void CFractureEffect::OnUpdate (SUpdateCtx &Ctx, Metric rSecondsPerTick)
// OnUpdate
//
// Update the effect
{
// See if the effect has faded out
m_iTick++;
if (m_iTick >= m_iLifeTime)
{
Destroy(removedFromSystem, CDamageSource());
return;
}
// Update particles
if (m_pParticles)
{
SParticle *pParticle = m_pParticles;
SParticle *pParticleEnd = pParticle + m_iParticleCount;
// If we have an attractor, accelerate all particles towards it
if (m_pAttractor)
{
bool bParticlesLeft = false;
// Compute the position of the attractor in the particle
// coordinate system.
CVector vDist = m_pAttractor->GetPos() - GetPos();
int xAttract = FIXED_POINT * (int)(vDist.GetX() / g_KlicksPerPixel);
int yAttract = -FIXED_POINT * (int)(vDist.GetY() / g_KlicksPerPixel);
while (pParticle < pParticleEnd)
{
int xDelta = xAttract - pParticle->x;
int yDelta = yAttract - pParticle->y;
int xDist = abs(xDelta);
int yDist = abs(yDelta);
// If within threshold, then particles do not move
if (xDist < (8 * FIXED_POINT) && yDist < (8 * FIXED_POINT))
;
// Otherwise, move towards attractor
else
{
int iDist = Max(xDist, yDist);
int iSpeed = 256 * 256 * FIXED_POINT / iDist;
iSpeed = Min(iSpeed, 4 * FIXED_POINT);
int iFade = (m_iTick > 100 ? 0 : (100 - m_iTick));
int xV = (iSpeed * xDelta / iDist) + (iFade * pParticle->xV / 100);
int yV = (iSpeed * yDelta / iDist) + (iFade * pParticle->yV / 100);
pParticle->x += xV;
pParticle->y += yV;
bParticlesLeft = true;
}
pParticle++;
}
// If no particles left, destroy the effect
if (!bParticlesLeft)
{
Destroy(removedFromSystem, CDamageSource());
return;
}
}
// Otherwise, follow normal trajectory
else
{
while (pParticle < pParticleEnd)
{
pParticle->x += pParticle->xV;
pParticle->y += pParticle->yV;
pParticle++;
}
}
}
else
{
Destroy(removedFromSystem, CDamageSource());
return;
}
// If we're moving, slow down
SetVel(CVector(GetVel().GetX() * g_SpaceDragFactor, GetVel().GetY() * g_SpaceDragFactor));
}
void CParticleEffect::OnUpdate (Metric rSecondsPerTick)
// OnUpdate
//
// Update the effect
{
int iTick = GetSystem()->GetTick() + GetDestiny();
// Do not bother updating everything if we are far from the POV
bool bFarAway = false;
if (g_pUniverse->GetPOV()
&& g_pUniverse->GetCurrentSystem() == GetSystem())
{
Metric rPOVDist2 = (GetPos() - g_pUniverse->GetPOV()->GetPos()).Length2();
Metric rMaxUpdateDist2 = LIGHT_SECOND * LIGHT_SECOND * 3600;
bFarAway = (rPOVDist2 > rMaxUpdateDist2);
}
// Update the particles
SParticleArray *pGroup = m_pFirstGroup;
while (pGroup)
{
SParticleType *pType = pGroup->pType;
// Max distance for a particle in this group
Metric rMaxDist2 = pType->rRadius * pType->rRadius;
Metric rMinDist2 = pType->rHoleRadius * pType->rHoleRadius;
// If the particle field causes damage then we need to
// compute its average density
int iDensity = 0;
if (pType->m_fDamage)
{
Metric rRadius2 = pType->rRadius * pType->rRadius;
Metric rArea = rRadius2 / (LIGHT_SECOND * LIGHT_SECOND);
iDensity = (int)(4 * pGroup->iCount / rArea);
}
// Get an array of objects in the particle field that
