bool MWMechanics::AiPackage::pathTo(const MWWorld::Ptr& actor, ESM::Pathgrid::Point dest, float duration)
{
//Update various Timers
mTimer += duration; //Update timer
ESM::Position pos = actor.getRefData().getPosition(); //position of the actor
/// Stops the actor when it gets too close to a unloaded cell
//... At current time, this test is unnecessary. AI shuts down when actor is more than 7168
//... units from player, and exterior cells are 8192 units long and wide.
//... But AI processing distance may increase in the future.
if (isNearInactiveCell(pos))
{
actor.getClass().getMovementSettings(actor).mPosition[1] = 0;
return false;
}
//***********************
/// Checks if you can't get to the end position at all, adds end position to end of path
/// Rebuilds path every quarter of a second, in case the target has moved
//***********************
if(mTimer > 0.25)
{
const ESM::Cell *cell = actor.getCell()->getCell();
if (doesPathNeedRecalc(dest, cell)) { //Only rebuild path if it's moved
mPathFinder.buildSyncedPath(pos.pos, dest, actor.getCell(), true); //Rebuild path, in case the target has moved
mPrevDest = dest;
}
if(!mPathFinder.getPath().empty()) //Path has points in it
{
ESM::Pathgrid::Point lastPos = mPathFinder.getPath().back(); //Get the end of the proposed path
if(distance(dest, lastPos) > 100) //End of the path is far from the destination
mPathFinder.addPointToPath(dest); //Adds the final destination to the path, to try to get to where you want to go
}
mTimer = 0;
}
//************************
/// Checks if you aren't moving; attempts to unstick you
//************************
if(mPathFinder.checkPathCompleted(pos.pos[0],pos.pos[1])) //Path finished?
{
// Reset mTimer so that path will be built right away when a package is repeated
mTimer = 0.26f;
return true;
}
else
{
evadeObstacles(actor, duration, pos);
}
return false;
}
bool MWMechanics::AiPackage::pathTo(const MWWorld::Ptr& actor, const ESM::Pathgrid::Point& dest, float duration, float destTolerance)
{
mTimer += duration; //Update timer
ESM::Position pos = actor.getRefData().getPosition(); //position of the actor
/// Stops the actor when it gets too close to a unloaded cell
//... At current time, this test is unnecessary. AI shuts down when actor is more than 7168
//... units from player, and exterior cells are 8192 units long and wide.
//... But AI processing distance may increase in the future.
if (isNearInactiveCell(pos))
{
actor.getClass().getMovementSettings(actor).mPosition[1] = 0;
return false;
}
// handle path building and shortcutting
ESM::Pathgrid::Point start = pos.pos;
float distToTarget = distance(start, dest);
bool isDestReached = (distToTarget <= destTolerance);
if (!isDestReached && mTimer > AI_REACTION_TIME)
{
bool wasShortcutting = mIsShortcutting;
bool destInLOS = false;
if (getTypeId() != TypeIdWander) // prohibit shortcuts for AiWander
mIsShortcutting = shortcutPath(start, dest, actor, &destInLOS); // try to shortcut first
if (!mIsShortcutting)
{
if (wasShortcutting || doesPathNeedRecalc(dest, actor.getCell())) // if need to rebuild path
{
mPathFinder.buildSyncedPath(start, dest, actor.getCell());
mRotateOnTheRunChecks = 3;
// give priority to go directly on target if there is minimal opportunity
if (destInLOS && mPathFinder.getPath().size() > 1)
{
// get point just before dest
std::list<ESM::Pathgrid::Point>::const_iterator pPointBeforeDest = mPathFinder.getPath().end();
--pPointBeforeDest;
--pPointBeforeDest;
// if start point is closer to the target then last point of path (excluding target itself) then go straight on the target
if (distance(start, dest) <= distance(dest, *pPointBeforeDest))
{
mPathFinder.clearPath();
mPathFinder.addPointToPath(dest);
}
}
}
if (!mPathFinder.getPath().empty()) //Path has points in it
{
ESM::Pathgrid::Point lastPos = mPathFinder.getPath().back(); //Get the end of the proposed path
if(distance(dest, lastPos) > 100) //End of the path is far from the destination
mPathFinder.addPointToPath(dest); //Adds the final destination to the path, to try to get to where you want to go
}
}
mTimer = 0;
}
if (isDestReached || mPathFinder.checkPathCompleted(pos.pos[0], pos.pos[1])) // if path is finished
{
// turn to destination point
zTurn(actor, getZAngleToPoint(start, dest));
smoothTurn(actor, getXAngleToPoint(start, dest), 0);
return true;
}
else
{
if (mRotateOnTheRunChecks == 0
|| isReachableRotatingOnTheRun(actor, *mPathFinder.getPath().begin())) // to prevent circling around a path point
{
actor.getClass().getMovementSettings(actor).mPosition[1] = 1; // move to the target
if (mRotateOnTheRunChecks > 0) mRotateOnTheRunChecks--;
}
// handle obstacles on the way
evadeObstacles(actor, duration, pos);
}
// turn to next path point by X,Z axes
zTurn(actor, mPathFinder.getZAngleToNext(pos.pos[0], pos.pos[1]));
smoothTurn(actor, mPathFinder.getXAngleToNext(pos.pos[0], pos.pos[1], pos.pos[2]), 0);
return false;
}
