123 lines
3.5 KiB
C#
123 lines
3.5 KiB
C#
using System;
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using UnityEngine;
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namespace AibisDream.FixSystem
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{
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[RequireComponent(typeof(LineRenderer))]
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public class Cable : MonoBehaviour
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{
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private Transform _start;
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private Transform _end;
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private LineRenderer _lineRenderer;
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private Vector3[] _points;
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private CableSystem _cableSystem;
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[SerializeField]
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private CableConfig config = CableConfig.GeneDefaultConfig();
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private void Start()
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{
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InitComponentRefs();
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InitPoints();
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}
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private void InitComponentRefs()
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{
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_cableSystem = transform.parent.GetComponent<CableSystem>();
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_lineRenderer = GetComponent<LineRenderer>();
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_lineRenderer.positionCount = config.resolution;
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// 连线起止点
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_start = _cableSystem.CableRootPos;
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_end = _cableSystem.PlugRef.transform;
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}
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private void InitPoints()
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{
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_points = new Vector3[config.resolution];
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for (int i = 0; i < config.resolution; i++)
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{
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float t = i / (float)(config.resolution - 1);
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_points[i] = Vector3.Lerp(_start.position, _end.position, t);
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}
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}
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private void FixedUpdate()
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{
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DrawLine();
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}
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void DrawLine()
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{
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var points = UpdateRope();
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for (int i = 0; i < config.resolution; i++)
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{
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_lineRenderer.SetPosition(i, points[i] + Vector3.forward * -.3f);
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}
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}
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Vector3[] UpdateRope()
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{
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float t = Mathf.InverseLerp(config.dstMin, config.dstMax, (_start.position - _end.position).magnitude);
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float F = Mathf.Lerp(config.forceMin, config.forceMax, t);
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_points[0] = _start.position;
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_points[^1] = _end.position;
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for (int ik = 0; ik < config.k; ik++)
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{
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for (int i = 1; i < _points.Length - 1; i++)
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{
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Vector3 offsetPrev = _points[i - 1] - _points[i];
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Vector3 offsetNext = _points[i + 1] - _points[i];
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Vector3 velocity = offsetPrev.normalized * (offsetPrev.magnitude * F) +
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offsetNext.normalized * (offsetNext.magnitude * F);
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_points[i] += velocity * Time.deltaTime / config.k;
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}
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for (int i = 1; i < _points.Length - 1; i++)
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{
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_points[i] += Vector3.down * (9.8f * Time.deltaTime) / config.k;
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}
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}
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return _points;
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}
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/// <summary>
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/// 为线缆设置末端点
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/// </summary>
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/// <param name="endPos">末端点</param>
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public void SetEndPos(Transform endPos)
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{
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_end = endPos;
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}
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}
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[Serializable]
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public struct CableConfig
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{
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public int resolution;
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public float dstMin;
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public float dstMax;
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public float forceMin;
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public float forceMax;
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public int k;
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public static CableConfig GeneDefaultConfig()
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{
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return new CableConfig()
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{
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resolution = 10,
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dstMin = 0.1f,
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dstMax = 1.0f,
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forceMin = 0.1f,
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forceMax = 150f,
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k = 10
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};
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}
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}
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} |