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})
}
}
}
}
