/// <summary>
/// xna will use this function to read my own .xnb file
/// </summary>
/// <param name="reader"></param>
public void Load(ContentReader reader)
{
//read the speed of animation
AnimationSpeed = reader.ReadSingle();
//first of all:it's bones count
BonesCount = reader.ReadInt32();
VmdAnimationFrames = new Dictionary <string, List <VmdKeyframe> >();
for (int i = 0; i < BonesCount; i++)
{
//for each bone
//1 bone name
string boneName = reader.ReadString();
List <VmdKeyframe> framesOfThisBone = new List <VmdKeyframe>();
//2 keyframe count
int keyframeCountOfThisBone = reader.ReadInt32();
//3 get all frame of this bone and push them into VmdFrames
for (int j = 0; j < keyframeCountOfThisBone; j++)
{
//get pos and rotation
VmdKeyframe keyframe = new VmdKeyframe();
//read time
keyframe.Time = reader.ReadSingle();
keyframe.Position = reader.ReadVector3();
keyframe.Rotation = reader.ReadQuaternion();
//push it into array
framesOfThisBone.Add(keyframe);
}
VmdAnimationFrames[boneName] = framesOfThisBone;
}
#region Face Frames
//face frame count
int faceFrameCount = reader.ReadInt32();
//just a copy of sth
VmdFaceFrames = new VmdFaceFrame[faceFrameCount];
for (int i = 0; i < faceFrameCount; i++)
{
VmdFaceFrames[i].MorphName = reader.ReadString();
VmdFaceFrames[i].IndexOfFrame = reader.ReadSingle();
VmdFaceFrames[i].WeightOfBaseVertex = reader.ReadSingle();
}
#endregion
}
/// <summary>
/// update animation
/// change the customBoneTransformation
/// </summary>
/// <param name="gameTime"></param>
private void UpdateAnimation(GameTime gameTime)
{
if (currentAnimation == null)
{
return;
}
//according the keyframes in the animation
//change the customBoneTransformation
//parameter:0.00005 is adjust for real situation in real world
g_time += gameTime.ElapsedGameTime.Milliseconds * 0.00005f * currentAnimation.AnimationSpeed;
//now we have tha animation
//whether loop the animation
if (g_time > 1.0f)
{
if (LoopAnimation)
{
g_time = 0.0f;
}
}
//check every bone and find their keyfram according to time
for (int i = 0; i < bonesNameList.Count; i++)
{
//if not exist the current bone
if (!currentAnimation.VmdAnimationFrames.ContainsKey(bonesNameList[i]))
{
boneLocalTransform[i] = boneLocalPose[i];
continue;
}
List <VmdKeyframe> frames = currentAnimation.VmdAnimationFrames[bonesNameList[i]];
if (frames == null)
{
continue;//if we couldn't find the bone
}
//find the frame index
int index = 0;
while ((index < frames.Count) && (frames[index].Time < g_time))
{
index++;
}
if (index == 0)
{
Vector3 internalPos = frames[0].Position;
Quaternion internalRot = frames[0].Rotation;;
customBoneTransformation[i] = (new Transform(new Vector3(0, 0, 0), internalRot)) * (new Transform(internalPos, Quaternion.Identity));
//customBoneTransformation[i] = new Transform(internalPos, internalRot);
//customBoneTransformation[i] = Matrix.CreateFromQuaternion(internalRot) * Matrix.CreateTranslation(internalPos);
}
else if (index >= frames.Count)
{
Vector3 internalPos = frames[frames.Count - 1].Position;
Quaternion internalRot = frames[frames.Count - 1].Rotation;
customBoneTransformation[i] = (new Transform(new Vector3(0, 0, 0), internalRot)) * (new Transform(internalPos, Quaternion.Identity));
//customBoneTransformation[i] = new Transform(internalPos, internalRot);
//customBoneTransformation[i] = Matrix.CreateFromQuaternion(internalRot) * Matrix.CreateTranslation(internalPos);
}
else
{
//interpolate frame
//1 position
VmdKeyframe current = frames[index - 1];
VmdKeyframe next = frames[index];
float ratio = (g_time - frames[index - 1].Time) /
(frames[index].Time - frames[index - 1].Time);
Vector3 internalPos = current.Position * (1 - ratio) + ratio * next.Position;
Quaternion internalRot = Quaternion.Lerp(current.Rotation, next.Rotation, ratio);
//change customBoneTransformation
customBoneTransformation[i] = (new Transform(new Vector3(0, 0, 0), internalRot)) * (new Transform(internalPos, Quaternion.Identity));
//customBoneTransformation[i] = new Transform(internalPos, internalRot);
//customBoneTransformation[i] = Matrix.CreateFromQuaternion(internalRot) * Matrix.CreateTranslation(internalPos);
}
boneLocalTransform[i] = customBoneTransformation[i] * boneLocalPose[i];
}
}