But my circular motion animator stops animating while the camera is on the move... am I doing something wrong?
Here's my code:
Code: Select all
_levelStartTime = _timer->getRealTime();
unsigned int lastFrameTime = _timer->getRealTime();
bool isPlayerPossingCamera = false;
//first run while _finishPointWatchTime has not elapsed yet, than wait for player to
//possess the camera, and finaly wait for the camera to finish it's movement.
while (((_timer->getRealTime() - _finishPointWatchTime < _levelStartTime || !isPlayerPossingCamera)
&& _device->run()) || _camera.isMoving())
{
if ((_timer->getRealTime() - _finishPointWatchTime >= _levelStartTime)
&& !isPlayerPossingCamera)
{
isPlayerPossingCamera = true;
if (_playerViews.size())
_playerViews.front().possesCamera(&_camera);
}
_videoDriver->beginScene(true, true, irr::video::SColor(255, 100, 101, 140));
_sceneManager->drawAll();
_guiEnvironment->drawAll();
_videoDriver->endScene();
unsigned int dt = _timer->getRealTime() - lastFrameTime;
if (dt < _minTimeBetweenFrames*1000.0f)
_device->sleep((_minTimeBetweenFrames*1000.0f) - dt);
dt = _timer->getRealTime() - lastFrameTime;
_camera.evolve(static_cast<float>(dt) / 1000.0f);
lastFrameTime = _timer->getRealTime();
}the possesCamera function set a new target for the camera controller, and the camera.evolve function simply flies the camera to the appropriate position while maintaining the position-target vector constant.
Code: Select all
void CCameraController::evolve(float deltaT)
{
if (_isPositionNeedsModifying)
{
//accelerate until x = 0.5v^2/a
irr::core::vector3df currentPosition = _camera->getPosition();
float reminingDistance = currentPosition.getDistanceFrom(_desiredPos);
if (reminingDistance > 0.5 * _positionTransitionSpeed*_positionTransitionSpeed / Acceleratoin)
if (_positionTransitionSpeed + Acceleratoin*deltaT < MaxSpeed)
_positionTransitionSpeed += Acceleratoin*deltaT;
else
_positionTransitionSpeed = MaxSpeed;
else if (_positionTransitionSpeed - Acceleratoin*deltaT > 0)
_positionTransitionSpeed -= Acceleratoin*deltaT;
else
_positionTransitionSpeed = 0;
if (reminingDistance <= _positionTransitionSpeed * deltaT)
{
_camera->setPosition(_desiredPos);
_isPositionNeedsModifying = false;
}
else
{
_camera->setPosition(_camera->getPosition() + _posChangeDir * _positionTransitionSpeed * deltaT);
}
currentPosition = _camera->getPosition();
}
if (_isTargetNeedsModifying)
{
irr::core::vector3df currentTarget = _camera->getTarget();
float reminingDistance = currentTarget.getDistanceFrom(_desiredTarget);
//accelerate until x = 0.5v^2/a
if (reminingDistance > 0.5 * _targetTransitionSpeed*_targetTransitionSpeed / Acceleratoin)
if (_targetTransitionSpeed + Acceleratoin*deltaT < MaxSpeed)
_targetTransitionSpeed += Acceleratoin*deltaT;
else
_targetTransitionSpeed = MaxSpeed;
else if (_targetTransitionSpeed - Acceleratoin*deltaT > 0)
_targetTransitionSpeed -= Acceleratoin*deltaT;
else
_targetTransitionSpeed = 0;
if (reminingDistance <= _targetTransitionSpeed * deltaT)
{
_camera->setTarget(_desiredTarget);
_isTargetNeedsModifying = false;
}
else
{
_camera->setTarget(_camera->getTarget() + _targetChangeDir * _targetTransitionSpeed * deltaT);
}
}
if (_isPositionNeedsModifying || _isTargetNeedsModifying)
{
if (_posToTarget.crossProduct(_desiredUpVector) != _leftVector)
{
_camera->setUpVector(_leftVector.crossProduct(_posToTarget));
}
}
}