mirror of
https://github.com/RHeavenStudioPlus/HeavenStudioPlus.git
synced 2024-11-10 11:45:09 +00:00
106 lines
3 KiB
C#
106 lines
3 KiB
C#
|
using System.Collections.Generic;
|
|||
|
|
using UnityEngine;
|
|||
|
|
|
|||
|
|
namespace BezierSolution
|
|||
|
|
{
|
|||
|
|
[AddComponentMenu( "Bezier Solution/Particles Follow Bezier" )]
|
|||
|
|
[HelpURL( "https://github.com/yasirkula/UnityBezierSolution" )]
|
|||
|
|
[RequireComponent( typeof( ParticleSystem ) )]
|
|||
|
|
[ExecuteInEditMode]
|
|||
|
|
public class ParticlesFollowBezier : MonoBehaviour
|
|||
|
|
{
|
|||
|
|
private const int MAX_PARTICLE_COUNT = 25000;
|
|||
|
|
|
|||
|
|
public enum FollowMode { Relaxed, Strict };
|
|||
|
|
|
|||
|
|
public BezierSpline spline;
|
|||
|
|
public FollowMode followMode = FollowMode.Relaxed;
|
|||
|
|
|
|||
|
|
private Transform cachedTransform;
|
|||
|
|
private ParticleSystem cachedPS;
|
|||
|
|
private ParticleSystem.MainModule cachedMainModule;
|
|||
|
|
|
|||
|
|
private ParticleSystem.Particle[] particles;
|
|||
|
|
private List<Vector4> particleData;
|
|||
|
|
|
|||
|
|
private void Awake()
|
|||
|
|
{
|
|||
|
|
cachedTransform = transform;
|
|||
|
|
cachedPS = GetComponent<ParticleSystem>();
|
|||
|
|
|
|||
|
|
cachedMainModule = cachedPS.main;
|
|||
|
|
particles = new ParticleSystem.Particle[cachedMainModule.maxParticles];
|
|||
|
|
|
|||
|
|
if( followMode == FollowMode.Relaxed )
|
|||
|
|
particleData = new List<Vector4>( particles.Length );
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#if UNITY_EDITOR
|
|||
|
|
private void OnEnable()
|
|||
|
|
{
|
|||
|
|
Awake();
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
#if UNITY_EDITOR
|
|||
|
|
private void LateUpdate()
|
|||
|
|
{
|
|||
|
|
if( !UnityEditor.EditorApplication.isPlaying )
|
|||
|
|
FixedUpdate();
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
private void FixedUpdate()
|
|||
|
|
{
|
|||
|
|
if( spline == null || cachedPS == null )
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
if( particles.Length < cachedMainModule.maxParticles && particles.Length < MAX_PARTICLE_COUNT )
|
|||
|
|
System.Array.Resize( ref particles, Mathf.Min( cachedMainModule.maxParticles, MAX_PARTICLE_COUNT ) );
|
|||
|
|
|
|||
|
|
bool isLocalSpace = cachedMainModule.simulationSpace != ParticleSystemSimulationSpace.World;
|
|||
|
|
int aliveParticles = cachedPS.GetParticles( particles );
|
|||
|
|
|
|||
|
|
Vector3 initialPoint = spline.GetPoint( 0f );
|
|||
|
|
if( followMode == FollowMode.Relaxed )
|
|||
|
|
{
|
|||
|
|
if( particleData == null )
|
|||
|
|
particleData = new List<Vector4>( particles.Length );
|
|||
|
|
|
|||
|
|
cachedPS.GetCustomParticleData( particleData, ParticleSystemCustomData.Custom1 );
|
|||
|
|
|
|||
|
|
// Credit: https://forum.unity3d.com/threads/access-to-the-particle-system-lifecycle-events.328918/#post-2295977
|
|||
|
|
for( int i = 0; i < aliveParticles; i++ )
|
|||
|
|
{
|
|||
|
|
Vector4 particleDat = particleData[i];
|
|||
|
|
Vector3 point = spline.GetPoint( 1f - ( particles[i].remainingLifetime / particles[i].startLifetime ) );
|
|||
|
|
if( !isLocalSpace )
|
|||
|
|
point = cachedTransform.TransformPoint( point - initialPoint );
|
|||
|
|
|
|||
|
|
// Move particles alongside the spline
|
|||
|
|
if( particleDat.w != 0f )
|
|||
|
|
particles[i].position += point - (Vector3) particleDat;
|
|||
|
|
|
|||
|
|
particleDat = point;
|
|||
|
|
particleDat.w = 1f;
|
|||
|
|
particleData[i] = particleDat;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
cachedPS.SetCustomParticleData( particleData, ParticleSystemCustomData.Custom1 );
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
for( int i = 0; i < aliveParticles; i++ )
|
|||
|
|
{
|
|||
|
|
Vector3 point = spline.GetPoint( 1f - ( particles[i].remainingLifetime / particles[i].startLifetime ) ) - initialPoint;
|
|||
|
|
if( !isLocalSpace )
|
|||
|
|
point = cachedTransform.TransformPoint( point );
|
|||
|
|
|
|||
|
|
particles[i].position = point;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
cachedPS.SetParticles( particles, aliveParticles );
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|