ParticleSystem.TrailModule.colorOverLifetime

Description

The gradient controlling the trail colors during the lifetime of the attached particle.

See Also: MinMaxGradient.

no example available in JavaScript

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {

	private ParticleSystem ps;
	private Gradient gradient = new Gradient();
	public bool swapColors = true;

	void Start() {
		ps = GetComponent<ParticleSystem>();

		var main = ps.main;
		main.startSize = 0.1f;
		main.startLifetime = 1.5f;

		var trails = ps.trails;
		trails.enabled = true;

		var psr = GetComponent<ParticleSystemRenderer>();
		psr.trailMaterial = new Material(Shader.Find("Sprites/Default"));
	}

	void Update() {
		var trails = ps.trails;
		if (swapColors)
		{
			gradient.SetKeys(
				new GradientColorKey[] { new GradientColorKey(Color.blue, 0.0f), new GradientColorKey(Color.green, 1.0f) },
				new GradientAlphaKey[] { new GradientAlphaKey(1.0f, 0.0f), new GradientAlphaKey(1.0f, 1.0f) }
				);
		}
		else
		{
			gradient.SetKeys(
				new GradientColorKey[] { new GradientColorKey(Color.green, 0.0f), new GradientColorKey(Color.blue, 1.0f) },
				new GradientAlphaKey[] { new GradientAlphaKey(1.0f, 0.0f), new GradientAlphaKey(1.0f, 1.0f) }
				);
		}

		trails.colorOverLifetime = gradient;
	}

	void OnGUI() {
		swapColors = GUI.Toggle(new Rect(25, 25, 200, 30), swapColors, "Swap Trail Colors");
	}
}