SCameraFlightPoint CCameraFlight::GetSplinePoint(float t)
{
if(m_cameraCourse.size() < 3)
return SCameraFlightPoint();
//clamp to 0..1 range
CRY_ASSERT( t >= 0.0f && t <= 1.0f );
t = clamp(t, 0.0f, 1.0f);
m_tempCourseA = m_cameraCourse;
m_tempCourseB.clear();
//generate spline points
do
{
for(int p = 0; p < m_tempCourseA.size()-1; ++p)
{
m_tempCourseB.push_back(m_tempCourseA[p]*(1.0f-t) + m_tempCourseA[p+1]*t);
}
m_tempCourseA = m_tempCourseB;
m_tempCourseB.clear();
}
while (m_tempCourseA.size() > 1);
//all points are relative to m_vRefPos (which can be ZERO)
return m_tempCourseA[0] + m_vRefPos;
}
SCameraFlightPoint CCameraFlight::GetTrackPoint(float t)
{
//clamp to 0..1 range
CRY_ASSERT(t >= 0.0f && t <= 1.0f);
t = clamp(t, 0.0f, 1.0f);
float fLength = GetCourseLength();
float fPositionOffset = fLength * t;
CRY_ASSERT(!m_cameraCourse.empty());
std::vector<SCameraFlightPoint>::const_iterator iter = m_cameraCourse.begin();
// iterate to the second position
++iter;
std::vector<SCameraFlightPoint>::const_iterator end = m_cameraCourse.end();
float fMoveDistance = 0.0f;
float fLastMoveDistance = 0.0f;
Vec3 vTempPos = m_cameraCourse[0].m_vCamPos;
Vec3 vLastLookAt = m_cameraCourse[0].m_vCamLookAt;
//compute track position for t
for(; iter != end; ++iter)
{
fLastMoveDistance = fMoveDistance;
Vec3 vEdge = iter->m_vCamPos - vTempPos;
float fEdgeDistance = vEdge.len();
fMoveDistance += fEdgeDistance;
if(fMoveDistance > fPositionOffset)
{
float fEdgeDelta = fPositionOffset - fLastMoveDistance;
Vec3 vLookDelta = (iter->m_vCamLookAt - vLastLookAt).normalized();
return SCameraFlightPoint(vTempPos + fEdgeDelta * vEdge.normalized(), vLastLookAt + fEdgeDelta * vLookDelta) + m_vRefPos;
}
//update last Pos
vLastLookAt = iter->m_vCamLookAt;
vTempPos = iter->m_vCamPos;
}
//all points are relative to m_vRefPos (which can be ZERO)
return m_cameraCourse[0] + m_vRefPos;
}
void CCameraFlight::UpdateFlight(SViewParams &viewParams)
{
if(m_eMovementMode != eCFM_FREE_FLIGHT &&
(m_fFlightProgress >= 1.0f || m_eMovementMode == eCFM_NONE || m_cameraCourse.size() < 3))
{
//update free fly point while not in free fly
m_freeFlyPoint.m_vCamPos = viewParams.position;
m_freeFlyPoint.m_vCamLookAt = viewParams.position + Vec3Constants<float>::fVec3_OneY;
m_eState = eCFS_NONE;
//nothing else to do
return;
}
m_eState = eCFS_RUNNING;
//update ref pos
if(m_pRefEnt)
m_vRefPos = m_pRefEnt->GetWorldPos();
//if refPos2 is set, find middle
if(m_vRefPos2.len2() > 0.0f)
m_vRefPos = (m_vRefPos + m_vRefPos2) * 0.5f;
//find target
SCameraFlightPoint targetPoint = SCameraFlightPoint();
switch(m_eMovementMode)
{
case eCFM_FREE_FLIGHT:
targetPoint = m_freeFlyPoint;
break;
case eCFM_SPLINE:
targetPoint = GetSplinePoint(m_fFlightProgress);
break;
case eCFM_LINE:
targetPoint = GetTrackPoint(m_fFlightProgress);
break;
default:
break;
}
//compute new dir/pos
m_vLookingDirection = targetPoint.m_vCamLookAt - targetPoint.m_vCamPos;
if(m_bUseRefDir)
{
m_vLookingDirection = m_vRefDir;
m_qFadeOrientation = Quat::CreateRotationVDir(m_vLookingDirection, 0.0f);
}
m_vLookingDirection.NormalizeSafe();
Quat qTempDirection = Quat::CreateRotationVDir(m_vLookingDirection, 0.0f);
Vec3 vTempPos = targetPoint.m_vCamPos;
bool bFading = false;
//compute fading
if(m_eMovementMode != eCFM_FREE_FLIGHT)
{
if(m_fFlightProgress > m_fFadeOutTime && (m_eFadeMode == eCFFM_OUT || m_eFadeMode == eCFFM_INOUT))
{
//fade position
m_fFadeProgress = InterpolateTo(m_fFadeProgress, 1.0f, m_fFadeTime);
m_vTargetFadePos = vTempPos * (1.0f - m_fFadeProgress) + viewParams.position * m_fFadeProgress;
//fade orientation
qTempDirection = Quat_tpl<float>::CreateNlerp(m_qFadeOrientation, viewParams.rotation, m_fFadeProgress);
if(m_fFadeProgress < 0.998f)
{
bFading = true;
m_eState = eCFS_FADE_OUT;
}
}
else if(m_fFlightProgress < m_fFadeInTime && (m_eFadeMode == eCFFM_IN || m_eFadeMode == eCFFM_INOUT))
{
//fade position
m_fFadeProgress = InterpolateTo(m_fFadeProgress, 1.0f, m_fFadeTime);
m_vTargetFadePos = viewParams.position * (1.0f - m_fFadeProgress) + vTempPos * m_fFadeProgress;
//fade orientation
qTempDirection = Quat_tpl<float>::CreateNlerp(viewParams.rotation, qTempDirection, m_fFadeProgress);
if(m_fFadeProgress < 0.998f)
{
bFading = true;
m_eState = eCFS_FADE_IN;
}
}
else
{
m_vTargetFadePos = vTempPos;
//m_vTargetFadeLookAt = targetPoint.m_vCamLookAt;
m_qFadeOrientation = qTempDirection;
m_fFadeProgress = 0.0f;
m_eState = eCFS_RUNNING;
}
}
else
{
m_vTargetFadePos = vTempPos;
}
//update dir
m_vLookingDirection = qTempDirection.GetColumn1();
//raycast to prevent clipping during flight
if(m_eMovementMode != eCFM_FREE_FLIGHT)
DetectCollisions();
//set position and rotation to viewparams
viewParams.rotation = qTempDirection;
viewParams.position = m_vTargetFadePos;//InterpolateTo(m_vTargetFadePos, viewParams.position, 1.0f);
//progress flight
if(m_eMovementMode != eCFM_FREE_FLIGHT && !bFading)
{
if(m_bPaused && m_fFlightProgress < 0.2f)
{
m_fFlightProgress += gEnv->pTimer->GetFrameTime() * m_fFlightSpeed;
m_fFlightProgress = min(0.2f, m_fFlightProgress);
}
else if (!m_bPaused)
m_fFlightProgress += gEnv->pTimer->GetFrameTime() * m_fFlightSpeed;
}
}