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openmw-tes3mp/apps/openmw/mwmechanics/steering.cpp

43 lines
1.1 KiB
C++

#include "steering.hpp"
#include "../mwworld/class.hpp"
#include "../mwworld/ptr.hpp"
#include "../mwbase/environment.hpp"
#include "movement.hpp"
namespace MWMechanics
{
bool zTurn(const MWWorld::Ptr& actor, Ogre::Radian targetAngle)
{
Ogre::Radian currentAngle (actor.getRefData().getPosition().rot[2]);
Ogre::Radian diff (targetAngle - currentAngle);
if (diff >= Ogre::Degree(180))
{
// Turning the other way would be a better idea
diff = diff-Ogre::Degree(360);
}
else if (diff <= Ogre::Degree(-180))
{
diff = Ogre::Degree(360)-diff;
}
Ogre::Radian absDiff = Ogre::Math::Abs(diff);
// The turning animation actually moves you slightly, so the angle will be wrong again.
// Use epsilon to prevent jerkiness.
const Ogre::Degree epsilon (0.5);
if (absDiff < epsilon)
return true;
Ogre::Radian limit = MAX_VEL_ANGULAR * MWBase::Environment::get().getFrameDuration();
if (absDiff > limit)
diff = Ogre::Math::Sign(diff) * limit;
actor.getClass().getMovementSettings(actor).mRotation[2] = diff.valueRadians();
return false;
}
}