/// <summary> /// Combines wandering and separation /// </summary> public static void Wander(IAgent agent, IAgent[] otherAgents, ref Steering.SteerParameters steerParams) { // add up the steering forces Vector3 wander = Steering.WanderForce(agent, ref steerParams); Vector3 separation = Vector3.Zero; Vector3 bounds = Steering.WorldBoundsForce(agent, steerParams); int avoiding = 0; for (int i = 0; i < otherAgents.Length; i++) { IAgent otherAgent = otherAgents[i]; if (agent != otherAgent) { float separationDistance = Vector3.Distance(agent.Position, otherAgent.Position); if (separationDistance < steerParams.SeparationRange) { separation += Steering.SeparationForce(agent, otherAgent, steerParams, separationDistance); avoiding++; } } } agent.Direction = Vector3.Normalize(agent.Direction + wander + separation + bounds); }
/// <summary> /// Combines wandering, cohesion, separation, and alignment steering such that the agent moves /// together with other members in the flock /// </summary> public static void Flock(IAgent agent, IAgent[] flockMembers, ref Steering.SteerParameters steerParams) { Vector3 wander = Steering.WanderForce(agent, ref steerParams); Vector3 separation = Vector3.Zero; Vector3 cohesion = Vector3.Zero; Vector3 alignment = Vector3.Zero; Vector3 worldForce = Steering.WorldBoundsForce(agent, steerParams); Vector3 goalForce = Steering.GoalForce(agent, steerParams); int alignmentWith = 0; int cohesionWith = 0; for (int i = 0; i < flockMembers.Length; i++) { IAgent otherAgent = flockMembers[i]; if (agent != otherAgent) { float separationDistance = Vector3.Distance(agent.Position, otherAgent.Position); if (separationDistance < steerParams.SeparationRange) separation += Steering.SeparationForce(agent, otherAgent, steerParams, separationDistance); else { cohesion += Steering.CohesionForce(agent, otherAgent, steerParams); cohesionWith++; float scale = MathHelper.Clamp(1 - separationDistance / steerParams.AlignmentRange, 0, 1); if (scale > 0) { alignment += Steering.AlignmentForce(otherAgent, steerParams) * scale; alignmentWith++; } } } } if (cohesionWith > 1) cohesion /= cohesionWith; if (alignmentWith > 1) alignment /= alignmentWith; agent.Direction = Vector3.Normalize(agent.Direction + wander + separation + cohesion + alignment + worldForce + goalForce); }
public void SetSteeringParameters(Steering.SteerParameters steerParams) { this.steerParams = steerParams; }
public void ApplySteerParameters(Steering.SteerParameters steerParams) { foreach (Bird b in birdFlock.Agents) b.SetSteeringParameters(steerParams); }