private FBXNode CreateFbxMesh(MeshLOD lod, FBXScene pScene)
{
FBXMesh fbxMesh = FBXMesh.Create(pScene, lod.shortName);
FBXNode lMeshNode = FBXNode.Create(pScene, lod.shortName);
lMeshNode.SetNodeAttribute(fbxMesh);
FBXGeometryElementNormal lGeometryElementNormal = fbxMesh.CreateElementNormal();
lGeometryElementNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementBinormal lGeometryElementBiNormal = fbxMesh.CreateElementBinormal();
lGeometryElementBiNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementTangent lGeometryElementTangent = fbxMesh.CreateElementTangent();
lGeometryElementTangent.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementMaterial lMaterialElement = fbxMesh.CreateElementMaterial();
lMaterialElement.SetMappingMode(FBXWrapper.MappingMode.eByPolygon);
lMaterialElement.SetReferenceMode(FBXWrapper.ReferenceMode.eIndexToDirect);
int verticesCount = lod.GetLODTotalVertCount();
fbxMesh.InitControlPoints(verticesCount);
List <FBXGeometryElementUV[]> UVs = new List <FBXGeometryElementUV[]>();
for (int i = 0; i < lod.sections.Count; i++)
{
UVs.Add(new FBXGeometryElementUV[Vertex.UV_SLOTS]);
}
int VertexOffset = 0;
for (int i = 0; i < lod.sections.Count; i++)
{
MeshLodSection section = lod.sections[i];
for (int j = 0; j < section.vertices.Count; j++)
{
FBXVector4 position = new FBXVector4(section.vertices[j].position.members[0] * exportScale, section.vertices[j].position.members[1] * exportScale, section.vertices[j].position.members[2] * exportScale, 0);
FBXVector4 normal = new FBXVector4(section.vertices[j].normals.members[0], section.vertices[j].normals.members[1], section.vertices[j].normals.members[2], section.vertices[j].normals.members[3]);
fbxMesh.SetControlPoint(VertexOffset + j, position);
lGeometryElementNormal.Add(normal);
// adding a check on bitangent and tangent as some meshes don't have them...
if (section.vertices[j].biTangents.members.Length == 4)
{
FBXVector4 bitangent = new FBXVector4(section.vertices[j].biTangents.members[0], section.vertices[j].biTangents.members[1], section.vertices[j].biTangents.members[2], section.vertices[j].biTangents.members[3]);
lGeometryElementBiNormal.Add(bitangent);
}
if (section.vertices[j].tangents.members.Length == 4)
{
FBXVector4 tangent = new FBXVector4(section.vertices[j].tangents.members[0], section.vertices[j].tangents.members[1], section.vertices[j].tangents.members[2], section.vertices[j].tangents.members[3]);
lGeometryElementTangent.Add(tangent);
}
// multiple UVs management
for (int uvInd = 0; uvInd < Vertex.UV_SLOTS; uvInd++)
{
if (section.vertices[j].texCoords[uvInd] != null)
{
FBXVector4 texCoords = new FBXVector4(section.vertices[j].texCoords[uvInd].members[0], (-section.vertices[j].texCoords[uvInd].members[1] + 1), 0, 0);
if (UVs[i][uvInd] == null)
{
// if the UV layer does not already exist, we create it...
UVs[i][uvInd] = fbxMesh.CreateElementUV(section.matName + "_" + uvInd);
UVs[i][uvInd].SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
UVs[i][uvInd].SetReferenceMode(FBXWrapper.ReferenceMode.eDirect);
// ... and fill it with empty vectors for all previous sections vertices.
for (int p = 0; p < VertexOffset + j; p++)
{
UVs[i][uvInd].Add(new FBXVector4(0, 0, 0, 0));
}
}
// and now we can add the tex coord of the current vertex we're treating.
UVs[i][uvInd].Add(texCoords);
}
}
// since we use direct reference mode for UV, every vertices in the mesh must be present in every UV layer
// so for every UV layer created for previous section, we had an empty vector for this vertex.
