private void UpdateAI(AI ai)
{
//get the right sensor to use
for (int i = 0; i <= ai.Senses.Sensors.Count; i++)
{
if (ai.Senses.Sensors [i].SensorName == SensorToUse.VariableName)
{
UpdateSensor = ai.Senses.Sensors [i] as VisualSensor;
break;
}
}
//use found sensor to get closest 1 match
UpdateSensor.Sense(EnemyEntityToDetect.VariableName, RAINSensor.MatchType.BEST);
if (UpdateSensor.Matches.Count > 0)
{
//store the found enemy location
Vector3 enemyLoc = UpdateSensor.Matches [0].Position;
//Save stored value in current ai memory
ai.WorkingMemory.SetItem(EnemyStoreVariable.VariableName, enemyLoc);
}
}
private void FindBestCoverPoint(AI ai)
{
if (!StoreCoverVarInName.IsValid || !StoreCoverVarInName.IsVariable)
{
return;
}
//We don't actually have to have an enemy. We can choose cover points that are simply near ourselves.
Vector3 tEnemyPosition = ai.Kinematic.Position;
//Assign a current enemy target
if (EnemyVariable.IsValid && EnemyVariable.IsVariable)
{
//using a MoveLookTarget lets us automatically convert between gameObject, Vector3, etc., when getting
//a position from AI memory
tTarget = MoveLookTarget.GetTargetFromVariable(ai.WorkingMemory, EnemyVariable.VariableName, ai.Motor.CloseEnoughDistance);
if (tTarget.IsValid)
{
tEnemyPosition = tTarget.Position;
}
}
//Cover points should be marked with the "cover" entity
for (int i = 0; i <= ai.Senses.Sensors.Count; i++)
{
if (ai.Senses.Sensors [i].SensorName == CoverDetector.VariableName)
{
CoverSensor = ai.Senses.Sensors [i] as VisualSensor;
break;
}
}
CoverSensor.Sense(CoverEntityName.VariableName, RAINSensor.MatchType.ALL);
Vector3 previousCoverAspect = ai.Kinematic.Position;;
//Default cover point is our own position
float bestCost = float.MaxValue;
Vector3 tCoverPosition = ai.Kinematic.Position;
//return the closest position out of all found positions
//that the player cannot see.
for (int i = 0; i < CoverSensor.Matches.Count; i++)
{
//if your current enemy can see the cover position skip it.
//This makes the AI choose a more defensable position.
Vector3 ray = (tTarget.Position + adjustment);
Vector3 direction = (CoverSensor.Matches[i].Position - (tTarget.Position + adjustment));
RaycastHit hit;
if (Physics.Raycast(ray, direction, out hit, 100.0f))
{
if (hit.collider.transform.gameObject.GetComponent <CoverSpot> ())
{
if (hit.collider.transform.gameObject == CoverSensor.Matches [i].MountPoint.gameObject)
{
continue;
}
}
}
//find all cover matches
RAINAspect tCandidateAspect = CoverSensor.Matches[i];
if (tCandidateAspect == null)
{
continue;
}
//Cover points are AIObjectives, which are objects that allow AI to "occupy" them
CoverSpot tObjective = tCandidateAspect.Entity.Form.GetComponent <CoverSpot>();
//Skip occupied cover points
if ((tObjective != null) && (tObjective.isTaken) && (tObjective.occupant == ai.Body))
{
previousCoverSpot = tObjective;
previousCoverAspect = tCandidateAspect.Position;
continue;
}
if ((tObjective == null) || (tObjective.isTaken && tObjective.occupant != ai.Body))
{
continue;
}
//Our cost function gives 50% more weight to points near the enemy
//But then also adds in the AI distance to the point
float tCost = 1.5f * Vector3.Distance(tEnemyPosition, tCandidateAspect.Position) + Vector3.Distance(ai.Kinematic.Position, tCandidateAspect.Position);
if (tCost < bestCost)
{
currentCoverPoint = tObjective;
tCoverPosition = tCandidateAspect.Position;
bestCost = tCost;
}
}
//If we found a cover point, then occupy it
if (currentCoverPoint != null)
{
if (previousCoverSpot != null)
{
previousCoverSpot.LeaveSpot(ai.Body);
}
currentCoverPoint.TakeSpot(ai.Body);
}
else if (previousCoverSpot != null)
{
tCoverPosition = previousCoverAspect;
previousCoverSpot.TakeSpot(ai.Body);
}
//Set the cover position in AI memory
ai.WorkingMemory.SetItem <Vector3>(StoreCoverVarInName.VariableName, tCoverPosition);
}