vertex normal
Technical term in 3D computer graphics; a vector perpendicular to a surface at a vertex, used for lighting calculations.
I calculated the vertex normals and implemented smooth shading.
The lighting looks unnatural because the vertex normals are not set correctly in this model.
面法線 (face normal) is a normal vector for an entire polygon face, while 頂点法線 is computed per vertex, often by averaging adjacent face normals for smooth shading.
Compound of 頂点 (vertex) and 法線 (normal line), a direct translation of the English term 'vertex normal' used in computer graphics.