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去掉obi，使用自写绳索

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BobSong
2026-02-23 20:51:03 +08:00
parent cb636f862d
commit 91e2309eeb
2011 changed files with 2593 additions and 190578 deletions
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140
Assets/Obi/Scripts/Common/Utils/ObiParticlePicker.cs
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using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
namespace Obi
{
public class ObiParticlePicker : MonoBehaviour
{
public class ParticlePickEventArgs : EventArgs
{
public int particleIndex;
public Vector3 worldPosition;
public ParticlePickEventArgs(int particleIndex, Vector3 worldPosition)
{
this.particleIndex = particleIndex;
this.worldPosition = worldPosition;
}
}
[Serializable]
public class ParticlePickUnityEvent : UnityEvent<ParticlePickEventArgs> { }
public ObiSolver solver;
public float radiusScale = 1;
public ParticlePickUnityEvent OnParticlePicked;
public ParticlePickUnityEvent OnParticleHeld;
public ParticlePickUnityEvent OnParticleDragged;
public ParticlePickUnityEvent OnParticleReleased;
private Vector3 lastMousePos = Vector3.zero;
private int pickedParticleIndex = -1;
private float pickedParticleDepth = 0;
void Awake()
{
lastMousePos = Input.mousePosition;
}
void LateUpdate()
{
if (solver != null)
{
// Click:
if (Input.GetMouseButtonDown(0))
{
pickedParticleIndex = -1;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
float closestMu = float.MaxValue;
float closestDistance = float.MaxValue;
Matrix4x4 solver2World = solver.transform.localToWorldMatrix;
// Find the closest particle hit by the ray:
for (int i = 0; i < solver.positions.count; ++i)
{
Vector3 worldPos = solver2World.MultiplyPoint3x4(solver.positions[i]);
float mu;
Vector3 projected = ObiUtils.ProjectPointLine(ray.origin, ray.origin + ray.direction, worldPos, out mu, false);
float distanceToRay = Vector3.SqrMagnitude(worldPos - projected);
// Disregard particles behind the camera:
mu = Mathf.Max(0, mu);
float radius = solver.principalRadii[i][0] * radiusScale;
if (distanceToRay <= radius * radius && distanceToRay < closestDistance && mu < closestMu)
{
closestMu = mu;
closestDistance = distanceToRay;
pickedParticleIndex = i;
}
}
if (pickedParticleIndex >= 0)
{
pickedParticleDepth = Camera.main.transform.InverseTransformVector(solver2World.MultiplyPoint3x4(solver.positions[pickedParticleIndex]) - Camera.main.transform.position).z;
if (OnParticlePicked != null)
{
Vector3 worldPosition = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, pickedParticleDepth));
OnParticlePicked.Invoke(new ParticlePickEventArgs(pickedParticleIndex, worldPosition));
}
}
}
else if (pickedParticleIndex >= 0)
{
// Drag:
Vector3 mouseDelta = Input.mousePosition - lastMousePos;
if (mouseDelta.magnitude > 0.01f && OnParticleDragged != null)
{
Vector3 worldPosition = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, pickedParticleDepth));
OnParticleDragged.Invoke(new ParticlePickEventArgs(pickedParticleIndex, worldPosition));
}
else if (OnParticleHeld != null)
{
Vector3 worldPosition = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, pickedParticleDepth));
OnParticleHeld.Invoke(new ParticlePickEventArgs(pickedParticleIndex, worldPosition));
}
// Release:
if (Input.GetMouseButtonUp(0))
{
if (OnParticleReleased != null)
{
Vector3 worldPosition = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, pickedParticleDepth));
OnParticleReleased.Invoke(new ParticlePickEventArgs(pickedParticleIndex, worldPosition));
}
pickedParticleIndex = -1;
}
}
}
lastMousePos = Input.mousePosition;
}
}
}