new file:   cardiod3dv1.py
new file:   crossing_lines_hypocycloid.py
new file:   fat_torus.py
new file:   fat_torusv2.py
new file:   heart_torus.py
new file:   inside_out_torus.py
new file:   pentagon_triangle_orig.py
new file:   planecircle.py
new file:   planeobject.py
modified:   polyhedral_strand.py
new file:   simple_winding.py
new file:   torusv1.py
modified:   x_vs_y_oscilloscope.py