void setRotation(core::quaternion & q)
{
core::vector3df euler;
q.toEuler(euler);
euler.X = core::radToDeg(euler.X);
euler.Y = core::radToDeg(euler.Y);
euler.Z = core::radToDeg(euler.Z);
m_lightNode->setRotation(euler);
}
/** Update, called once per timestep.
* \param dt Time step size.
*/
void SlipStream::update(float dt)
{
MovingTexture::update(dt);
// Update this karts slipstream quad (even for low level AI which don't
// use slipstream, since even then player karts can get slipstream,
// and so have to compare with the modified slipstream quad.
m_slipstream_original_quad->transform(m_kart->getTrans(),
m_slipstream_quad);
if(m_slipstream_mode==SS_USE)
{
m_slipstream_time -= dt;
if(m_slipstream_time<0) m_slipstream_mode=SS_NONE;
}
updateSlipstreamPower();
// If this kart is too slow for slipstreaming taking effect, do nothing
// --------------------------------------------------------------------
// Define this to get slipstream effect shown even when the karts are
// not moving. This is useful for debugging the graphics of SS-ing.
#undef DISPLAY_SLIPSTREAM_WITH_0_SPEED_FOR_DEBUGGING
#ifndef DISPLAY_SLIPSTREAM_WITH_0_SPEED_FOR_DEBUGGING
if(m_kart->getSpeed()<m_kart->getKartProperties()->getSlipstreamMinSpeed())
{
setIntensity(0, NULL);
m_slipstream_mode = SS_NONE;
if(UserConfigParams::m_slipstream_debug)
setDebugColor(video::SColor(255, 0, 0, 0));
return;
}
#endif
// Then test if this kart is in the slipstream range of another kart:
// ------------------------------------------------------------------
World *world = World::getWorld();
unsigned int num_karts = world->getNumKarts();
bool is_sstreaming = false;
m_target_kart = NULL;
// Note that this loop can not be simply replaced with a shorter loop
// using only the karts with a better position - since a kart might
// be a lap behind
for(unsigned int i=0; i<num_karts; i++)
{
m_target_kart= world->getKart(i);
// Don't test for slipstream with itself, a kart that is being
// rescued or exploding, or an eliminated kart
if(m_target_kart==m_kart ||
m_target_kart->getKartAnimation() ||
m_target_kart->isEliminated() ) continue;
float diff = fabsf(m_target_kart->getXYZ().getY()
- m_kart->getXYZ().getY() );
// If the kart is 'on top' of this kart (e.g. up on a bridge),
// don't consider it for slipstreaming.
if(diff>6.0f) continue;
// If the kart we are testing against is too slow, no need to test
// slipstreaming. Note: We compare the speed of the other kart
// against the minimum slipstream speed kart of this kart - not
// entirely sure if this makes sense, but it makes it easier to
// give karts different slipstream properties.
#ifndef DISPLAY_SLIPSTREAM_WITH_0_SPEED_FOR_DEBUGGING
if(m_target_kart->getSpeed() <
m_kart->getKartProperties()->getSlipstreamMinSpeed())
{
if(UserConfigParams::m_slipstream_debug &&
m_kart->getController()->isPlayerController())
m_target_kart->getSlipstream()
->setDebugColor(video::SColor(255, 0, 0, 0));
continue;
}
#endif
// Quick test: the kart must be not more than
// slipstream length+0.5*kart_length()+0.5*target_kart_length
// away from the other kart
Vec3 delta = m_kart->getXYZ() - m_target_kart->getXYZ();
float l = m_target_kart->getKartProperties()->getSlipstreamLength()
+ 0.5f*( m_target_kart->getKartLength()
+m_kart->getKartLength() );
if(delta.length2_2d() > l*l)
{
if(UserConfigParams::m_slipstream_debug &&
m_kart->getController()->isPlayerController())
m_target_kart->getSlipstream()
->setDebugColor(video::SColor(255, 0, 0, 128));
continue;
}
// Real test: if in slipstream quad of other kart
if(m_target_kart->getSlipstream()->m_slipstream_quad
->pointInQuad(m_kart->getXYZ()))
{
is_sstreaming = true;
break;
}
if(UserConfigParams::m_slipstream_debug &&
m_kart->getController()->isPlayerController())
m_target_kart->getSlipstream()
->setDebugColor(video::SColor(255, 0, 0, 255));
} // for i < num_karts
if(!is_sstreaming)
{
if(UserConfigParams::m_slipstream_debug &&
m_kart->getController()->isPlayerController())
m_target_kart->getSlipstream()
->setDebugColor(video::SColor(255, 255, 0, 0));
if(isSlipstreamReady())
{
// The first time slipstream is ready after collecting
// and you are leaving the slipstream area, you get a
// zipper bonus.
if(m_slipstream_mode==SS_COLLECT)
{
m_slipstream_mode = SS_USE;
m_kart->handleZipper();
m_slipstream_time =
m_kart->getKartProperties()->getSlipstreamCollectTime();
return;
}
}
m_slipstream_time -=dt;
if(m_slipstream_time<0) m_slipstream_mode = SS_NONE;
setIntensity(0, NULL);
return;
} // if !is_sstreaming
if(UserConfigParams::m_slipstream_debug &&
m_kart->getController()->isPlayerController())
m_target_kart->getSlipstream()->setDebugColor(video::SColor(255, 0, 255, 0));
// Accumulate slipstream credits now
m_slipstream_time = m_slipstream_mode==SS_NONE ? dt
: m_slipstream_time+dt;
if(isSlipstreamReady())
m_kart->setSlipstreamEffect(9.0f);
setIntensity(m_slipstream_time, m_target_kart);
m_slipstream_mode = SS_COLLECT;
if(m_slipstream_time>m_kart->getKartProperties()->getSlipstreamCollectTime())
{
setIntensity(1.0f, m_target_kart);
}
return;
core::vector3df pos = m_kart->getNode()->getPosition();
pos.Y = m_kart->getHoT()+0.2f;
m_node->setPosition(pos);
core::vector3df f = core::vector3df(0, 0, 10) - f;
core::vector3df r = f.getHorizontalAngle();
m_node->setRotation(r);
return;
const core::quaternion new_rot(m_kart->getNode()->getRotation());
const core::quaternion old_rot(m_node->getRotation() );
core::quaternion interpo;
core::vector3df interp;
new_rot.toEuler(interp);
m_node->setRotation(interp);
} // update