Random Crossing on Sphere

This video is a tutorial of making pavilion that is randomly patterned on the trimmed sphere in Rhino Grasshopper.  Grasshopper script contains 'Construct Point', 'Line SDL', 'Surface/Curve', 'Evaluate Surface', 'Project', 'Surface Split', 'Populate Geometry', 'Surface Closest Point', 'Rotate 3D', 'Brep Edges', 'Brep/Plane', 'Pipe'.