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Question by Davinder_Singh · Apr 14, 2016 at 12:29 PM · particle system

Getting error - an object reference is required to access non-static member in c#...!!! Plz Help!!! Thanks in Advance...!!!

Getting error - an object reference is required to access non-static member 'UnityEngine.ParticleSystem.SetParticles(UnityEngine.ParticleSystem.Particle[],int)'

using UnityEngine; using System.Collections;

public class Grapher1 : MonoBehaviour {

 public int resolution = 10;
 private ParticleSystem.Particle[] points;


 // Use this for initialization
 void Start () 
 {
     ParticleSystem.SetParticles (points,points.Length);
     if (resolution < 10 || resolution > 100) 
     {
         Debug.LogWarning ("Grapher resolution out of bounds, resettled to minimum",this);
         resolution = 10;
     }
     points=new ParticleSystem.Particle[resolution];
     float increment = 1f / (resolution - 1);
     for (int i = 0; i < resolution; i++) {
         float x = i * increment;
         points[i].position = new Vector3(x, 0f, 0f);
         points[i].color = new Color(x, 0f, 0f);
         points[i].size = 0.1f;
     }
 }
 
 // Update is called once per frame
 void Update () 
 {
     
 }

}

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Answer by Landern · Apr 14, 2016 at 01:18 PM

First line in Start method, you're setting the particles with a null reference to points, points isn't instantiated until line 14 in your original post. Move your code around so that you're not calling set until points is initialized/instantiated.

Try adjusting the Start method like this:

 void Start () 
  {
      if (resolution < 10 || resolution > 100) 
      {
          Debug.LogWarning ("Grapher resolution out of bounds, resettled to minimum",this);
          resolution = 10;
      }
      points=new ParticleSystem.Particle[resolution]; // initialize
 
      ParticleSystem.SetParticles (points,points.Length); // then set
 
      float increment = 1f / (resolution - 1);
      for (int i = 0; i < resolution; i++) {
          float x = i * increment;
          points[i].position = new Vector3(x, 0f, 0f);
          points[i].color = new Color(x, 0f, 0f);
          points[i].size = 0.1f;
      }
  }
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