/// <summary>Positions the virtual camera according to the transposer rules.</summary>
/// <param name="curState">The current camera state</param>
/// <param name="deltaTime">Used for damping. If less that 0, no damping is done.</param>
public override void MutateCameraState(ref CameraState curState, float deltaTime)
{
// Init previous frame state info
if (deltaTime < 0)
{
m_PreviousPathPosition = m_PathPosition;
m_PreviousCameraPosition = curState.RawPosition;
}
if (!IsValid)
{
return;
}
//UnityEngine.Profiling.Profiler.BeginSample("CinemachineTrackedDolly.MutateCameraState");
// Get the new ideal path base position
if (m_AutoDolly.m_Enabled && FollowTarget != null)
{
float prevPos = m_PreviousPathPosition;
if (m_PositionUnits == CinemachinePathBase.PositionUnits.Distance)
{
prevPos = m_Path.GetPathPositionFromDistance(prevPos);
}
// This works in path units
m_PathPosition = m_Path.FindClosestPoint(
FollowTarget.transform.position,
Mathf.FloorToInt(prevPos),
(deltaTime < 0 || m_AutoDolly.m_SearchRadius <= 0)
? -1 : m_AutoDolly.m_SearchRadius,
m_AutoDolly.m_SearchResolution);
if (m_PositionUnits == CinemachinePathBase.PositionUnits.Distance)
{
m_PathPosition = m_Path.GetPathDistanceFromPosition(m_PathPosition);
}
// Apply the path position offset
m_PathPosition += m_AutoDolly.m_PositionOffset;
}
float newPathPosition = m_PathPosition;
if (deltaTime >= 0)
{
// Normalize previous position to find the shortest path
float maxUnit = m_Path.MaxUnit(m_PositionUnits);
if (maxUnit > 0)
{
float prev = m_Path.NormalizeUnit(m_PreviousPathPosition, m_PositionUnits);
float next = m_Path.NormalizeUnit(newPathPosition, m_PositionUnits);
if (m_Path.Looped && Mathf.Abs(next - prev) > maxUnit / 2)
{
if (next > prev)
{
prev += maxUnit;
}
else
{
prev -= maxUnit;
}
}
m_PreviousPathPosition = prev;
newPathPosition = next;
}
// Apply damping along the path direction
float offset = m_PreviousPathPosition - newPathPosition;
offset = Damper.Damp(offset, m_ZDamping, deltaTime);
newPathPosition = m_PreviousPathPosition - offset;
}
m_PreviousPathPosition = newPathPosition;
Quaternion newPathOrientation = m_Path.EvaluateOrientationAtUnit(newPathPosition, m_PositionUnits);
// Apply the offset to get the new camera position
Vector3 newCameraPos = m_Path.EvaluatePositionAtUnit(newPathPosition, m_PositionUnits);
Vector3 offsetX = newPathOrientation * Vector3.right;
Vector3 offsetY = newPathOrientation * Vector3.up;
Vector3 offsetZ = newPathOrientation * Vector3.forward;
newCameraPos += m_PathOffset.x * offsetX;
newCameraPos += m_PathOffset.y * offsetY;
newCameraPos += m_PathOffset.z * offsetZ;
// Apply damping to the remaining directions
if (deltaTime >= 0)
{
Vector3 currentCameraPos = m_PreviousCameraPosition;
Vector3 delta = (currentCameraPos - newCameraPos);
Vector3 delta1 = Vector3.Dot(delta, offsetY) * offsetY;
Vector3 delta0 = delta - delta1;
delta0 = Damper.Damp(delta0, m_XDamping, deltaTime);
delta1 = Damper.Damp(delta1, m_YDamping, deltaTime);
newCameraPos = currentCameraPos - (delta0 + delta1);
}
curState.RawPosition = m_PreviousCameraPosition = newCameraPos;
// Set the orientation and up
Quaternion newOrientation
= GetTargetOrientationAtPathPoint(newPathOrientation, curState.ReferenceUp);
if (deltaTime < 0)
{
m_PreviousOrientation = newOrientation;
}
else
{
if (deltaTime >= 0)
{
Vector3 relative = (Quaternion.Inverse(m_PreviousOrientation)
* newOrientation).eulerAngles;
for (int i = 0; i < 3; ++i)
{
if (relative[i] > 180)
{
relative[i] -= 360;
}
}
relative = Damper.Damp(relative, AngularDamping, deltaTime);
newOrientation = m_PreviousOrientation * Quaternion.Euler(relative);
}
m_PreviousOrientation = newOrientation;
}
curState.RawOrientation = newOrientation;
curState.ReferenceUp = curState.RawOrientation * Vector3.up;
//UnityEngine.Profiling.Profiler.EndSample();
}