void CPhysicsSpring::GetSpringObjectConnections( string_t nameStart, string_t nameEnd, IPhysicsObject **pStart, IPhysicsObject **pEnd )
{
IPhysicsObject *pStartObject = FindPhysicsObject( STRING(nameStart) );
IPhysicsObject *pEndObject = FindPhysicsObject( STRING(nameEnd) );
// Assume the world for missing objects
if ( !pStartObject )
{
pStartObject = g_PhysWorldObject;
}
else if ( !pEndObject )
{
// try to sort so that the world is always the start object
pEndObject = pStartObject;
pStartObject = g_PhysWorldObject;
}
else
{
CBaseEntity *pEntity0 = (CBaseEntity *) (pStartObject->GetGameData());
g_pNotify->AddEntity( this, pEntity0 );
CBaseEntity *pEntity1 = (CBaseEntity *) pEndObject->GetGameData();
g_pNotify->AddEntity( this, pEntity1 );
}
*pStart = pStartObject;
*pEnd = pEndObject;
}
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
void CPhysics_Airboat::do_raycasts_gameside( int nRaycastCount, IVP_Ray_Solver_Template *pRays,
IVP_Raycast_Airboat_Impact *pImpacts )
{
Assert( nRaycastCount >= 0 );
Assert( nRaycastCount <= IVP_RAYCAST_AIRBOAT_MAX_WHEELS );
Ray_t gameRays[IVP_RAYCAST_AIRBOAT_MAX_WHEELS];
pre_raycasts_gameside( nRaycastCount, pRays, gameRays, pImpacts );
// Do the raycasts and set impact data.
trace_t trace;
for ( int iRaycast = 0; iRaycast < nRaycastCount; ++iRaycast )
{
// Trace.
if ( pImpacts[iRaycast].bInWater )
{
IPhysicsObject *pPhysAirboat = static_cast<IPhysicsObject*>( m_pAirboatBody->client_data );
m_pGameTrace->VehicleTraceRay( gameRays[iRaycast], pPhysAirboat->GetGameData(), &trace );
}
else
{
IPhysicsObject *pPhysAirboat = static_cast<IPhysicsObject*>( m_pAirboatBody->client_data );
m_pGameTrace->VehicleTraceRayWithWater( gameRays[iRaycast], pPhysAirboat->GetGameData(), &trace );
}
// Set impact data.
if ( trace.fraction == 1.0f )
{
pImpacts[iRaycast].bImpact = IVP_FALSE;
}
else
{
pImpacts[iRaycast].bImpact = IVP_TRUE;
// Set water surface flag.
pImpacts[iRaycast].bImpactWater = IVP_FALSE;
if ( trace.contents & MASK_WATER )
{
pImpacts[iRaycast].bImpactWater = IVP_TRUE;
}
// Save impact surface data.
ConvertPositionToIVP( trace.endpos, pImpacts[iRaycast].vecImpactPointWS );
ConvertDirectionToIVP( trace.plane.normal, pImpacts[iRaycast].vecImpactNormalWS );
// Save surface properties.
surfacedata_t *pSurfaceData = physprops->GetSurfaceData( trace.surface.surfaceProps );
pImpacts[iRaycast].flDampening = pSurfaceData->dampening;
pImpacts[iRaycast].flFriction = pSurfaceData->friction;
}
}
}
static CBaseEntity *FindPhysicsBlocker( IPhysicsObject *pPhysics )
{
IPhysicsFrictionSnapshot *pSnapshot = pPhysics->CreateFrictionSnapshot();
CBaseEntity *pBlocker = NULL;
float maxVel = 10.0f;
while ( pSnapshot->IsValid() )
{
IPhysicsObject *pOther = pSnapshot->GetObject(1);
if ( pOther->IsMoveable() )
{
CBaseEntity *pOtherEntity = static_cast<CBaseEntity *>(pOther->GetGameData());
// dot with this if you have a direction
//Vector normal;
//pSnapshot->GetSurfaceNormal(normal);
float force = pSnapshot->GetNormalForce();
float vel = force * pOther->GetInvMass();
if ( vel > maxVel )
{
pBlocker = pOtherEntity;
maxVel = vel;
}
}
pSnapshot->NextFrictionData();
}
pPhysics->DestroyFrictionSnapshot( pSnapshot );
return pBlocker;
}
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
bool CTriggerPortal::IsTouchingPortal( CBaseEntity *pEntity )
{
// First, check the touchlinks. This will find non-vphysics entities touching us
touchlink_t *root = ( touchlink_t * )GetDataObject( TOUCHLINK );
if ( root )
{
for ( touchlink_t *link = root->nextLink; link != root; link = link->nextLink )
{
CBaseEntity *pTouch = link->entityTouched;
if ( pTouch == pEntity )
return true;
}
}
// Then check the friction snapshot. This will find vphysics objects touching us.
