line_parametric_form_3D

試拉動滑動軸以改變t，觀察線上動點P如何隨t之改變而變動，進而了解如何由動點P軌跡形成空間中之直線L。 Please try to make the value of t varies via the slider, observing how the moving point P moves with the variation of t, and realize why the locus of P forms the line L in 3D space.