using System;
using UnityEngine;

namespace LOS
{
	// Token: 0x02000100 RID: 256
	[RequireComponent(typeof(Camera))]
	public class AttackShapes : MonoBehaviour
	{
		// Token: 0x1700001C RID: 28
		// (get) Token: 0x060015BD RID: 5565 RVA: 0x0019BC9A File Offset: 0x00199E9A
		public static Plane[] CameraFrustumPlanes
		{
			get
			{
				return AttackShapes.m_CameraFrustumPlanes;
			}
		}

		// Token: 0x060015BE RID: 5566 RVA: 0x0019BCA1 File Offset: 0x00199EA1
		private void Awake()
		{
			this.m_Camera = base.GetComponent<Camera>();
			this.CreateTextures();
		}

		// Token: 0x060015BF RID: 5567 RVA: 0x0019BCB5 File Offset: 0x00199EB5
		private void OnEnable()
		{
			LOSHelper.ExtractFrustumPlanes(AttackShapes.m_CameraFrustumPlanes, this.m_Camera);
		}

		// Token: 0x060015C0 RID: 5568 RVA: 0x0019BCC8 File Offset: 0x00199EC8
		private void CreateTextures()
		{
			if (this.textures.Length > 1 && this.textures[1] != null)
			{
				this.textures[1].Release();
			}
			if (this.textures[0] != null)
			{
				this.textures[0].Release();
			}
			this.textures = new RenderTexture[2];
			bool flag = false;
			RenderTexture renderTexture = new RenderTexture(this.texSize, this.texSize, 16, RenderTextureFormat.RGHalf);
			renderTexture.name = "rt0";
			this.textures[0] = renderTexture;
			renderTexture.useMipMap = flag;
			renderTexture.filterMode = FilterMode.Trilinear;
			RenderTexture renderTexture2 = new RenderTexture(this.texSize, this.texSize, 16, RenderTextureFormat.RGHalf);
			renderTexture.name = "rt1";
			this.textures[1] = renderTexture2;
			renderTexture2.useMipMap = flag;
			renderTexture2.filterMode = FilterMode.Trilinear;
		}

		// Token: 0x060015C1 RID: 5569 RVA: 0x0019BD98 File Offset: 0x00199F98
		private void OnDisable()
		{
		}

		// Token: 0x060015C2 RID: 5570 RVA: 0x0019BD9C File Offset: 0x00199F9C
		private void OnPreRender()
		{
			if (this.m_Camera == null)
			{
				return;
			}
			if (this.textures[0] == null)
			{
				this.CreateTextures();
			}
			if (base.transform.hasChanged)
			{
				LOSHelper.ExtractFrustumPlanes(AttackShapes.m_CameraFrustumPlanes, this.m_Camera);
				base.transform.hasChanged = false;
			}
		}

		// Token: 0x060015C3 RID: 5571 RVA: 0x0019BDF8 File Offset: 0x00199FF8
		[ImageEffectOpaque]
		private void OnRenderImage(RenderTexture source, RenderTexture destination)
		{
			if (!this.m_Camera)
			{
				return;
			}
			Matrix4x4 matrix4x;
			Matrix4x4 matrix4x2;
			LOSHelper.CalculateViewVectors(this.m_Camera, out matrix4x, out matrix4x2);
			Materials.Mask.SetMatrix(ShaderID.FrustumRays, matrix4x);
			Materials.Mask.SetMatrix(ShaderID.FrustumOrigins, matrix4x2);
			Materials.Mask.SetMatrix(ShaderID.WorldToCameraMatrix, this.m_Camera.worldToCameraMatrix);
			Material skybox = RenderSettings.skybox;
			RenderSettings.skybox = Materials.SkyBox;
			this.RenderSourceToMask(this.caster, 0, this.caster.gameObject.transform.position);
			if (this.cameraNumber > 1f)
			{
				this.RenderSourceToMask(this.caster2, 1, this.caster2.gameObject.transform.position);
			}
			RenderSettings.skybox = skybox;
			if (!this.combineMaterial)
			{
				this.combineMaterial = new Material(this.coneShader);
			}
			if (this.caster)
			{
				this.combineMaterial.SetFloat("cameraLengthConeAttack", this.caster.SourceCamera.farClipPlane);
				this.combineMaterial.SetFloat("minVarianceConeAttack", this.caster.MinVariance);
				this.combineMaterial.SetFloat("backfaceFadeAttack", this.caster.BackfacesFade);
				this.combineMaterial.SetFloat("sphereRadius", this.sphereRadius);
				this.combineMaterial.SetFloat("cameraNumber", this.cameraNumber);
			}
			Graphics.Blit(source, destination, this.combineMaterial, 0);
		}

		// Token: 0x060015C4 RID: 5572 RVA: 0x0019BF80 File Offset: 0x0019A180
		private void RenderSourceToMask(LOSSource losSource, int num, Vector3 center)
		{
			Camera sourceCamera = losSource.SourceCamera;
			Materials.SkyBox.SetVector(ShaderID.FarPlane, new Vector4(sourceCamera.farClipPlane, sourceCamera.farClipPlane, sourceCamera.farClipPlane, sourceCamera.farClipPlane));
			sourceCamera.targetTexture = this.textures[num];
			sourceCamera.RenderWithShader(Shaders.DepthCone, null);
			if (num == 0)
			{
				Shader.SetGlobalVector("_SourcePosConeAttack", center);
				Shader.SetGlobalVector("_LosPosConeAttack", losSource.gameObject.transform.position + losSource.gameObject.transform.forward);
				Shader.SetGlobalMatrix("_SourceWorldProjConeAttack", sourceCamera.projectionMatrix * sourceCamera.worldToCameraMatrix);
				Shader.SetGlobalMatrix("_Source_CamToWorldConeAttack", sourceCamera.cameraToWorldMatrix);
				Shader.SetGlobalTexture("_SourceDepthTexConeAttack", this.textures[num]);
				return;
			}
			Shader.SetGlobalVector("_SourcePosConeAttack1", center);
			Shader.SetGlobalVector("_LosPosConeAttack1", losSource.gameObject.transform.position + losSource.gameObject.transform.forward);
			Shader.SetGlobalMatrix("_SourceWorldProjConeAttack1", sourceCamera.projectionMatrix * sourceCamera.worldToCameraMatrix);
			Shader.SetGlobalTexture("_SourceDepthTexConeAttack1", this.textures[num]);
		}

		// Token: 0x04002600 RID: 9728
		public int texSize = 1024;

		// Token: 0x04002601 RID: 9729
		public static Plane[] m_CameraFrustumPlanes = new Plane[6];

		// Token: 0x04002602 RID: 9730
		public LOSSource caster;

		// Token: 0x04002603 RID: 9731
		public LOSSource caster2;

		// Token: 0x04002604 RID: 9732
		private Camera m_Camera;

		// Token: 0x04002605 RID: 9733
		public RenderTexture[] textures = new RenderTexture[1];

		// Token: 0x04002606 RID: 9734
		private Material combineMaterial;

		// Token: 0x04002607 RID: 9735
		public float sphereRadius;

		// Token: 0x04002608 RID: 9736
		public float cameraNumber = 1f;

		// Token: 0x04002609 RID: 9737
		public Shader coneShader;
	}
}
