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Use duration rather than frame counts. Stops false detection of being "stuck" with high frame rates (e.g. indoors).

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This commit is contained in:
cc9cii 2014-04-03 07:46:26 +11:00
parent c9f9566623
commit f597d3e88b
2 changed files with 29 additions and 17 deletions
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43
apps/openmw/mwmechanics/aiwander.cpp
View file

@ -18,9 +18,10 @@
namespace MWMechanics
{
// NOTE: determined empirically but probably need further tweaking
static const int COUNT_BEFORE_STUCK = 20;
static const int COUNT_BEFORE_RESET = 200;
static const int COUNT_EVADE = 7;
static const float DIST_SAME_SPOT = 1.8f;
static const float DURATION_SAME_SPOT = 1.0f;
static const float DURATION_TO_EVADE = 0.4f;
AiWander::AiWander(int distance, int duration, int timeOfDay, const std::vector<int>& idle, bool repeat):
mDistance(distance), mDuration(duration), mTimeOfDay(timeOfDay), mIdle(idle), mRepeat(repeat)
@ -35,7 +36,8 @@ namespace MWMechanics
, mPrevY(0)
, mWalkState(State_Norm)
, mStuckCount(0)
, mEvadeCount(0)
, mEvadeDuration(0)
, mStuckDuration(0)
, mSaidGreeting(false)
{
for(unsigned short counter = 0; counter < mIdle.size(); counter++)
@ -325,15 +327,21 @@ namespace MWMechanics
}
else
{
/* 1 n
/* f t
* State_Norm <---> State_CheckStuck --> State_Evade
* ^ ^ | ^ | ^ | |
* | | | | | | | |
* | +---+ +---+ +---+ | m
* | any < n < m |
* | +---+ +---+ +---+ | u
* | any < t < u |
* +--------------------------------------------+
*
* f = one frame
* t = how long before considered stuck
* u = how long to move sideways
*/
bool samePosition = (abs(pos.pos[0] - mPrevX) < 1) && (abs(pos.pos[1] - mPrevY) < 1);
bool samePosition = (abs(pos.pos[0] - mPrevX) < DIST_SAME_SPOT) &&
(abs(pos.pos[1] - mPrevY) < DIST_SAME_SPOT);
switch(mWalkState)
{
case State_Norm:
@ -349,30 +357,33 @@ namespace MWMechanics
if(!samePosition)
{
mWalkState = State_Norm;
// to do this properly need yet another variable, simply don't clear for now
//mStuckCount = 0;
mStuckDuration = 0;
break;
}
else
{
// consider stuck only if position unchanges consecutively
if((mStuckCount++ % COUNT_BEFORE_STUCK) == 0)
mStuckDuration += duration;
// consider stuck only if position unchanges for a period
if(mStuckDuration > DURATION_SAME_SPOT)
{
mWalkState = State_Evade;
// NOTE: mStuckCount is purposely not cleared here
mStuckDuration = 0;
mStuckCount++;
}
else
break; // still in the same state, but counter got incremented
break; // still in the same state, but duration added to timer
}
}
/* FALL THROUGH */
case State_Evade:
{
if(mEvadeCount++ < COUNT_EVADE)
mEvadeDuration += duration;
if(mEvadeDuration < DURATION_TO_EVADE)
break;
else
{
mWalkState = State_Norm; // tried to evade, assume all is ok and start again
// NOTE: mStuckCount is purposely not cleared here
mEvadeCount = 0;
mEvadeDuration = 0;
}
}
/* NO DEFAULT CASE */

3
apps/openmw/mwmechanics/aiwander.hpp
View file

@ -58,7 +58,8 @@ namespace MWMechanics
WalkState mWalkState;
int mStuckCount;
int mEvadeCount;
float mStuckDuration;
float mEvadeDuration;
bool mStoredAvailableNodes;
bool mChooseAction;