69 lines
2.3 KiB
C#
69 lines
2.3 KiB
C#
using System;
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using UnityEngine;
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[ExecuteInEditMode]
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[RequireComponent(typeof(Camera))]
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[AddComponentMenu("azure[Sky]/Extra/Skybox Fog Effect")]
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public class SkyboxFog : MonoBehaviour
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{
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public Material fogMaterial;
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private void OnRenderImage(RenderTexture source, RenderTexture destination)
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{
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GetComponent<Camera>().depthTextureMode |= DepthTextureMode.Depth;
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if (fogMaterial == null)
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{
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Graphics.Blit(source, destination);
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return;
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}
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Camera component = GetComponent<Camera>();
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float nearClipPlane = component.nearClipPlane;
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float farClipPlane = component.farClipPlane;
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float fieldOfView = component.fieldOfView;
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float aspect = component.aspect;
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Matrix4x4 identity = Matrix4x4.identity;
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float num = fieldOfView * 0.5f;
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Vector3 vector = GetComponent<Camera>().transform.right * nearClipPlane * Mathf.Tan(num * ((float)Math.PI / 180f)) * aspect;
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Vector3 vector2 = GetComponent<Camera>().transform.up * nearClipPlane * Mathf.Tan(num * ((float)Math.PI / 180f));
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Vector3 vector3 = GetComponent<Camera>().transform.forward * nearClipPlane - vector + vector2;
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float num2 = vector3.magnitude * farClipPlane / nearClipPlane;
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vector3.Normalize();
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vector3 *= num2;
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Vector3 vector4 = component.transform.forward * nearClipPlane + vector + vector2;
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vector4.Normalize();
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vector4 *= num2;
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Vector3 vector5 = component.transform.forward * nearClipPlane + vector - vector2;
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vector5.Normalize();
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vector5 *= num2;
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Vector3 vector6 = component.transform.forward * nearClipPlane - vector - vector2;
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vector6.Normalize();
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vector6 *= num2;
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identity.SetRow(0, vector3);
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identity.SetRow(1, vector4);
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identity.SetRow(2, vector5);
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identity.SetRow(3, vector6);
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fogMaterial.SetMatrix("_FrustumCorners", identity);
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CustomGraphicsBlit(source, destination, fogMaterial, 0);
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}
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private static void CustomGraphicsBlit(RenderTexture source, RenderTexture dest, Material fxMaterial, int passNr)
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{
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RenderTexture.active = dest;
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fxMaterial.SetTexture("_MainTex", source);
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GL.PushMatrix();
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GL.LoadOrtho();
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fxMaterial.SetPass(passNr);
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GL.Begin(7);
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GL.MultiTexCoord2(0, 0f, 0f);
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GL.Vertex3(0f, 0f, 3f);
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GL.MultiTexCoord2(0, 1f, 0f);
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GL.Vertex3(1f, 0f, 2f);
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GL.MultiTexCoord2(0, 1f, 1f);
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GL.Vertex3(1f, 1f, 1f);
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GL.MultiTexCoord2(0, 0f, 1f);
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GL.Vertex3(0f, 1f, 0f);
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GL.End();
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GL.PopMatrix();
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}
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}
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