Hi All - what do you think about an idea to let command scale (1d, 2d,3d) behave as Gumball scale and mirror object(s) if negative. At least as a switch in command options (AllowMirror=Yes/No). Is there any reason why these two are different? I’d like to be able to mirror with negative command scale.
–jarek
Hah… Didn’t even realize inputting negative numbers in Scale would mirror, good trick! Not sure I’d ever use anything other than -1 to just mirror without scaling, but it’s a cool feature nonetheless… I see that BoxEdit also works this way. Definitely +1 (or should I say -1?) on this for the Scale command.
–Mitch
Hi @pascal,
Is there any reason why Gumball and BoxEdit allow negative scale as mirror and regular Rhino commands don’t ?
–jarek
Hi Jarek - no reason that I know of other than that Gumball came later and Scale has not caught up, I bet no one thought of it - to the functionality it introduced…
http://mcneel.myjetbrains.com/youtrack/issue/RH-31784
-Pascal
Ha, thanks Pascal. I’m glad I was the first one that did ; )
But the catch seems to be that you need to know the exact size of the object in the axis you are (negative) scaling. If you use a number smaller than the dimension it just shrinks the object, if the number is larger then you get a stretched mirror.
Nick
Yeah, I forgot Gumby has changed in V6 - using + or - and a numnber expands or shrinks by that amount in model units now; add units to override model units. (or 2x if the gumball is centered - that is, it shrinks that much from handle to the gumball center)
-Pascal
Hi @nick, @pascal,
Looks like now the command version of Scale (2D and 1D too) mode does take the absolute value of what I type to use either as a scale factor or the distance. So I don’t see a problem with reading ’ - ’ as a mirror and then scale by the given factor.
No need to change Gumby, but I actually thought at some point it was discussed to use double – or ++ to decrease/increase the size in given direction, no? Now I see that single ‘-’ is taken as a dimension reduction, not a negative value for scale; still just dragging the scale handles allows mirroring in Gumball…
–jarek
right now + and ++ in the scale value do the exact same thing here. If I have a cube that is 20mm on X, when I input “+2” in the X gumball scale (gumball centered on object) the resulting length is 24mm (+2 from center on each side). If I input “++2” I also get 24mm. Is this the intended behaviour?
Also, is there a way to make that 20mm dimension to become a explicit width, like 25.6mm, instead or usind scale factors or additions? Like I would type a new value in the Boxedit numeric field?