlayer(f, 0, 0)
if err != nil {
log.Println("Error initializing AudioSystem:", err)
return
}
}
if ac.player.State() != Playing {
if ac.player.State() == Stopped {
if !ac.Repeat {
al.RewindSources(ac.player.source)
al.StopSources(ac.player.source)
entity.RemoveComponent(ac)
return
}
}
// Prepares if the track hasn't been buffered before.
if err := ac.player.prepare(ac.Background, 0, false); err != nil {
log.Println("Error initializing AudioSystem:", err)
return
}
al.PlaySources(ac.player.source)
if !ac.Background {
var space *SpaceComponent
var ok bool
if space, ok = entity.ComponentFast(space).(*SpaceComponent); !ok {
return
}
ac.player.source.SetPosition(al.Vector{
(space.Position.X + space.Width/2) / Width(),
(space.Position.Y + space.Height/2) / Height(),
0})
}
}
}
func (rs *RenderSystem) Update(entity *ecs.Entity, dt float32) {
if !rs.changed {
return
}
var render *RenderComponent
var ok bool
if render, ok = entity.ComponentFast(render).(*RenderComponent); !ok {
return
}
rs.renders[render.priority] = append(rs.renders[render.priority], entity)
}
func (c *Calibrate) Update(entity *ecs.Entity, dt float32) {
if c.frameIndex != 0 {
return
}
var (
cal *CalibrateComponent
ok bool
)
if cal, ok = entity.ComponentFast(cal).(*CalibrateComponent); !ok {
return
}
// Render the image again
plt, err := plot.New()
if err != nil {
log.Fatal(err)
}
plotutil.AddLinePoints(plt,
"CH"+strconv.Itoa(int(cal.ChannelIndex)), plotter.XYer(c.channels[cal.ChannelIndex]))
img := image.NewRGBA(image.Rect(0, 0, 3*dpi, 3*dpi))
canv := vgimg.NewWith(vgimg.UseImage(img))
plt.Draw(draw.New(canv))
bgTexture := engi.NewImageRGBA(img)
// Give it to engi
erender := &engi.RenderComponent{
Display: engi.NewRegion(engi.NewTexture(bgTexture), 0, 0, 3*dpi, 3*dpi),
Scale: engi.Point{1, 1},
Transparency: 1,
Color: color.RGBA{255, 255, 255, 255},
}
erender.SetPriority(engi.HUDGround)
entity.AddComponent(erender)
}
func (m *Maze) Update(entity *ecs.Entity, dt float32) {
if entity.ID() != m.playerEntity.ID() {
return
}
var (
move *MovementComponent
ok bool
)
if move, ok = entity.ComponentFast(move).(*MovementComponent); ok {
return // because we're still moving!
}
if m.currentLevel.Width == 0 || m.currentLevel.Height == 0 {
return // because there's no maze
}
oldX, oldY := m.currentLevel.PlayerX, m.currentLevel.PlayerY
if m.currentLevel.Grid[oldY][oldX] == TileGoal {
// Goal achieved!
if strings.HasPrefix(m.currentLevel.Name, "Random ") {
engi.Mailbox.Dispatch(MazeMessage{})
return
}
if m.sequence != SequenceNone {
m.cleanup()
m.initialize("")
return
}
}
switch m.Controller.Action(m.currentLevel) {
case ActionUp:
m.currentLevel.PlayerY--
case ActionDown:
m.currentLevel.PlayerY++
case ActionLeft:
m.currentLevel.PlayerX--
case ActionRight:
m.currentLevel.PlayerX++
case ActionStop:
return // so don't move
}
if !m.currentLevel.IsAvailable(m.currentLevel.PlayerX, m.currentLevel.PlayerY) {
m.currentLevel.PlayerX, m.currentLevel.PlayerY = oldX, oldY
return // because it's an invalid move
}
entity.AddComponent(&MovementComponent{
From: engi.Point{float32(oldX) * tileWidth, float32(oldY) * tileHeight},
To: engi.Point{float32(m.currentLevel.PlayerX) * tileWidth, float32(m.currentLevel.PlayerY) * tileHeight},
In: time.Second / moveSpeed,
Callback: func() {
if m.currentLevel.Grid[m.currentLevel.PlayerY][m.currentLevel.PlayerX] == TileRoute {
m.currentLevel.Grid[m.currentLevel.PlayerY][m.currentLevel.PlayerX] = TileBlank
m.currentLevel.GridEntities[m.currentLevel.PlayerY][m.currentLevel.PlayerX].AddComponent(tileBlank)
} else if m.currentLevel.Grid[oldY][oldX] == TileError ||
m.currentLevel.Grid[oldY][oldX] == TileBlank {
m.currentLevel.Grid[oldY][oldX] = TileRoute
if m.currentLevel.Grid[m.currentLevel.PlayerY][m.currentLevel.PlayerX] == TileHiddenError {
m.currentLevel.Grid[m.currentLevel.PlayerY][m.currentLevel.PlayerX] = TileError
}
}
},
})
}
// Update sets the MouseComponent values for each Entity
func (m *MouseSystem) Update(entity *ecs.Entity, dt float32) {
var (
mc *MouseComponent
space *SpaceComponent
render *RenderComponent
ok bool
)
// We need MouseComponent to save our findings
if mc, ok = entity.ComponentFast(mc).(*MouseComponent); !ok {
return
}
// We need SpaceComponent for the location
if space, ok = entity.ComponentFast(space).(*SpaceComponent); !ok {
return
}
// We need RenderComponent for the Priority
if render, ok = entity.ComponentFast(render).(*RenderComponent); !ok {
return
}
// Reset some values
mc.Leave = false
mx := m.mouseX
my := m.mouseY
// Special case: HUD
if render.priority >= HUDGround {
mx = Mouse.X
my = Mouse.Y
}
// if the Mouse component is a tracker we always update it
// Check if the X-value is within range
// and if the Y-value is within range
if mc.Track || mx > space.Position.X && mx < (space.Position.X+space.Width) &&
my > space.Position.Y && my < (space.Position.Y+space.Height) {
mc.Enter = !mc.Hovered
mc.Hovered = true
mc.Released = false
// track mouse position so that systems that need to stay on the mouse
// position can do it (think an RTS when placing a new building and
// you get a ghost building following your mouse until you click to
// place it somewhere in your world.
mc.MouseX = mx
mc.MouseY = my
switch Mouse.Action {
case PRESS:
switch Mouse.Button {
case MouseButtonLeft:
mc.Clicked = true
case MouseButtonRight:
mc.RightClicked = true
}
m.mouseDown = true
case RELEASE:
switch Mouse.Button {
case MouseButtonLeft:
mc.Released = true
case MouseButtonRight:
mc.RightReleased = true
}
// dragging stops as soon as one of the currently pressed buttons
// is released
mc.Dragged = false
// mouseDown goes false as soon as one of the pressed buttons is
// released. Effectively ending any dragging
m.mouseDown = false
case MOVE:
if m.mouseDown {
mc.Dragged = true
}
}
} else {
if mc.Hovered {
mc.Leave = true
}
mc.Hovered = false
}
}