Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsLines in 3D Space (Parametric, Vector, and Cartesian Forms)http://demonstrations.wolfram.com/LinesIn3DSpaceParametricVectorAndCartesianForms/]]>http://demonstrations.wolfram.com/LinesIn3DSpaceParametricVectorAndCartesianForms/