// RULE1: Boids try to fly towards the centre of mass of neighbouring boids
private Vector3 cohesionRule(AEnemys curShip)
{
Vector3 pcj = Vector3.Zero;
int count = 0;
foreach (var otherShip in _ships)
{
if (otherShip != curShip && Vector3.Distance(otherShip.Position, curShip.Position) < _cohesionRadius)
{
pcj += otherShip.Position;
count++;
}
}
if (count > 0)
{
pcj /= count;
}
else
{
return(Vector3.Zero);
}
//richtungsvektor zur 'masse'
return(pcj - curShip.Position);
}
// some logic for the fighters
private Vector3 droneStationRuleFighter(AEnemys curShip)
{
float distanceToDrone = Vector3.Distance(curShip.Position, Global.Camera.Target);
if (curShip.flyingAwayFromDrone)
{
if (distanceToDrone < _avoidDroneRadius)
{
return(-goToPlace(curShip, Global.Camera.Target) / distanceToDrone);
}
else
{
curShip.flyingAwayFromDrone = false;
}
}
else
{
if (distanceToDrone < _flyToDroneRadius)
{
if (distanceToDrone < _avoidObjRadius)
{
curShip.flyingAwayFromDrone = true;
}
else
{
return(goToPlace(curShip, Global.Camera.Target));
}
}
else if (curShip.Position.Length() > _flyToStationRadius)
{
return(goToPlace(curShip, Vector3.Zero));
}
}
return(Vector3.Zero);
}
// RULE2.5: Boids try to keep a small distance away from other Objects
private Vector3 avoidObjRule(AEnemys curShip)
{
Vector3 c = Vector3.Zero;
foreach (var curObj in objectsToAvoid)
{
float distance = Vector3.Distance(curObj.Position, curShip.Position);
if (curObj != curShip && distance < _avoidObjRadius)
{
c -= (curObj.Position - curShip.Position);
}
}
return(c);
}
// RULE2: Boids try to keep a small distance away from other boids
private Vector3 avoidBoidRule(AEnemys curShip)
{
Vector3 c = Vector3.Zero;
foreach (var otherShip in _ships)
{
float distanceDiff = Vector3.Distance(otherShip.Position, curShip.Position) - _avoidBoidsRadius;
if (otherShip != curShip && distanceDiff < 0)
{
c -= (otherShip.Position - curShip.Position);
}
}
return(c);
}
// some logic for the bombers
private Vector3 droneStationRuleBomber(AEnemys curShip)
{
float distanceToDrone = Vector3.Distance(curShip.Position, Global.Camera.Target);
double distanceToStation = curShip.Position.Length();
if (distanceToDrone < 200)
{
curShip.flyingAwayFromDrone = true;
}
if (distanceToStation < 200)
{
curShip.flyingAwayFromStation = true;
}
if (curShip.flyingAwayFromDrone)
{
if (distanceToDrone < 300)
{
return(-goToPlace(curShip, Global.Camera.Target));
}
else
{
curShip.flyingAwayFromDrone = false;
}
}
else if (curShip.flyingAwayFromStation)
{
if (distanceToStation > Global.MapRingRadius + 75)
{
curShip.flyingAwayFromStation = false;
}
else
{
return(-goToPlace(curShip, Vector3.Zero));
}
}
else
{
return(goToPlace(curShip, Vector3.Zero));
}
return(Vector3.Zero);
}
// RULE3: Boids try to match velocity with near boids
private Vector3 aligningRule(AEnemys curShip)
{
Vector3 pvj = Vector3.Zero;
int count = 0;
foreach (var otherShip in _ships)
{
float distance = Vector3.Distance(otherShip.Position, curShip.Position);
if (otherShip != curShip && distance < _aligningRadius)
{
pvj += otherShip.Direction;
count++;
}
}
if (count > 0)
{
pvj /= count;
}
return(pvj);
}
private Vector3 avoidStationRule(AEnemys curShip)
{
var awayVector = -goToPlace(curShip, Vector3.Zero);
var shipDist = curShip.Position.Length();
if (shipDist < _avoidStationRadius)
{
var leftVectorLength = (curShip.Position + curShip.RotationMatrix.Left).Length();
var rightVectorLength = (curShip.Position + curShip.RotationMatrix.Right).Length();
// ship is left of station, fly left
if (leftVectorLength > rightVectorLength)
{
return((new Vector3(awayVector.Z, 0, -awayVector.X) + awayVector) / shipDist);
}
// ship is right of station, fly right
else
{
return((new Vector3(-awayVector.Z, 0, awayVector.X) + awayVector) / shipDist);
}
}
return(Vector3.Zero);
}
private Vector3 goToPlace(AEnemys curShip, Vector3 place)
{
Vector3 placeDir = place - curShip.Position;
return(placeDir);
}
