RayTracingAccelerationStructure.BuildSettings

Definition

• Type: Struct
• Namespace: UnityEngine.Rendering
• Assembly: UnityEngine.CoreModule

public struct RayTracingAccelerationStructure.BuildSettings

Remarks

using UnityEngine;using UnityEngine.Rendering;public class RayTracingManager : MonoBehaviour{    // References to renderers that will be ray traced    public Renderer[] sceneRenderers;    private RayTracingAccelerationStructure rtas;    private bool isInitialized = false;    void Start()    {        InitializeRayTracing();    }    void OnDestroy()    {        // Clean up acceleration structure        if (rtas != null)        {            rtas.Dispose();            rtas = null;        }    }    void Update()    {        if (!isInitialized || rtas == null)            return;        // Rebuild acceleration structure each frame to handle dynamic objects        UpdateAccelerationStructure();    }    private void BuildAccelerationStructure()    {        if (Camera.main == null)            return;        var buildSettings = new RayTracingAccelerationStructure.BuildSettings(            // Build the acceleration structure for maximum ray tracing performance...            RayTracingAccelerationStructureBuildFlags.PreferFastTrace,            // ...and with camera-relative ray tracing.            Camera.main.transform.position        );        rtas.Build(buildSettings);    }    private void InitializeRayTracing()    {        if (sceneRenderers == null || sceneRenderers.Length == 0)        {            Debug.LogError("ERROR: No renderers assigned for ray tracing.");            return;        }        // Create acceleration structure        rtas = new RayTracingAccelerationStructure();        // Configure submesh flags        RayTracingSubMeshFlags[] subMeshFlags = new RayTracingSubMeshFlags[1];        subMeshFlags[0] = RayTracingSubMeshFlags.Enabled | RayTracingSubMeshFlags.ClosestHitOnly;        // Add all renderers to acceleration structure        foreach (var renderer in sceneRenderers)        {            if (renderer != null)            {                rtas.AddInstance(                    renderer,          // Renderer to add                    subMeshFlags,      // Hit shader setup                    true,              // Disable triangle culling                    false,             // Consider front triangles as clockwise relative to the ray direction                    0xff,              // Instance mask (all bits set)                    0                  // Layer value                );            }        }        // Perform initial build        BuildAccelerationStructure();        isInitialized = true;    }    private void UpdateAccelerationStructure()    {        // Update transform of all instances        foreach (var renderer in sceneRenderers)        {            if (renderer != null)            {                rtas.UpdateInstanceTransform(renderer);            }        }        // Rebuild the structure        BuildAccelerationStructure();    }}

Properties