As display of /gn/s is performed from a $R^3$ perspective, then /pos/ was issued to commonly define the projection into $R^2$ (paper, screen).

Objects can be created by calls of the form `new("pos")`

and
modified with `rsba3k`

function.

`posi`

:Object of class

`"matrix"`

: each row is associated to a node; columns are the three coordinates and a decoration code for the node; then a nbnx4 matrix.`view`

:Object of class

`"numeric"`

: the two angles (in grades ?) for the projection into $R^2$. (0,0) means the use of (x,y).`zoom`

:Object of class

`"numeric"`

: four values: center point after normalization on [-1,+1] instead of [min,MAX] and the the magnifying factor for both coordinates. (0,0,0,1) implies the standard fitted view.

See

`print8pos`

for the details.

~~further notes~~

J.-B. Denis

1 | ```
showClass("pos")
``` |

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