#### 11.2.15 bdPlanEqn

• bdPlanEqn( <[a,b,c,d]>, [options] )
• Description: defines the plane with the equation $ax+by+cz=d$, it is represented by the list: <[a,b,c,d]>. Here are the bdPlanEqn options:
• scale := < strictly positive number >. The plane is intersected by the current 3D window, thus giving a facet that can be scaled..
• That macro calls bdFacet, in that case the options of bdFacet can be used. The option twoside is 0 by default (the two sides of the facet are not distinguished).