问题描述
我敢肯定，每个人都知道这个http://wiki.unity3d.com/index.php/Floating_Origin脚本，可以轻松解决浮点源问题。
我试图重写它，但是我似乎无法像上一个一样创建一个数组来存储所有粒子，因此我无法从那里继续。
这是我的代码：
// Based on the Unity Wiki FloatingOrigin script by Peter Stirling
// URL: http://wiki.unity3d.com/index.PHP/Floating_Origin
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.VFX;
using UnityEngine.Experimental.VFX;
public class FloatingOrigin : MonoBehavIoUr
{
[Tooltip("Point of reference from which to check the distance to origin.")]
public Transform ReferenceObject = null;
[Tooltip("distance from the origin the reference object must be in order to trigger an origin shift.")]
public float Threshold = 5000f;
[Header("Options")]
[Tooltip("When true,origin shifts are considered only from the horizontal distance to orign.")]
public bool Use2Ddistance = false;
[Tooltip("When true,updates ALL open scenes. When false,updates only the active scene.")]
public bool UpdateallScenes = true;
[Tooltip("Should ParticleSystems be moved with an origin shift.")]
public bool UpdateParticles = true;
[Tooltip("Should TrailRenderers be moved with an origin shift.")]
public bool UpdateTrailRenderers = true;
[Tooltip("Should LineRenderers be moved with an origin shift.")]
public bool UpdateLineRenderers = true;
private ParticleSystem.Particle[] parts = null;
VisualEffect[] visualEffect = null;
void LateUpdate()
{
if (ReferenceObject == null)
return;
Vector3 referencePosition = ReferenceObject.position;
if (Use2Ddistance)
referencePosition.y = 0f;
if (referencePosition.magnitude > Threshold)
{
MoveRoottransforms(referencePosition);
if (UpdateParticles)
MoveParticles(referencePosition);
if (UpdateTrailRenderers)
MoveTrailRenderers(referencePosition);
if (UpdateLineRenderers)
MoveLineRenderers(referencePosition);
}
}
private void MoveRoottransforms(Vector3 offset)
{
if (UpdateallScenes)
{
for (int z = 0; z < SceneManager.sceneCount; z++)
{
foreach (GameObject g in SceneManager.GetSceneAt(z).GetRootGameObjects())
g.transform.position -= offset;
}
}
else
{
foreach (GameObject g in SceneManager.GetActiveScene().GetRootGameObjects())
g.transform.position -= offset;
}
}
private void MoveTrailRenderers(Vector3 offset)
{
var trails = FindobjectsOfType<TrailRenderer>() as TrailRenderer[];
foreach (var trail in trails)
{
Vector3[] positions = new Vector3[trail.positionCount];
int positionCount = trail.GetPositions(positions);
for (int i = 0; i < positionCount; ++i)
positions[i] -= offset;
trail.SetPositions(positions);
}
}
private void MoveLineRenderers(Vector3 offset)
{
var lines = FindobjectsOfType<LineRenderer>() as LineRenderer[];
foreach (var line in lines)
{
Vector3[] positions = new Vector3[line.positionCount];
int positionCount = line.GetPositions(positions);
for (int i = 0; i < positionCount; ++i)
positions[i] -= offset;
line.SetPositions(positions);
}
}
private void MoveParticles(Vector3 offset)
{
var particles = FindobjectsOfType<ParticleSystem>() as ParticleSystem[];
foreach (ParticleSystem system in particles)
{
if (system.main.simulationSpace != ParticleSystemSimulationSpace.World)
continue;
int particlesNeeded = system.main.maxParticles;
if (particlesNeeded <= 0)
continue;
bool waspaused = system.isPaused;
bool wasplaying = system.isPlaying;
if (!waspaused)
system.Pause();
// ensure a sufficiently large array in which to store the particles
if (parts == null || parts.Length < particlesNeeded)
{
parts = new ParticleSystem.Particle[particlesNeeded];
}
// Now get the particles
int num = system.GetParticles(parts);
for (int i = 0; i < num; i++)
{
parts[i].position -= offset;
}
system.SetParticles(parts,num);
if (wasplaying)
system.Play();
}
var particles2 = FindobjectsOfType<VisualEffect>() as VisualEffect[];
foreach (VisualEffect system in particles2)
{
int particlesNeeded = system.aliveParticleCount;
if (particlesNeeded <= 0)
continue;
bool waspaused = !system.isActiveAndEnabled;
bool wasplaying = system.isActiveAndEnabled;
if (!waspaused)
system.Stop();
// ensure a sufficiently large array in which to store the particles
if (visualEffect == null || visualEffect.Length < particlesNeeded)
{
visualEffect = new VisualEffect().visualEffectAsset[particlesNeeded];
}
// Now get the particles
int num = system.GetParticles(parts);
for (int i = 0; i < num; i++)
{
parts[i].position -= offset;
}
system.SetParticles(parts,num);
if (wasplaying)
system.Play();
}
}
}
visualEffect = new VisualEffect().visualEffectAsset[particlesNeeded];
，我需要创建与该行相似的数组（正确的数组，但对于旧的粒子系统）
parts = new ParticleSystem.Particle[particlesNeeded];
创建充满粒子的数组（但使用VisualEffect类）。
如果我能解决这个问题，其余的应该没有任何问题。 我认为解决这个问题将在实际上和将来为成千上万的人带来帮助，因为统一中浮动原点的限制非常可怕，并且大多数从事统一中工作的人将需要具有VFX图形粒子的浮动原点用于他们的游戏世界。 >
感谢您的帮助。