CFVec2 CSteeringAgent::GetRepulsionBearingEffect() const
{
CFVec2 vCumulativeRepulsionEffect = fv2EMPTY;
const vector<CCircle>& krRepulsionZones = CBlackboard::GetInstance().GetRepulsionZones();
for (unsigned int uiIndex = 0; uiIndex < krRepulsionZones.size(); uiIndex++)
{
CFVec2 vRepulsionEffect = m_krCat.GetPosition() - krRepulsionZones.at(uiIndex).Centre();
FLOAT32 fDistanceBetweenCenters = vRepulsionEffect.Magnitude();
FLOAT32 fDistanceBetweenBorders = fDistanceBetweenCenters - m_krCat.GetRadius() -
krRepulsionZones.at(uiIndex).Radius();
if (m_krCat.GetHeadingVector().DotProduct(vRepulsionEffect) < 0.0f &&
fDistanceBetweenBorders < m_fRepulsionBufferStatic)
{
FLOAT32 fDistanceIntoRepulsionBuffer = (m_fRepulsionBufferStatic - fDistanceBetweenBorders) /
m_fRepulsionBufferStatic;
vRepulsionEffect.Normalise();
vRepulsionEffect *= fDistanceIntoRepulsionBuffer;
vCumulativeRepulsionEffect += vRepulsionEffect;
}
}
const vector<const CCat*>& krCats = CBlackboard::GetInstance().GetCats();
for (unsigned int uiIndex = 0; uiIndex < krCats.size(); uiIndex++)
{
CFVec2 vRepulsionEffect = m_krCat.GetPosition() - krCats.at(uiIndex)->GetPosition();
FLOAT32 fDistanceBetweenCenters = vRepulsionEffect.Magnitude();
// We don't want the cat to repel itself...
if (fDistanceBetweenCenters == 0.0f)
{
continue;
}
FLOAT32 fDistanceBetweenBorders = fDistanceBetweenCenters - m_krCat.GetRadius() * 2.0f;
if (m_krCat.GetHeadingVector().DotProduct(vRepulsionEffect) < 0.0f &&
fDistanceBetweenBorders < m_fRepulsionBufferDynamic)
{
FLOAT32 fDistanceIntoRepulsionBuffer = (m_fRepulsionBufferDynamic - fDistanceBetweenBorders) /
m_fRepulsionBufferDynamic;
vRepulsionEffect.Normalise();
vRepulsionEffect *= fDistanceIntoRepulsionBuffer;
vCumulativeRepulsionEffect += vRepulsionEffect;
}
}
if (vCumulativeRepulsionEffect.Magnitude() > 1.0f)
{
vCumulativeRepulsionEffect.Normalise();
}
return vCumulativeRepulsionEffect;
}
void
CMole::ComputeSeekForce(CFVec2& _vrSeekForce, int _iTargetNodeId)
{
const Path::TNode& ktrTargetNode = s_pSharedPath->GetNode(_iTargetNodeId);
CFVec2 vSeekForce;
vSeekForce = ktrTargetNode.vPosition;
vSeekForce -= m_vPosition;
vSeekForce.Normalise();
_vrSeekForce = vSeekForce;
}
CFVec2 CSteeringAgent::GetAbsoluteWhiskerStart(const CFVec2& _krvRelativeWhisker) const
{
CFVec2 vAbsoluteWhiskerStart = GetAdjustedWhisker(_krvRelativeWhisker);
if (vAbsoluteWhiskerStart.Magnitude() != 0.0f)
{
vAbsoluteWhiskerStart.Normalise();
vAbsoluteWhiskerStart *= m_krCat.GetRadius();
}
vAbsoluteWhiskerStart += m_krCat.GetPosition();
return vAbsoluteWhiskerStart;
}
CFVec2 CSteeringAgent::GetWhiskerBearingEffect() const
{
CBlackboard& rBlackboard = CBlackboard::GetInstance();
bool bRotationApplied = false;
FLOAT32 fTotalRotation = 0.0f;
FLOAT32 fRotation = Math::PI / 2.0f; // 90 degrees
for (unsigned int uiIndex = 0 ; uiIndex < SIDE_WHISKER_COUNT; uiIndex++)
{
FLOAT32 fWhiskerTime =
rBlackboard.GetClosestWallIntersectionTime(GetAbsoluteWhiskerStart(m_vWhiskersLeft[uiIndex]),
GetAdjustedWhisker(m_vWhiskersLeft[uiIndex]));
if (fWhiskerTime != -1.0f)
{
fTotalRotation += fRotation;
bRotationApplied = true;
}
fWhiskerTime =
rBlackboard.GetClosestWallIntersectionTime(GetAbsoluteWhiskerStart(m_vWhiskersRight[uiIndex]),
GetAdjustedWhisker(m_vWhiskersRight[uiIndex]));
if (fWhiskerTime != -1.0f)
{
fTotalRotation -= fRotation;
bRotationApplied = true;
}
fRotation /= 5.0f; // TODO MAGIC
}
if (bRotationApplied)
{
// If the rotation was cancelled out (accounting for rounding errors).
if (abs(fTotalRotation) < 0.0001f)
{
// The whiskers are intersecting on both sides so chances are we're heading straight for something and we
// need to turn. Clockwise 90 degrees sounds good...
