57 lines
2.2 KiB
C#
57 lines
2.2 KiB
C#
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using UnityEngine;
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using BehaviorDesigner.Runtime.Tasks;
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using Tooltip = BehaviorDesigner.Runtime.Tasks.TooltipAttribute;
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using HelpURL = BehaviorDesigner.Runtime.Tasks.HelpURLAttribute;
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namespace BehaviorDesigner.Runtime.Formations.Tasks
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{
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[TaskCategory("Formations")]
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[TaskDescription("Arrange the group in an arc.")]
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[TaskIcon("Assets/Behavior Designer Formations/Editor/Icons/{SkinColor}ArcIcon.png")]
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[HelpURL("https://www.opsive.com/support/documentation/behavior-designer-formations-pack/")]
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public class Arc : NavMeshFormationGroup
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{
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[Tooltip("The radius of the arc")]
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public SharedFloat radius = 5;
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[Tooltip("Is the arc concave?")]
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public SharedBool concave = true;
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private float theta;
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protected override void AddAgentToGroup(Behavior agent, int index)
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{
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base.AddAgentToGroup(agent, index);
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// Multiply by 2 to form an arc up to 180 degrees.
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theta = Mathf.PI / (agents.Count * 2);
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}
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protected override int RemoveAgentFromGroup(Behavior agent)
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{
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var index = base.RemoveAgentFromGroup(agent);
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// Multiply by 2 to form an arc up to 180 degrees.
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theta = Mathf.PI / (agents.Count * 2);
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return index;
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}
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protected override Vector3 TargetPosition(int index, float zLookAhead)
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{
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// Alternate between the left and right sides of the leader. If convex then add PI so the agents form the back side of the circle.
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// Convex arcs will also increase their relative z position so the agents are ahead of the leader.
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var radians = theta * (((index - 1) / 2) + 1) + (concave.Value ? 0 : Mathf.PI);
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var leaderTransform = leader.Value == null ? transform : leader.Value.transform;
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return leaderTransform.TransformPoint(radius.Value * Mathf.Sin(radians) * (index % 2 == 0 ? -1 : 1), 0,
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radius.Value * Mathf.Cos(radians) + radius.Value * (concave.Value ? -1 : 1) + zLookAhead);
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}
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public override void OnReset()
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{
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base.OnReset();
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radius = 5;
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concave = true;
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}
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}
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}
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