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MathGroup Archive 2007

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Re: Rotate and Normal

  • To: mathgroup at smc.vnet.net
  • Subject: [mg77316] Re: Rotate and Normal
  • From: dh <dh at metrohm.ch>
  • Date: Wed, 6 Jun 2007 07:30:32 -0400 (EDT)
  • References: <f43h3a$2tb$1@smc.vnet.net>


Hy Gary,

it seems that Normal only works with 3D graphics. Try:

Normal@Rotate[Line[{{0,0},{1,1}}],Pi/4,{0,0}]

Normal@Rotate[Line[{{0,0,0},{1,1,0}}],Pi/4,{0,0,1}]

It will be hard to claim that this is a feature, I think you found a bug.

Daniel







WetBlanket wrote:

> I have been trying to use the new Rotate command.  It seems that when

> you use it it leaves the result in an unevaluated form, but I need to

> make futher calculations after performing the rotation. My

> understanding is that this is what Normal is for. But when I try to

> use it I do not get any change in the output.

> 

> An example:

> 

> In(1)= Rotate[Line[{{0, 0}, {1, 2}}], 30 =B0, {1, 1}]

> Out(1)=Rotate[Disk[{2,2}],2],45 =B0,{3,1}]

> 

> In(2)= Rotate[Line[{{0, 0}, {1, 2}}], 30 =B0, {1, 1}]//Normal

> Out(2)=Rotate[Disk[{2,2}],2],45 =B0,{3,1}]

> 

> What am I doing wrong. What must I do to get an output in a form I can

> use for futher compuitations rather than just for display?

> 

> Thanks

> Gary

> 

> 




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