// may influence the particles
CSpaceObject *Objects[ctMaxObjsInField];
int iObjCount = 0;
if (!bFarAway && (pType->m_fWake || pType->m_fDamage))
{
Metric rMaxInfluenceDist2 = rMaxDist2;
for (int i = 0; i < GetSystem()->GetObjectCount(); i++)
{
CSpaceObject *pObj = GetSystem()->GetObject(i);
if (pObj
&& pObj->GetCategory() == catShip
&& pObj != this)
{
CVector vDist = GetPos() - pObj->GetPos();
Metric rDist2 = vDist.Length2();
if (rDist2 < rMaxInfluenceDist2
&& (pObj->GetVel().Length2() > g_KlicksPerPixel)
&& iObjCount < ctMaxObjsInField)
{
Objects[iObjCount++] = pObj;
// See if the object should take damage
if (pType->m_fDamage)
{
CVector vDeltaV = pObj->GetVel() - GetVel();
int iSpeed = (int)(vDeltaV.Length() / g_KlicksPerPixel);
if (iSpeed == 0)
iSpeed = 1;
if (mathRandom(1, 1000) < (iDensity * iSpeed))
{
pObj->Damage(this,
pObj->GetPos(),
VectorToPolar(vDeltaV),
pType->Damage);
}
}
}
}
}
}
// If we're computing drag then we need to compute the new velocity
// of the whole particle system
CVector vNewVel;
if (pType->m_fDrag)
vNewVel = GetVel() * g_SpaceDragFactor;
// Iterate over all particles
SParticle *pParticle = pGroup->pParticles;
SParticle *pEnd = pParticle + pGroup->iCount;
while (pParticle < pEnd)
{
if (pParticle->IsValid())
{
// Lifespan. If we're far away and we're regenerating,
// then don't bother to compute lifespan.
if (pType->m_fLifespan
&& !(bFarAway && (pType->m_fRegenerate && pType->iRegenerationTimer)))
{
if (--pParticle->iLifeLeft == 0)
{
// Do we regenerate?
if (pType->m_fRegenerate && pType->iRegenerationTimer)
{
pParticle->iLifeLeft = pType->iLifespan;
pParticle->vPos = NullVector;
// Speed
Metric rSpeed = mathRandom(1, 100) * (pType->rAveSpeed / 100.0);
if (pType->iDirection == -1)
pParticle->vVel = PolarToVector(mathRandom(0, 359), rSpeed);
else
{
int iAngle = (pType->iDirection + 360 + mathRandom(0, 2 * pType->iDirRange) - pType->iDirRange) % 360;
pParticle->vVel = PolarToVector(iAngle, rSpeed);
}
}
// Otherwise we die
else
{
pParticle->iLifeLeft = -1;
pGroup->iAlive--;
pParticle++;
continue;
}
}
}
// Update the position
if (!bFarAway)
{
pParticle->vPos = pParticle->vPos + pParticle->vVel;
// Change the velocity to keep the particles within
// the radius
if (pType->m_fMaxRadius)
{
Metric rDist2 = pParticle->vPos.Length2();
if (pType->m_fMaxRadius && rDist2 > rMaxDist2)
{
CVector vChange = pParticle->vPos + g_KlicksPerPixel * pParticle->vPos.Perpendicular().Normal();
pParticle->vVel = pParticle->vVel - (0.00005 * vChange);
}
else if (rDist2 < rMinDist2)
{
CVector vNormal = pParticle->vPos.Normal();
CVector vChange = g_KlicksPerPixel * (400 * vNormal - 50 * vNormal.Perpendicular());
pParticle->vVel = pParticle->vVel + (0.00005 * vChange);
}
else
pParticle->vVel = pParticle->vVel * pType->rDampening;
}
if (pType->m_fDrag)
{
// Compute the new absolute velocity (after drag)
CVector vAbsolute = pType->rDampening * (pParticle->vVel + GetVel());
// The particle velocity is the absolute vel minus the
// system velocity.
