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44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
#include "steering.hpp"
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#include "../mwworld/class.hpp"
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#include "../mwworld/ptr.hpp"
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#include "../mwbase/environment.hpp"
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#include "movement.hpp"
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namespace MWMechanics
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{
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bool zTurn(const MWWorld::Ptr& actor, Ogre::Radian targetAngle)
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{
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Ogre::Radian currentAngle (actor.getRefData().getPosition().rot[2]);
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Ogre::Radian diff (targetAngle - currentAngle);
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if (diff >= Ogre::Degree(180))
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{
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// Turning the other way would be a better idea
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diff = diff-Ogre::Degree(360);
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}
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else if (diff <= Ogre::Degree(-180))
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{
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diff = Ogre::Degree(360)-diff;
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}
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Ogre::Radian absDiff = Ogre::Math::Abs(diff);
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// The turning animation actually moves you slightly, so the angle will be wrong again.
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// Use epsilon to prevent jerkiness.
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const Ogre::Degree epsilon (0.5);
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if (absDiff < epsilon)
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return true;
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// Max. speed of 10 radian per sec
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Ogre::Radian limit = Ogre::Radian(10) * MWBase::Environment::get().getFrameDuration();
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if (absDiff > limit)
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diff = Ogre::Math::Sign(diff) * limit;
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actor.getClass().getMovementSettings(actor).mRotation[2] = diff.valueRadians();
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return false;
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}
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}
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