void CCameraTracking::UpdateAutoFollow(const SViewParams &viewParams, const CPlayer &hero)
{
if(g_pGameCVars->cl_cam_auto_follow_rate > 0.0f) //auto-tracking
{
//if there is an obstacle nearby, don't try to rotate into it
float lastObstacleDist = (m_vLastObstaclePos - viewParams.position).len();
if(lastObstacleDist < g_fAutoTrackObstacleDistance)
return;
if(hero.GetActorStats()->speedFlat < g_pGameCVars->cl_cam_auto_follow_movement_speed)
{
//only rotate when player moves
m_fAutoRotateSpeed = 0.0f;
return;
}
//get camera direction
Vec3 camDir = -m_pCamRayScan->GetRayDir(eRAY_CENTER);
camDir.z = 0.0f;
camDir.Normalize();
//get Player direction
Vec3 heroDirection = (hero.GetAnimatedCharacter()->GetAnimLocation().q * FORWARD_DIRECTION);
//compute angle between directions
float dt = camDir.Dot(heroDirection);
dt = clamp(dt, -1.0f, 1.0f);
float angle = cry_acosf(dt);
//check angle being bigger than threshold
if(angle > g_pGameCVars->cl_cam_auto_follow_threshold)
{
float moveSpeed = max(0.002f, gf_PI*m_fFrameTime*g_pGameCVars->cl_cam_auto_follow_rate);
m_fAutoRotateSpeed = InterpolateTo(max(0.002f, m_fAutoRotateSpeed), moveSpeed, 0.2f);
//compute rotation direction by taking height part of cross-prod
float dirVal = camDir.x * heroDirection.y - camDir.y * heroDirection.x;
CCameraInputHelper *const pCamHelper = hero.GetCameraInputHelper();
CRY_ASSERT(pCamHelper);
if(dirVal > 0) //rotate right
pCamHelper->SetTrackingDelta(-m_fAutoRotateSpeed, 0.0f);
else //rotate left
pCamHelper->SetTrackingDelta(m_fAutoRotateSpeed, 0.0f);
}
else
m_fAutoRotateSpeed = 0.0f;
}
}
void CCameraView::Reset()
{
//initialize the camera view
IViewSystem *pViewSystem = g_pGame->GetIGameFramework()->GetIViewSystem();
IView *pView = pViewSystem->GetActiveView();
CRY_ASSERT(pView);
m_lastViewParams = *(pView->GetCurrentParams());
//the player can still change camera angles etc.
CPlayer *pHero = CPlayer::GetHero();
CRY_ASSERT(pHero);
m_pCamHelper = pHero->GetCameraInputHelper();
CRY_ASSERT(m_pCamHelper);
m_bModeTransition = false;
m_fTransitionTimeout = 0.0f;
m_curPolar.SetPitch(1.f);
}
bool CCameraTracking::Update(SViewParams &viewParams, float &fHOffObstacleStrength, const SCamModeSettings &camMode, const CPlayer &hero, bool bObstacleFound /* = false */)
{
if(!g_pGameCVars->cl_cam_tracking || !m_pCamRayScan)
return false;
m_fFrameTime = max(g_fCamError, gEnv->pTimer->GetFrameTime());
//in combat mode this function doesn't really avoid obstacles, it avoids clipping
float fCombatModeWeight = 5.0f;
//default angle and minimum
const float fNow = gEnv->pTimer->GetFrameStartTime().GetSeconds();
CCameraInputHelper *pCamHelper = hero.GetCameraInputHelper();
CRY_ASSERT(pCamHelper);
float fLastUserInput = pCamHelper->GetLastUserInputTime();
//user input overrides auto-follow
if(fNow - fLastUserInput < 0.5f)
return false;
bool bTrackingActive = camMode.camType == ECT_CamFollow && (camMode.collisionType == ECCT_CollisionTrack || camMode.collisionType == ECCT_CollisionTrackOrCut);
//get current values
Vec3 curCamDir = viewParams.position-viewParams.targetPos;
m_curCamOrientation.Set(0.0f, 0.0f, 0.0f);
CartesianToSpherical(curCamDir, m_curCamOrientation);
curCamDir.Normalize();
if(m_curCamOrientation.m_fDist < g_pGameCVars->cl_cam_min_distance)
m_curCamOrientation.m_fDist = g_pGameCVars->cl_cam_min_distance;
//work in 0 .. 2PI
m_curCamOrientation.m_fYaw += gf_PI;
//if there is something in the way
if(bObstacleFound)
{
//re-start fadeout
m_fTimeCovered = 0.5f;
//set last obstacle pos
m_vLastObstaclePos = viewParams.position;
//scan obstacle
if(!IdentifyObstacle(curCamDir, hero))
return false;
}
else if(fabsf(m_fYawDelta) > g_fCamError || fabsf(m_fPitchDelta) > g_fCamError)
{
//if there is nothing in the way, fade out the movement
//time based fade
if(m_fTimeCovered > 0)
{
m_fTimeCovered = max(m_fTimeCovered - m_fFrameTime, 0.0f);
//these interpolators should be time and not frame based
m_fYawDelta = (g_fInterpolationRate * m_fYawDelta) * g_fInterpolationWeight;
m_fPitchDelta = (g_fInterpolationRate * m_fPitchDelta) * g_fInterpolationWeight;
m_fSpeed = (g_fInterpolationRate * m_fSpeed) * g_fInterpolationWeight;
}
else
{
m_fYawDelta = 0.0f;
m_fPitchDelta = 0.0f;
m_fSpeed = 0.0f;
}
}
//apply delta rotation for obstacle avoidance
if(fabsf(m_fYawDelta) > g_fCamError || fabsf(m_fPitchDelta) > g_fCamError)
{
if(bTrackingActive)
{
//set new yaw
float newYaw = m_curCamOrientation.m_fYaw + m_fYawDelta;
//re-align yaw
//the camera direction is 90 degrees off and flipped compared to entity space
newYaw = (newYaw - gf_PI * 0.5f) * -1.0f;
//set new pitch
float newPitch = m_curCamOrientation.m_fPitch + m_fPitchDelta;
if(g_pGameCVars->cl_cam_orbit != 0)
{
//pCamHelper->SetTrackingDelta(-m_fYawDelta, m_fPitchDelta);
pCamHelper->SetYawDelta(-m_fYawDelta);
pCamHelper->SetPitchDelta(m_fPitchDelta);
}
else
{
//apply yaw/pitch on camera
//pCamHelper->SetInterpolationTarget(newYaw, newPitch, gf_PI, 0.1f, 0.0f);
//this will always reset follow cam interpolation
pCamHelper->SetYawDelta(m_fYawDelta);
pCamHelper->SetPitchDelta(m_fPitchDelta);
}
}
else
{
//in orbit mode we basically simulate user input
//pCamHelper->SetTrackingDelta(-fCombatModeWeight*g_fYawDelta, fCombatModeWeight*g_fPitchDelta);
//in cutting mode we offset the camera to avoid clipping
float offsetStrength = 0.0f;
float offsetSpeed = 2.0f;
if(bObstacleFound)
{
offsetStrength = (m_fYawDelta < 0.0f)?-g_fOffsetTrackingDistance:g_fOffsetTrackingDistance;
offsetSpeed = 0.5f;
}
fHOffObstacleStrength = InterpolateTo(fHOffObstacleStrength, offsetStrength, offsetSpeed);
}
//CryLogAlways("new yaw %f, yawDelta %f", newYaw, g_yawDelta);
return true;
}
else
UpdateAutoFollow(viewParams, hero);
return false;
}