tangent是什么意思？

tangent

例句

• Aspline curve is presented which interpolates given points and tangent directions with piecewise involute of circle. 利用拼接的圆渐开线实现对平面上的数据点及其切向的插值.
• An application programmer must supply a tangent, binormal, and normal at each vertex. 程序员必须提供每个顶点的切线 、 副法线和法线.
• Construct an animation showing the tangent sweeping out the interior of astroid. 建构一动态绘图:展示星状线的切线所有扫掠过的内部轨迹.