private static Animation CreateAnimation(SerializableAnimation animationContent)
{
Animation animation = new Animation(animationContent.name);
animation.SetLength(animationContent.length);
foreach (SerializableTrack trackContent in animationContent.tracks)
{
AnimationTrack track = animation.CreateTrack(trackContent.name);
for (int i = 0; i < trackContent.keyframes.Count; i++)
{
SerializableKeyFrame keyFrameContent = trackContent.keyframes[i];
AnimationKeyFrame keyFrame = new AnimationKeyFrame
{
rotation = keyFrameContent.rotation,
scale = keyFrameContent.scale,
translation = keyFrameContent.translation,
time = keyFrameContent.time
};
track.AddKeyFrame(keyFrame);
}
}
return animation;
}
//-----------------------------------------------------------------------
public void InterpolateToKeyframe(AnimationKeyFrame keyframe, float weight)
{
weight = 1 - weight;
float frameTime = MathHelper.Lerp(this.time, keyframe.time, weight);
this.rotation = Quaternion.Lerp(this.rotation, keyframe.rotation, weight);
this.scale = this.scale * (1 - weight) + keyframe.scale * weight;
this.translation = this.translation * (1 - weight) + keyframe.translation * weight;
}
//-----------------------------------------------------------------------
public float GetKeyFramesAtTime(float time, out AnimationKeyFrame keyframeA, out AnimationKeyFrame keyframeB)
{
//this code might be wrong
// https://github.com/FrictionalGames/HPL1Engine/blob/master/sources/graphics/AnimationTrack.cpp#L152
float totalAnimLength = parent.GetLength();
time = MathHelper.Clamp(time, 0, totalAnimLength);
//If longer than max time return last frame and first
if (time >= maxFrameTime)
{
keyframeA = keyframes[keyframes.Count - 1];
keyframeB = keyframes[0];
return(0.0f);
}
//Find the second frame.
int keyframeIndexB = -1;
for (int i = 0; i < keyframes.Count; i++)
{
if (time <= keyframes[i].time)
{
keyframeIndexB = i;
break;
}
}
//If first frame was found, the lowest time is not 0.
//If so return the first frame only.
if (keyframeIndexB == 0)
{
keyframeA = keyframes[0];
keyframeB = keyframes[0];
return(0.0f);
}
//Get the frames
keyframeA = keyframes[keyframeIndexB - 1];
keyframeB = keyframes[keyframeIndexB];
float deltaTime = keyframeB.time - keyframeA.time;
return((time - keyframeA.time) / deltaTime);
}
//-----------------------------------------------------------------------
//////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS
//////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------
public void AddKeyFrame(AnimationKeyFrame frame)
{
float time = frame.time;
if (time > maxFrameTime || keyframes.Count == 0)
{
keyframes.Add(frame);
maxFrameTime = time;
}
else
{
int i;
for (i = 0; i < keyframes.Count; i++)
{
if (time < keyframes[i].time)
break;
}
keyframes.Insert(i, frame);
}
}
//-----------------------------------------------------------------------
//////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS
//////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------
public void AddKeyFrame(AnimationKeyFrame frame)
{
float time = frame.time;
if (time > maxFrameTime || keyframes.Count == 0)
{
keyframes.Add(frame);
maxFrameTime = time;
}
else
{
int i;
for (i = 0; i < keyframes.Count; i++)
{
if (time < keyframes[i].time)
{
break;
}
}
keyframes.Insert(i, frame);
}
}
//-----------------------------------------------------------------------
public AnimationKeyFrame GetInterpolatedKeyFrame(float time)
{
AnimationKeyFrame resultKeyFrame = new AnimationKeyFrame(time);
AnimationKeyFrame keyFrameA;
AnimationKeyFrame keyFrameB;
float frameTime = GetKeyFramesAtTime(time, out keyFrameA, out keyFrameB);
if(frameTime == 0.0f)
{
resultKeyFrame.rotation = keyFrameA.rotation;
resultKeyFrame.scale = keyFrameA.scale;
resultKeyFrame.translation = keyFrameA.translation;
}
else
{
resultKeyFrame.rotation = Quaternion.Lerp(keyFrameA.rotation, keyFrameB.rotation, frameTime);
resultKeyFrame.scale = keyFrameA.scale * (1 - frameTime) + keyFrameB.scale * frameTime;
resultKeyFrame.translation = keyFrameA.translation * (1 - frameTime) + keyFrameB.translation * frameTime;
}
return resultKeyFrame;
}
//-----------------------------------------------------------------------
public AnimationKeyFrame GetInterpolatedKeyFrame(float time)
{
AnimationKeyFrame resultKeyFrame = new AnimationKeyFrame(time);
AnimationKeyFrame keyFrameA;
AnimationKeyFrame keyFrameB;
float frameTime = GetKeyFramesAtTime(time, out keyFrameA, out keyFrameB);
if (frameTime == 0.0f)
{
resultKeyFrame.rotation = keyFrameA.rotation;
resultKeyFrame.scale = keyFrameA.scale;
resultKeyFrame.translation = keyFrameA.translation;
}
else
{
resultKeyFrame.rotation = Quaternion.Lerp(keyFrameA.rotation, keyFrameB.rotation, frameTime);
resultKeyFrame.scale = keyFrameA.scale * (1 - frameTime) + keyFrameB.scale * frameTime;
resultKeyFrame.translation = keyFrameA.translation * (1 - frameTime) + keyFrameB.translation * frameTime;
}
return(resultKeyFrame);
}
//-----------------------------------------------------------------------
public float GetKeyFramesAtTime(float time, out AnimationKeyFrame keyframeA, out AnimationKeyFrame keyframeB)
{
//this code might be wrong
// https://github.com/FrictionalGames/HPL1Engine/blob/master/sources/graphics/AnimationTrack.cpp#L152
float totalAnimLength = parent.GetLength();
time = MathHelper.Clamp(time, 0, totalAnimLength);
//If longer than max time return last frame and first
if(time >= maxFrameTime)
{
keyframeA = keyframes[keyframes.Count-1];
keyframeB = keyframes[0];
return 0.0f;
}
//Find the second frame.
int keyframeIndexB=-1;
for(int i=0; i< keyframes.Count; i++)
{
if (time <= keyframes[i].time)
{
keyframeIndexB = i;
break;
}
}
//If first frame was found, the lowest time is not 0.
//If so return the first frame only.
if(keyframeIndexB == 0)
{
keyframeA = keyframes[0];
keyframeB = keyframes[0];
return 0.0f;
}
//Get the frames
keyframeA = keyframes[keyframeIndexB - 1];
keyframeB = keyframes[keyframeIndexB];
float deltaTime = keyframeB.time - keyframeA.time;
return (time - keyframeA.time) / deltaTime;
}
//-----------------------------------------------------------------------
public void InterpolateToKeyframe(AnimationKeyFrame keyframe, float weight)
{
weight = 1 - weight;
float frameTime = MathHelper.Lerp(this.time, keyframe.time, weight);
this.rotation = Quaternion.Lerp(this.rotation, keyframe.rotation, weight);
this.scale = this.scale * (1 - weight) + keyframe.scale * weight;
this.translation = this.translation * (1 - weight) + keyframe.translation * weight;
}