// 線形補間
public static QuaternionKeyframe Lerp(QuaternionKeyframe from, QuaternionKeyframe to, Vector2 t)
{
return(new QuaternionKeyframe(
Mathf.Lerp(from.time, to.time, t.x),
Quaternion.Slerp(from.value, to.value, t.y)
));
}
//计算四元数的插值
void _hermiteInterpolateQuaternion(QuaternionKeyframe frame, QuaternionKeyframe nextFrame, float t, float dur, Quaternion calcOut)
{
Quaternion p0 = frame.value;
Vector4 tan0 = frame.outTangent;
Quaternion p1 = nextFrame.value;
Vector4 tan1 = nextFrame.inTangent;
float t2 = t * t;
float t3 = t2 * t;
float a = 2.0f * t3 - 3.0f * t2 + 1.0f;
float b = t3 - 2.0f * t2 + t;
float c = t3 - t2;
float d = -2.0f * t3 + 3.0f * t2;
float t0 = tan0.x, t1 = tan1.x;
if (/*__JS__ */ !float.IsInfinity(t0) && !float.IsInfinity(t1))
{
calcOut.x = a * p0.x + b * t0 * dur + c * t1 * dur + d * p1.x;
}
else
{
calcOut.x = p0.x;
}
t0 = tan0.y; t1 = tan1.y;
if (/*__JS__ */ !float.IsInfinity(t0) && !float.IsInfinity(t1))
{
calcOut.y = a * p0.y + b * t0 * dur + c * t1 * dur + d * p1.y;
}
else
{
calcOut.y = p0.y;
}
t0 = tan0.z; t1 = tan1.z;
if (/*__JS__ */ !float.IsInfinity(t0) && !float.IsInfinity(t1))
{
calcOut.z = a * p0.z + b * t0 * dur + c * t1 * dur + d * p1.z;
}
else
{
calcOut.z = p0.z;
}
t0 = tan0.w; t1 = tan1.w;
if (/*__JS__ */ !float.IsInfinity(t0) && !float.IsInfinity(t1))
{
calcOut.w = a * p0.w + b * t0 * dur + c * t1 * dur + d * p1.w;
}
else
{
calcOut.w = p0.w;
}
}
// あるボーンに含まれるキーフレを抽出
// これは回転のみ
void CreateKeysForRotation(MMD.VMD.VMDFormat format, AnimationClip clip, string current_bone, string bone_path, int interpolationQuality)
{
try
{
List <MMD.VMD.VMDFormat.Motion> mlist = format.motion_list.motion[current_bone];
int keyframeCount = GetKeyframeCount(mlist, 3, interpolationQuality);
QuaternionKeyframe[] r_keys = new QuaternionKeyframe[keyframeCount];
QuaternionKeyframe r_prev_key = null;
int ir = 0;
for (int i = 0; i < mlist.Count; i++)
{
const float tick_time = 1.0f / 30.0f;
float tick = mlist[i].flame_no * tick_time;
Quaternion rotation = mlist[i].rotation;
QuaternionKeyframe r_cur_key = new QuaternionKeyframe(tick, rotation);
QuaternionKeyframe.AddBezierKeyframes(mlist[i].interpolation, 3, r_prev_key, r_cur_key, interpolationQuality, ref r_keys, ref ir);
r_prev_key = r_cur_key;
}
Keyframe[] rx_keys = null;
Keyframe[] ry_keys = null;
Keyframe[] rz_keys = null;
ToKeyframesForRotation(r_keys, ref rx_keys, ref ry_keys, ref rz_keys);
AnimationCurve curve_x = new AnimationCurve(rx_keys);
AnimationCurve curve_y = new AnimationCurve(ry_keys);
AnimationCurve curve_z = new AnimationCurve(rz_keys);
// ここで回転オイラー角をセット（補間はクォータニオン）
#if !UNITY_4_2 //4.3以降
AnimationUtility.SetEditorCurve(clip, EditorCurveBinding.FloatCurve(bone_path, typeof(Transform), "localEulerAngles.x"), curve_x);
AnimationUtility.SetEditorCurve(clip, EditorCurveBinding.FloatCurve(bone_path, typeof(Transform), "localEulerAngles.y"), curve_y);
AnimationUtility.SetEditorCurve(clip, EditorCurveBinding.FloatCurve(bone_path, typeof(Transform), "localEulerAngles.z"), curve_z);
#else
AnimationUtility.SetEditorCurve(clip, bone_path, typeof(Transform), "localEulerAngles.x", curve_x);
AnimationUtility.SetEditorCurve(clip, bone_path, typeof(Transform), "localEulerAngles.y", curve_y);
AnimationUtility.SetEditorCurve(clip, bone_path, typeof(Transform), "localEulerAngles.z", curve_z);
#endif
}
catch (KeyNotFoundException)
{
//Debug.LogError("互換性のないボーンが読み込まれました:" + bone_path);
}
}
// ベジェを線形補間で近似したキーフレームを追加する
public static void AddBezierKeyframes(byte[] interpolation, int type,
QuaternionKeyframe prev_keyframe, QuaternionKeyframe cur_keyframe, int interpolationQuality,
ref QuaternionKeyframe[] keyframes, ref int index)
{
if (prev_keyframe == null || IsLinear(interpolation, type))
{
keyframes[index++] = cur_keyframe;
}
else
{
Vector2 bezierHandleA = GetBezierHandle(interpolation, type, 0);
Vector2 bezierHandleB = GetBezierHandle(interpolation, type, 1);
int sampleCount = interpolationQuality;
for (int j = 0; j < sampleCount; j++)
{
float t = (j + 1) / (float)sampleCount;
Vector2 sample = SampleBezier(bezierHandleA, bezierHandleB, t);
keyframes[index++] = QuaternionKeyframe.Lerp(prev_keyframe, cur_keyframe, sample);
}
}
}