Legacy Documentation: Version 2018.1 (Go to current version)
LanguageEnglish
  • C#
  • JS

Script language

Select your preferred scripting language. All code snippets will be displayed in this language.

ParticleSystem.GetParticles

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

Switch to Manual
public method GetParticles(particles: Particle[]): int;
public int GetParticles(Particle[] particles);

Parameters

particlesOutput particle buffer, containing the current particle state.

Returns

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

Description

Gets the particles of this particle system.

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
@RequireComponent(ParticleSystem)
public class ParticleFlow extends MonoBehaviour {
	var m_System: ParticleSystem;
	var m_Particles: ParticleSystem.Particle[];
	public var m_Drift: float = 0.01f;
	private function LateUpdate() {
		InitializeIfNeeded();
		// GetParticles is allocation free because we reuse the m_Particles buffer between updates
		var numParticlesAlive: int = m_System.GetParticles(m_Particles);
		// Change only the particles that are alive
		for (var i: int = 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 = GetComponent.<ParticleSystem>();
		if (m_Particles == null || m_Particles.Length < m_System.main.maxParticles)
			m_Particles = new ParticleSystem.Particle[m_System.main.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.main.maxParticles) m_Particles = new ParticleSystem.Particle[m_System.main.maxParticles]; } }
对文档有任何疑问,请移步至开发者社区提问,我们将尽快为您解答