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Code Issues Releases Wiki Activity

Account for waterwalking when updating position. Otherwise we might

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trace down the actor at waterlevel at the wrong coordinate.

Triggered by multimark mod with waterwalking effect.
This commit is contained in:
fredzio 2021-04-09 19:11:26 +02:00
parent fe2a97ee39
commit 6e1c67a9ae
3 changed files with 27 additions and 26 deletions
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2
apps/openmw/mwphysics/mtphysics.cpp
View file

@ -317,7 +317,7 @@ namespace MWPhysics
// init
for (auto& data : actorsData)
data.updatePosition();
data.updatePosition(mCollisionWorld);
mPrevStepCount = numSteps;
mRemainingSteps = numSteps;
mTimeAccum = timeAccum;

47
apps/openmw/mwphysics/physicssystem.cpp
View file

@ -60,6 +60,22 @@
#include "movementsolver.hpp"
#include "mtphysics.hpp"
namespace
{
bool canMoveToWaterSurface(const MWPhysics::Actor* physicActor, const float waterlevel, btCollisionWorld* world)
{
if (!physicActor)
return false;
const float halfZ = physicActor->getHalfExtents().z();
const osg::Vec3f actorPosition = physicActor->getPosition();
const osg::Vec3f startingPosition(actorPosition.x(), actorPosition.y(), actorPosition.z() + halfZ);
const osg::Vec3f destinationPosition(actorPosition.x(), actorPosition.y(), waterlevel + halfZ);
MWPhysics::ActorTracer tracer;
tracer.doTrace(physicActor->getCollisionObject(), startingPosition, destinationPosition, world);
return (tracer.mFraction >= 1.0f);
}
}
namespace MWPhysics
{
PhysicsSystem::PhysicsSystem(Resource::ResourceSystem* resourceSystem, osg::ref_ptr<osg::Group> parentNode)
@ -347,16 +363,7 @@ namespace MWPhysics
bool PhysicsSystem::canMoveToWaterSurface(const MWWorld::ConstPtr &actor, const float waterlevel)
{
const Actor* physicActor = getActor(actor);
if (!physicActor)
return false;
const float halfZ = physicActor->getHalfExtents().z();
const osg::Vec3f actorPosition = physicActor->getPosition();
const osg::Vec3f startingPosition(actorPosition.x(), actorPosition.y(), actorPosition.z() + halfZ);
const osg::Vec3f destinationPosition(actorPosition.x(), actorPosition.y(), waterlevel + halfZ);
ActorTracer tracer;
tracer.doTrace(physicActor->getCollisionObject(), startingPosition, destinationPosition, mCollisionWorld.get());
return (tracer.mFraction >= 1.0f);
return ::canMoveToWaterSurface(getActor(actor), waterlevel, mCollisionWorld.get());
}
osg::Vec3f PhysicsSystem::getHalfExtents(const MWWorld::ConstPtr &actor) const
@ -772,16 +779,10 @@ namespace MWPhysics
const MWMechanics::MagicEffects& effects = character.getClass().getCreatureStats(character).getMagicEffects();
bool waterCollision = false;
bool moveToWaterSurface = false;
if (cell->getCell()->hasWater() && effects.get(ESM::MagicEffect::WaterWalking).getMagnitude())
{
if (!world->isUnderwater(character.getCell(), osg::Vec3f(character.getRefData().getPosition().asVec3())))
if (physicActor->getCollisionMode() || !world->isUnderwater(character.getCell(), osg::Vec3f(character.getRefData().getPosition().asVec3())))
waterCollision = true;
else if (physicActor->getCollisionMode() && canMoveToWaterSurface(character, waterlevel))
{
moveToWaterSurface = true;
waterCollision = true;
}
}
physicActor->setCanWaterWalk(waterCollision);
@ -794,7 +795,7 @@ namespace MWPhysics
if (!willSimulate)
standingOn = physicActor->getStandingOnPtr();
actorsFrameData.emplace_back(std::move(physicActor), standingOn, moveToWaterSurface, movement, slowFall, waterlevel);
actorsFrameData.emplace_back(std::move(physicActor), standingOn, waterCollision, movement, slowFall, waterlevel);
}
mMovementQueue.clear();
return actorsFrameData;
@ -937,9 +938,9 @@ namespace MWPhysics
}
ActorFrameData::ActorFrameData(const std::shared_ptr<Actor>& actor, const MWWorld::Ptr standingOn,
bool moveToWaterSurface, osg::Vec3f movement, float slowFall, float waterlevel)
bool waterCollision, osg::Vec3f movement, float slowFall, float waterlevel)
: mActor(actor), mActorRaw(actor.get()), mStandingOn(standingOn),
mDidJump(false), mNeedLand(false), mMoveToWaterSurface(moveToWaterSurface),
mDidJump(false), mNeedLand(false), mWaterCollision(waterCollision),
mWaterlevel(waterlevel), mSlowFall(slowFall), mOldHeight(0), mFallHeight(0), mMovement(movement), mPosition(), mRefpos()
{
const MWBase::World *world = MWBase::Environment::get().getWorld();
@ -953,7 +954,7 @@ namespace MWPhysics
mWasOnGround = actor->getOnGround();
}
void ActorFrameData::updatePosition()
void ActorFrameData::updatePosition(btCollisionWorld* world)
{
mActorRaw->updateWorldPosition();
// If physics runs "fast enough", position are interpolated without simulation
@ -961,10 +962,10 @@ namespace MWPhysics
// regardless of simulation speed.
mActorRaw->applyOffsetChange();
mPosition = mActorRaw->getPosition();
if (mMoveToWaterSurface)
if (mWaterCollision && mPosition.z() < mWaterlevel && canMoveToWaterSurface(mActorRaw, mWaterlevel, world))
{
mPosition.z() = mWaterlevel;
MWBase::Environment::get().getWorld()->moveObject(mActorRaw->getPtr(), mPosition.x(), mPosition.y(), mPosition.z());
MWBase::Environment::get().getWorld()->moveObject(mActorRaw->getPtr(), mPosition.x(), mPosition.y(), mPosition.z(), false);
}
mOldHeight = mPosition.z();
mRefpos = mActorRaw->getPtr().getRefData().getPosition();

4
apps/openmw/mwphysics/physicssystem.hpp
View file

@ -79,7 +79,7 @@ namespace MWPhysics
struct ActorFrameData
{
ActorFrameData(const std::shared_ptr<Actor>& actor, const MWWorld::Ptr standingOn, bool moveToWaterSurface, osg::Vec3f movement, float slowFall, float waterlevel);
void updatePosition();
void updatePosition(btCollisionWorld* world);
std::weak_ptr<Actor> mActor;
Actor* mActorRaw;
MWWorld::Ptr mStandingOn;
@ -90,7 +90,7 @@ namespace MWPhysics
bool mDidJump;
bool mFloatToSurface;
bool mNeedLand;
bool mMoveToWaterSurface;
bool mWaterCollision;
float mWaterlevel;
float mSlowFall;
float mOldHeight;