// Add a little variation into the steering.
private Vector2 Wander()
{
// Update wanderTheta.
wanderTheta += SlagMath.GenerateGaussianNoise(WANDER_VARIANCE, GameResources.ActorManager.Random);
while (wanderTheta > MathHelper.Pi)
{
wanderTheta -= MathHelper.TwoPi;
}
while (wanderTheta < -MathHelper.Pi)
{
wanderTheta += MathHelper.TwoPi;
}
Vector2 newHeading = Vector2.UnitY * WANDER_DISTANCE +
new Vector2((float)(-Math.Sin(wanderTheta)), (float)(Math.Cos(wanderTheta))) * WANDER_RADIUS;
if (newHeading.X == 0.0f && newHeading.Y == 0.0f)
{
return(Vector2.Zero);
}
newHeading.Normalize();
return(newHeading);
}
public ZombieWanderState(float avgDurationSeconds)
{
mDurationTicks = (long)(TimeSpan.TicksPerSecond * (Math.Max(avgDurationSeconds + SlagMath.GenerateGaussianNoise(avgDurationSeconds * avgDurationSeconds * 0.25f,
GameResources.ActorManager.Random), 0.25f)));
}