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Fix for framerate-dependent maximum stepping distance (Bug #1638)

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This commit is contained in:
scrawl 2015-01-02 00:34:16 +01:00
parent 4a734f5cd3
commit 593ca6bd48
1 changed files with 8 additions and 8 deletions
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16
apps/openmw/mwworld/physicssystem.cpp
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@ -108,7 +108,7 @@ namespace MWWorld
}
static bool stepMove(btCollisionObject *colobj, Ogre::Vector3 &position,
const Ogre::Vector3 &velocity, float &remainingTime,
const Ogre::Vector3 &toMove, float &remainingTime,
OEngine::Physic::PhysicEngine *engine)
{
/*
@ -124,7 +124,7 @@ namespace MWWorld
* If not successful return 'false'. May fail for these reasons:
* - can't move directly up from current position
* - having moved up by between epsilon() and sStepSize, can't move forward
* - having moved forward by between epsilon() and velocity*remainingTime,
* - having moved forward by between epsilon() and toMove,
* = moved down between 0 and just under sStepSize but slope was too steep, or
* = moved the full sStepSize down (FIXME: this could be a bug)
*
@ -133,7 +133,7 @@ namespace MWWorld
* Starting position. Obstacle or stairs with height upto sStepSize in front.
*
* +--+ +--+ |XX
* | | -------> velocity | | +--+XX
* | | -------> toMove | | +--+XX
* | | | | |XXXXX
* | | +--+ | | +--+XXXXX
* | | |XX| | | |XXXXXXXX
@ -171,11 +171,11 @@ namespace MWWorld
* | |
* <------------------->| |
* +--+ +--+
* |XX| the moved amount is velocity*remainingTime*tracer.mFraction
* |XX| the moved amount is toMove*tracer.mFraction
* +--+
* ==============================================
*/
tracer.doTrace(colobj, stepper.mEndPos, stepper.mEndPos + velocity*remainingTime, engine);
tracer.doTrace(colobj, stepper.mEndPos, stepper.mEndPos + toMove, engine);
if(tracer.mFraction < std::numeric_limits<float>::epsilon())
return false; // didn't even move the smallest representable amount
@ -428,9 +428,9 @@ namespace MWWorld
Ogre::Vector3 oldPosition = newPosition;
// We hit something. Try to step up onto it. (NOTE: stepMove does not allow stepping over)
// NOTE: stepMove modifies newPosition if successful
bool result = stepMove(colobj, newPosition, velocity, remainingTime, engine);
if (!result)
result = stepMove(colobj, newPosition, velocity.normalisedCopy()*300.f, remainingTime, engine);
bool result = stepMove(colobj, newPosition, velocity*remainingTime, remainingTime, engine);
if (!result) // to make sure the maximum stepping distance isn't framerate-dependent or movement-speed dependent
result = stepMove(colobj, newPosition, velocity.normalisedCopy()*10.f, remainingTime, engine);
if(result)
{
// don't let pure water creatures move out of water after stepMove