UVs.Where((o, oi) => oi != i).ToList().ForEach(suv =>
{
for (int subuv = 0; subuv < Vertex.UV_SLOTS; subuv++)
{
if (suv[subuv] != null)
{
suv[subuv].Add(new FBXVector4(0, 0, 0, 0));
}
}
}
);
}
for (int j = 0; j < section.indicies.Count; j++)
{
if (j % 3 == 0)
{
fbxMesh.EndPolygon();
fbxMesh.BeginPolygon(i);
}
fbxMesh.AddPolygon(VertexOffset + section.indicies[j]);
}
fbxMesh.EndPolygon();
VertexOffset = VertexOffset + section.vertices.Count;
lMeshNode.AddMaterial(pScene, section.matName);
}
return(lMeshNode);
}
private FBXNode CreateFbxMesh(MeshLOD lod, FBXScene pScene)
{
FBXMesh fbxMesh = FBXMesh.Create(pScene, lod.shortName);
FBXNode lMeshNode = FBXNode.Create(pScene, lod.shortName);
lMeshNode.SetNodeAttribute(fbxMesh);
FBXGeometryElementNormal lGeometryElementNormal = fbxMesh.CreateElementNormal();
lGeometryElementNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementBinormal lGeometryElementBiNormal = fbxMesh.CreateElementBinormal();
lGeometryElementBiNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementTangent lGeometryElementTangent = fbxMesh.CreateElementTangent();
lGeometryElementTangent.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementMaterial lMaterialElement = fbxMesh.CreateElementMaterial();
lMaterialElement.SetMappingMode(FBXWrapper.MappingMode.eByPolygon);
lMaterialElement.SetReferenceMode(FBXWrapper.ReferenceMode.eIndexToDirect);
int verticesCount = lod.GetLODTotalVertCount();
fbxMesh.InitControlPoints(verticesCount);
List <FBXGeometryElementUV> UVs = new List <FBXGeometryElementUV>();
for (int i = 0; i < lod.sections.Count; i++)
{
MeshLodSection section = lod.sections[i];
FBXGeometryElementUV lUVDiffuseElement = fbxMesh.CreateElementUV(section.matName);
lUVDiffuseElement.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
lUVDiffuseElement.SetReferenceMode(FBXWrapper.ReferenceMode.eDirect);
UVs.Add(lUVDiffuseElement);
}
int VertexOffset = 0;
for (int i = 0; i < lod.sections.Count; i++)
{
MeshLodSection section = lod.sections[i];
for (int j = 0; j < section.vertices.Count; j++)
{
FBXVector4 position = new FBXVector4(section.vertices[j].position.members[0] * exportScale, section.vertices[j].position.members[1] * exportScale, section.vertices[j].position.members[2] * exportScale, 0);
FBXVector4 normal = new FBXVector4(section.vertices[j].normals.members[0], section.vertices[j].normals.members[1], section.vertices[j].normals.members[2], section.vertices[j].normals.members[3]);
FBXVector4 textCoords = new FBXVector4(section.vertices[j].texCoords.members[0], (-section.vertices[j].texCoords.members[1] + 1), 0, 0);
FBXVector4 bitangent = new FBXVector4(section.vertices[j].biTangents.members[0], section.vertices[j].biTangents.members[1], section.vertices[j].biTangents.members[2], section.vertices[j].biTangents.members[3]);
FBXVector4 tangent = new FBXVector4(section.vertices[j].tangents.members[0], section.vertices[j].tangents.members[1], section.vertices[j].tangents.members[2], section.vertices[j].tangents.members[3]);
fbxMesh.SetControlPoint(VertexOffset + j, position);
lGeometryElementNormal.Add(normal);
lGeometryElementBiNormal.Add(bitangent);
lGeometryElementTangent.Add(tangent);
int uvI = 0;
foreach (FBXGeometryElementUV uv in UVs)
{
if (uvI == i)
{
uv.Add(textCoords);
}
else
{
uv.Add(new FBXVector4(0, 0, 0, 0));
}
uvI++;
}
}
for (int j = 0; j < section.indicies.Count; j++)
{
if (j % 3 == 0)
{
fbxMesh.EndPolygon();
fbxMesh.BeginPolygon(i);
}
fbxMesh.AddPolygon(VertexOffset + section.indicies[j]);
}
fbxMesh.EndPolygon();
VertexOffset = VertexOffset + section.vertices.Count;
lMeshNode.AddMaterial(pScene, section.matName);
}
return(lMeshNode);
}