IPhysicsObject *pPhysics = VPhysicsGetObject();
if ( !pPhysics )
return false;
IPhysicsFrictionSnapshot *pSnapshot = pPhysics->CreateFrictionSnapshot();
bool bFound = false;
while ( pSnapshot->IsValid() )
{
IPhysicsObject *pOther = pSnapshot->GetObject( 1 );
if ( ((CBaseEntity *)pOther->GetGameData()) == pEntity )
{
bFound = true;
break;
}
pSnapshot->NextFrictionData();
}
pPhysics->DestroyFrictionSnapshot( pSnapshot );
return bFound;
}
void CCollisionEvent::ObjectSound( int index, vcollisionevent_t *pEvent )
{
IPhysicsObject *pObject = pEvent->pObjects[index];
if ( !pObject || pObject->IsStatic() )
return;
float speed = pEvent->collisionSpeed * pEvent->collisionSpeed;
int surfaceProps = pEvent->surfaceProps[index];
void *pGameData = pObject->GetGameData();
if ( pGameData )
{
float volume = speed * (1.0f/(320.0f*320.0f)); // max volume at 320 in/s
if ( volume > 1.0f )
volume = 1.0f;
if ( surfaceProps >= 0 )
{
g_PhysicsSystem.AddImpactSound( pGameData, pObject, surfaceProps, pEvent->surfaceProps[!index], volume, speed );
}
}
}
bool PhysHasContactWithOtherInDirection( IPhysicsObject *pPhysics, const Vector &dir )
{
bool hit = false;
void *pGameData = pPhysics->GetGameData();
IPhysicsFrictionSnapshot *pSnapshot = pPhysics->CreateFrictionSnapshot();
while ( pSnapshot->IsValid() )
{
IPhysicsObject *pOther = pSnapshot->GetObject( 1 );
if ( pOther->GetGameData() != pGameData )
{
Vector normal;
pSnapshot->GetSurfaceNormal( normal );
if ( DotProduct(normal,dir) > 0 )
{
hit = true;
break;
}
}
pSnapshot->NextFrictionData();
}
pPhysics->DestroyFrictionSnapshot( pSnapshot );
return hit;
}
float CalculateObjectStress( IPhysicsObject *pObject, CBaseEntity *pInputOwnerEntity, vphysics_objectstress_t *pOutput )
{
CUtlVector< CBaseEntity * > pObjectList;
CUtlVector< Vector > objectForce;
bool hasLargeObject = false;
// add a slot for static objects
pObjectList.AddToTail( NULL );
objectForce.AddToTail( vec3_origin );
// add a slot for friendly objects
pObjectList.AddToTail( NULL );
objectForce.AddToTail( vec3_origin );
CBaseCombatCharacter *pBCC = pInputOwnerEntity->MyCombatCharacterPointer();
IPhysicsFrictionSnapshot *pSnapshot = pObject->CreateFrictionSnapshot();
float objMass = pObject->GetMass();
while ( pSnapshot->IsValid() )
{
float force = pSnapshot->GetNormalForce();
if ( force > 0.0f )
{
IPhysicsObject *pOther = pSnapshot->GetObject(1);
CBaseEntity *pOtherEntity = static_cast<CBaseEntity *>(pOther->GetGameData());
if ( !pOtherEntity )
{
// object was just deleted, but we still have a contact point this frame...
// just assume it came from the world.
