Positioning of faces: about
Concept of positioning
We call positioning of a face on a plan or on a cylinder the operation that consists in projecting the face on a reference plan or cylinder (defined by the user).
The corresponding command is Locate faces .
Positioning of faces
Different possibilities of faces positioning proposed to the user are presented in the table below.
Location  The face is projected on … 

on a plane 
a plane defined by its equation: Ax+By+Cz+D=0 (the A, B, C and D coefficients are defined by the user) 
a plane defined by: a standard plane, an axis and a rotation angle 

on a cylinder 
a cylinder defined by: an axis, a center and a radius 
Supplementary information about planes
The planes defined by a standard plane, an axis and an angle of rotation are the following planes:
 Plane OXY / Axis X and angle θ x: plane obtained by rotation of plane OXY around the axis X of an angle θ x
 Plane OYZ / Axis Y and angle θ y: plane obtained by rotation of plane OYZ around the axis Y of an angle θ y
 Plane OZX / Axis Z and angle θ z: plane obtained by rotation of plane OZX around the axis X of an angle θ z
Example : The figure near represents a plane P obtained by rotation of plane OXY about the axis X of an angle θ x.