deltavr multiplayer 2.0

Assets/_PROJECT/Components/Portals/Portal.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using Unity.XR.CoreUtils;
+using UnityEngine;
+using UnityEngine.XR;
+
+public class Portal : MonoBehaviour
+{
+    public bool allowRender;
+	private bool _canRender;
+    private bool _shouldRender = true;
+    
+    public Portal targetPortal;
+    public Transform normalVisible;
+    public Transform normalInvisible;
+    
+    public Camera portalLCamera;
+    public Camera portalRCamera;
+
+    public Renderer viewThroughRenderer;
+
+    private RenderTexture _viewThroughRenderTextureL;
+    private RenderTexture _viewThroughRenderTextureR;
+
+    private Material _viewThroughMaterial;
+
+    private Camera _mainCamera;
+    private Vector4 _vectorPlane;
+    
+    public bool _shouldTeleport;
+
+    private bool ShouldRender(Plane[] cameraPlanes) =>
+        viewThroughRenderer.isVisible &&
+        GeometryUtility.TestPlanesAABB(cameraPlanes,
+            viewThroughRenderer.bounds);
+
+    private void Start()
+    {
+        // Generate bounding plane
+        var plane = new Plane(normalVisible.forward, transform.position + normalVisible.forward * -0.01f);
+        _vectorPlane = new Vector4(plane.normal.x, plane.normal.y, plane.normal.z, plane.distance);
+        
+        if (allowRender)
+        {
+            float scaleX = transform.localScale.x;
+            float scaleY = transform.localScale.y;
+
+            // Create render texture
+            _viewThroughRenderTextureL =
+                new RenderTexture((1440), (1600), 24);
+            _viewThroughRenderTextureL.Create();
+
+            _viewThroughRenderTextureR =
+                new RenderTexture((1440), (1600), 24);
+            _viewThroughRenderTextureR.Create();
+            
+
+            // Assign render texture to portal camera
+            portalLCamera.targetTexture = _viewThroughRenderTextureL;
+            portalRCamera.targetTexture = _viewThroughRenderTextureR;
+
+            // Assign render texture to portal material (cloned)
+            _viewThroughMaterial = viewThroughRenderer.material;
+            _viewThroughMaterial.SetTexture("_TexL", _viewThroughRenderTextureL);
+            _viewThroughMaterial.SetTexture("_TexR", _viewThroughRenderTextureR);
+
+            // Cache the main camera
+            _mainCamera = Camera.main;
+
+            Application.onBeforeRender += OnBeforeRender;
+            _shouldTeleport = true;
+            _canRender = true;
+        }
+        else
+        {
+            portalLCamera.gameObject.SetActive(false);
+            portalRCamera.gameObject.SetActive(false);
+            viewThroughRenderer.enabled = false;
+        }
+    }
+    
+    private void OnBeforeRender()
+    {
+        if (!_canRender) return;
+        var cameraPlanes = GeometryUtility.CalculateFrustumPlanes(_mainCamera);
+        if (!ShouldRender(cameraPlanes))
+        {
+            if (!_shouldRender) return;
+            Debug.Log("Disabling render for " + transform.name);
+            viewThroughRenderer.material = new Material(Shader.Find("Unlit/Color"));
+            portalLCamera.enabled = false;
+            portalRCamera.enabled = false;
+            _shouldRender = false;
+            return;
+        }
+
+        if (!_shouldRender)
+        {
+            Debug.Log("Enabling render for " + transform.name);
+            viewThroughRenderer.material = _viewThroughMaterial;
+            portalLCamera.enabled = true;
+            portalRCamera.enabled = true;
+            _shouldRender = true;
+        }
+
+        UpdateCamera(portalLCamera, XRNode.LeftEye);
+        UpdateCamera(portalRCamera, XRNode.RightEye);
+    }
+
+    private void UpdateCamera(Camera portalCamera, XRNode eye)
+    {
+        // Calculate portal camera position and rotation
+        var virtualPosition = TransformPositionBetweenPortals(this, targetPortal, GetEyeWorldPosition(eye));
+        var virtualRotation = TransformRotationBetweenPortals(this, targetPortal, GetEyeRotation(eye));
+
+        // Position camera
+        portalCamera.transform.SetPositionAndRotation(virtualPosition, virtualRotation);
+
+        // Calculate projection matrix
