public override void Draw(GameTime time)
{
foreach (var entity in enabledEntities)
{
var associatedData = entity.Value;
var meshAnimation = associatedData.MeshAnimationUpdater;
var animationComponent = associatedData.AnimationComponent;
// Advance time for all playing animations with AutoPlay set to on
foreach (var playingAnimation in animationComponent.PlayingAnimations)
{
if (playingAnimation.IsPlaying)
{
switch (playingAnimation.RepeatMode)
{
case AnimationRepeatMode.PlayOnce:
playingAnimation.CurrentTime = TimeSpan.FromTicks(playingAnimation.CurrentTime.Ticks + (long)(time.Elapsed.Ticks * (double)playingAnimation.TimeFactor));
if (playingAnimation.CurrentTime > playingAnimation.Clip.Duration)
{
playingAnimation.CurrentTime = playingAnimation.Clip.Duration;
}
break;
case AnimationRepeatMode.LoopInfinite:
playingAnimation.CurrentTime = TimeSpan.FromTicks((playingAnimation.CurrentTime.Ticks + (long)(time.Elapsed.Ticks * (double)playingAnimation.TimeFactor)) % playingAnimation.Clip.Duration.Ticks);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
// Regenerate animation operations
animationOperations.Clear();
float totalWeight = 0.0f;
for (int index = 0; index < animationComponent.PlayingAnimations.Count; index++)
{
var playingAnimation = animationComponent.PlayingAnimations[index];
var animationWeight = playingAnimation.Weight;
// Skip animation with 0.0f weight
if (animationWeight == 0.0f)
{
continue;
}
// Default behavior for linea blending (it will properly accumulate multiple blending with their cumulative weight)
totalWeight += animationWeight;
float currentBlend = animationWeight / totalWeight;
if (playingAnimation.BlendOperation == AnimationBlendOperation.Add ||
playingAnimation.BlendOperation == AnimationBlendOperation.Subtract)
{
// Additive or substractive blending will use the weight as is (and reset total weight with it)
currentBlend = animationWeight;
totalWeight = animationWeight;
}
// Create evaluator
var evaluator = playingAnimation.Evaluator;
if (evaluator == null)
{
evaluator = animationComponent.Blender.CreateEvaluator(playingAnimation.Clip);
playingAnimation.Evaluator = evaluator;
}
animationOperations.Add(CreatePushOperation(playingAnimation));
if (animationOperations.Count >= 2)
{
animationOperations.Add(AnimationOperation.NewBlend(playingAnimation.BlendOperation, currentBlend));
}
}
if (animationOperations.Count > 0)
{
// Animation blending
animationComponent.Blender.Compute(animationOperations, ref associatedData.AnimationClipResult);
// Update animation data
meshAnimation.Update(associatedData.ModelComponent.ModelViewHierarchy, associatedData.AnimationClipResult);
}
else
{
// If nothing is playing, reset to bind pose
associatedData.ModelComponent.ModelViewHierarchy.ResetInitialValues();
}
// Update weight animation
for (int index = 0; index < animationComponent.PlayingAnimations.Count; index++)
{
var playingAnimation = animationComponent.PlayingAnimations[index];
if (playingAnimation.RemainingTime > TimeSpan.Zero)
{
playingAnimation.Weight += (playingAnimation.WeightTarget - playingAnimation.Weight) *
((float)time.Elapsed.Ticks /
(float)playingAnimation.RemainingTime.Ticks);
playingAnimation.RemainingTime -= time.Elapsed;
if (playingAnimation.RemainingTime <= TimeSpan.Zero)
{
playingAnimation.Weight = playingAnimation.WeightTarget;
}
}
else if (playingAnimation.Weight / totalWeight <= 0.01f)
{
animationComponent.PlayingAnimations.RemoveAt(index--);
var evaluator = playingAnimation.Evaluator;
if (evaluator != null)
{
animationComponent.Blender.ReleaseEvaluator(evaluator);
playingAnimation.Evaluator = null;
}
}
}
}
}
private AnimationOperation CreatePushOperation(PlayingAnimation playingAnimation)
{
return(AnimationOperation.NewPush(playingAnimation.Evaluator, playingAnimation.CurrentTime));
}