bool CNavigationPath::PathIsClear (CSystem *pSystem,
CSovereign *pSovereign,
const CVector &vFrom,
const CVector &vTo,
CSpaceObject **retpEnemy,
CVector *retvAway)
// PathIsClear
//
// Returns TRUE if the path from vFrom to vTo is free from enemy stations.
// If FALSE, retpEnemy is initialized with the enemy that is blocking the
// path and retvAway is a unit vector away from the enemy that avoids it
{
int i;
// Loop over all objects in the system
CSpaceObject *pNearestEnemy = NULL;
Metric rNearestDist = MAX_SAFE_DIST;
CVector vNearestAway;
for (i = 0; i < pSystem->GetObjectCount(); i++)
{
CSpaceObject *pObj = pSystem->GetObject(i);
CSovereign *pObjSovereign;
if (pObj
&& (pObj->GetScale() == scaleStructure
|| ((pObj->GetScale() == scaleShip) && (pObj->GetVel().Length2() < MIN_SPEED2)))
&& (pObjSovereign = pObj->GetSovereign())
&& (pObjSovereign->IsEnemy(pSovereign))
&& pObj->CanAttack())
{
CVector vAway;
Metric rDist = CalcDistanceToPath(pObj->GetPos(), vFrom, vTo, NULL, &vAway);
if (rDist < rNearestDist)
{
rNearestDist = rDist;
pNearestEnemy = pObj;
vNearestAway = vAway;
}
}
}
// If we found a threatening object, return it
if (pNearestEnemy)
{
if (retpEnemy)
*retpEnemy = pNearestEnemy;
if (retvAway)
*retvAway = vNearestAway;
return false;
}
// Otherwise, the path is OK
return true;
}
bool CDamageSource::IsCausedByEnemyOf (CSpaceObject *pObj) const
// IsCausedByEnemyOf
//
// Returns TRUE if the damage is caused by an object that is
// an enemy of pObj.
{
if (IsCausedByPlayer())
{
CSovereign *pSovereign = pObj->GetSovereign();
return (pSovereign ? pSovereign->IsEnemy(g_pUniverse->GetPlayerSovereign()) : false);
}
else
return (m_pSource && m_pSource->CanAttack() && pObj->IsEnemy(m_pSource));
}
CSovereign *GetAttackerSovereign (CUniverse &Universe, CStationType *pDefenderType)
{
int i;
CSovereign *pDefenderSovereign = pDefenderType->GetSovereign();
if (pDefenderSovereign)
{
for (i = 0; i < Universe.GetSovereignCount(); i++)
{
CSovereign *pSovereign = Universe.GetSovereign(i);
if (pDefenderSovereign->IsEnemy(pSovereign))
return pSovereign;
}
}
return NULL;
}