pParticle->vVel = vAbsolute - vNewVel;
}
// Change the velocity based on influences from other objects
if (pType->m_fWake && (iTick % 4) == 0)
{
for (int i = 0; i < iObjCount; i++)
{
Metric rDist2 = (Objects[i]->GetPos() - (pParticle->vPos + GetPos())).Length2();
if (rDist2 < g_KlicksPerPixel * g_KlicksPerPixel * 1000)
{
if (Objects[i]->GetVel().Dot(pParticle->vVel) < Objects[i]->GetVel().Length2())
pParticle->vVel = pParticle->vVel + 0.2 * Objects[i]->GetVel();
}
}
}
}
}
pParticle++;
}
// Regeneration timer
if (pType->m_fRegenerate && pType->iRegenerationTimer)
pType->iRegenerationTimer--;
// If there are no more particles left alive in this group then kill
// the group
if (pGroup->iAlive == 0)
{
SParticleArray *pNext = pGroup->pNext;
SParticleArray *pPrev = NULL;
// Find the previous group
SParticleArray *pFind = m_pFirstGroup;
while (pFind != pGroup)
{
if (pPrev)
pPrev = pPrev->pNext;
else
pPrev = m_pFirstGroup;
pFind = pFind->pNext;
}
// Fix up the linked list
if (pPrev)
pPrev->pNext = pNext;
else
m_pFirstGroup = pNext;
// Delete the group
delete pGroup;
pGroup = pNext;
}
// Otherwise, next group
else
pGroup = pGroup->pNext;
}
// If we have no more groups then we destroy ourselves
if (m_pFirstGroup == NULL)
{
Destroy(removedFromSystem, NULL);
return;
}
// If we're moving, slow down
SetVel(CVector(GetVel().GetX() * g_SpaceDragFactor, GetVel().GetY() * g_SpaceDragFactor));
}
void CMissile::OnUpdate (SUpdateCtx &Ctx, Metric rSecondsPerTick)
// OnUpdate
//
// Update the beam
{
// If we're already destroyed, then just update the timer until the
// vapor trail fades out
if (m_fDestroyed)
{
// Update the painter
if (m_pPainter)
{
m_pPainter->OnUpdate();
// LATER: We shouldn't have to update bounds here because
// it is set in OnMove.
SetBounds(m_pPainter);
}
// Done?
if (--m_iLifeLeft <= 0)
{
Destroy(removedFromSystem, CDamageSource());
return;
}
}
// Otherwise, update
else
{
int i;
CSystem *pSystem = GetSystem();
int iTick = m_iTick + GetDestiny();
bool bDestroy = false;
// Accelerate, if necessary
if (m_pDesc->m_iAccelerationFactor > 0
&& (iTick % 10 ) == 0)
{
if (m_pDesc->m_iAccelerationFactor < 100
|| GetVel().Length() < m_pDesc->m_rMaxMissileSpeed)
SetVel(GetVel() * (Metric)(m_pDesc->m_iAccelerationFactor / 100.0));
}
// If we can choose new targets, see if we need one now
if (m_pDesc->CanAutoTarget() && m_pTarget == NULL)
m_pTarget = GetNearestEnemy(MAX_TARGET_RANGE, false);
// If this is a tracking missile, change direction to face the target
if (m_pDesc->IsTrackingTime(iTick)
&& m_pTarget)
{
// Get the position and velocity of the target
CVector vTarget = m_pTarget->GetPos() - GetPos();
CVector vTargetVel = m_pTarget->GetVel() - GetVel();
// Figure out which direction to move in
int iFireAngle;
Metric rCurrentSpeed = GetVel().Length();
Metric rTimeToIntercept = CalcInterceptTime(vTarget, vTargetVel, rCurrentSpeed);
if (rTimeToIntercept > 0.0)
{
CVector vInterceptPoint = vTarget + vTargetVel * rTimeToIntercept;
iFireAngle = VectorToPolar(vInterceptPoint, NULL);
}
else
iFireAngle = VectorToPolar(vTarget);
// Turn to desired direction.
