orbingol / rw3dm Goto Github PK

json2on only supports spline type trim curves. It should support freeform and container trim types.

Please refer to geomdl documentation for details.

Hi everyone!

I just followed instructions from README.md file on Compiling RW3DM part, that is clone project, update submodules, create and run CMake command into build directory, run make install command (I have both executables on2json and json2on into install directory).

But when I'm using the command ./on2json test.3dm, I have the followed answer:

ON2JSON: Geometry Extractor for Rhino/OpenNURBS (RW3DM v2.1.4)
OpenNURBS version: 7.0.20071.14390

[ERROR] Geometry data was NOT extracted successfully

I am using Ubuntu 20.04 and I didn't found any similar problem on the web.

Thank you.

Describe the bug
Actions link to down binary is broken

To Reproduce
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Expected behavior
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Describe the bug
CMake 3.13.2 gives out Error when following the Installing procedure.

To Reproduce
Steps to reproduce the behavior:

1. Downloaded the repository to a local file, under a custom name
2. Updated the submodules using Git Bash
3. CMake gives out Error: "Error in configuration process, project files may be invalid"
   

I just type on2json MyONFile.3dm extract_curves=True in example(change it with my own filename)

it says on2json is not command line

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json2on can generate the trims of the BRep faces but it does not support converting inner trim curves from geomdl JSON to OpenNURBS .3dm format.

I try to export a trimmed surface from python-nurbs library. However when I open the exported 3dm file, I saw a boundary that is covering the curve.

Is it normal to trimming operations?

Hi:

Thanks for the amazing library.

I got the following error message after running on2json.exe

[ERROR] Cannot open file 'egg.3dm' for reading
[ERROR] Geometry data was NOT extracted successfully

I wonder what this message means. Btw, The file was created by Rhino 7.

Thanks.

When I applied the instructions, I am getting "command not found" on the terminal. Is there any missing point(s) on my side? I am not sure. What should I do?

Configuration:

• Operating system: Ubuntu 20.04
• CMake version: 3.16.3

Im new to geomdl / rw3dm, facing some problems with converting primitives like e.g. a sphere from 3dm to json format.

The sphere is displayed in Rhino correctly.
However, after converting the 3dm file with on2sjon, and importing again with geomdl, the geometry is significantly different from what I would expect:

import os
from geomdl import NURBS
from geomdl import exchange
from geomdl.visualization import VisMPL as vis
Import surfaces

surfs = exchange.import_json("sph_r_0p5m.json")
Plot the control point grid and the evaluated surface

surfs[0].sample_size = 100
surfs[0].delta=0.05
surfs[0].vis = vis.VisSurface()
surfs[0].render()

geometry.zip -> 3dm and json file

I have tried to toggle normalize ... no effect.

Im grateful for any help, thanks!

geometry.zip

Update OpenNURBS v6.15 to v7.0

Reference: https://github.com/mcneel/opennurbs/releases/tag/v7.0.19309.17460

rw3dm should import and export trim curves that belong to the surfaces

It looks like the output from json2on.exe is wrong when you use the current json file format. The current json file format records the control points without multiplying coordinates by the weights. It seems that json2on.exe needs the control points with the weights applied. If you simply multiple the coordinates of the control points by the weight, then json2on.exe will produce the correct output.

To Reproduce

1. Run the fiberInGroove.py script. This will output json file that should contain a cylindrical NURBS surface named fiberSurface.json.
2. Run json2on.exe fiberSurface.json to produce fiberSurface.3dm
3. Launch Rhino. Import fiberSurface.3dm and see that geometry is distorted because control points are not located correctly.
4. Import fiberSurfaceMod3_Correct.json and see that it is semi-cylindrical surface. The control points in this .json file have been multiplied by the weights listed at the end of the .json file.

These screen snapshots illustrate the differences between the two json files.
RhinoScreenSnapshots.zip

Maybe you want to think about adding a switch to the export json function that allows you to select which version of control points to export?

I tried to extract the surface control points of a solid model using the on2json executable, but the operation failed. After analysing the case, I found that rw3dm does not support converting solid models; instead, the same object is constructed using the NURBS surfaces and joined to form a solid will work fine.
Note: By solid model, I mean, cad models created by extruding from a curve etc.

bug.zip

Steps to reproduce the behaviour:

1. I am attaching a sample .3DM file of a cuboid body.
2. Run the on2json executable to extract only the surfaces: on2json cuboid.3dm extract_curves=false;
3. The error screenshot is attached.