RhinoDoc from .3dm

Rhino Developer
, ,
1

How can I create a RhinoDoc object from a .3dm file? I am asking this in the context of unit testing.

The only approach I see is to

  1. Create a new RhinoDoc
  2. Create a new File3DM by reading the .3dm
  3. Serially add object to the RhinoDoc from File3DM

Is there any other way that I am missing?

2

You can open a 3dm file headless, that is, without the Rhino UI loaded

https://developer.rhino3d.com/api/rhinocommon/rhino.rhinodoc/openheadless

Also, check the Rhino.Testing nuget package, it is rather new though.

1 Like
3

Thanks @menno, I am in fact using that library. I tried the OpenHeadless method and it gives me null. I am making sure the path is correct.

4

I have the simplest test

using Rhino;
using NUnit.Framework;
using SpaceRhino.Commands;
using Rhino.Testing.Fixtures;

namespace SpaceRhino.UnitTests
{
    [TestFixture]
    public class Tests : RhinoTestFixture
    {
        
        [Test]
        public void PurgeMaterials_WhenCalledOnASpecificFile_ReturnsSpecificString()
        {
            // Arrange
            string projectDirectory = Directory.GetParent(Environment.CurrentDirectory).Parent.Parent.FullName;
            string filePath = Path.Combine(projectDirectory, "Files", "purge_materials.3dm");
            RhinoDoc doc = RhinoDoc.OpenHeadless(filePath);

            // Act
            string result = SpacePurgeMaterials.PurgeMaterials(doc);

            // Assert
            Assert.AreEqual("Purged 36 materials from the file.", result);
        }


    }
}

csProj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net48</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
	  <langversion>10.0</langversion>
	  <RhinoSystemDirectory>C:\Program Files\Rhino 7\System</RhinoSystemDirectory>
  </PropertyGroup>

	<ItemGroup>
		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.*" />
		<PackageReference Include="NUnit" Version="3.14" />
		<PackageReference Include="NUnit3TestAdapter" Version="4.5" />
		<PackageReference Include="Rhino.Testing" Version="8.0.5-beta" />
		<PackageReference Include="RhinoCommon" Version="7.30.23163.13001" />
	</ItemGroup>

	<ItemGroup>
	  <ProjectReference Include="..\SpaceRhino\SpaceRhino.csproj" />
	</ItemGroup>

	<ItemGroup>
		<None Update="Rhino.Testing.Configs.xml" CopyToOutputDirectory="always" />
	</ItemGroup>

</Project>
5

I have System.AccessViolationException : Attempted to read or write protected memory. This is often an indication that other memory is corrupt. Where I am creating RhinoDoc.

6

I have made sure the file has full access control

7

@eirannejad,

Can you please create a sample test that uses RhinoDoc.OpenHeadless in this repo?

8

@Devang_Chauhan I can replicate this issue in Rhino 8 and net48 framework. Created a ticket for it to get fixed:

RH-80735 Rhino inside crashes with AccessViolationException when closing RhinoDoc instance

1 Like
9

@eirannejad is it possible to test commands with Rhino.Testing? Take this example:

[Test]
public void TestCommand()
{
    string output = Path.GetDirectoryName(GetType().Assembly.Location);
    string modelPath = Path.Combine(output, @"Files\circle.3dm");

    var doc = RhinoDoc.Open(modelPath, out bool _);
    var result = RhinoApp.RunScript("_-Line 0,0,0 10,10,10", false);
}

I expect this to add a line object to doc. However, it does not, and result == false.

Do you have an example for how to run commands with this library?

10

Just checking to see the status of this issue. Also is calling OpenHeadless only an issue in net48?

Thanks, Larry