// Update the "looking around" behavior.
void CCSBot::UpdateLookAround(bool updateNow)
{
// check if looking around has been inhibited
// Moved inhibit to allow high priority enemy lookats to still occur
if (gpGlobals->time < m_inhibitLookAroundTimestamp)
return;
const float recentThreatTime = 0.25f; // 1.0f;
// Unless we can hear them moving, in which case look towards the noise
if (!IsEnemyVisible())
{
const float noiseStartleRange = 1000.0f;
if (CanHearNearbyEnemyGunfire(noiseStartleRange))
{
Vector spot = m_noisePosition;
spot.z += HalfHumanHeight;
SetLookAt("Check dangerous noise", &spot, PRIORITY_HIGH, recentThreatTime);
InhibitLookAround(RANDOM_FLOAT(2.0f, 4.0f));
return;
}
}
// If we recently saw an enemy, look towards where we last saw them
if (!IsLookingAtSpot(PRIORITY_MEDIUM) && gpGlobals->time - m_lastSawEnemyTimestamp < recentThreatTime)
{
ClearLookAt();
Vector spot = m_lastEnemyPosition;
// find enemy position on the ground
if (GetSimpleGroundHeight(&m_lastEnemyPosition, &spot.z))
{
spot.z += HalfHumanHeight;
SetLookAt("Last Enemy Position", &spot, PRIORITY_MEDIUM, RANDOM_FLOAT(2.0f, 3.0f), true);
return;
}
}
// Look at nearby enemy noises
if (UpdateLookAtNoise())
return;
if (IsNotMoving())
{
// if we're sniping, zoom in to watch our approach points
if (IsUsingSniperRifle())
{
// low skill bots don't pre-zoom
if (GetProfile()->GetSkill() > 0.4f)
{
if (!IsViewMoving())
{
float range = ComputeWeaponSightRange();
AdjustZoom(range);
}
else
{
// zoom out
if (GetZoomLevel() != NO_ZOOM)
SecondaryAttack();
}
}
}
if (m_lastKnownArea == NULL)
return;
if (gpGlobals->time < m_lookAroundStateTimestamp)
return;
// if we're sniping, switch look-at spots less often
if (IsUsingSniperRifle())
m_lookAroundStateTimestamp = gpGlobals->time + RANDOM_FLOAT(5.0f, 10.0f);
else
m_lookAroundStateTimestamp = gpGlobals->time + RANDOM_FLOAT(1.0f, 2.0f);
if (m_approachPointCount == 0)
{
ClearLookAt();
return;
}
int which = RANDOM_LONG(0, m_approachPointCount - 1);
Vector spot = m_approachPoint[ which ];
// don't look at the floor, look roughly at chest level
// TODO: If this approach point is very near, this will cause us to aim up in the air if were crouching
spot.z += HalfHumanHeight;
SetLookAt("Approach Point (Hiding)", &spot, PRIORITY_LOW);
return;
}
// Glance at "encouter spots" as we move past them
if (m_spotEncounter)
{
// Check encounter spots
if (!IsSafe() && !IsLookingAtSpot(PRIORITY_LOW))
{
// allow a short time to look where we're going
if (gpGlobals->time < m_spotCheckTimestamp)
return;
// TODO: Use skill parameter instead of accuracy
// lower skills have exponentially longer delays
float_precision asleep = (1.0f - GetProfile()->GetSkill());
asleep *= asleep;
asleep *= asleep;
m_spotCheckTimestamp = gpGlobals->time + asleep * RANDOM_FLOAT(10.0f, 30.0f);
// figure out how far along the path segment we are
Vector delta = m_spotEncounter->path.to - m_spotEncounter->path.from;
float_precision length = delta.Length();
float adx = float(Q_abs(int64(delta.x)));
float ady = float(Q_abs(int64(delta.y)));
float_precision t;
if (adx > ady)
t = (pev->origin.x - m_spotEncounter->path.from.x) / delta.x;
else
t = (pev->origin.y - m_spotEncounter->path.from.y) / delta.y;
// advance parameter a bit so we "lead" our checks
const float leadCheckRange = 50.0f;
t += leadCheckRange / length;
if (t < 0.0f)
t = 0.0f;
else if (t > 1.0f)
t = 1.0f;
// collect the unchecked spots so far
const int MAX_DANGER_SPOTS = 8;
HidingSpot *dangerSpot[MAX_DANGER_SPOTS];
int dangerSpotCount = 0;
int dangerIndex = 0;
const float checkTime = 10.0f;
const SpotOrder *spotOrder;
for (SpotOrderList::iterator iter = m_spotEncounter->spotList.begin(); iter != m_spotEncounter->spotList.end(); ++iter)
{
spotOrder = &(*iter);
// if we have seen this spot recently, we don't need to look at it
if (gpGlobals->time - GetHidingSpotCheckTimestamp(spotOrder->spot) <= checkTime)
continue;
if (spotOrder->t > t)
break;
dangerSpot[ dangerIndex++ ] = spotOrder->spot;
if (dangerIndex >= MAX_DANGER_SPOTS)
dangerIndex = 0;
if (dangerSpotCount < MAX_DANGER_SPOTS)
++dangerSpotCount;
}
if (dangerSpotCount)
{
// pick one of the spots at random
int which = RANDOM_LONG(0, dangerSpotCount - 1);
const Vector *checkSpot = dangerSpot[ which ]->GetPosition();
Vector pos = *checkSpot;
pos.z += HalfHumanHeight;
// glance at the spot for minimum time
SetLookAt("Encounter Spot", &pos, PRIORITY_LOW, 0, true, 10.0f);
// immediately mark it as "checked", so we don't check it again
// if we get distracted before we check it - that's the way it goes
SetHidingSpotCheckTimestamp(dangerSpot[which]);
}
}
}
}
// Move along the path. Return false if end of path reached.
