surface from parametric equations of coordinates

[micknat]

Hello everyone,
I have a problem... a customer gives me the three equations that describe a surface according to two parameters, we say t and m. equations are therefore in the form:

x=x(t,m)
y=y(t,m)
z=z(t,m)

if you can't "turn" the system and create, then, an explicit equation of the type z=z(x,y)... how can I do to create that surface?
Is there anyone who can give me a cue?

Thank you very much

 

[ferrezio]

search between the forums (surface by points) or in the catia gida in gsd (in the index look for the word "external" or "external"), you should tove a macro that through a set of coordinates creates points, arches and surfaces.
This is enough by excel, to associate functions with coordinates.

otherwise you should write functions through the fog command that you trevi knowledge, but I don't know if you have a license with that command.

Hi.

 

[micknat]

great ezio,
Thank you.
I'll try... my problem cmq, I don't know if I explained well, is that however I will have to realize the exact surface from this cloud of points... not a approximation as with the qsr module... Do you think he's doing it?

 

[micknat]

I tried the macro you said...
but leaves the software very free from one corner to the other... if I go to do, then a dimensional comparison between cloud of points and surface I fear to find excessive shocks. . .
Instead, I would need to be right on the theoretical surface for each couple of coordinates (x,y) within the domain...

 

[ferrezio]

I tried the macro you said...
but leaves the software very free from one corner to the other... if I go to do, then a dimensional comparison between cloud of points and surface I fear to find excessive shocks. . .
Instead, I would need to be right on the theoretical surface for each couple of coordinates (x,y) within the domain...

but if you have a cloud of points you have to work with quick surface recostruction.

in that case you just have a text file with the coodinate (x,y,z with a space between values), then to make the approximation with the cloud thinks of the system.

Hi.