copy then rotate?

[Gary Galloway]

I considered for a while how I might create a duplicate of a 2D object;
choose a point on the perimeter of the object, and then rotate a 'copy' of
the said object around at a pre-defined angle relative to the snap angle I
created on the original object.

Imagine drawing a square and wanting to create a copy of the square. You'd
like the copy to have its lower left corner snapped to the upper right
corner of the original square but at an angle of 45 degrees. Thats the sort
of thing I was confused about. However, you may say, well why not make a
copy of the original square from the lower left origin, and paste to its
upper right corner at an angle of 45 degs?

I discovered that instead of looking for a 'copy and rotate' type routine I
could use the polar array about a specified (pre-defined) origin.

Some things at first are confusing, some are logical if you have a good
mathematical background or understanding of geometry.

The acad commands are a bit baffling due to so many, but after a while I
manage to get the job done in time to make a decent brew.

regards

Tony Blair

[Mike Leonard]

"Gary Galloway" <count...@bun.com> wrote in message
news:38a47...@news1.cluster1.telinco.net...

> I considered for a while how I might create a duplicate of a 2D object;
> choose a point on the perimeter of the object, and then rotate a 'copy' of
> the said object around at a pre-defined angle relative to the snap angle I
> created on the original object.
>
> Imagine drawing a square and wanting to create a copy of the square. You'd
> like the copy to have its lower left corner snapped to the upper right
> corner of the original square but at an angle of 45 degrees. Thats the
sort
> of thing I was confused about. However, you may say, well why not make a
> copy of the original square from the lower left origin, and paste to its
> upper right corner at an angle of 45 degs?

Set snap angle to 45 degrees and use MIRROR with the base point being the
upper right intersection.

>
> I discovered that instead of looking for a 'copy and rotate' type routine
I
> could use the polar array about a specified (pre-defined) origin.
>
> Some things at first are confusing, some are logical if you have a good
> mathematical background or understanding of geometry.

With snap angle at 0 than it would be a two item point array with the base
point being the upper right corner and the angle to fill would be 180.

[John Gruske]

Autocad 14 has MoRoCo (Move, Copy, Rotate) already installed in it.

"Gary Galloway" <count...@bun.com> wrote in message
news:38a47...@news1.cluster1.telinco.net...
> I considered for a while how I might create a duplicate of a 2D object;
> choose a point on the perimeter of the object, and then rotate a 'copy' of
> the said object around at a pre-defined angle relative to the snap angle I
> created on the original object.
>
> Imagine drawing a square and wanting to create a copy of the square. You'd
> like the copy to have its lower left corner snapped to the upper right
> corner of the original square but at an angle of 45 degrees. Thats the
sort
> of thing I was confused about. However, you may say, well why not make a
> copy of the original square from the lower left origin, and paste to its
> upper right corner at an angle of 45 degs?
>

> I discovered that instead of looking for a 'copy and rotate' type routine
I
> could use the polar array about a specified (pre-defined) origin.
>
> Some things at first are confusing, some are logical if you have a good
> mathematical background or understanding of geometry.
>