using UnityEngine;

namespace Artngame.SKYMASTER
{
	[ExecuteInEditMode]
	public class TerrainDepthSM : MonoBehaviour
	{
		[Range(0f, 15f)]
		public float heightFactor = 0.5f;

		[Range(0f, 1.1f)]
		public float heightCutoff = 0.1f;

		[Range(0.01f, 1.15f)]
		public float contrast = 0.1f;

		public Shader DepthShader;

		private Material material;

		private void Start()
		{
			if (DepthShader == null)
			{
				DepthShader = Shader.Find("SkyMaster/TerrainDepthSM");
			}
			if (material == null)
			{
				material = new Material(DepthShader);
				material.hideFlags = HideFlags.HideAndDontSave;
			}
			GetComponent<Camera>().depthTextureMode = DepthTextureMode.Depth;
			if (!DepthShader.isSupported || DepthShader == null)
			{
				base.enabled = false;
				Debug.Log("DepthShader " + DepthShader.name + " not available");
			}
		}

		private void OnDisable()
		{
			if (material != null)
			{
				Object.DestroyImmediate(material);
			}
		}

		private void OnRenderImage(RenderTexture source, RenderTexture destination)
		{
			if (material == null)
			{
				material = new Material(DepthShader);
				material.hideFlags = HideFlags.HideAndDontSave;
			}
			if (DepthShader != null)
			{
				material.SetFloat("_heightFactor", heightFactor);
				material.SetFloat("_heightCutoff", heightCutoff);
				material.SetFloat("_contrast", contrast);
				Graphics.Blit(source, destination, material);
			}
			else
			{
				Graphics.Blit(source, destination);
			}
		}
	}
}