//Shenwei Li.bvr\n\n// Parametric surface\ncyl=parametricSurface\ncyl.setMinMax=t,0,6.6\ncyl.setMinMax=s,0,3.14\ncyl.setEquation=x,(4*cos(t)*sin(s))\ncyl.setEquation=y,(4*sin(t)*sin(s))\ncyl.setEquation=z,(4*cos(s))\ncyl.setSegmentCount=80\ncyl.setThickness=0.1\ncyl.color=blue\ncyl.spawn\n\n//Parametric great curve\ngreat=parametricCurve\ngreat.setMinMax=t,0,6.6\ngreat.setEquation=x,(4*cos(t))\ngreat.setEquation=y,(0)\ngreat.setEquation=z,(4*sin(t))\ngreat.setSegmentCount=40\ngreat.setThichness=0.1\ngreat.color=red\ngreat.spawn\n\n//parametric regular curve\nregular=parametricCurve\nregular.setMinMax=t,0,6.6\nregular.setEquation=x,(3*cos(t))\nregular.setEquation=y,(3*sin(t))\nregular.setEquation=z,(2.65)\nregular.setSegmentCount=40\nregular.setThickness=0.1\nregular.color=green\nregular.spawn\n