Why this surface cant be shrinktrimmedsrf?


#1

that I cant smash it properly I want,
because that hole in the surface is still not at right position after I smash it
thankscant shrink.3dm (1.4 MB)


#2

The surface is already shrunk.


what are you wanting to do exactly? and why do you think shrinking the surface will allow it to happen?


#3

hmmm , I think, after shrink when I f10 , the control point at the hole surface wont have control point

when I smash the surface , I got its planar surface doesnt have properly position at the surface

I want the hole is at the center position of surface
thanks Jeff_Hammond :slight_smile:


#4

i don’t think this object is going to Smash as one surface very well… you might have better luck using _Squish

a quick go at it gives this:

…you might be able to get better results using different settings in the command but i’m not too confident about that…


#5

wow there is a _squish usefull command I can get ^^
thanks jeff,
btw what is diff with ? smash and squish
hmmm thanks


Squish on menu and icon
#6

Squish is a normal rhino command. you already have it.
i think it’s pretty much just a more evolved version of Smash.


#7

yes its really evolved :slight_smile: thanks Jeff Hammond :slight_smile:


#8

Hi Gents

I don’t use these two commands at all, but I played with area analyzing tool in a few scenarios and picture shows my results.

Further more, I gave a 0.5 mm thickness to the study file (offset surface .25 both sides, solid) and the resulting volumes of the two pieces are way off. I believe, theoretically, the two numbers should be the same.

Care to comment?


(Pascal Golay) #9

Hi Costel - these surfaces are not developable - in order to obtain a flat pattern a lot of stretching and/or compressing needs to happen, resulting in very different surface areas. The commands can not accurately flatten such heavily curved surfaces - Smash does not even try to be accurate and Squish may do its best but it is not designed to flatten surfaces that have more than slight double curvature.

https://docs.mcneel.com/rhino/6/help/en-us/index.htm#commands/squish.htm?Highlight=squish

https://docs.mcneel.com/rhino/6/help/en-us/index.htm#commands/smash.htm?Highlight=smash

-Pascal


#10

Hi Pascal

Thank you for your very fast response (literally seconds from my posting).

Squish is one command that definitely took a lot of programing. While selecting the 3D shape there are 320 combinations that can be made. Even if we take out Outside (Up/Down) and Decorate (Yes/No) we are still left with 80 combinations that can influence the flattened geometry.

Custom A/B/C are on themselves are theoretically infinite and yet this command can only do its best?

I am very curious then what are the applications this command is used for in real life, other than a shoe last that is.

By the way, I had to google what a shoe last was and I found this picture. Can you Squish this?:wink:

Costel