Function vertex::computeFlatNormals

• Defined in File Vertex.ixx

Function Documentation

void vertex::computeFlatNormals(std::span<Vertex> vertices, std::span<const unsigned int> indices, std::size_t firstIndex = 0)

Per-triangle geometric (flat) normal, assigned to all three vertices of every triangle in indices[firstIndex..]. The OBJ and glTF loaders each hand-rolled this loop; this is the only copy left, so a third loader adding its own is the bug this function exists to prevent. Bounded by i + 2 < indices.size() and skips zero-area (degenerate) triangles, which would otherwise normalize a zero vector into NaN.