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Commit 1aaffc1e authored by Guerrero, Michael J's avatar Guerrero, Michael J

wip - planar reflection.

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using System.Collections;
using System.Collections.Generic;
using UnityEngine.Rendering;
using UnityEngine.Rendering.LWRP;
using UnityEngine;
public class PlanarReflection : MonoBehaviour
{
public Transform reflectionPlaneObject;
public Material reflectionMaterial;
Camera reflectionCamera;
RenderTexture reflectionTexture;
void Start()
{
reflectionTexture = new RenderTexture(Screen.width, Screen.height, 24);
reflectionMaterial.SetTexture("_reflectionTexture", reflectionTexture);
reflectionCamera = gameObject.AddComponent<Camera>();
RenderPipelineManager.beginCameraRendering += OnBeginRendering;
}
void OnBeginRendering(ScriptableRenderContext context, Camera camera)
{
if (camera.tag == "MainCamera")
{
reflectionCamera.CopyFrom(camera);
reflectionCamera.depth -= 1;
reflectionCamera.targetTexture = reflectionTexture;
Vector3 cameraForwardWorld = camera.transform.forward;
Vector3 cameraUpWorld = camera.transform.up;
Vector3 cameraPosWorld = camera.transform.position;
Vector3 cameraForwardPlane = reflectionPlaneObject.InverseTransformDirection(cameraForwardWorld);
Vector3 cameraUpPlane = reflectionPlaneObject.InverseTransformDirection(cameraUpWorld);
Vector3 cameraPosPlane = reflectionPlaneObject.InverseTransformDirection(cameraPosWorld);
cameraForwardPlane.y *= -1f;
cameraUpPlane.y *= -1f;
cameraPosPlane.y *= -1f;
cameraForwardWorld = reflectionPlaneObject.TransformDirection(cameraForwardWorld);
cameraUpWorld = reflectionPlaneObject.TransformDirection(cameraUpWorld);
cameraPosWorld = reflectionPlaneObject.TransformDirection(cameraPosWorld);
reflectionCamera.transform.position = cameraPosWorld;
reflectionCamera.transform.LookAt(cameraPosWorld + cameraForwardWorld, cameraPosWorld);
}
}
}
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