protected override void OnNextMove()
{
base.OnNextMove();
// only attack if not blocked there.
if (IsAttacking && !ParentThing.CollidesWithBackground(Leader.FacingDirection))
{
TargetMove = Leader.FacingDirection;
IsTargetMoveDefined = true;
}
}
protected override void OnUpdate(ref UpdateParams p)
{
base.OnUpdate(ref p);
Vector2 rightHandDirection = RotateVector2(CurrentDirection, MathHelper.PiOver2);
Vector2 leftHandDirection = RotateVector2(CurrentDirection, -MathHelper.PiOver2);
bool isRightHandFree = !ParentThing.CollidesWithBackground(rightHandDirection);
bool isLeftHandFree = !ParentThing.CollidesWithBackground(leftHandDirection);
bool isFrontFree = !ParentThing.CollidesWithBackground(CurrentDirection);
// keep this control active if near walls
if (didSeeWall || !isRightHandFree || !isLeftHandFree || !isFrontFree)
{
IsTargetMoveDefined = true;
AllowNextMove();
}
}
protected override void OnNextMove()
{
base.OnNextMove();
Vector2 rightHandDirection = RotateVector2(CurrentDirection, MathHelper.PiOver2);
Vector2 leftHandDirection = RotateVector2(CurrentDirection, -MathHelper.PiOver2);
bool isRightHandFree = !ParentThing.CollidesWithBackground(rightHandDirection);
bool isLeftHandFree = !ParentThing.CollidesWithBackground(leftHandDirection);
bool isFrontFree = !ParentThing.CollidesWithBackground(CurrentDirection);
// change direction to righthand if that's free
if (didSeeWall && isRightHandFree)
{
CurrentDirection = rightHandDirection;
didSeeWall = false;
TargetMove = CurrentDirection;
IsTargetMoveDefined = true;
}
else if (!isFrontFree)
{
// turn left if the way is blocked
CurrentDirection = leftHandDirection;
didSeeWall = true;
}
else if (didSeeWall || !isRightHandFree || !isLeftHandFree || !isFrontFree)
{
TargetMove = CurrentDirection;
IsTargetMoveDefined = true;
}
if (!isRightHandFree)
{
didSeeWall = true;
}
}
protected override void OnNextMove()
{
base.OnNextMove();
// compute direction towards chase-target
Vector2 dif = ChaseTarget.Position - ParentThing.Target;
if (Avoidance)
{
dif = -dif;
}
if (dif.Length() == 0f)
{
return;
}
Vector2 difX = new Vector2(dif.X, 0f);
Vector2 difY = new Vector2(0f, dif.Y);
if (difX.Length() > 0f)
{
difX.Normalize();
}
if (difY.Length() > 0f)
{
difY.Normalize();
}
// whats-free
bool isBlockedX = (difX.X != 0f) && ParentThing.ChecksCollisions && ParentThing.CollidesWithBackground(difX);
bool isBlockedY = (difY.Y != 0f) && ParentThing.ChecksCollisions && ParentThing.CollidesWithBackground(difY);
bool isFullyBlocked = (isBlockedX && (dif.Y == 0f)) ||
(isBlockedY && (dif.X == 0f)) ||
(isBlockedX && isBlockedY);
bool isDiagonal = (dif.X != 0f) && (dif.Y != 0f);
// choose one direction 1) based on whats free, then 2) semi-randomly, if diagonals would be required
isPauseChase = false;
if (isFullyBlocked)
{
dif = new Vector2(difY.Y, difX.X); // try a swap to get around obstacle
}
else if (isBlockedX) // choose Y move if x is blocked
{
dif = difY;
}
else if (isBlockedY) // choose X move if y is blocked
{
dif = difX;
}
else if (isDiagonal) // choose random x/y if a diagonal move would be required
{
float r = RandomMath.RandomUnit();
float thres = 0.5f;
if (r > thres)
{
dif = difX;
}
else
{
dif = difY;
}
}
else
{
dif.Normalize();
}
TargetMove = dif;
}
