85 lines
2.4 KiB
C#
85 lines
2.4 KiB
C#
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using UnityEngine;
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#if UNITY_EDITOR
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using NWH.DWP2.NUI;
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using NWH.DWP2.SailController;
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using UnityEditor;
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#endif
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namespace NWH.DWP2.SailController
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{
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/// <summary>
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/// Applies the drag force to the hull based on the wind speed.
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/// Does not take the waterline into account so dimensions should be for the part of the
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/// hull above the water.
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/// </summary>
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public class HullWindApplicator : MonoBehaviour
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{
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/// <summary>
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/// The dimensions of the object (x = width, y = height, z = length).
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/// </summary>
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[Tooltip("The dimensions of the object (x = width, y = height, z = length).")]
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[SerializeField]
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public Vector3 dimensions;
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/// <summary>
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/// The drag coefficient of the object.
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/// </summary>
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[Tooltip("The drag coefficient of the object.")]
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[SerializeField]
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public float dragCoefficient = 1.0f;
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private Rigidbody _rb;
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private void Start()
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{
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_rb = GetComponentInParent<Rigidbody>();
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Debug.Assert(_rb != null, "Rigidbody not found on self or parents.");
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}
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private void FixedUpdate()
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{
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if (WindGenerator.Instance == null) return;
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// Calculate the frontal area of the object facing the wind
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Vector3 windDirection = WindGenerator.Instance.CurrentWind.normalized;
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float projectedArea = Mathf.Abs(Vector3.Dot(dimensions, windDirection));
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// Calculate the wind force
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float windSpeed = WindGenerator.Instance.CurrentWind.magnitude;
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float windForceMagnitude = 0.5f * dragCoefficient * projectedArea * Mathf.Pow(windSpeed, 2);
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Vector3 windForce = windDirection * windForceMagnitude;
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// Apply the wind force to the Rigidbody
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_rb.AddForce(windForce);
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}
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}
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}
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#if UNITY_EDITOR
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namespace NWH.DWP2.SailController
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{
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[CustomEditor(typeof(HullWindApplicator))]
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[CanEditMultipleObjects]
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public class HullWindApplicatorEditor : DWP_NUIEditor
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{
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public override bool OnInspectorNUI()
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{
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if (!base.OnInspectorNUI())
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{
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return false;
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}
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drawer.Field("dimensions");
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drawer.Field("dragCoefficient");
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drawer.EndEditor(this);
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return true;
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}
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}
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}
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#endif
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