void CCameraFlight::SetMoveSpeed(float fMpS /* = 4.0f */)
{
CRY_ASSERT(fMpS > 0.0f);
fMpS = max(fMpS, g_fCamError);
if(m_cameraCourse.size() < 3)
{
m_fFlightSpeed = 1.0f;
return;
}
//collect flight distance
float fMoveDistance = max(0.01f, GetCourseLength());
//compute speed per second
float fFlightTime = fMoveDistance / fMpS;
m_fFlightSpeed = 1.0f / fFlightTime;
m_fMoveSpeedMps = fMpS;
}
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;
}
