// For use only by FbxExportGlobals. internal static FbxMesh CreateFbxMesh(FbxExportGlobals G, GeometryPool pool, string poolName) { FbxMesh fbxMesh = FbxMesh.Create(G.m_manager, poolName); ExportMesh mesh = new ExportMesh(pool); int nVerts = mesh.m_pool.m_Vertices.Count; fbxMesh.InitControlPoints(nVerts); unsafe { fixed(Vector3 *f = mesh.m_pool.m_Vertices.GetBackingArray()) { Globals.SetControlPoints(fbxMesh, (IntPtr)f); } } List <int> triangles = mesh.m_pool.m_Tris; // Not available in Unity's wrappers // fbxMesh.ReservePolygonCount(triangles.Count / 3); // fbxMesh.ReservePolygonVertexCount(triangles.Count); for (int i = 0; i < triangles.Count; i += 3) { fbxMesh.BeginPolygon(-1 /* Material */, -1 /* Texture */, -1 /* Group */, false /* Legacy */); fbxMesh.AddPolygon(triangles[i]); fbxMesh.AddPolygon(triangles[i + 1]); fbxMesh.AddPolygon(triangles[i + 2]); fbxMesh.EndPolygon(); } FbxLayer layer0 = fbxMesh.GetLayer(0); if (layer0 == null) { fbxMesh.CreateLayer(); layer0 = fbxMesh.GetLayer(0); } var layerElementNormal = FbxLayerElementNormal.Create(fbxMesh, "normals"); layerElementNormal.SetMappingMode(FbxLayerElement.EMappingMode.eByControlPoint); layerElementNormal.SetReferenceMode(FbxLayerElement.EReferenceMode.eDirect); CopyToFbx(layerElementNormal.GetDirectArray(), mesh.m_pool.m_Normals); layer0.SetNormals(layerElementNormal); var layerElementColor = FbxLayerElementVertexColor.Create(fbxMesh, "color"); layerElementColor.SetMappingMode(FbxLayerElement.EMappingMode.eByControlPoint); layerElementColor.SetReferenceMode(FbxLayerElement.EReferenceMode.eDirect); CopyToFbx(layerElementColor.GetDirectArray(), mesh.m_linearColor); layer0.SetVertexColors(layerElementColor); var layerElementTangent = FbxLayerElementTangent.Create(fbxMesh, "tangents"); layerElementTangent.SetMappingMode(FbxLayerElement.EMappingMode.eByControlPoint); layerElementTangent.SetReferenceMode(FbxLayerElement.EReferenceMode.eDirect); CopyToFbx(layerElementTangent.GetDirectArray(), mesh.m_pool.m_Tangents); layer0.SetTangents(layerElementTangent); // Compute and export binormals since Unity's FBX importer won't import the tangents without // them, even though they're not used. var layerElementBinormal = FbxLayerElementBinormal.Create(fbxMesh, "binormals"); layerElementBinormal.SetMappingMode(FbxLayerElement.EMappingMode.eByControlPoint); layerElementBinormal.SetReferenceMode(FbxLayerElement.EReferenceMode.eDirect); var binormals = mesh.m_pool.m_Tangents .Select((tan, idx) => { var b3 = Vector3.Cross(tan, mesh.m_pool.m_Normals[idx]) * tan.w; return(new Vector4(b3.x, b3.y, b3.z, 1)); }) .ToList(); CopyToFbx(layerElementBinormal.GetDirectArray(), binormals); layer0.SetBinormals(layerElementBinormal); var layerElementMaterial = FbxLayerElementMaterial.Create(fbxMesh, "materials"); layerElementMaterial.SetMappingMode(FbxLayerElement.EMappingMode.eAllSame); layer0.SetMaterials(layerElementMaterial); // Export everything up to the last uvset containing data // even if some intermediate uvsets have no data. // Otherwise Unity will get the uvset numbering wrong on import List <List <Vector2> > uvSets = DemuxTexcoords(mesh.m_pool); for (int i = 0; i < uvSets.Count; i++) { FbxLayer layerN = fbxMesh.GetLayer(i); while (layerN == null) { fbxMesh.CreateLayer(); layerN = fbxMesh.GetLayer(i); } var layerElementUV = FbxLayerElementUV.Create(fbxMesh, String.Format("uv{0}", i)); layerElementUV.SetMappingMode(FbxLayerElement.EMappingMode.eByControlPoint); layerElementUV.SetReferenceMode(FbxLayerElement.EReferenceMode.eDirect); List <Vector2> uvSet = uvSets[i]; if (uvSet == null) { // Do nothing // Replicates what the old fbx export code did; seems to work fine } else { Debug.Assert(uvSet.Count == nVerts); CopyToFbx(layerElementUV.GetDirectArray(), uvSet); } layerN.SetUVs(layerElementUV, FbxLayerElement.EType.eTextureDiffuse); } return(fbxMesh); }