Exemplo n.º 1
0
func ExampleGetRouteBetween_point() {
	from := &terrain.Position{0, 0}
	to := &terrain.Position{0, 0}

	route := terrain.GetRouteBetween(from, to)

	fmt.Println(route)
	// Output: [[0 0]]
}
Exemplo n.º 2
0
func ExampleGetRouteBetween_other() {
	from := &terrain.Position{-1, 5}
	to := &terrain.Position{5, 0}

	route := terrain.GetRouteBetween(from, to)

	fmt.Println(route)
	// Output: [[-1 5] [0 4] [1 3] [2 3] [3 2] [4 1] [5 0]]
}
Exemplo n.º 3
0
func ExampleGetRouteBetween_horizontal() {
	from := &terrain.Position{-2, 0}
	to := &terrain.Position{4, 0}

	route := terrain.GetRouteBetween(from, to)

	fmt.Println(route)
	// Output: [[-2 0] [-1 0] [0 0] [1 0] [2 0] [3 0] [4 0]]
}
Exemplo n.º 4
0
func ExampleGetRouteBetween_diagonal() {
	from := &terrain.Position{-2, 2}
	to := &terrain.Position{2, -2}

	route := terrain.GetRouteBetween(from, to)

	fmt.Println(route)
	// Output: [[-2 2] [-1 1] [0 0] [1 -1] [2 -2]]
}
Exemplo n.º 5
0
// Compute an entity's new position.
// Returns an EntityDiff if the entity has changed, nil otherwise.
func (m *Mover) UpdateEntity(ent *entity.Entity, now message.AbsoluteTick) (req *entity.UpdateRequest, collidesWith interface{}) {
	// TODO: remove Mover.lastUpdates?
	var last message.AbsoluteTick
	var ok bool
	if last, ok = m.lastUpdates[ent.Id]; !ok {
		last = now
	}

	m.lastUpdates[ent.Id] = now
	dt := time.Duration(now-last) * clock.TickDuration // Convert to seconds
	if dt == 0 {
		return
	}
	if dt < 0 {
		return // TODO: figure out if it's the right thing to do here
	}

	speed := ent.Speed
	pos := ent.Position

	nextPos := speed.GetNextPosition(pos, dt)
	if nextPos == nil {
		return
	}

	// Check terrain
	// TODO: use brensenham algorithm
	// See http://tech-algorithm.com/articles/drawing-line-using-bresenham-algorithm/
	route := terrain.GetRouteBetween(pos, nextPos)

	stoppedAt, collidesWith := checkRoute(route, ent, m.engine.ctx.Terrain, m.engine.ctx.Entity.List())
	if stoppedAt != nil {
		// The entity has been stopped while moving
		nextPos = stoppedAt
	}

	newEnt := entity.New()
	newEnt.Id = ent.Id
	newEnt.Position = nextPos
	diff := &message.EntityDiff{Position: true}

	req = entity.NewUpdateRequest(now, newEnt, diff)
	return
}