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ROPE

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This commit is contained in:
BobSong
2026-01-18 22:27:22 +08:00
parent 331ec8c8bf
commit 120b8cda26
9 changed files with 3269 additions and 14 deletions
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2922
Assets/Scenes/FishingRopeTest.unity Normal file
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Assets/Scenes/FishingRopeTest.unity.meta Normal file
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58
Assets/Scenes/StartUp.unity
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Assets/Scripts/Common/FPSShower.cs Normal file
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using System;
using TMPro;
using UnityEngine;
namespace NBF
{
public class FPSShower : MonoBehaviour
{
public TextMeshProUGUI TextFPS;
public float updateInterval = 0.2f; // 更新间隔（秒）
private float accum = 0;
private int frames = 0;
private float timeleft;
private void Awake()
{
Application.targetFrameRate = 300; // 设为极高值
}
public int FPS;
void Update()
{
timeleft -= Time.deltaTime;
accum += Time.timeScale / Time.deltaTime;
frames++;
if (timeleft <= 0.0f)
{
FPS = (int)(accum / frames);
timeleft = updateInterval;
accum = 0.0f;
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TextFPS.text = FPS.ToString();
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}
}

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Assets/Scripts/Common/FPSShower.cs.meta Normal file
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215
Assets/Scripts/Common/FishingRope.cs Normal file
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using UnityEngine;
namespace NBF
{
[RequireComponent(typeof(LineRenderer))]
public class FishingRope : MonoBehaviour
{
[Header("Demo Parameters")] [SerializeField, Min(0)]
float mouseOffset = 10f;
[Header("Verlet Parameters")] [SerializeField]
float nodeDistance = 0.35f;
[SerializeField] float nodeColliderRadius = 0.2f;
[SerializeField] float gravityStrength = 2;
[SerializeField, Range(1, 500)] int totalNodes = 100;
[SerializeField, Range(0, 1)] float velocityDampen = 0.95f;
[SerializeField, Range(0, 0.99f)] float stiffness = 0.8f;
[SerializeField, Range(1, 10)] int iterateCollisionsEvery = 1;
[SerializeField, Range(1, 200)] int iterations = 10;
[SerializeField] int colliderBufferSize = 1;
[Header("Line Renderer")] [SerializeField]
float ropeWidth = 0.02f;
// 私有变量
Camera cam;
Vector3 gravity;
Vector3 startLock;
Vector3 endLock;
bool isStartLocked = false;
bool isEndLocked = false;
// 数组和缓存
Vector3[] currentNodePositions;
Vector3[] previousNodePositions;
Collider[] colliderHitBuffer;
LineRenderer lineRenderer;
GameObject nodeTester;
SphereCollider nodeCollider;
void Awake()
{
// 初始化数组
currentNodePositions = new Vector3[totalNodes];
previousNodePositions = new Vector3[totalNodes];
colliderHitBuffer = new Collider[colliderBufferSize];
// 获取组件引用
lineRenderer = GetComponent<LineRenderer>();
cam = Camera.main;
gravity = new Vector3(0, -gravityStrength, 0);
// 初始化节点测试器
nodeTester = new GameObject("Node Tester");
nodeTester.layer = 8;
nodeCollider = nodeTester.AddComponent<SphereCollider>();
nodeCollider.radius = nodeColliderRadius;
// 初始化节点位置
Vector3 startPos = transform.position;
for (int i = 0; i < totalNodes; i++)
{
currentNodePositions[i] = startPos;
previousNodePositions[i] = startPos;
startPos.y -= nodeDistance;
}
// 设置线渲染器
lineRenderer.startWidth = ropeWidth;
lineRenderer.endWidth = ropeWidth;
}
void Update()
{
// 处理鼠标输入
if (Input.GetMouseButtonDown(0))
{
if (!isStartLocked)
{
isStartLocked = true;
startLock = GetMouseWorldPosition();
}
else if (!isEndLocked)
{
isEndLocked = true;
endLock = GetMouseWorldPosition();
}
}
else if (!isStartLocked)
{
startLock = GetMouseWorldPosition();
}
else if (isStartLocked && !isEndLocked)
{
endLock = GetMouseWorldPosition();
}
DrawRope();
}
void FixedUpdate()
{
Simulate();
for (int i = 0; i < iterations; i++)
{
ApplyConstraint();
// 减少碰撞检测频率
if (i % (iterateCollisionsEvery + 1) == 0)
{
AdjustCollisions();
}
}
}
Vector3 GetMouseWorldPosition()
{
return cam.ScreenToWorldPoint(Input.mousePosition + new Vector3(0, 0, mouseOffset));
}
void Simulate()
{
float fixedDt = Time.fixedDeltaTime;
for (int i = 0; i < totalNodes; i++)
{
// 计算并应用速度
Vector3 velocity = (currentNodePositions[i] - previousNodePositions[i]) * velocityDampen;
previousNodePositions[i] = currentNodePositions[i];
currentNodePositions[i] += velocity + gravity * fixedDt;
}
}
void ApplyConstraint()
{
// 锁定端点
currentNodePositions[0] = startLock;
if (isStartLocked && isEndLocked)
{
currentNodePositions[totalNodes - 1] = endLock;
}
// 预计算所有常用值
float halfStiffness = 0.5f * stiffness;
float sqrNodeDistance = nodeDistance * nodeDistance;
int nodeCountMinusOne = totalNodes - 1;
for (int i = 0; i < nodeCountMinusOne; i++)
{
Vector3 node1 = currentNodePositions[i];
Vector3 node2 = currentNodePositions[i + 1];
Vector3 diff = node1 - node2;
float sqrDistance = diff.x * diff.x + diff.y * diff.y + diff.z * diff.z;
// 只有当距离差异超过一定阈值时才调整
if (Mathf.Abs(sqrDistance - sqrNodeDistance) > 0.001f)
{
float distance = Mathf.Sqrt(sqrDistance);
float difference = nodeDistance - distance;
Vector3 direction = diff / distance; // 比 normalized 更快
Vector3 adjustment = direction * (difference * halfStiffness);
currentNodePositions[i] += adjustment;
currentNodePositions[i + 1] -= adjustment;
}
}
}
void AdjustCollisions()
{
for (int i = 1; i < totalNodes; i += 2) // 跳过更多节点减少计算
{
int hits = Physics.OverlapSphereNonAlloc(
currentNodePositions[i],
nodeColliderRadius,
colliderHitBuffer,
~(1 << 8)); // 忽略特定层
for (int n = 0; n < hits; n++)
{
if (Physics.ComputePenetration(
nodeCollider,
currentNodePositions[i],
Quaternion.identity,
colliderHitBuffer[n],
colliderHitBuffer[n].transform.position,
colliderHitBuffer[n].transform.rotation,
out Vector3 direction,
out float distance))
{
currentNodePositions[i] += direction * distance;
}
}
}
}
void DrawRope()
{
// 直接使用currentNodePositions数组避免额外拷贝
lineRenderer.positionCount = totalNodes;
lineRenderer.SetPositions(currentNodePositions);
}
void OnDestroy()
{
if (nodeTester != null)
{
Destroy(nodeTester);
}
}
}
}

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Assets/Scripts/Common/FishingRope.cs.meta Normal file
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ProjectSettings/EditorBuildSettings.asset
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