Vector3 applyChase(algorithmBoid theBoid)
{
temp = Vector3.zero;
temp = target.position - theBoid.boidTransform.position;
return temp.normalized * chaseStrength;
}
Vector3 applyAlignment(algorithmBoid theBoid)
{
temp = Vector3.zero;
foreach( algorithmBoid flockmate in flock)
{
if (flockmate.boidTransform.gameObject.GetInstanceID() != theBoid.boidTransform.gameObject.GetInstanceID())
{
temp += (flockmate.boidTransform.position - flockmate.lastPosition);
}
}
temp = temp / (initialNumberOfBoids - 1);
return (temp - theBoid.velocity) / alignmentStrength; //removing the "Velocity" part makes them swarm around each other / - theBoid.velocity
}
Vector3 applyCohesion(algorithmBoid theBoid)
{
temp = Vector3.zero;
foreach (algorithmBoid flockmate in flock)
{
if(flockmate.boidTransform.gameObject.GetInstanceID() != theBoid.boidTransform.gameObject.GetInstanceID())
{
temp += flockmate.boidTransform.position;
}
}
temp = temp / (initialNumberOfBoids -1);
return (temp - theBoid.boidTransform.position) / cohesionStrength;
}
Vector3 applyDodge(algorithmBoid theBoid)
{
temp = Vector3.zero;
if(Vector3.Distance(theBoid.boidTransform.position, target.position) < dodgeRadius)
{
temp = theBoid.boidTransform.position - target.position;
}
return temp.normalized * dodgeStrength;
}
// Update is called once per frame
void Update()
{
for (int i = 0; i < flock.Count; i++)
{
tempBoid = flock[i];
separationResult = applySeparation(flock[i]);
alignmentResult = applyAlignment(flock[i]);
cohesionResult = applyCohesion(flock[i]);
if (chase) chaseResult = applyChase(flock[i]);
else chaseResult = Vector3.zero;
dodgeResult = applyDodge(flock[i]);
tempBoid.velocity += separationResult + alignmentResult + cohesionResult + chaseResult + dodgeResult;
Ray findWall = new Ray(flock[i].boidTransform.position, flock[i].velocity);
//If we would have hit a wall, we will move away from it, because that'd just be unboidlike
RaycastHit myRaycastHit;
if (Physics.Raycast(findWall, out myRaycastHit, detectWallDistance, 1 << 8))
{
Vector3 moveAwayVector = (flock[i].boidTransform.position - myRaycastHit.point).normalized;
moveAwayVector = moveAwayVector - new Vector3(0, moveAwayVector.y, 0);
tempBoid.velocity += moveAwayVector * wallDetectionStrength
+ Vector3.Cross(flock[i].velocity, flock[i].boidTransform.up).normalized * wallMoveStrength;
//gets a vector "sideways away" from the wall
}
tempBoid.lastPosition = flock[i].boidTransform.position;
tempBoid.boidTransform.position += flock[i].velocity * boidSpeed * Time.deltaTime;
flock[i] = tempBoid;
//flock[i].lastPosition = flock[i].boidTransform.position;
}
}
//Below are implementations of the boids algorithm functions provided to us
Vector3 applySeparation(algorithmBoid theBoid)
{
temp = Vector3.zero;
foreach (algorithmBoid flockMate in flock)
{
if (flockMate.boidTransform.gameObject.GetInstanceID() != theBoid.boidTransform.gameObject.GetInstanceID())
{
if(Vector3.Distance(theBoid.boidTransform.position,flockMate.boidTransform.position) < separationRadius)
{
temp = temp - (flockMate.boidTransform.position - theBoid.boidTransform.position);
}
}
}
return temp;
}
