#### 11.2.19 bdSurf

• bdSurf( <f(u,v)>, [options] )
• Description: defines a surface parametrized by $f\left(u,v\right)=\left[x\left(u,v\right)+i*y\left(u,v\right),z\left(u,v\right)\right]=M\left(x\left(u,v\right),y\left(u,v\right),z\left(u,v\right)\right)$, with $x$, $y$ and $z$ that are functions of the variables $u$ and $v$. bdSurf options:
• u := < [umin, umax] >. interval for the variable $u$, [-5,5] by default.
• v := < [vmin, vmax] >. interval for the variable $v$, [-5,5] by default.
• grid := < [unbdot, vnbdot] >. Defines the grid, ie the number of points for $u$ and $v$. By default the value is [$25$,$25$].
• That macro calls bdFacet, therefore options of bdFacet can be used.