Schraubenlinie: Parametric Curve of Complex Exponential

Draw the parametric Schraubenlinie (complex exponential) geometry. Let the parameter t range from −2π to 2π and plot the component curves showing the roles of cos(t) and sin(t): one curve uses x = cos(t) with constant y = −1, and another uses x = −1 with y = sin(t). Then plot the full parametric curve combining x = cos(t) and y = sin(t) over the same t-interval. Add line segments connecting a reference point to the corresponding endpoint positions to emphasize the construction. Finally, generate a pair of curved surface patches over parameters u and v, one with v varying in the height direction and another with the fixed parameter placed differently, using the shown z-extents (from −1 to 1.5) to form the surrounding surface structure.