fTotalRotation += Math::PI / 2.0f;
}
CFVec2 vWhiskerBearingEffect = m_krCat.GetHeadingVector();
vWhiskerBearingEffect.Normalise();
vWhiskerBearingEffect.RotateZ(fTotalRotation);
return vWhiskerBearingEffect;
}
return fv2EMPTY;
}
void CPathFindingAgent::AdvanceDestinationOnPath(float _fDistance)
{
if (m_iPreviousWaypointIndex == -1)
{
m_iPreviousWaypointIndex = 0;
m_iNextWaypointIndex = 1;
}
CFVec2 vAdvancement =
m_path.at(m_iNextWaypointIndex)->GetPosition() -
m_path.at(m_iPreviousWaypointIndex)->GetPosition();
vAdvancement.Normalise();
vAdvancement *= _fDistance;
CFVec2 vDestinationCopy = m_vDestination;
vDestinationCopy += vAdvancement;
float fDistancePastNextWaypoint =
(vDestinationCopy - m_path.at(m_iPreviousWaypointIndex)->GetPosition()).Magnitude() -
(m_path.at(m_iNextWaypointIndex)->GetPosition() - m_path.at(m_iPreviousWaypointIndex)->GetPosition()).Magnitude();
if (fDistancePastNextWaypoint > 0.0f)
{
m_vDestination = m_path.at(m_iNextWaypointIndex)->GetPosition();
if (m_path.size() > (unsigned) m_iNextWaypointIndex + 1)
{
m_iPreviousWaypointIndex++;
m_iNextWaypointIndex++;
AdvanceDestinationOnPath(fDistancePastNextWaypoint);
}
}
else
{
m_vDestination += vAdvancement;
}
}
void CSquirrel::Update( FLOAT32 fTimeDelta )
{
if ( 0 == m_uNumLives )
{
return;
}
const static CFVec2 s_vMoveOffsets[] =
{
SFVec2( -1.0f, 0.0f ), //"Left",
SFVec2( 1.0f, 0.0f ), //"Right",
SFVec2( 0.0f, -1.0f ), //"Up",
SFVec2( 0.0f, 1.0f ), //"Down"
};
_COMPILE_ASSERT( _ARRAY_SIZE( s_vMoveOffsets ) == EMove_COUNT );
CFVec2 vMove = SFVec2( 0.0f, 0.0f );
for ( UINT32 i=0; i< EMove_COUNT; i++ )
{
if ( m_Movements[i].m_bValue )
{
vMove += s_vMoveOffsets[i];
}
}
// great, now we have the movement direction.
if ( vMove.SquareMagnitude() != 0.0f )
{
m_fDistTimeMoving += fTimeDelta;
vMove.Normalise();
FLOAT32 fStep = 1.0f;
CFVec2 vTestedMove = vMove * fTimeDelta * m_fSpeed * fStep;
// now check the target position - is it embedded in any walls?
CCircle TargetBounds;
while ( fStep > 0.0f )
{
TargetBounds.Initialise( m_vPosition + vTestedMove, m_fRadius );
if ( false == CMMMContext::GetInstance().CircleIntersectsGeometry( TargetBounds ) )
{
break; // found a valid, allowable movement.
}
fStep -= 0.2f;
vTestedMove = vMove * fTimeDelta * m_fSpeed * fStep;
}
// now update to the new position
m_vPosition += vTestedMove;
// finally what happens at the new position
// is an acorn collected?
if ( m_uNumAcorns != m_uMaxAcorns )
{
CAcorn* pLevelAcorns;
UINT32 uNumLevelAcorns;
CMMMContext::GetInstance().GetAcorns( pLevelAcorns, uNumLevelAcorns );
for ( UINT32 i=0; i<uNumLevelAcorns; i++ )
{
if ( pLevelAcorns[i].GetState() == CAcorn::ES_Available )
{
if ( pLevelAcorns[i].Intersects( TargetBounds ) )
{
pLevelAcorns[i].SetState( CAcorn::ES_Carried );
m_ppAcorns[m_uNumAcorns++] = pLevelAcorns+i;
if ( m_uNumAcorns == m_uMaxAcorns )
{
break; // cannont collect any more!
}
}
}
}
}
// is a tunnel reached?
if ( m_uNumAcorns > 0 )
{
CTunnel* pTunnels;
UINT32 uNumTunnels;
CMMMContext::GetInstance().GetTunnels( pTunnels, uNumTunnels );
for ( UINT32 i=0; i<uNumTunnels; i++ )
{
if ( pTunnels[i].Intersects( TargetBounds ) )
{
// reached the tunnel.
for ( UINT32 i=0; i<m_uNumAcorns; i++ )
{
m_ppAcorns[i]->SetState( CAcorn::ES_Collected );
m_uScore++;
}
m_uNumAcorns = 0;
}
}
}
}
m_fTimeToDisturbance -= fTimeDelta;
if ( m_fTimeToDisturbance <= 0.0f )
{
// schedule the next disturbance.
m_fTimeToDisturbance = FLOAT32(rand())/FLOAT32(RAND_MAX);
m_fTimeToDisturbance *= m_fMaxDistSep-m_fMinDistSep;
m_fTimeToDisturbance += m_fMinDistSep;
// create this disturbance:
FLOAT32 fRad = m_fLastDistDelay=0.0f?0.0f:m_fDistTimeMoving/m_fLastDistDelay;
// DbgPrint( "Creating Disturbance strength %0.2f, next delay %0.2f\n", fRad,m_fTimeToDisturbance );
fRad *= m_fMaxDistRad-m_fMinDistRad;
fRad += m_fMinDistRad;
if ( fRad >= 0.0f )
{
CCircle Dist;
Dist.Initialise( m_vPosition, fRad );
CMMMContext::GetInstance().CreateDisturbance( Dist );
}
m_fDistTimeMoving = 0.0f;
m_fLastDistDelay = m_fTimeToDisturbance;
}
}
