diff options
| -rw-r--r-- | indra/newview/gltf/llgltfloader.cpp | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/indra/newview/gltf/llgltfloader.cpp b/indra/newview/gltf/llgltfloader.cpp index 800b986b59..4d705279a5 100644 --- a/indra/newview/gltf/llgltfloader.cpp +++ b/indra/newview/gltf/llgltfloader.cpp @@ -450,9 +450,18 @@ bool LLGLTFLoader::populateModelFromMesh(LLModel* pModel, const LL::GLTF::Mesh& GLTFVertex vert; vert.position = glm::vec3(transformed_pos); - // Use pre-computed normal_transform - glm::vec3 normal_vec(prim.mNormals[i][0], prim.mNormals[i][1], prim.mNormals[i][2]); - vert.normal = glm::normalize(normal_transform * normal_vec); + if (!prim.mNormals.empty()) + { + // Use pre-computed normal_transform + glm::vec3 normal_vec(prim.mNormals[i][0], prim.mNormals[i][1], prim.mNormals[i][2]); + vert.normal = glm::normalize(normal_transform * normal_vec); + } + else + { + // Use default normal (pointing up in model space) + vert.normal = glm::normalize(normal_transform * glm::vec3(0.0f, 0.0f, 1.0f)); + LL_DEBUGS("GLTF_IMPORT") << "No normals found for primitive, using default normal." << LL_ENDL; + } vert.uv0 = glm::vec2(prim.mTexCoords0[i][0], -prim.mTexCoords0[i][1]); |