void SetTimeToLengthTables(TweenPlugPath p, int subdivisions)
{
TweenPlugPathPoint prevP = _cachePoint1, currP = _cachePoint2;
var ptCount = p.pathPointCount;
float pathLen = 0;
float incr = 1f / subdivisions;
float[] timesTable = new float[subdivisions];
float[] lengthsTable = new float[subdivisions];
GetPoint(prevP, 0, p.wps, p);
for (int i = 1; i < subdivisions + 1; ++i)
{
float perc = incr * i;
GetPoint(currP, perc, p.wps, p);
pathLen += TweenPlugPathPoint.Distance(currP, prevP, ptCount);
prevP.Copy(currP, ptCount);
timesTable[i - 1] = perc;
lengthsTable[i - 1] = pathLen;
}
// Assign
p.length = pathLen;
p.timesTable = timesTable;
p.lengthsTable = lengthsTable;
}
public void GetPoint(TweenPlugPathPoint output, float perc, TweenPlugPathPoint[] wps, TweenPlugPath p)
{
var ptCount = p.pathPointCount;
if (perc <= 0)
{
p.linearWPIndex = 1;
output.Copy(wps[0], ptCount);
return;
}
int startPIndex = 0;
int endPIndex = 0;
int count = p.timesTable.Length;
for (int i = 1; i < count; i++)
{
if (p.timesTable[i] >= perc)
{
startPIndex = i - 1;
endPIndex = i;
break;
}
}
float startPPerc = p.timesTable[startPIndex];
float partialPerc = perc - startPPerc;
float partialLen = p.length * partialPerc;
var wp0 = wps[startPIndex];
var wp1 = wps[endPIndex];
p.linearWPIndex = endPIndex;
//output = wp0 + clamp(wp1 - wp0, partialLen)
for (int i = 0; i < ptCount; i++)
{
output.vals[i] = wp1.vals[i] - wp0.vals[i];
}
output.ClampMagnitude(partialLen, ptCount);
for (int i = 0; i < ptCount; i++)
{
output.vals[i] += wp0.vals[i];
}
}
void SetPathLength(TweenPlugPath p, int subdivisions)
{
TweenPlugPathPoint prevP = _cachePoint1, currP = _cachePoint2;
var ptCount = p.pathPointCount;
float pathLen = 0;
float incr = 1f / subdivisions;
GetPoint(prevP, 0, p.wps, p);
for (int i = 1; i < subdivisions + 1; ++i)
{
float perc = incr * i;
GetPoint(currP, perc, p.wps, p);
pathLen += TweenPlugPathPoint.Distance(currP, prevP, ptCount);
prevP.Copy(currP, ptCount);
}
// Assign
p.length = pathLen;
p.timesTable = null;
p.lengthsTable = null;
}
