func (t *Tween) updateProgress() bool {
delta := engine.GameTime().Sub(t.startTime)
if t.reverse {
t.progress = 1 - float32(float64(delta)/float64(t.Time))
} else {
t.progress = float32(float64(delta) / float64(t.Time))
}
destroy := false
t.progress, destroy = t.Loop(t, t.progress)
return destroy
}
func Create(t *Tween) *Tween {
if t.To == nil || (t.To != nil && t.From == nil && t.Type == nil) {
panic("Not possible tween")
}
if t.Target != nil {
t.Target.AddComponent(newTweens(t))
}
if t.Algo == nil {
t.Algo = Linear
}
if t.Loop == nil {
t.Loop = None
}
t.startTime = engine.GameTime()
t.progress = 0
return t
}