pOtherEntity = GetWorldEntity();
}
CBaseEntity *pOtherOwner = pOtherEntity;
if ( pOtherEntity->GetOwnerEntity() )
{
pOtherOwner = pOtherEntity->GetOwnerEntity();
}
int outIndex = 0;
if ( !pOther->IsMoveable() )
{
outIndex = 0;
}
// NavIgnored objects are often being pushed by a friendly
else if ( pBCC && (pBCC->IRelationType( pOtherOwner ) == D_LI || pOtherEntity->IsNavIgnored()) )
{
outIndex = 1;
}
// player held objects do no stress
else if ( pOther->GetGameFlags() & FVPHYSICS_PLAYER_HELD )
{
outIndex = 1;
}
else
{
if ( pOther->GetMass() >= VPHYSICS_LARGE_OBJECT_MASS )
{
if ( pInputOwnerEntity->GetGroundEntity() != pOtherEntity)
{
hasLargeObject = true;
}
}
// moveable, non-friendly
// aggregate contacts over each object to avoid greater stress in multiple contact cases
// NOTE: Contacts should be in order, so this shouldn't ever search, but just in case
outIndex = pObjectList.Count();
for ( int i = pObjectList.Count()-1; i >= 2; --i )
{
if ( pObjectList[i] == pOtherOwner )
{
outIndex = i;
break;
}
}
if ( outIndex == pObjectList.Count() )
{
pObjectList.AddToTail( pOtherOwner );
objectForce.AddToTail( vec3_origin );
}
}
if ( outIndex != 0 && pInputOwnerEntity->GetMoveType() != MOVETYPE_VPHYSICS && !IsPhysicallyControlled(pOtherEntity, pOther) )
{
// UNDONE: Test this! This is to remove any shadow/shadow stress. The game should handle this with blocked/damage
force = 0.0f;
}
Vector normal;
pSnapshot->GetSurfaceNormal( normal );
objectForce[outIndex] += normal * force;
}
pSnapshot->NextFrictionData();
}
pObject->DestroyFrictionSnapshot( pSnapshot );
pSnapshot = NULL;
// clear out all friendly force
objectForce[1].Init();
float sum = 0;
Vector negativeForce = vec3_origin;
Vector positiveForce = vec3_origin;
Assert( pObjectList.Count() == objectForce.Count() );
for ( int objectIndex = pObjectList.Count()-1; objectIndex >= 0; --objectIndex )
{
sum += objectForce[objectIndex].Length();
for ( int i = 0; i < 3; i++ )
{
if ( objectForce[objectIndex][i] < 0 )
{
negativeForce[i] -= objectForce[objectIndex][i];
}
else
{
positiveForce[i] += objectForce[objectIndex][i];
}
}
}
// "external" stress is two way (something pushes on the object and something else pushes back)
// so the set of minimum values per component are the projections of the two-way force
// "internal" stress is one way (the object is pushing against something OR something pushing back)
// the momentum must have come from inside the object (gravity, controller, etc)
Vector internalForce = vec3_origin;
Vector externalForce = vec3_origin;
for ( int i = 0; i < 3; i++ )
{
if ( negativeForce[i] < positiveForce[i] )
{
internalForce[i] = positiveForce[i] - negativeForce[i];
externalForce[i] = negativeForce[i];
}
else
{
internalForce[i] = negativeForce[i] - positiveForce[i];
externalForce[i] = positiveForce[i];
}
}
// sum is kg in / s
Vector gravVector;
physenv->GetGravity( &gravVector );
float gravity = gravVector.Length();
if ( pInputOwnerEntity->GetMoveType() != MOVETYPE_VPHYSICS && pObject->IsMoveable() )
{
Vector lastVel;
lastVel.Init();
if ( pObject->GetShadowController() )
{
pObject->GetShadowController()->GetLastImpulse( &lastVel );
}
else
{
if ( ( pObject->GetCallbackFlags() & CALLBACK_IS_PLAYER_CONTROLLER ) )
{
CBasePlayer *pPlayer = ToBasePlayer( pInputOwnerEntity );
IPhysicsPlayerController *pController = pPlayer ? pPlayer->GetPhysicsController() : NULL;
if ( pController )
{
pController->GetLastImpulse( &lastVel );
}
}
}
// Work in progress...
// Peek into the controller for this object. Look at the input velocity and make sure it's all
// accounted for in the computed stress. If not, redistribute external to internal as it's
// probably being reflected in a way we can't measure here.
float inputLen = lastVel.Length() * (1.0f / physenv->GetSimulationTimestep()) * objMass;
if ( inputLen > 0.0f )
{
float internalLen = internalForce.Length();
if ( internalLen < inputLen )
{
float ratio = internalLen / inputLen;
Vector delta = internalForce * (1.0f - ratio);
internalForce += delta;
float deltaLen = delta.Length();
sum -= deltaLen;
float extLen = VectorNormalize(externalForce) - deltaLen;
if ( extLen < 0 )
{
extLen = 0;
}
externalForce *= extLen;
}
}
}
float invGravity = gravity;
if ( invGravity <= 0 )
{
invGravity = 1.0f;
}
else
{
invGravity = 1.0f / invGravity;
}
sum *= invGravity;
internalForce *= invGravity;
externalForce *= invGravity;
if ( !pObject->IsMoveable() )
{
// the above algorithm will see almost all force as internal if the object is not moveable
// (it doesn't push on anything else, so nothing is reciprocated)
// exceptions for friction of a single other object with multiple contact points on this object
// But the game wants to see it all as external because obviously the object can't move, so it can't have
// internal stress
externalForce = internalForce;
internalForce.Init();
if ( !pObject->IsStatic() )
{
sum += objMass;
}
}
else
{
// assume object is at rest
if ( sum > objMass )
{
sum = objMass + (sum-objMass) * 0.5;
}
}
if ( pOutput )
{
pOutput->exertedStress = internalForce.Length();
pOutput->receivedStress = externalForce.Length();
pOutput->hasNonStaticStress = pObjectList.Count() > 2 ? true : false;
pOutput->hasLargeObjectContact = hasLargeObject;
}
// sum is now kg
return sum;
}
