137 lines
5.3 KiB
C#
137 lines
5.3 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.Rendering;
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using UnityEngine.Rendering.Universal;
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using UnityEngine.XR;
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public class reflection : MonoBehaviour
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{
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public Camera _mainCamera;
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public Camera _reflectionCamera_L;
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public Camera _reflectionCamera_R;
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public Material matBur;
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public Transform _planner;
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private Material _palnnerMaterial;
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RenderTexture _reflectionRenderTexture_L;
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RenderTexture _reflectionRenderTexture_R;
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private int renderLeft=0;
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//private readonly int temp_L = Shader.PropertyToID("_reflectionRenderTexture_L");
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//private readonly int temp_R = Shader.PropertyToID("_reflectionRenderTexture_R");
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// Start is called before the first frame update
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void Start()
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{
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_reflectionCamera_L.CopyFrom(_mainCamera);
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_palnnerMaterial = _planner.GetComponent<MeshRenderer>().material;
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//创建相机并指定相机渲染目标
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_reflectionRenderTexture_L = new RenderTexture(Screen.width/4, Screen.height/4, 24);
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_reflectionCamera_L.targetTexture = _reflectionRenderTexture_L;
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_reflectionRenderTexture_R = new RenderTexture(Screen.width/4, Screen.height/4, 24);
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_reflectionCamera_R.CopyFrom(_mainCamera);
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_reflectionCamera_R.targetTexture = _reflectionRenderTexture_R;
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//将相机渲染的目标赋给材质
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_palnnerMaterial.SetTexture("_ReflectionTex_R",_reflectionRenderTexture_R);
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_palnnerMaterial.SetTexture("_ReflectionTex_L",_reflectionRenderTexture_L);
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//将相机渲染的目标赋给材质
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RenderPipelineManager.beginCameraRendering += OnBeginCameraRendering;
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}
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private void OnBeginCameraRendering(ScriptableRenderContext arg1, Camera arg2)
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{
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if(arg2!=_mainCamera) return;
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var leftEyeM = _mainCamera.GetStereoViewMatrix(Camera.StereoscopicEye.Left);
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var leftEyePM=_mainCamera.GetStereoProjectionMatrix(Camera.StereoscopicEye.Left);
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_reflectionCamera_L.worldToCameraMatrix =leftEyeM * CalculateReflectionCameraMatrix(Vector3.up, _planner.position);
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_reflectionCamera_L.projectionMatrix = leftEyePM;
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var rightEyeM = _mainCamera.GetStereoViewMatrix(Camera.StereoscopicEye.Right);
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var rightEyePM=_mainCamera.GetStereoProjectionMatrix(Camera.StereoscopicEye.Right);
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_reflectionCamera_R.worldToCameraMatrix =rightEyeM * CalculateReflectionCameraMatrix(Vector3.up, _planner.position);
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_reflectionCamera_R.projectionMatrix = rightEyePM;
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GL.invertCulling = true;//进行裁剪顺序的翻转
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_palnnerMaterial.SetFloat("_renderEye",renderLeft);
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CommandBuffer cmd = CommandBufferPool.Get("ReflectionBur");
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matBur.SetFloat("_BurStength",1f);
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if (renderLeft==0)
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{
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UniversalRenderPipeline.RenderSingleCamera(arg1, _reflectionCamera_L);//摄像机开始渲染
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cmd.Blit(_reflectionRenderTexture_L,_reflectionRenderTexture_R,matBur,0);
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cmd.Blit(_reflectionRenderTexture_R,_reflectionRenderTexture_L,matBur,0);
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arg1.ExecuteCommandBuffer(cmd);
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renderLeft = 1;
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}
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else
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{
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UniversalRenderPipeline.RenderSingleCamera(arg1, _reflectionCamera_R);
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cmd.Blit(_reflectionRenderTexture_R,_reflectionRenderTexture_L,matBur,0);
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cmd.Blit(_reflectionRenderTexture_L,_reflectionRenderTexture_R,matBur,0);
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arg1.ExecuteCommandBuffer(cmd);
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renderLeft = 0;
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}
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cmd.Release();
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GL.invertCulling = false;//进行裁剪顺序的翻转
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}
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//计算反射矩阵R
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private Matrix4x4 CalculateReflectionCameraMatrix(Vector3 N, Vector3 plane_position)//计算返回反射矩阵
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{
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//下面计算反射矩阵是在世界空间计算的
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Matrix4x4 Reflection_camera_M = Matrix4x4.identity;//初始化反射矩阵
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//d指的是平面到世界坐标原点的距离
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float d = -Vector3.Dot(plane_position, N);//d = -dot(P, N),P是平面上的任意一点，N是平面的法向量
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Reflection_camera_M.m00 = 1 - 2 * N.x * N.x;
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Reflection_camera_M.m01 = - 2 * N.x * N.y;
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Reflection_camera_M.m02 = - 2 * N.x * N.z;
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Reflection_camera_M.m03 = - 2 * N.x * d;
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Reflection_camera_M.m10 = - 2 * N.x * N.y;
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Reflection_camera_M.m11 = 1 - 2 * N.y * N.y;
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Reflection_camera_M.m12 = - 2 * N.y * N.z;
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Reflection_camera_M.m13 = - 2 * N.y * d;
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Reflection_camera_M.m20 = - 2 * N.x * N.z;
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Reflection_camera_M.m21 = - 2 * N.y * N.z;
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Reflection_camera_M.m22 = 1 - 2 * N.z * N.z;
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Reflection_camera_M.m23 = - 2 * N.z * d;
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Reflection_camera_M.m30 = 0;
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Reflection_camera_M.m31 = 0;
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Reflection_camera_M.m32 = 0;
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Reflection_camera_M.m33 = 1;
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return Reflection_camera_M;
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}
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private void OnDestroy()
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{
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RenderPipelineManager.beginCameraRendering -= OnBeginCameraRendering;
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_reflectionRenderTexture_L.Release();
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_reflectionRenderTexture_R.Release();
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_reflectionRenderTexture_L = null;
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_reflectionRenderTexture_R = null;
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}
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}
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