From 05e7d765fd15e0008db36f26d735396a52aeae9f Mon Sep 17 00:00:00 2001
From: iaomw <iaomw@live.com>
Date: Fri, 18 Oct 2024 16:27:34 +0800
Subject: [PATCH] Minor update

---
 zenovis/xinxinoptix/XAS.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/zenovis/xinxinoptix/XAS.h b/zenovis/xinxinoptix/XAS.h
index 87d2c6e42..c46ef6868 100644
--- a/zenovis/xinxinoptix/XAS.h
+++ b/zenovis/xinxinoptix/XAS.h
@@ -118,6 +118,13 @@ namespace xinxinoptix {
     inline void buildIAS(OptixDeviceContext& context, OptixAccelBuildOptions& accel_options, std::vector<OptixInstance>& instances, 
                          raii<CUdeviceptr>& bufferIAS, OptixTraversableHandle& handleIAS) 
     {
+
+        if (instances.empty()) {
+            bufferIAS.reset();
+            handleIAS = 0llu;
+            return;
+        }
+
         raii<CUdeviceptr>  d_instances;
         const size_t size_in_bytes = sizeof( OptixInstance ) * instances.size();
         CUDA_CHECK( cudaMalloc( reinterpret_cast<void**>( &d_instances.reset() ), size_in_bytes ) );