noun
text direction vectors
Computing term for vectors that define the orientation of text in a plane, used in graphics, layout, or font rendering.
テキスト平面定義ベクトルは、文字の向きを決めるために使われる。
Text direction vectors are used to determine the orientation of characters.
Compound of テキスト (text), 平面 (plane), 定義 (definition), and ベクトル (vector). A technical term likely coined in Japanese computing contexts.