ParticleSystem.GetParticles

Параметры

Возврат значений

int The number of particles written to the input particle array (the number of particles currently alive).

Описание

Удалить все частицы в системе частиц.

This method is allocation free as long the input "particles" array is preallocated once (see example below). Note that only a small part of the particles array might be used as this depends on how many particles are currently alive in the particle system when calling GetParticles().

See Also: Particle, SetParticles.

#pragma strict

@script RequireComponent(ParticleSystem)

var m_System : ParticleSystem;
var m_Particles : ParticleSystem.Particle[];
public var m_Drift = 0.01f;

function LateUpdate() {

	InitializeIfNeeded();
	
	// GetParticles is allocation free because we reuse the m_Particles buffer between updates
	var numParticlesAlive = m_System.GetParticles(m_Particles);
	
	// Change only the particles that are alive
	for (var i = 0; i < numParticlesAlive; i++) {
		m_Particles[i].velocity += Vector3.up * m_Drift;
	}
	// Apply the particle changes to the particle system
	m_System.SetParticles(m_Particles, numParticlesAlive);
}

function InitializeIfNeeded() {
	if (m_System == null)
		m_System = this.GetComponent.<ParticleSystem>();
		
	if (m_Particles == null || m_Particles.Length < m_System.maxParticles)
		m_Particles = new ParticleSystem.Particle[m_System.maxParticles];
}

using UnityEngine;

[RequireComponent(typeof(ParticleSystem))]
public class ParticleFlow : MonoBehaviour
{
	ParticleSystem m_System;
	ParticleSystem.Particle[] m_Particles;
	public float m_Drift = 0.01f;

	private void LateUpdate()
	{
		InitializeIfNeeded();

		// GetParticles is allocation free because we reuse the m_Particles buffer between updates
		int numParticlesAlive = m_System.GetParticles(m_Particles);

		// Change only the particles that are alive
		for (int i = 0; i < numParticlesAlive; i++)
		{
			m_Particles[i].velocity += Vector3.up * m_Drift;
		}

		// Apply the particle changes to the particle system
		m_System.SetParticles(m_Particles, numParticlesAlive);
	}

	void InitializeIfNeeded()
	{
		if (m_System == null)
			m_System = GetComponent<ParticleSystem>();

		if (m_Particles == null || m_Particles.Length < m_System.maxParticles)
			m_Particles = new ParticleSystem.Particle[m_System.maxParticles]; 
	}
}