public static void GetMaxError(KeyAnalyzer line, KeyAnalyzer newKeys, out float error, out int index)
{
var fcount = Math.Min(newKeys.FrameCount, line.FrameCount);
error = 0;
index = -1;
for (int i = 0; i < fcount; i++)
{
var orgValue = line.GetValue(i);
var newValue = newKeys.GetValue(i);
var er = Math.Abs(newValue - orgValue);
if (er > error)
{
error = er;
index = i;
}
}
}
/// <summary>
///
/// </summary>
/// <param name="values"></param>
public static List <FOBJKey> Simplify(List <FOBJKey> keys, float maxError)
{
// check constant key track{
{
bool keyTrack = true;
for (int i = 1; i < keys.Count; i++)
{
if (Math.Abs(keys[i].Value - keys[0].Value) > 0.001f)
{
keyTrack = false;
break;
}
}
if (keyTrack)
{
var key = keys[0];
key.InterpolationType = HSDRaw.Common.Animation.GXInterpolationType.HSD_A_OP_KEY;
keys.Clear();
keys.Add(key);
return(keys);
}
}
CalculateSlopes(keys);
var newKeys = new List <FOBJKey>();
// find constant and linear keys
{
newKeys.Add(CloneKey(keys[0]));
for (int i = 1; i < keys.Count - 2; i++)
{
// this key is constant, so skip
if (Math.Abs(keys[i].Value - keys[i - 1].Value) < 0.00001f)
{
continue;
}
// step check
if (Math.Abs(keys[i].Value - keys[i + 1].Value) < 0.00001f)
{
/*var nkey = CloneKey(keys[i]);
* nkey.InterpolationType = HSDRaw.Common.Animation.GXInterpolationType.HSD_A_OP_CON;
* nkey.Tan = 0;
* newKeys.Add(nkey);*/
continue;
}
//TODO: lerp detection
// linear check
/*float FrameDiff = (i + 1) - keys[i].Frame;
* float Weight = FrameDiff / (keys[i + 1].Frame - keys[i].Frame);
*
* var lerpIndex = i + 1;
* while (lerpIndex < keys.Count - 1 && AnimationInterpolationHelper.Lerp(keys[i].Value, keys[lerpIndex].Value, Weight) == keys[lerpIndex].Value)
* {
* lerpIndex++;
* FrameDiff = lerpIndex - keys[i].Frame;
* Weight = FrameDiff / (keys[lerpIndex].Frame - keys[i].Frame);
* }
*
* // if this key is linear then skip linear keys and change interpolation type
* if (lerpIndex > i + 2)
* {
* System.Diagnostics.Debug.WriteLine("Linear");
* var nkey = CloneKey(keys[i]);
* nkey.InterpolationType = HSDRaw.Common.Animation.GXInterpolationType.HSD_A_OP_LIN;
* nkey.Tan = 0;
* i = lerpIndex - 1;
* newKeys.Add(nkey);
* }*/
}
newKeys.Add(CloneKey(keys[keys.Count - 1]));
}
// prepare analyzing
var analyzer1 = new KeyAnalyzer(keys);
var analyzer2 = new KeyAnalyzer(newKeys);
// insert keys until error is reduced within threshold
float error = float.MaxValue;
var index = 0;
int prevIndex = 0;
while (error > maxError)
{
KeyAnalyzer.GetMaxError(analyzer1, analyzer2, out error, out index);
if (index == prevIndex || index >= keys.Count || index < 0)
{
break;
}
var loc = newKeys.FindIndex(e => keys[index].Frame <= e.Frame);
if (loc != -1)
{
newKeys.Insert(loc, CloneKey(keys[index]));
}
else
{
break;
}
prevIndex = index;
}
int removedLinear = 0;
// use linear where possible
{
for (int j = 0; j < newKeys.Count - 1; j++)
{
var k = newKeys[j];
if ((newKeys[j + 1].Frame - k.Frame) <= 2)
{
k.InterpolationType = HSDRaw.Common.Animation.GXInterpolationType.HSD_A_OP_LIN;
removedLinear++;
}
}
//Console.WriteLine($"Removed {removed} keys");
}
int removed = 0;
// cleanup pass, make sure all frames are necessary
List <FOBJKey> finalKeys = new List <FOBJKey>();
finalKeys.Add(keys[0]);
for (int j = 1; j < newKeys.Count - 1; j++)
{
var k = newKeys[j];
analyzer1 = new KeyAnalyzer(newKeys.Where(e => e != k).ToList());
KeyAnalyzer.GetMaxError(analyzer1, analyzer2, out error, out index);
if (error < maxError)
{
removed++;
}
else
{
finalKeys.Add(k);
}
}
finalKeys.Add(keys[keys.Count - 1]);
newKeys = finalKeys;
Debug.WriteLine($"Removed {removed} keys converted {removedLinear} to linear");
// make sure to always have final key
//if (!newKeys.Contains(keys[keys.Count - 1]))
// newKeys.Add(keys[keys.Count - 1]);
return(newKeys);
}