using UnityEngine;
using System.Collections;

public class WorldFadeFog : MonoBehaviour {

	public Color32 fogColour;
	public float fadeStart = 10f;
	public float fadeEnd = 1000f;

	public float transitionTime = 4.0f;




	public IEnumerator Trigger () {

		float t = 0;
		Color startFog = RenderSettings.fogColor;
		float startFogStart = RenderSettings.fogStartDistance;
		float startFogEnd = RenderSettings.fogEndDistance;

		while (t < transitionTime) {

			// color
			RenderSettings.fogColor = new Color(Mathf.Lerp(startFog.r, fogColour.r/255.0f, t / transitionTime),
			                                    Mathf.Lerp(startFog.g, fogColour.g/255.0f, t / transitionTime),
			                                    Mathf.Lerp(startFog.b, fogColour.b/255.0f, t / transitionTime));

			// fog start and end
			RenderSettings.fogStartDistance = Mathf.Lerp(startFogStart, fadeStart, t / transitionTime);
			RenderSettings.fogEndDistance = Mathf.Lerp(startFogEnd, fadeEnd, t / transitionTime);

			t += Time.deltaTime;
			Debug.Log(t / transitionTime);


			yield return null;
		}
	}
}