Example #1
0
// Update ticks all Entity animations for the time since last frame
func (self *Animation) Update(deltaT float32) {
	var animation *components.Animation
	var handler animationHandler
	var ok bool

	for _, entity := range self.entitySet.Entities() {
		animation = components.GetAnimation(entity)
		handler, ok = animationHandlers[animation.PropertyName]

		if !ok {
			log.Panicf("[Animation] No animation handler defined for %s\n", animation.PropertyName)
		}

		if handler(deltaT, entity) {
			animation.Finish()
			entity.RemoveComponent(components.ANIMATION)
		}
	}
}
Example #2
0
// Simple linear animation between two positions over time
func animatePosition(deltaT float32, entity *core.Entity) bool {
	animation := components.GetAnimation(entity)
	transform := components.GetTransform(entity)

	// Move more of this into the Animation?
	// Basically we are building this to figure out the distance we need to travel
	// in the current tick to have consistent, linear movement over the time period requested.
	// Probably better ways of calculating this.
	if animation.CurrentTweenTick == 0 {
		animation.TweenStartAt = transform.Position
	}

	animation.CurrentTweenTick += deltaT

	tweenPercent := deltaT / animation.TweenTime

	movePerFrame := animation.TweenTo.Sub(animation.TweenStartAt).Scale(tweenPercent)
	transform.Position = transform.Position.Add(movePerFrame)

	return animation.CurrentTweenTick >= animation.TweenTime
}