public void CalculateGradient(bool cycled = false)
{
if (_keys.Count == 0)
{
return;
}
if (cycled)
{
_keys.Add(_keys[0]);
}
if (cycled)
{
var tmp = SplineUtils.Sub(_keys[1].Key, _keys[_keys.Count - 2].Key);
_keys[0] = new KeyValuePair <Vector3, Vector3>(_keys[0].Key, SplineUtils.Mul(tmp, 0.5f));
_keys[_keys.Count - 1] = new KeyValuePair <Vector3, Vector3>(_keys[_keys.Count - 1].Key, _keys[0].Value);
}
else
{
if (_keys.Count > 1)
{
var tmp1 = SplineUtils.Sub(_keys[1].Key, _keys[0].Key);
var tmp2 = SplineUtils.Sub(_keys[_keys.Count - 1].Key, _keys[_keys.Count - 2].Key);
_keys[0] = new KeyValuePair <Vector3, Vector3>(_keys[0].Key, tmp1);
_keys[_keys.Count - 1] = new KeyValuePair <Vector3, Vector3>(_keys[_keys.Count - 1].Key, tmp2);
}
}
for (int i = 1; i < _keys.Count - 1; i++)
{
var tmp = SplineUtils.Sub(_keys[i + 1].Key, _keys[i - 1].Key);
_keys[i] = new KeyValuePair <Vector3, Vector3>(_keys[i].Key, SplineUtils.Mul(tmp, 0.5f));
}
}
public void CalculateGradient()
{
_keys.Sort((KeyFrame a, KeyFrame b) =>
{
return(a.time.CompareTo(b.time));
});
int e = _keys.Count - 1;
var tmp_key0 = _keys[0];
var tmp_keye = _keys[e];
var tmp1 = SplineUtils.Sub(_keys[1].value, _keys[0].value);
var tmp2 = SplineUtils.Sub(_keys[e].value, _keys[e - 1].value);
tmp_key0.ts = SplineUtils.Mul(tmp1, 0.5f * (_keys[1].time - _keys[0].time));
tmp_keye.td = SplineUtils.Mul(tmp2, 0.5f * (_keys[e].time - _keys[e - 1].time));
_keys[0] = tmp_key0;
_keys[e] = tmp_keye;
for (int i = 1; i < e; i++)
{
var tmp_keyi = _keys[i];
var tmp3 = SplineUtils.Sub(_keys[i + 1].value, _keys[i - 1].value);
tmp_keyi.ts = tmp_keyi.td = SplineUtils.Mul(tmp3, 0.5f);
float inv_dd = 1.0f / (_keys[i + 1].time - _keys[i - 1].time);
float k1 = 2.0f * (_keys[i].time - _keys[i - 1].time) * inv_dd;
float k2 = 2.0f * (_keys[i + 1].time - _keys[i].time) * inv_dd;
tmp_keyi.td = SplineUtils.Mul(tmp_keyi.td, k1);
tmp_keyi.ts = SplineUtils.Mul(tmp_keyi.ts, k2);
_keys[i] = tmp_keyi;
}
}