if (!AreAnglesAligned(iFireAngle, m_iRotation, 1))
{
int iTurn = (iFireAngle + 360 - m_iRotation) % 360;
if (iTurn >= 180)
{
int iTurnAngle = Min((360 - iTurn), m_pDesc->GetManeuverRate());
m_iRotation = (m_iRotation + 360 - iTurnAngle) % 360;
}
else
{
int iTurnAngle = Min(iTurn, m_pDesc->GetManeuverRate());
m_iRotation = (m_iRotation + iTurnAngle) % 360;
}
}
SetVel(PolarToVector(m_iRotation, rCurrentSpeed));
}
// Update exhaust
if (m_pExhaust)
{
if (iTick % m_pDesc->m_iExhaustRate)
{
if (m_pExhaust->GetCount() == m_pExhaust->GetMaxCount())
m_pExhaust->Dequeue();
SExhaustParticle &New = m_pExhaust->GetAt(m_pExhaust->Queue());
New.vPos = GetPos();
New.vVel = GetVel();
}
for (int i = 0; i < m_pExhaust->GetCount(); i++)
{
SExhaustParticle &Particle = m_pExhaust->GetAt(i);
Particle.vVel = m_pDesc->m_rExhaustDrag * Particle.vVel;
Particle.vPos = Particle.vPos + Particle.vVel * g_SecondsPerUpdate;
}
}
// Update the painter
if (m_pPainter)
{
m_pPainter->OnUpdate();
// LATER: We shouldn't have to update bounds here because
// it is set in OnMove.
SetBounds(m_pPainter);
}
// If we have a vapor trail and need to save rotation, do it
if (m_pDesc->GetVaporTrailLength()
&& m_pDesc->IsTracking())
{
// Compute the current rotation
int iDirection = (m_iRotation + 180) % 360;
// Add the current rotation to the list of saved rotations
if (m_pSavedRotations == NULL)
{
m_pSavedRotations = new int [m_pDesc->GetVaporTrailLength()];
m_iSavedRotationsCount = 0;
}
int iStart = Min(m_iSavedRotationsCount, m_pDesc->GetVaporTrailLength() - 1);
for (i = iStart; i > 0; i--)
m_pSavedRotations[i] = m_pSavedRotations[i - 1];
m_pSavedRotations[0] = iDirection;
if (m_iSavedRotationsCount < m_pDesc->GetVaporTrailLength())
m_iSavedRotationsCount++;
}
// See if the missile hit anything
if (m_fDetonate && m_pDesc->ProximityBlast())
{
CreateFragments(GetPos());
bDestroy = true;
}
else if (m_pHit)
{
// If we have fragments, then explode now
if (m_iHitDir == -1
&& m_pDesc->ProximityBlast()
&& m_iTick >= m_pDesc->GetProximityFailsafe())
{
CreateFragments(m_vHitPos);
bDestroy = true;
}
// Otherwise, if this was a direct hit, then we do damage
else if (m_iHitDir != -1)
{
SDamageCtx DamageCtx;
DamageCtx.pObj = m_pHit;
DamageCtx.pDesc = m_pDesc;
DamageCtx.Damage = m_pDesc->m_Damage;
DamageCtx.Damage.AddBonus(m_iBonus);
DamageCtx.Damage.SetCause(m_iCause);
if (IsAutomatedWeapon())
DamageCtx.Damage.SetAutomatedWeapon();
DamageCtx.iDirection = (m_iHitDir + 360 + mathRandom(0, 30) - 15) % 360;
DamageCtx.vHitPos = m_vHitPos;
DamageCtx.pCause = this;
DamageCtx.Attacker = m_Source;
EDamageResults result = m_pHit->Damage(DamageCtx);
// If we hit another missile (or some small object) there is a chance
// that we continue
if (result == damagePassthrough || result == damagePassthroughDestroyed)
{
m_iHitPoints = m_iHitPoints / 2;
bDestroy = (m_iHitPoints == 0);
}
