public Vector3 GetDirection(float inPercent, Curve inSegmentCurve = Curve.Linear)
{
if (m_Dirty)
{
Process();
}
SplineSegment segment;
GetSegment(inPercent, out segment);
float p1 = inSegmentCurve.Evaluate(segment.Interpolation);
float p2 = p1 + SplineMath.LookAhead;
Vector3 v1 = SplineMath.Hermite(m_Vertices[segment.VertexA].OutTangent, m_Vertices[segment.VertexA].Point,
m_Vertices[segment.VertexB].Point, m_Vertices[segment.VertexB].InTangent,
p1);
Vector3 v2 = SplineMath.Hermite(m_Vertices[segment.VertexA].OutTangent, m_Vertices[segment.VertexA].Point,
m_Vertices[segment.VertexB].Point, m_Vertices[segment.VertexB].InTangent,
p2);
Vector3 dir = new Vector3(
v2.x - v1.x,
v2.y - v1.y,
v2.z - v1.z
);
dir.Normalize();
return(dir);
}
public Vector3 GetPoint(float inPercent, Curve inSegmentCurve = Curve.Linear)
{
if (m_Dirty)
{
Process();
}
SplineSegment segment;
GetSegment(inPercent, out segment);
return(SplineMath.Hermite(m_Vertices[segment.VertexA].OutTangent, m_Vertices[segment.VertexA].Point,
m_Vertices[segment.VertexB].Point, m_Vertices[segment.VertexB].InTangent,
inSegmentCurve.Evaluate(segment.Interpolation)
));
}
private void CalculateLengths()
{
int segCount = m_SegmentCount;
if (!m_Looped)
{
m_VertexData[segCount].Marker = 1;
m_VertexData[segCount].Length = 0;
}
if (m_SubdivisionsPerSegment < 1)
{
m_SubdivisionsPerSegment = 1;
}
m_PreciseSegmentCount = segCount * m_SubdivisionsPerSegment;
Array.Resize(ref m_PreciseSegmentData, Mathf.NextPowerOfTwo(m_PreciseSegmentCount));
float directDistance = 0;
float preciseDistance = 0;
for (int i = 0; i < segCount; ++i)
{
int nextVertIndex = (i + 1) % m_VertexCount;
Vector3 myPos = m_Vertices[i].Point;
Vector3 nextPos = m_Vertices[nextVertIndex].Point;
float directSegmentDist = Vector3.Distance(myPos, nextPos);
float preciseSegmentDist = 0;
Vector3 prevPrecisePoint = myPos;
Vector3 nextPrecisePoint;
for (int j = 0; j < m_SubdivisionsPerSegment; ++j)
{
nextPrecisePoint = SplineMath.Hermite(m_Vertices[i].OutTangent, myPos, nextPos, m_Vertices[nextVertIndex].InTangent, (float)(j + 1) / m_SubdivisionsPerSegment);
preciseSegmentDist = Vector3.Distance(prevPrecisePoint, nextPrecisePoint);
int idx = i * m_SubdivisionsPerSegment + j;
m_PreciseSegmentData[idx].Marker = preciseDistance;
m_PreciseSegmentData[idx].Length = preciseSegmentDist;
preciseDistance += preciseSegmentDist;
prevPrecisePoint = nextPrecisePoint;
}
m_VertexData[i].Marker = directDistance;
m_VertexData[i].Length = directSegmentDist;
directDistance += directSegmentDist;
}
float invDirectDistance = 1f / directDistance;
float invPreciseDistance = 1f / preciseDistance;
for (int i = 0; i < segCount; ++i)
{
m_VertexData[i].Marker *= invDirectDistance;
m_VertexData[i].Length *= invDirectDistance;
}
for (int i = 0; i < m_PreciseSegmentCount; ++i)
{
m_PreciseSegmentData[i].Marker *= invPreciseDistance;
m_PreciseSegmentData[i].Length *= invPreciseDistance;
}
m_DirectDistance = directDistance;
m_PreciseDistance = preciseDistance;
}