std::shared_ptr<Mesh> FbxParser::CreateMesh(GameObjectPtr node, FbxNode * fbxNode) { Mesh::Ptr mesh = Mesh::Create(fbxNode->GetName()); FbxMesh* fbxMesh = static_cast<FbxMesh*>(fbxNode->GetNodeAttribute()); int polygonCount = fbxMesh->GetPolygonCount(); int indicesCount = polygonCount * 3; mesh->Positions.Data.reserve(indicesCount * 3); mesh->Indices.Data.reserve(indicesCount); mesh->Colors.Data.reserve(indicesCount * 3); for (int i = 0; i < polygonCount; ++i) { ASSERT(fbxMesh->GetPolygonSize(i) <= 3, "Error: triangulate %s", mesh->GetName()); for (int jj = 0; jj < 3; ++jj) { int ctrPointIdx = fbxMesh->GetPolygonVertex(i, jj); // TODO // Use Triangle Strip instead of triangle list auto position = fbxMesh->GetControlPointAt(ctrPointIdx); mesh->Positions.Data.push_back((double*)&position); int indices = i * 3 + jj; mesh->Indices.Data.push_back(indices); auto color = fbxMesh->GetElementVertexColor(ctrPointIdx); mesh->Colors.Data.push_back((double*)&color); } } mesh->UpdateBuffer(); return mesh; }
//-------------------------------------------------------------------------- void SaveMesh(FbxNode* pNode, const VeDirectoryPtr& spDest) noexcept { Mesh kMesh; FbxMesh* pMesh = (FbxMesh*)pNode->GetNodeAttribute(); kMesh.m_kName = pNode->GetName(); kMesh.m_stFaces = pMesh->GetPolygonCount(); kMesh.m_stVerts = kMesh.m_stFaces * 3; kMesh.m_kIndices.resize(kMesh.m_stVerts); kMesh.m_kPosition.resize(kMesh.m_stVerts); kMesh.m_kNormals.resize(pMesh->GetElementNormalCount()); for (auto& v : kMesh.m_kNormals) { v.resize(kMesh.m_stVerts); } kMesh.m_kTexcoords.resize(pMesh->GetElementUVCount()); for (auto& v : kMesh.m_kTexcoords) { v.resize(kMesh.m_stVerts); } kMesh.m_kColors.resize(pMesh->GetElementVertexColorCount()); for (auto& v : kMesh.m_kColors) { v.resize(kMesh.m_stVerts); } int element_mat = -1; for (int i(0); i < pMesh->GetElementMaterialCount(); ++i) { FbxGeometryElementMaterial* lMaterialElement = pMesh->GetElementMaterial(i); if (lMaterialElement->GetMappingMode() == FbxGeometryElement::eByPolygon) { element_mat = i; break; } } if (element_mat >= 0) { kMesh.m_kAttributes.resize(kMesh.m_stFaces); } FbxVector4* lControlPoints = pMesh->GetControlPoints(); for (int i(0); i < (int)(kMesh.m_stFaces); ++i) { int lPolygonSize = pMesh->GetPolygonSize(i); VE_ASSERT_ALWAYS(lPolygonSize == 3); for (int j(0); j < lPolygonSize; ++j) { uint32_t u32Index = i * 3 + j; kMesh.m_kIndices[u32Index] = u32Index; int lControlPointIndex = pMesh->GetPolygonVertex(i, j); auto& pos = kMesh.m_kPosition[u32Index]; pos.x = (float)lControlPoints[lControlPointIndex][0]; pos.y = (float)lControlPoints[lControlPointIndex][1]; pos.z = (float)lControlPoints[lControlPointIndex][2]; for (int k(0); k < (int)(kMesh.m_kColors.size()); ++k) { FbxColor c; FbxGeometryElementVertexColor* leVtxc = pMesh->GetElementVertexColor(k); switch (leVtxc->GetMappingMode()) { default: break; case FbxGeometryElement::eByControlPoint: switch (leVtxc->GetReferenceMode()) { case FbxGeometryElement::eDirect: c = leVtxc->GetDirectArray().GetAt(lControlPointIndex); break; case FbxGeometryElement::eIndexToDirect: { int id = leVtxc->GetIndexArray().GetAt(lControlPointIndex); c = leVtxc->GetDirectArray().GetAt(id); } break; default: break; // other reference modes not shown here! } break; case FbxGeometryElement::eByPolygonVertex: { switch (leVtxc->GetReferenceMode()) { case FbxGeometryElement::eDirect: c = leVtxc->GetDirectArray().GetAt(u32Index); break; case FbxGeometryElement::eIndexToDirect: { int id = leVtxc->GetIndexArray().GetAt(u32Index); c = leVtxc->GetDirectArray().GetAt(id); } break; default: break; // other reference modes not shown here! } } break; case FbxGeometryElement::eByPolygon: // doesn't make much sense for UVs case FbxGeometryElement::eAllSame: // doesn't make much sense for UVs case FbxGeometryElement::eNone: // doesn't make much sense for UVs break; } auto& color = kMesh.m_kColors[k][u32Index]; color.x = (float)c[0]; color.y = (float)c[1]; color.z = (float)c[2]; color.w = (float)c[3]; } for (int k(0); k < (int)(kMesh.m_kTexcoords.size()); ++k) { FbxVector2 uv; FbxGeometryElementUV* leUV = pMesh->GetElementUV(k); switch (leUV->GetMappingMode()) { default: break; case FbxGeometryElement::eByControlPoint: switch (leUV->GetReferenceMode()) { case FbxGeometryElement::eDirect: uv = leUV->GetDirectArray().GetAt(lControlPointIndex); break; case FbxGeometryElement::eIndexToDirect: { int id = leUV->GetIndexArray().GetAt(lControlPointIndex); uv = leUV->GetDirectArray().GetAt(id); } break; default: break; // other reference modes not shown here! } break; case FbxGeometryElement::eByPolygonVertex: { int lTextureUVIndex = pMesh->GetTextureUVIndex(i, j); switch (leUV->GetReferenceMode()) { case FbxGeometryElement::eDirect: case FbxGeometryElement::eIndexToDirect: { uv = leUV->GetDirectArray().GetAt(lTextureUVIndex); } break; default: break; // other reference modes not shown here! } } break; case FbxGeometryElement::eByPolygon: // doesn't make much sense for UVs case FbxGeometryElement::eAllSame: // doesn't make much sense for UVs case FbxGeometryElement::eNone: // doesn't make much sense for UVs break; } auto& texcoord = kMesh.m_kTexcoords[k][u32Index]; texcoord.x = (float)uv[0]; texcoord.y = (float)uv[1]; } for (int k(0); k < (int)(kMesh.m_kNormals.size()); ++k) { FbxVector4 n; FbxGeometryElementNormal* leNormal = pMesh->GetElementNormal(k); if (leNormal->GetMappingMode() == FbxGeometryElement::eByPolygonVertex) { switch (leNormal->GetReferenceMode()) { case FbxGeometryElement::eDirect: n = leNormal->GetDirectArray().GetAt(u32Index); break; case FbxGeometryElement::eIndexToDirect: { int id = leNormal->GetIndexArray().GetAt(u32Index); n = leNormal->GetDirectArray().GetAt(id); } break; default: break; // other reference modes not shown here! } } auto& normal = kMesh.m_kNormals[k][u32Index]; normal.x = (float)n[0]; normal.y = (float)n[1]; normal.z = (float)n[2]; } if (element_mat >= 0) { FbxGeometryElementMaterial* lMaterialElement = pMesh->GetElementMaterial(element_mat); FbxSurfaceMaterial* lMaterial = NULL; int lMatId = -1; lMaterial = pMesh->GetNode()->GetMaterial(lMaterialElement->GetIndexArray().GetAt(i)); lMatId = lMaterialElement->GetIndexArray().GetAt(i); kMesh.m_kAttributes[i] = lMatId; } } } kMesh.Process(); kMesh.Save(spDest); }