10.9.11 getplan

• getplan( <[3Dpoint,3Dvector]> [, scale] )
• Description: that macro returns a facet corresponding to the plane <[3Dpoint,3Dvector]> clipped by the current 3D window. The plane is defined in the form of one of its points and a normal vector. The optional parameter <scale>, is $1$ by default, is used to scale up or down the size of that facet.