// syhºhomework.bvr\n \n// surface\ndd=parametricSurface\ndd.setMinMax=t,0,6.5\ndd.setMinMax=s,0,6.5\ndd.setEquation=x,((2+cos(t))*cos(s))\ndd.setEquation=y,((2+cos(t))*sin(s))\ndd.setEquation=z,(sin(t))\ndd.setSegmentCount=20\ndd.color=red\ndd.spawn\n \n// line\nl=parametricCurve\nl.setMinMax=t,-5,5\nl.setEquation=x,(-2+cos(t))\nl.setEquation=y,(0)\nl.setEquation=z,(sin(t))\nl.setSegmentCount=20\nl.setThickness=0.3\nl.color=blue\nl.spawn \n\n// curve\nj=parametricCurve\nj.setMinMax=t,-5,5\nj.setEquation=x,(3*cos(t))\nj.setEquation=y,(3*sin(t))\nj.setEquation=z,(0)\nj.setSegmentCount=100\nj.setThickness=0.3\nj.color=green\nj.spawn