CCSBot::PathResult CCSBot::UpdatePathMovement(bool allowSpeedChange)
{
if (m_pathLength == 0)
return PATH_FAILURE;
if (cv_bot_walk.value != 0.0f)
Walk();
// If we are navigating a ladder, it overrides all other path movement until complete
if (UpdateLadderMovement())
return PROGRESSING;
// ladder failure can destroy the path
if (m_pathLength == 0)
return PATH_FAILURE;
// we are not supposed to be on a ladder - if we are, jump off
if (IsOnLadder())
Jump(MUST_JUMP);
assert(m_pathIndex < m_pathLength);
// Check if reached the end of the path
bool nearEndOfPath = false;
if (m_pathIndex >= m_pathLength - 1)
{
Vector toEnd(pev->origin.x, pev->origin.y, GetFeetZ());
Vector d = GetPathEndpoint() - toEnd; // can't use 2D because path end may be below us (jump down)
const float walkRange = 200.0f;
// walk as we get close to the goal position to ensure we hit it
if (d.IsLengthLessThan(walkRange))
{
// don't walk if crouching - too slow
if (allowSpeedChange && !IsCrouching())
Walk();
// note if we are near the end of the path
const float nearEndRange = 50.0f;
if (d.IsLengthLessThan(nearEndRange))
nearEndOfPath = true;
const float closeEpsilon = 20.0f;
if (d.IsLengthLessThan(closeEpsilon))
{
// reached goal position - path complete
DestroyPath();
// TODO: We should push and pop walk state here, in case we want to continue walking after reaching goal
if (allowSpeedChange)
Run();
return END_OF_PATH;
}
}
}
// To keep us moving smoothly, we will move towards
// a point farther ahead of us down our path.
int prevIndex = 0; // closest index on path just prior to where we are now
const float aheadRange = 300.0f;
int newIndex = FindPathPoint(aheadRange, &m_goalPosition, &prevIndex);
// BOTPORT: Why is prevIndex sometimes -1?
if (prevIndex < 0)
prevIndex = 0;
// if goal position is near to us, we must be about to go around a corner - so look ahead!
const float nearCornerRange = 100.0f;
if (m_pathIndex < m_pathLength - 1 && (m_goalPosition - pev->origin).IsLengthLessThan(nearCornerRange))
{
ClearLookAt();
InhibitLookAround(0.5f);
}
// if we moved to a new node on the path, setup movement
if (newIndex > m_pathIndex)
{
SetPathIndex(newIndex);
}
if (!IsUsingLadder())
{
// Crouching
// if we are approaching a crouch area, crouch
// if there are no crouch areas coming up, stand
const float crouchRange = 50.0f;
bool didCrouch = false;
for (int i = prevIndex; i < m_pathLength; i++)
{
const CNavArea *to = m_path[i].area;
// if there is a jump area on the way to the crouch area, don't crouch as it messes up the jump
// unless we are already higher than the jump area - we must've jumped already but not moved into next area
if ((to->GetAttributes() & NAV_JUMP)/* && to->GetCenter()->z > GetFeetZ()*/)
break;
Vector close;
to->GetClosestPointOnArea(&pev->origin, &close);
if ((close - pev->origin).Make2D().IsLengthGreaterThan(crouchRange))
break;
if (to->GetAttributes() & NAV_CROUCH)
{
Crouch();
didCrouch = true;
break;
}
}
if (!didCrouch && !IsJumping())
{
// no crouch areas coming up
StandUp();
}
// end crouching logic
}
// compute our forward facing angle
m_forwardAngle = UTIL_VecToYaw(m_goalPosition - pev->origin);
// Look farther down the path to "lead" our view around corners
Vector toGoal;
if (m_pathIndex == 0)
{
toGoal = m_path[1].pos;
}
else if (m_pathIndex < m_pathLength)
{
toGoal = m_path[m_pathIndex].pos - pev->origin;
// actually aim our view farther down the path
const float lookAheadRange = 500.0f;
if (!m_path[m_pathIndex].ladder && !IsNearJump() && toGoal.Make2D().IsLengthLessThan(lookAheadRange))
{
float along = toGoal.Length2D();
int i;
for (i = m_pathIndex + 1; i < m_pathLength; i++)
{
Vector delta = m_path[i].pos - m_path[i - 1].pos;
float segmentLength = delta.Length2D();
if (along + segmentLength >= lookAheadRange)
{
// interpolate between points to keep look ahead point at fixed distance
