projection of a curve on surface

[simolrg]

Good morning.
must project a pavè built in plant on a bracelet, using the projection command of curve , mapping method.
I did so:
I developed the surface of the bracelet in the plant with the special command, after which I designed the pavè where I wanted to place it and below I projected it in the surface respecting the reference data. everything worked egregiamente in fact the program projects well the curves, but in reality it tends to ovalizzarle forms in a direction ... how can I do to make the projection more precise?
es: I projected a circle and looking at it from the top you see that it is very ovalized.

cordial greetings

wide simon.

 

[euro_ii]

as you see in figure these are the choices you have available to control the type of projection ..

I hope they'll solve your problem.
if you attach an example that we look at..


Hi.
Matteo

 

[simolrg]

I don't have the problem that I don't know how to make projections... or I don't know how to choose the right method... in my case I use mapping....the problem is that I get ovalized the projected curves... That's something else.
wide simon.

 

[Gabriz]

Hello simone,
that a circle projected on a curved surface by agglomeration is then ovalized seems normal, it is a geometric question. in order to be able to see it perfectly circular you should project it using "direction view", in this case looking at the surface from that direction - and only from that - the circle will appear perfect, except obviously being deformed by any other direction you observe it, indeed not, turning the surface of 180 degrees will return to be a circle
Frankly, I am not sure that this is the answer you are looking for, as an example said, would change understanding.

Hi.

 

[heterodyne]

Hi.
seems to me everything works properly: normal projection, circle > spherical surface
the curvature indicates that the projected circle is indeed a circle

Hi.

 

[simolrg]

I obviously don't know how to explain. I have a set of circles in the plant that I then have to bring back on a form surface .in practice I have to build a pavè of stones. Have you ever used the mapping command? has it happened to you that what you project stretches too much in x or y? How did you solve the problem? how do you mix well the x,y,z parameters of the curve with those of the surface? or do you make an approximate calculation?

 

[heterodyne]

I obviously don't know how to explain. I have a set of circles in the plant that I then have to bring back on a form surface .in practice I have to build a pavè of stones. Have you ever used the mapping command? has it happened to you that what you project stretches too much in x or y? How did you solve the problem? how do you mix well the x,y,z parameters of the curve with those of the surface? or do you make an approximate calculation?View attachment 38854

Hi.
I think it's more than normal because you're carrying out a projection on a double curvature surface.
with this type of surfaces the projection performs a approximation.

ideally you should develop on the floor the surface that is in double curvature, organize and then arrange the hexagons within the development, then redesign everything.

I remember a long time ago that I saw a thinkdesign module that solved these problems: in practice discrete the mesh surface and therefore calculated the development.

I suggest you do what in rhino that has a moduletto that should do to your case... is called "squish"

 

[simolrg]

Yes, yes, I developed the surface.

 

[dddavide]

to have the 2d development of a pipe with holes as you do in think3? can you create a tube by extruding a circle, then making solid shell, putting a crack and then saying it develops?

 

[simolrg]

It has nothing to do with my discussion, but I answer you the same.
is used the command develops surface with insert activated surface.