Mirror operator
Relatively New user here, and having trouble with the "mirror" operation.
As I understand the documentation the mirror operation should create a
mirrored copy of the object(s) within its scope.
When I do that to a set of objects, it creates the mirrored items, but not
the original (unmirrored) ones.
I my understanding wrong, or am I missing something?
as an example
bigd=10;
smalld=3;
h1=20;
mirror(v=[1,0,0]) translate ([-10,-12,-10]) union () {
cylinder (d1=bigd,d2=smalld, h=h1+.2 );
translate ([-1.75,0,0]) cube ([3,6,h1+.2] );
}
gives me only one object, not the two, mirrored ones I was expecting.
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The result is as expected.
If you need the two objects, you need to define both.
define the first one, then define the mirrored one.
Jean-Paul
N1JPL
On Mar 14, 2017, at 8:21 PM, jim_klessig jim.klessig@gmail.com wrote:
Relatively New user here, and having trouble with the "mirror" operation.
As I understand the documentation the mirror operation should create a
mirrored copy of the object(s) within its scope.
When I do that to a set of objects, it creates the mirrored items, but not
the original (unmirrored) ones.
I my understanding wrong, or am I missing something?
as an example
bigd=10;
smalld=3;
h1=20;
mirror(v=[1,0,0]) translate ([-10,-12,-10]) union () {
cylinder (d1=bigd,d2=smalld, h=h1+.2 );
translate ([-1.75,0,0]) cube ([3,6,h1+.2] );
}
gives me only one object, not the two, mirrored ones I was expecting.
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mirror() is an operator like rotate(): it transforms objetcs, doesn't
create copies. See:
https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Tips_and_Tricks#Create_a_mirrored_object_while_retaining_the_original
2017-03-14 21:21 GMT-03:00 jim_klessig jim.klessig@gmail.com:
Relatively New user here, and having trouble with the "mirror" operation.
As I understand the documentation the mirror operation should create a
mirrored copy of the object(s) within its scope.
When I do that to a set of objects, it creates the mirrored items, but not
the original (unmirrored) ones.
I my understanding wrong, or am I missing something?
as an example
bigd=10;
smalld=3;
h1=20;
mirror(v=[1,0,0]) translate ([-10,-12,-10]) union () {
cylinder (d1=bigd,d2=smalld, h=h1+.2 );
translate ([-1.75,0,0]) cube ([3,6,h1+.2] );
}
gives me only one object, not the two, mirrored ones I was expecting.
--
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Mirror-operator-tp20900.html
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Ok, thanks.That does not agree with what the example seems to indicate, and does make it a fairly useless operator imo.
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-------- Original message --------From: "louijp [via OpenSCAD]" ml-node+s1091067n20901h34@n5.nabble.com Date: 3/14/17 5:41 PM (GMT-08:00) To: jim_klessig jim.klessig@gmail.com Subject: Re: Mirror operator
The result is as expected.
If you need the two objects, you need to define both.
define the first one, then define the mirrored one.
Jean-Paul
N1JPL
On Mar 14, 2017, at 8:21 PM, jim_klessig <[hidden email]> wrote:
Relatively New user here, and having trouble with the "mirror" operation.
As I understand the documentation the mirror operation should create a
mirrored copy of the object(s) within its scope.
When I do that to a set of objects, it creates the mirrored items, but not
the original (unmirrored) ones.
I my understanding wrong, or am I missing something?
as an example
bigd=10;
smalld=3;
h1=20;
mirror(v=[1,0,0]) translate ([-10,-12,-10]) union () {
cylinder (d1=bigd,d2=smalld, h=h1+.2 );
translate ([-1.75,0,0]) cube ([3,6,h1+.2] );
}
gives me only one object, not the two, mirrored ones I was expecting.
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2017-03-14 22:01 GMT-03:00 jim_klessig jim.klessig@gmail.com:
That does not agree with what the example seems to indicate, and does make
it a fairly useless operator imo.
You are perfectly right regarding the manual: the first examples are
misleading and need to be corrected. But mirror() is as useful as rotate()
and other operators that do not make copies.
Examples corrected.
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Ronaldo wrote
But mirror() is as useful as rotate()
besides the fact that it has really some funny implementation. Try this:
mirror([0, .2, 0]) cube (10);
mirror([1, .2, 0]) cube (10);
mirror([1, 1, .1]) cube (10);
mirror([1, 1, 1]) cube (10);
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and does make it a fairly useless operator imo
It creates a mirror image of an object. I don't think there is another way
to do that except by using multmatrix (which can also do rotate, translate,
scale, etc.) so it is useful for me. For example, to make left and right
hand versions of brackets.
On 15 March 2017 at 14:45, Parkinbot rudolf@parkinbot.com wrote:
Ronaldo wrote
But mirror() is as useful as rotate()
besides the fact that it has really some funny implementation. Try this:
mirror([0, .2, 0]) cube (10);
mirror([1, .2, 0]) cube (10);
mirror([1, 1, .1]) cube (10);
mirror([1, 1, 1]) cube (10);
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Hi.
2017-03-15 2:01 GMT+01:00 jim_klessig jim.klessig@gmail.com:
[...] does make it a fairly useless operator imo.
I've lost count of the number of times mirror() has saved me time. So it
doesn't imo :-)
In any case is almost trivial to get what you want. Just define you own
function (mirror2?) and use it instead of mirror(). For example, I've
used this many times:
*module *mirror2(v) {
children();
mirror(v) children();
}
hth :-)
You could always just scale to -1
scale([-1,1,1]) text("redrum");
On Wed, Mar 15, 2017 at 10:43 AM, nop head nop.head@gmail.com wrote:
and does make it a fairly useless operator imo
It creates a mirror image of an object. I don't think there is another way
to do that except by using multmatrix (which can also do rotate, translate,
scale, etc.) so it is useful for me. For example, to make left and right
hand versions of brackets.
On 15 March 2017 at 14:45, Parkinbot rudolf@parkinbot.com wrote:
Ronaldo wrote
But mirror() is as useful as rotate()
besides the fact that it has really some funny implementation. Try this:
mirror([0, .2, 0]) cube (10);
mirror([1, .2, 0]) cube (10);
mirror([1, 1, .1]) cube (10);
mirror([1, 1, 1]) cube (10);
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