void Camera::UpdateHeroFollow( float dt )
{
//if hero hasn't moved this frame, return
Hero* hero = g_game->GetWorld()->GetHero();
if(hero->MovedLastFrame() == false)
{
return;
}
//try to focus on hero
Vec2f oldCenter = m_quad.Center();
Vec2f toHero = g_game->GetWorld()->GetHero()->GetMoveCenter() - m_quad.Center();
float oldDistance = toHero.Length();
toHero.Normalize();
m_quad.Offset(toHero * kCameraMoveSpeed * dt);
float distanceMoved = (m_quad.Center() - oldCenter).Length();
if(distanceMoved > oldDistance)
{
//overshoot
m_quad.SetCenter(g_game->GetWorld()->GetHero()->GetMoveCenter());
}
//constrain to room
m_quad.ClipInsideOtherQuad(m_room->RoomQuad());
}
void Camera::UpdateDestination( float dt )
{
//move if necessary
if(m_hasDestination)
{
Vec2f toDestination = m_destinationPosition - m_quad.Center();
float distanceRemaning = toDestination.Length();
float moveStep = kCameraMoveSpeed * dt;
bool doneMoving = false;
if(moveStep > distanceRemaning)
{
moveStep = distanceRemaning;
m_hasDestination = false; //we're there
}
Vec2f direction = toDestination;
direction.Normalize();
Vec2f oldPosition = m_quad.Center();
//movestep
m_quad.SetLowerLeft(m_quad.LowerLeft() + direction * moveStep);
}
}
void FireProjectileAction::fire(const Vec2f& _source, const Vec2f& _position)
{
Vec2f direction = _position - _source;
direction.Normalize();
Vec2f position = _source;
position += direction*3;
FactoryParameters _parameters;
_parameters.add<Vec2f>("position", position);
_parameters.add<Vec2f>("velocity", direction*100);
immutableData.projectileFactory->use(&_parameters, nullptr);
}
// CORRECTNESS: not calculating tangents across closed rotoPaths
Vec2f AbstractPath::tangent(const int i) const {
assert(i>=0 && i<getNumElements());
if (_tangents)
return _tangents[i];
Vec2f U;
if (i==0)
Vec2f_Sub(U,getElement(1), getElement(0));
else if (i==getNumElements()-1)
Vec2f_Sub(U,getElement(getNumElements()-1),
getElement(getNumElements()-2));
else {
Vec2f_Sub(U,getElement(i+1), getElement(i-1));
}
U.Normalize();
return U;
}