// Instead of advancing the tween from the previous position each time,
// uses the given position to calculate running time since startup, and places the tween there like a Goto.
// Executes regardless of whether the tween is playing.
// Returns TRUE if the tween needs to be killed
internal static bool DoGoto(Tween t, float toPosition, int toCompletedLoops, UpdateMode updateMode)
{
// Startup
if (!t.startupDone)
{
if (!t.Startup())
{
return(true);
}
}
// OnStart and first OnPlay callbacks
if (!t.playedOnce && updateMode == UpdateMode.Update)
{
t.playedOnce = true;
if (t.onStart != null)
{
t.onStart();
if (!t.active)
{
return(true); // Tween might have been killed by onStart callback
}
}
if (t.onPlay != null)
{
t.onPlay();
if (!t.active)
{
return(true); // Tween might have been killed by onPlay callback
}
}
}
float prevPosition = t.position;
int prevCompletedLoops = t.completedLoops;
t.completedLoops = toCompletedLoops;
bool wasRewinded = t.position <= 0 && prevCompletedLoops <= 0;
bool wasComplete = t.isComplete;
// Determine if it will be complete after update
if (t.loops != -1)
{
t.isComplete = t.completedLoops == t.loops;
}
// Calculate newCompletedSteps (always useful with Sequences)
int newCompletedSteps = 0;
if (updateMode == UpdateMode.Update)
{
if (t.isBackwards)
{
newCompletedSteps = t.completedLoops < prevCompletedLoops ? prevCompletedLoops - t.completedLoops : (toPosition <= 0 && !wasRewinded ? 1 : 0);
if (wasComplete)
{
newCompletedSteps--;
}
}
else
{
newCompletedSteps = t.completedLoops > prevCompletedLoops ? t.completedLoops - prevCompletedLoops : 0;
}
}
else if (t.tweenType == TweenType.Sequence)
{
newCompletedSteps = prevCompletedLoops - toCompletedLoops;
if (newCompletedSteps < 0)
{
newCompletedSteps = -newCompletedSteps;
}
}
// Set position (makes position 0 equal to position "end" when looping)
t.position = toPosition;
if (t.position > t.duration)
{
t.position = t.duration;
}
else if (t.position <= 0)
{
if (t.completedLoops > 0 || t.isComplete)
{
t.position = t.duration;
}
else
{
t.position = 0;
}
}
// Set playing state after update
if (t.isPlaying)
{
if (!t.isBackwards)
{
t.isPlaying = !t.isComplete; // Reached the end
}
else
{
t.isPlaying = !(t.completedLoops == 0 && t.position <= 0); // Rewinded
}
}
// updatePosition is different in case of Yoyo loop under certain circumstances
bool useInversePosition = t.loopType == LoopType.Yoyo &&
(t.position < t.duration ? t.completedLoops % 2 != 0 : t.completedLoops % 2 == 0);
// Get values from plugin and set them
if (t.ApplyTween(prevPosition, prevCompletedLoops, newCompletedSteps, useInversePosition, updateMode))
{
return(true);
}
// Additional callbacks
if (t.onUpdate != null)
{
t.onUpdate();
}
if (t.position <= 0 && t.completedLoops <= 0 && !wasRewinded)
{
if (t.onRewind != null)
{
t.onRewind();
}
}
if (newCompletedSteps > 0 && updateMode == UpdateMode.Update && t.onStepComplete != null)
{
for (int i = 0; i < newCompletedSteps; ++i)
{
t.onStepComplete();
}
}
if (t.isComplete && !wasComplete)
{
if (t.onComplete != null)
{
t.onComplete();
}
}
// Return
return(t.autoKill && t.isComplete);
}