using System.Collections;
using System.Collections.Generic;
using UnityEngine;

// Base class for data star rendering implementations.
public abstract class BaseStarDataRenderer : System.Object {
  public delegate void StarDataProgress(BaseStarDataRenderer renderer, float progress);
  public delegate void StarDataComplete(BaseStarDataRenderer renderer, Texture2D texture, bool success);

  public event StarDataProgress progressCallback;
  public event StarDataComplete completionCallback;

  public float density;
  public float imageSize;
  public string layerId;
  public float maxRadius;

  protected float sphereRadius = 1.0f;
  protected bool isCancelled;

  // This is a coroutine so we don't block the main editor thread.
  public abstract IEnumerator ComputeStarData();

  public virtual void Cancel()
  {
    progressCallback = null;
    completionCallback = null;
  }

  protected void SendProgress(float progress)
  {
    if (progressCallback != null) {
      progressCallback(this, progress);
    }
  }

  protected void SendCompletion(Texture2D texture, bool success)
  {
    if (completionCallback != null) {
      completionCallback(this, texture, success);
    }
  }
}