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 (a *AnimationSystem) Update(e *ecs.Entity, dt float32) {
var (
ac *AnimationComponent
r *RenderComponent
ok bool
)
if ac, ok = e.ComponentFast(ac).(*AnimationComponent); !ok {
return
}
if r, ok = e.ComponentFast(r).(*RenderComponent); !ok {
return
}
ac.change += dt
if ac.change >= ac.Rate {
ac.NextFrame()
r.SetDrawable(ac.Cell())
}
}
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})
}
}
}
// 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
}
// Check if the X-value is within range
// and if the Y-value is within range
if 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
switch Mouse.Action {
case PRESS:
mc.Clicked = true
m.mouseDown = true
case RELEASE:
m.mouseDown = false
mc.Dragged = false
mc.Clicked = false
case MOVE:
if m.mouseDown {
mc.Dragged = true
}
}
} else {
if mc.Hovered {
mc.Leave = true
}
mc.Enter = false
mc.Hovered = false
mc.Dragged = false
}
}