float t = (lookAheadRange - along) / (segmentLength + along);
Vector target;
if (t <= 0.0f)
target = m_path[i - 1].pos;
else if (t >= 1.0f)
target = m_path[i].pos;
else
target = m_path[i - 1].pos + t * delta;
toGoal = target - pev->origin;
break;
}
// if we are coming up to a ladder or a jump, look at it
if (m_path[i].ladder || (m_path[i].area->GetAttributes() & NAV_JUMP))
{
toGoal = m_path[i].pos - pev->origin;
break;
}
along += segmentLength;
}
if (i == m_pathLength)
{
toGoal = GetPathEndpoint() - pev->origin;
}
}
}
else
{
toGoal = GetPathEndpoint() - pev->origin;
}
m_lookAheadAngle = UTIL_VecToYaw(toGoal);
// initialize "adjusted" goal to current goal
Vector adjustedGoal = m_goalPosition;
// Use short "feelers" to veer away from close-range obstacles
// Feelers come from our ankles, just above StepHeight, so we avoid short walls, too
// Don't use feelers if very near the end of the path, or about to jump
// TODO: Consider having feelers at several heights to deal with overhangs, etc.
if (!nearEndOfPath && !IsNearJump() && !IsJumping())
{
FeelerReflexAdjustment(&adjustedGoal);
}
// draw debug visualization
if ((cv_bot_traceview.value == 1.0f && IsLocalPlayerWatchingMe()) || cv_bot_traceview.value == 10.0f)
{
DrawPath();
const Vector *pos = &m_path[m_pathIndex].pos;
UTIL_DrawBeamPoints(*pos, *pos + Vector(0, 0, 50), 1, 255, 255, 0);
UTIL_DrawBeamPoints(adjustedGoal, adjustedGoal + Vector(0, 0, 50), 1, 255, 0, 255);
UTIL_DrawBeamPoints(pev->origin, adjustedGoal + Vector(0, 0, 50), 1, 255, 0, 255);
}
// dont use adjustedGoal, as it can vary wildly from the feeler adjustment
if (!IsAttacking() && IsFriendInTheWay(&m_goalPosition))
{
if (!m_isWaitingBehindFriend)
{
m_isWaitingBehindFriend = true;
const float politeDuration = 5.0f - 3.0f * GetProfile()->GetAggression();
m_politeTimer.Start(politeDuration);
}
else if (m_politeTimer.IsElapsed())
{
// we have run out of patience
m_isWaitingBehindFriend = false;
ResetStuckMonitor();
// repath to avoid clump of friends in the way
DestroyPath();
}
}
else if (m_isWaitingBehindFriend)
{
// we're done waiting for our friend to move
m_isWaitingBehindFriend = false;
ResetStuckMonitor();
}
// Move along our path if there are no friends blocking our way,
// or we have run out of patience
if (!m_isWaitingBehindFriend || m_politeTimer.IsElapsed())
{
// Move along path
MoveTowardsPosition(&adjustedGoal);
// Stuck check
if (m_isStuck && !IsJumping())
{
Wiggle();
}
}
// if our goal is high above us, we must have fallen
bool didFall = false;
if (m_goalPosition.z - GetFeetZ() > JumpCrouchHeight)
{
const float closeRange = 75.0f;
Vector2D to(pev->origin.x - m_goalPosition.x, pev->origin.y - m_goalPosition.y);
if (to.IsLengthLessThan(closeRange))
{
// we can't reach the goal position
// check if we can reach the next node, in case this was a "jump down" situation
if (m_pathIndex < m_pathLength - 1)
{
if (m_path[m_pathIndex + 1].pos.z - GetFeetZ() > JumpCrouchHeight)
{
// the next node is too high, too - we really did fall of the path
didFall = true;
}
}
else
{
// fell trying to get to the last node in the path
didFall = true;
}
}
}
// This timeout check is needed if the bot somehow slips way off
// of its path and cannot progress, but also moves around
// enough that it never becomes "stuck"
const float giveUpDuration = 5.0f; // 4.0f
if (didFall || gpGlobals->time - m_areaEnteredTimestamp > giveUpDuration)
{
if (didFall)
{
PrintIfWatched("I fell off!\n");
}
// if we havent made any progress in a long time, give up
if (m_pathIndex < m_pathLength - 1)
{
PrintIfWatched("Giving up trying to get to area #%d\n", m_path[m_pathIndex].area->GetID());
}
else
{
PrintIfWatched("Giving up trying to get to end of path\n");
}
Run();
StandUp();
DestroyPath();
return PATH_FAILURE;
}
return PROGRESSING;
}