// Set the missile to destroy itself after a hit, if we did not
// pass through
else if (!m_fPassthrough)
bDestroy = true;
}
}
// See if the missile has faded out
if (bDestroy || --m_iLifeLeft <= 0)
{
// If this is a fragmentation weapon, then we explode at the end of life
if (!bDestroy && m_pDesc->ProximityBlast())
CreateFragments(GetPos());
// If we've got a vapor trail effect, then keep the missile object alive
// but mark it destroyed
int iFadeLife;
if (m_pDesc->GetVaporTrailLength())
{
m_fDestroyed = true;
m_iLifeLeft = m_pDesc->GetVaporTrailLength();
}
// If we've got an effect that needs time to fade out, then keep
// the missile object alive
else if (m_pPainter && (iFadeLife = m_pPainter->GetFadeLifetime()))
{
m_pPainter->OnBeginFade();
m_fDestroyed = true;
m_iLifeLeft = iFadeLife;
}
// Otherwise, destroy the missile
else
{
Destroy(removedFromSystem, CDamageSource());
return;
}
}
}
m_iTick++;
}
int _Spit::Callback(unsigned int msg, unsigned int wParam, int lParam)
{
switch(msg)
{
case ENTITYMSG_UPDATE:
//update velocity
SetVel(GetDir()*m_spd.MoveUpdate(g_timeElapse));
//update sound position
if(m_tSnd)
{
BASS_3DVECTOR pos, orient, vel;
memcpy(&pos, (float*)GetLoc(), sizeof(pos)); pos.z *= -1;
memcpy(&orient, (float*)GetDir(), sizeof(orient)); orient.z *= -1;
memcpy(&vel, (float*)GetVel(), sizeof(vel)); vel.z *= -1;
BASS_ChannelSet3DPosition(m_tSnd, &pos, &orient, &vel);
}
break;
case ENTITYMSG_ENTITYCOLLIDE://, (WPARAM)pEntity
{
EntityCommon *pEntity = (EntityCommon *)wParam;
EntityCommon *pOwner = (EntityCommon *)IDPageQuery(GetOwner());
//check to see if the owner is not the same type as entity
if(pOwner)
{
if(pOwner->GetEntityType() != pEntity->GetEntityType())
{
//check to see if the entity is a creature
if((pEntity->GetEntityType() == ENTITY_TYPE_TATA
|| pEntity->GetEntityType() == ENTITY_TYPE_ENEMY)
&& !pEntity->CheckFlag(CRE_FLAG_SPITIMMUNE))
{
//hit this fella
Creature *pCre = (Creature *)pEntity;
if(pCre->Hit())
{
int sndInd = -1;
pOwner->Callback(ENTITYMSG_REQUESTSOUND, SND_REQ_PROJ_HIT_CRE, (LPARAM)&sndInd);
pCre->CREPlaySound(sndInd);
}
SetFlag(ENTITY_FLAG_POLLDEATH, true);
}
}
}
if(!m_bBounce || m_bounceCur == m_bounceMax)
SetFlag(ENTITY_FLAG_POLLDEATH, true);
else
{
//bounce off
gfxTrace *pTrace = (gfxTrace*)lParam;
D3DXVECTOR3 norm(pTrace->norm), refl;
float nd = D3DXVec3Dot(&GetDir(), &norm);
refl = GetDir() - (2*nd*norm);
SetDir(refl);
m_bounceCur++;
}
}
break;
case ENTITYMSG_WORLDCOLLIDE:
{
if(!m_bBounce || m_bounceCur == m_bounceMax)
SetFlag(ENTITY_FLAG_POLLDEATH, true);
else
{
//bounce off
gfxTrace *pTrace = (gfxTrace*)lParam;
D3DXVECTOR3 norm(pTrace->norm), refl;
float nd = D3DXVec3Dot(&GetDir(), &norm);
refl = GetDir() - (2*nd*norm);
SetDir(refl);
m_bounceCur++;
}
}
break;
case ENTITYMSG_DEATH:
//cool FX explosion
break;
case ENTITYMSG_ALLOWGRAVITY:
//simply don't allow gravity
return 0;
}
return RETCODE_SUCCESS;
}
