Merge topic 'fix-optix-crash'

06810032 Fix VisRTX crash when MDL lib is not found

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Mathieu Westphal <mathieu.westphal@kitware.com>
Merge-request: !6378

Rendering/RayTracing/RTWrapper/VisRTX/Material.h

@@ -35,10 +35,17 @@ namespace RTW
             else
             {
                 const std::string materialname = "::ospray::" + this->type;
-                this->material = rtx->CreateMDLMaterial(materialname.c_str(), (char*)OSPRay_mdl, (uint32_t) sizeof(OSPRay_mdl), 0, nullptr, VisRTX::CompilationType::INSTANCE);
-                if (!this->material)
+                try
+                {
+                    this->material = rtx->CreateMDLMaterial(materialname.c_str(), (char*)OSPRay_mdl, (uint32_t) sizeof(OSPRay_mdl), 0, nullptr, VisRTX::CompilationType::INSTANCE);
+                }
+                catch(const std::exception&)
                 {
                     std::cerr << "CreateMDLMaterial failed! Falling back to BasicMaterial.\n";
+                    this->material = nullptr;
+                }
+                if (!this->material)
+                {
                     this->material = rtx->CreateBasicMaterial();
                 }
             }