April 16, 2015, 3:20am
In the helpfile about Command: _CreateUVCrv
CreateUV_Knead_1st.3dm (67.4 KB)
Note: The control polygon determines the sizes of the uv curves.
Do you know what’s the meaning of this?
In the attached file:
Command: _CreateUVCrv and then Command: _Length
U line length = 26.2393
V line length = 22.096
Why is this U line length = 26.2393 and V line length = 22.096?
Command: _ExtractControlPolygon and then Command: _Length
However the length of control poygon did not same with length of UV line.
What is the reason?
April 16, 2015, 3:24am
Hi Knead - I believe the phrase
Simply means that the overall rectangle that is unrolled will be determined by the underlying surface and not the trimmed face. Does that clarify things?
April 16, 2015, 4:20am
Unroll? But, It is not developable because it is doubly curved.
Hmm, Sorry but i can not understand it.
Would you please attach the example 3dm file?
April 16, 2015, 4:25am
CreateUVCrv_UnderlyingSrf.3dm (72.2 KB)
Does that file help?
April 16, 2015, 4:47am
In the CreateUVCrv_UnderlyingSrf.3dm:
The overall rectangle UV curves:
U Length = 262.213 millimeters
V Length = 206.779 millimeters
Are these UV length (Maximum or Minimum) of the underlying surface edges or isocurves?
I want to know how to the calculation of UV length manually from the surface.
April 16, 2015, 4:52am
These are the surface edge lengths in parameter space - the 3d edge curves may well be and usually are, different. You can untrim the surface and measure the edges to check. As far as I know there is no reliable way to know the dimensions of the UV curves from the surface.