+        var clipThroughSpace = Matrix4x4.Transpose(Matrix4x4.Inverse(portalCamera.worldToCameraMatrix)) *
+                               targetPortal._vectorPlane;
+
+        // Set portal camera projection matrix to clip walls between target portal and portal camera
+        // Inherits main camera near/far clip plane and FOV settings
+            portalCamera.projectionMatrix =
+                CalculateObliqueMatrix(
+                    _mainCamera.GetStereoProjectionMatrix(eye == XRNode.LeftEye
+                        ? Camera.StereoscopicEye.Left
+                        : Camera.StereoscopicEye.Right), clipThroughSpace);
+    }
+    private void OnDestroy()
+    {
+        if (!_canRender) return;
+        Application.onBeforeRender -= OnBeforeRender;
+        // Release render texture from GPU
+        _viewThroughRenderTextureL.Release();
+        _viewThroughRenderTextureR.Release();
+
+
+        // Destroy cloned material and render texture
+        Destroy(_viewThroughMaterial);
+        Destroy(_viewThroughRenderTextureL);
+        Destroy(_viewThroughRenderTextureR);
+    }
+
+
+    private static Vector3 TransformPositionBetweenPortals(Portal sender, Portal target, Vector3 position)
+    {
+        return
+            target.normalInvisible.TransformPoint(
+                sender.normalVisible.InverseTransformPoint(position));
+    }
+
+    private static Quaternion TransformRotationBetweenPortals(Portal sender, Portal target, Quaternion rotation)
+    {
+        return
+            target.normalInvisible.rotation *
+            Quaternion.Inverse(sender.normalVisible.rotation) *
+            rotation;
+    }
+
+    private Vector3 GetEyeWorldPosition(XRNode eye)
+    {
+        if (!XRSettings.enabled) return _mainCamera.transform.position;
+
+        InputDevice device = InputDevices.GetDeviceAtXRNode(eye);
+
+        if (!device.isValid) return default;
+
+        float cameraSeparation = _mainCamera.stereoSeparation;
+
+        return _mainCamera.transform.position + _mainCamera.transform.right *
+            (eye == XRNode.LeftEye ? -cameraSeparation : cameraSeparation) / 2;
+    }
+
+    private Quaternion GetEyeRotation(XRNode _)
+    {
+        return _mainCamera.transform.rotation;
+    }
+
+    static Matrix4x4 CalculateObliqueMatrix(Matrix4x4 projection, Vector4 clipPlane)
+    {
+        Matrix4x4 obliqueMatrix = projection;
+        Vector4 q = projection.inverse * new Vector4(
+            Math.Sign(clipPlane.x),
+            Math.Sign(clipPlane.y),
+            1.0f,
+            1.0f
+        );
+        Vector4 c = clipPlane * (2.0F / (Vector4.Dot(clipPlane, q)));
+        obliqueMatrix[2] = c.x - projection[3];
+        obliqueMatrix[6] = c.y - projection[7];
+        obliqueMatrix[10] = c.z - projection[11];
+        obliqueMatrix[14] = c.w - projection[15];
+        return obliqueMatrix;
+    }
+
+    private void OnTriggerEnter(Collider other)
+    {
+        if (!_canRender || !_shouldTeleport) return;
+        if (!other.CompareTag("Player")) return;
+        Debug.Log(transform.name + " player entered and should teleport");
+        targetPortal._shouldTeleport = false;
+        // Move player to target portal collider relative position
+        other.transform.position = TransformPositionBetweenPortals(this, targetPortal, other.transform.position);
+        other.transform.rotation = TransformRotationBetweenPortals(this, targetPortal, other.transform.rotation);
+    }
+
+    private void OnTriggerExit(Collider other)
+    {
+        if (!_canRender || !_shouldTeleport || IsInvoking(nameof(AllowTeleport))) return;
+        if (!other.CompareTag("Player")) return;
+        Debug.Log(transform.name + " player exited");
+        Invoke(nameof(AllowTeleport), 1f);
+    }
+
+    private void AllowTeleport()
+    {
+        _shouldTeleport = true;
+    }
+}

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+Shader "XR/PortalShader"
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Assets/_PROJECT/Components/Portals/XRCameraIgnore.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
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+public class XRCameraIgnore : MonoBehaviour
+{
+    private void Awake()
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