MathGroup Archive 2010

[Date Index] [Thread Index] [Author Index]

Search the Archive

Normal with GeometricTransformation


The "More Information" for the GeometricTransformation function states: 

 

"Normal[expr] if possible replaces all GeometricTransformation[Subscript[g,
i],\[Ellipsis]] constructs by versions of the Subscript[g, i] in which the
coordinates have explicitly been transformed."

 

I just wonder if "if possible" means "never" because here is about as simple
a case as one can get.

 

gr = Line[{{0, 0}, {1, 0}, {1, 1}, {0, 1}, {0, 0}}]; 

 

Graphics[{gr, Red, 

  GeometricTransformation[gr, TranslationTransform[{.5, .5}]]}, 

 Frame -> True] 

 

Now try to make the translation explicit by using Normal.

 

GeometricTransformation[gr, TranslationTransform[{.5, .5}]] // Normal 

 

It does nothing. There are cases where it would be useful to have the actual
transformed points. Any ideas on how to make this work?

 

 

David Park

djmpark at comcast.net

 <http://home.comcast.net/~djmpark> http://home.comcast.net/~djmpark/  


  • Prev by Date: Re: how to scale text to a bounding rectangle?
  • Next by Date: Re: Answer
  • Previous by thread: Re: How to construct symmetric matrix from just a one
  • Next by thread: Re: Normal with GeometricTransformation