68 lines
2.5 KiB
C#
68 lines
2.5 KiB
C#
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namespace Fusion.Addons.InterestManagement
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{
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using UnityEngine;
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/// <summary>
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/// Provides interest to players within certain view angle and distance from this object.
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/// </summary>
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public sealed class InterestByView : InterestProvider
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{
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// PUBLIC MEMBERS
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[Range(0.0f, 90.0f)]
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[InlineHelp][Tooltip("Maximum angle between player camera look direction and direction to this object.")]
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public float MaxViewAngle;
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[InlineHelp][Tooltip("Minimum distance from player camera to this object.")]
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public float MinViewDistance;
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[InlineHelp][Tooltip("Maximum distance from player camera to this object.")]
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public float MaxViewDistance;
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// PRIVATE MEMBERS
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private float _cachedAngle;
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private float _cachedAngleCos;
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// InterestProvider INTERFACE
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/// <summary>
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/// Returns whether this provider should be processed for given player.
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/// </summary>
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/// <param name="playerView">Player interest view with player information used for filtering.</param>
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public override bool IsPlayerInterested(PlayerInterestView playerView)
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{
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Vector3 positionDifference = Transform.position - playerView.CameraPosition;
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// We compare player camera position against transform of this object.
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// It is enough for relatively small objects, bigger objects might need a special handling - distance from a closest point on bounding box for example.
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float sqrDistance = Vector3.SqrMagnitude(positionDifference);
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if (sqrDistance > MaxViewDistance * MaxViewDistance || sqrDistance < MinViewDistance * MinViewDistance)
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return false;
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if (_cachedAngle != MaxViewAngle)
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{
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_cachedAngle = MaxViewAngle;
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_cachedAngleCos = Mathf.Cos(MaxViewAngle * Mathf.Deg2Rad);
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}
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float dot = Vector3.Dot(playerView.CameraDirection, Vector3.Normalize(positionDifference));
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if (dot < _cachedAngleCos)
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return false;
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return true;
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}
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/// <summary>
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/// Called when an object with InterestByView or PlayerInterestManager component is selected.
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/// </summary>
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/// <param name="playerView">Provides player information, is valid only if the selected object has PlayerInterestManager component.</param>
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/// <param name="isSelected">True if the selected object has this component, false otherwise.</param>
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protected override void OnDrawGizmosForPlayer(PlayerInterestView playerView, bool isSelected)
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{
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if (isSelected == true)
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{
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InterestUtility.DrawAngle(Transform.position - Transform.rotation * Vector3.forward * MaxViewDistance, Transform.rotation, MaxViewAngle, MinViewDistance, MaxViewDistance, Color.green);
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}
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}
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}
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}
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