xi/Assets/VolumetricFog/Editor/FogVolumeExtensions.cs

using UnityEngine;
using UnityEditor;
using System.Collections;

namespace VolumetricFogAndMist {
	public class FogVolumeExtensions : MonoBehaviour {

		[MenuItem("GameObject/Create Other/Volumetric Fog Volume")]
		static void CreateFogVolume(MenuCommand menuCommand) {
			GameObject fogVolume = Resources.Load<GameObject>("Prefabs/FogVolume");
			if (fogVolume == null) {
				Debug.LogError("Could not load FogVolume from Resources/Prefabs folder!");
				return;
			}
			GameObject newFogVolume = Instantiate(fogVolume);
			newFogVolume.name = "Volumetric Fog Volume";

			// Ensure it gets reparented if this was a context click (otherwise does nothing)
			GameObjectUtility.SetParentAndAlign(newFogVolume, menuCommand.context as GameObject);

			// Break prefab link
			PrefabUtility.DisconnectPrefabInstance(newFogVolume);

			// Register root object for undo.
			Undo.RegisterCreatedObjectUndo(newFogVolume, "Create Volumetric Fog Volume");
			Selection.activeObject = newFogVolume;

			// Enables fog volumes in fog component
			VolumetricFog fog = Camera.main.GetComponent<VolumetricFog>();
			if (fog != null)
				fog.useFogVolumes = true;
		}

		[MenuItem("GameObject/Create Other/Volumetric Fog Area (Box)")]
		static void CreateFogAreaBox(MenuCommand menuCommand) {
			GameObject fogArea = Resources.Load<GameObject>("Prefabs/FogBoxArea");
			if (fogArea == null) {
				Debug.LogError("Could not load FogBoxArea from Resources/Prefabs folder!");
				return;
			}
			GameObject newFogArea = Instantiate(fogArea);
			newFogArea.name = "Volumetric Fog Area Box";

			// Ensure it gets reparented if this was a context click (otherwise does nothing)
			GameObjectUtility.SetParentAndAlign(newFogArea, menuCommand.context as GameObject);

			// Break prefab link
			PrefabUtility.DisconnectPrefabInstance(newFogArea);

			// Register root object for undo.
			Undo.RegisterCreatedObjectUndo(newFogArea, "Create Volumetric Fog Area (Box)");
			Selection.activeObject = newFogArea;
		}


		[MenuItem("GameObject/Create Other/Volumetric Fog Area (Spherical)")]
		static void CreateFogAreaSphere(MenuCommand menuCommand) {
			GameObject fogArea = Resources.Load<GameObject>("Prefabs/FogSphereArea");
			if (fogArea == null) {
				Debug.LogError("Could not load FogSphereArea from Resources/Prefabs folder!");
				return;
			}
			GameObject newFogArea = Instantiate(fogArea);
			newFogArea.name = "Volumetric Fog Area Sphere";

			// Ensure it gets reparented if this was a context click (otherwise does nothing)
			GameObjectUtility.SetParentAndAlign(newFogArea, menuCommand.context as GameObject);

			// Break prefab link
			PrefabUtility.DisconnectPrefabInstance(newFogArea);

			// Register root object for undo.
			Undo.RegisterCreatedObjectUndo(newFogArea, "Create Volumetric Fog Area (Sphere)");
			Selection.activeObject = newFogArea;
		}

		[MenuItem("GameObject/Create Other/Volumetric Fog Area (Spherical, 2 layers)")]
		static void CreateFogCloud2Layer(MenuCommand menuCommand) {
			GameObject fogArea = Resources.Load<GameObject>("Prefabs/FogSphereArea");
			if (fogArea == null) {
				Debug.LogError("Could not load FogSphereArea from Resources/Prefabs folder!");
				return;
			}

			GameObject root = new GameObject("Volumetric Fog Cloud Layers");
			Vector3 pos = Camera.main != null ? Camera.main.transform.position : Vector3.zero;
			pos.y += 70;
			root.transform.position = pos;
			VolumetricFog fog = InstantiateCloudLayer(fogArea, 1).GetComponent<VolumetricFog>();
			fog.transform.SetParent(root.transform, false);
			fog.transform.localScale = new Vector3(2000, 60f, 2000);
			fog.density = 1f;
			fog.height = 60f;
			fog.noiseStrength = 0.778f;
			fog.noiseScale = 4.37f;
			fog.noiseSparse = 0.418f;
			fog.noiseFinalMultiplier = 1f;
			fog.distance = 0;
			fog.distanceFallOff = 0f;

			fog = InstantiateCloudLayer(fogArea, 2).GetComponent<VolumetricFog>();
			fog.transform.SetParent(root.transform, false);
			fog.transform.localPosition += new Vector3(0, 50, 0);
			fog.transform.localScale = new Vector3(2000, 50, 2000);
			fog.density = 1f;
			fog.height = 50f;
			fog.noiseStrength = 1f;
			fog.noiseScale = 5.57f;
			fog.noiseSparse = 0.458f;
			fog.noiseFinalMultiplier = 1f;
			fog.distance = 0;
			fog.distanceFallOff = 0f;


			Selection.activeObject = root;
		}

		static GameObject InstantiateCloudLayer(GameObject fogArea, int layerIndex) {
			GameObject newFogArea = Instantiate(fogArea);
			newFogArea.name = "Volumetric Fog Area Layer " + layerIndex;

			// Break prefab link
			PrefabUtility.DisconnectPrefabInstance(newFogArea);
			return newFogArea;

		}



	}

}