edyj/blender-to-unity3d-importer

Advanced Blender to Unity 3D model importer

blender-to-unity3d-importer's Issues

Occasionally applies unnecessary rotations

I've just tried importing some more complex models and found it's doing some unnecessary rotating.

Here's the model in question: https://drive.google.com/file/d/0B9DFPZBPKp6AdGU5czR4RDQteDQ/view?usp=sharing

When it's imported into unity with your script and the default settings, you'll notice the bike pedals incorrectly rotate 90 degrees.

If you have time could you please look into this?
I can't work it out.

Reconsider the default "Front" axis in Blender

Blender's default Front axis seems to be "-Y" instead of "+Y", as is actually taken by the importer. This is deducted from the view keys "Front" and "Back" (numpad-1, ctrl-numpad-1). When the object's Front is pointing +Y then the "Front" view shows its back.

Front should be considered to be -Y by the importer, and the actual "nozfix" flag should be reconfigured to be an optional flag ("zfix"?) that turns around the Z direction in the object.

I succeeded to get Generic Animation Clips.

Are you updating this importer,yet?
This importer is very useul.

This importer supports only Legacy Animation Clips,
but by this code, you can get Generic Animation Clips.
It works good for me.

// from https://forum.unity.com/threads/getting-animationclip-from-fbx-in-the-editor-mecanim.295229/

    public IEnumerable<AnimationClip> GetAnimationClip(GameObject go)
    {
	  AnimationClip[] clips = AnimationUtility.GetAnimationClips(go);

	  if (clips.Length == 0)
	  {
		clips = Object.FindObjectsOfType<AnimationClip>();
	  }

	  HashSet<string> importClipName = new HashSet<string>();
	  ModelImporter modelImporter = assetImporter as ModelImporter;

	  for (int i = 0; i < modelImporter.defaultClipAnimations.Length; ++i)
	  {
		importClipName.Add(modelImporter.defaultClipAnimations[i].name);
	  }

	  for (int i = 0; i < clips.Length; ++i)
	  {
		AnimationClip clip = clips[i];
		if (clip != null &&
		    importClipName.Contains(clip.name) &&
		    !EditorUtility.IsPersistent(clip))
		{
		    yield return clip;
		}
	  }
    }

Enhancement: texture import into subdir "textures"

Hi!
On your website you have a blog entry that helped me a lot to get the textures of blender models into Unity3D. So thanks for that.
I use this importer, too, so I asked myself if it would be possible somehow to add a feature to this importer that automatically extracts the textures it finds and puts it into a textures subdirectory (from the path in the Assets/xyz-folder, where the "blenderfile[importer].blend" resides.

Thanks a lot for the work you put into this so far!

Cheers,
orrence.

IndexOutOfRangeException: Array index is out of range.

If I use meshes without UVs, I've got this error:
IndexOutOfRangeException: Array index is out of range.

IndexOutOfRangeException: Array index is out of range.
EdysBlenderImporter.CalculateMeshTangents (UnityEngine.Mesh mesh) (at Assets/Editor/EdysBlenderImporter.cs:630)

I don't know, how to work on github, so I just insert my fix-code here for the next method :

public static void CalculateMeshTangents (Mesh mesh)
        {
        //speed up math by copying the mesh arrays
        int[] triangles = mesh.triangles;
        Vector3[] vertices = mesh.vertices;
        Vector2[] uv = mesh.uv;

        Vector3[] normals = mesh.normals;

        //variable definitions
        int triangleCount = triangles.Length;
        int vertexCount = vertices.Length;

        Vector3[] tan1 = new Vector3[vertexCount];
        Vector3[] tan2 = new Vector3[vertexCount];

        Vector4[] tangents = new Vector4[vertexCount];
        Vector2 w1 = Vector2.zero;
        Vector2 w2 = Vector2.zero;
        Vector2 w3 = Vector2.zero;

        for (long a = 0; a < triangleCount; a += 3)
            {
            long i1 = triangles[a + 0];
            long i2 = triangles[a + 1];
            long i3 = triangles[a + 2];


            // Skip IndexOutOfRangeException: Array index is out of range.
            if (uv.Length > 0)
            {
                // Then we have UVs for this object
                w1 = uv[i1];
                w2 = uv[i2];
                w3 = uv[i3];
            }
            else
            {
                // all UVs stays 0
            }

            Vector3 v1 = vertices[i1];
            Vector3 v2 = vertices[i2];
            Vector3 v3 = vertices[i3];

            float x1 = v2.x - v1.x;
            float x2 = v3.x - v1.x;
            float y1 = v2.y - v1.y;
            float y2 = v3.y - v1.y;
            float z1 = v2.z - v1.z;
            float z2 = v3.z - v1.z;

            float s1 = w2.x - w1.x;
            float s2 = w3.x - w1.x;
            float t1 = w2.y - w1.y;
            float t2 = w3.y - w1.y;

            float r = 1.0f / (s1 * t2 - s2 * t1);

            Vector3 sdir = new Vector3((t2 * x1 - t1 * x2) * r, (t2 * y1 - t1 * y2) * r, (t2 * z1 - t1 * z2) * r);
            Vector3 tdir = new Vector3((s1 * x2 - s2 * x1) * r, (s1 * y2 - s2 * y1) * r, (s1 * z2 - s2 * z1) * r);

            tan1[i1] += sdir;
            tan1[i2] += sdir;
            tan1[i3] += sdir;

            tan2[i1] += tdir;
            tan2[i2] += tdir;
            tan2[i3] += tdir;
            }

        for (long a = 0; a < vertexCount; ++a)
            {
            Vector3 n = normals[a];
            Vector3 t = tan1[a];

            Vector3.OrthoNormalize(ref n, ref t);
            tangents[a].x = t.x;
            tangents[a].y = t.y;
            tangents[a].z = t.z;

            tangents[a].w = (Vector3.Dot(Vector3.Cross(n, t), tan2[a]) < 0.0f) ? -1.0f : 1.0f;
            }

        mesh.tangents = tangents;
        }

Importer no longer working in Unity 2017.1

When trying to use this importer in my current version of unity I get an error. Is the importer broken for current versions of Unity?

---(Error)---

IndexOutOfRangeException: Array index is out of range.
EdysBlenderImporter.CalculateMeshTangents (UnityEngine.Mesh mesh) (at Assets/Editor/EdysBlenderImporter.cs:625)
EdysBlenderImporter.RotateMesh (UnityEngine.GameObject go, Quaternion rot) (at Assets/Editor/EdysBlenderImporter.cs:381)
EdysBlenderImporter.ProcessFirstLevel (UnityEngine.GameObject go) (at Assets/Editor/EdysBlenderImporter.cs:195)
EdysBlenderImporter.ProcessBlenderObject (UnityEngine.GameObject go) (at Assets/Editor/EdysBlenderImporter.cs:176)
EdysBlenderImporter.OnPostprocessModel (UnityEngine.GameObject go) (at Assets/Editor/EdysBlenderImporter.cs:95)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.AttributeHelper.InvokeMemberIfAvailable (System.Object target, System.String methodName, System.Object[] args) (at /Users/builduser/buildslave/unity/build/Editor/Mono/AttributeHelper.cs:168)
UnityEditor.AssetPostprocessingInternal.PostprocessMesh (UnityEngine.GameObject gameObject) (at /Users/builduser/buildslave/unity/build/Editor/Mono/AssetPostprocessor.cs:246)