0// Helen Xu.bvr\n \n// Parametric planeA \npA=parametricSurface\npA.setMinMax=t,-2,2\npA.setMinMax=s,-2,2\npA.setEquation=x,(-t)\npA.setEquation=y,(t)\npA.setEquation=z,(s)\npA.setSegmentCount=20\npA.color=magenta\npA.spawn\n \n// Parametric planeB \npB=parametricSurface \npB.setMinMax=s,-2,2\npB.setMinMax=t,-2,2\npB.setEquation=x,(t)\npB.setEquation=y,(0)\npB.setEquation=z,(s)\npB.setSegmentCount=20\npB.color=green\npB.spawn\n\n// Parametric intersection\ninter=line\ninter.setMinMax=t,-2,2\ninter.setEquation=x,(0)\ninter.setEquation=y,(0)\ninter.setEquation=z,(t)\ninter.setSegmentCount=20\ninter.color=yellow\ninter.setThickness=0.2\ninter.spawn