mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-10 09:48:32 +00:00
D4ve-R
192 lines
7.7 KiB
C++
192 lines
7.7 KiB
C++
/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#ifdef WITH_USD
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#include "USDSerializer.h"
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#include "pxr/base/gf/vec3f.h"
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#include "pxr/usd/usdGeom/xform.h"
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#include "pxr/usd/usdGeom/scope.h"
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#include "pxr/usd/usdGeom/tokens.h"
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#include "pxr/usd/usdGeom/metrics.h"
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#include "pxr/usd/usdLux/distantLight.h"
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#include "pxr/usd/usdShade/shader.h"
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#include "pxr/usd/usdShade/materialBindingAPI.h"
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#include <math.h>
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USDSerializer::USDSerializer(const std::string& out_filename, const SerializerSettings& settings):
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WriteOnlyGeometrySerializer(settings),
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filename_(out_filename)
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{
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std::size_t found = filename_.find_last_of("/\\");
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parent_path_ = filename_.substr(0, found != std::string::npos ? found + 1 : 0);
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stage_ = pxr::UsdStage::CreateNew(filename_);
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if(!stage_)
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throw std::runtime_error("Could not create USD stage");
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if(!settings.get(SerializerSettings::USE_Y_UP))
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pxr::UsdGeomSetStageUpAxis(stage_, pxr::UsdGeomTokens->z);
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pxr::UsdGeomSetStageMetersPerUnit(stage_, 1.0f);
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auto world = pxr::UsdGeomXform::Define(stage_, pxr::SdfPath("/World"));
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stage_->SetDefaultPrim(world.GetPrim());
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pxr::UsdGeomScope::Define(stage_, pxr::SdfPath("/Looks"));
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auto light = pxr::UsdLuxDistantLight::Define(stage_, pxr::SdfPath("/defaultLight"));
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light.CreateIntensityAttr().Set(1000.0f);
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light.CreateColorAttr().Set(pxr::GfVec3f(1.0f, 1.0f, 1.0f));
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ready_ = true;
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}
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USDSerializer::~USDSerializer() {
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}
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std::vector<pxr::UsdShadeMaterial> USDSerializer::createMaterials(const std::vector<IfcGeom::Material>& styles)
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{
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if(styles.empty())
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throw std::runtime_error("No styles to create materials from");
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std::vector<pxr::UsdShadeMaterial> materials {};
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for(auto style : styles) {
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std::string material_path(style.original_name());
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usd_utils::toPath(material_path);
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if(materials_.find(material_path) != materials_.end()) {
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materials.push_back(materials_[material_path]);
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continue;
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}
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const std::string path("/Looks/" + material_path);
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auto material = pxr::UsdShadeMaterial::Define(stage_, pxr::SdfPath(path));
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auto shader = pxr::UsdShadeShader::Define(stage_, pxr::SdfPath(path + "/Shader"));
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shader.CreateIdAttr().Set(pxr::TfToken("UsdPreviewSurface"));
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float rgba[4] { 0.18f, 0.18f, 0.18f, 1.0f };
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if (style.hasDiffuse())
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for (int i = 0; i < 3; ++i)
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rgba[i] = static_cast<float>(style.diffuse()[i]);
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shader.CreateInput(pxr::TfToken("diffuseColor"), pxr::SdfValueTypeNames->Color3f).Set(pxr::GfVec3f(rgba[0], rgba[1], rgba[2]));
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if(style.hasTransparency())
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rgba[3] -= style.transparency();
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shader.CreateInput(pxr::TfToken("opacity"), pxr::SdfValueTypeNames->Float).Set(rgba[3]);
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if(style.hasSpecular()) {
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for (int i = 0; i < 3; ++i)
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rgba[i] = static_cast<float>(style.specular()[i]);
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shader.CreateInput(pxr::TfToken("useSpecularWorkflow"), pxr::SdfValueTypeNames->Int).Set(1);
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} else {
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shader.CreateInput(pxr::TfToken("useSpecularWorkflow"), pxr::SdfValueTypeNames->Int).Set(0);
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}
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shader.CreateInput(pxr::TfToken("specularColor"), pxr::SdfValueTypeNames->Color3f).Set(pxr::GfVec3f(rgba[0], rgba[1], rgba[2]));
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material.CreateSurfaceOutput().ConnectToSource(shader.ConnectableAPI(), pxr::TfToken("surface"));
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materials.push_back(material);
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materials_[material_path] = material;
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}
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return materials;
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}
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pxr::GfVec3f USDSerializer::rotation_degrees_from_matrix(const std::vector<double>& matrix) const {
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const double epsilon = 1e-6;
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double angleX, angleY, angleZ;
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angleX = atan2(-matrix[5], matrix[8]);
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if (std::abs(std::abs(matrix[5]) - 1.0) < epsilon) {
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angleZ = 0.0;
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angleY = atan2(matrix[6], matrix[0]);
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} else {
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angleZ = atan2(matrix[1], matrix[4]);
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angleY = atan2(matrix[2], matrix[8]);
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}
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return pxr::GfVec3f(static_cast<float>(angleX * 180.0 / M_PI),
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static_cast<float>(angleY * 180.0 / M_PI),
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static_cast<float>(angleZ * 180.0 / M_PI));
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}
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void USDSerializer::writeHeader() {
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stage_->GetRootLayer()->SetComment("File generated by IfcOpenShell " + std::string(IFCOPENSHELL_VERSION));
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}
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void USDSerializer::write(const IfcGeom::TriangulationElement* o) {
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pxr::UsdGeomMesh usd_mesh;
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const IfcGeom::Representation::Triangulation& mesh = o->geometry();
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const auto verts = mesh.verts();
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const auto faces = mesh.faces();
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const auto material_ids = mesh.material_ids();
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const std::vector<double>& m = o->transformation().matrix().data();
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if (material_ids.empty() || verts.empty() || faces.empty())
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return;
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std::string name = o->name();
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const std::string type = o->type();
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const std::string id = std::to_string(o->id());
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if(name.empty()) {
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name = type + "_UnNamed_" + id;
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} else {
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name = type + "_" + usd_utils::toPath(name) + "_" + id;
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}
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usd_mesh = pxr::UsdGeomMesh::Define(stage_, pxr::SdfPath("/World/" + name));
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pxr::VtVec3fArray points;
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for(std::size_t i = 0; i < verts.size(); i+=3) {
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points.push_back(pxr::GfVec3f(static_cast<float>(verts[i]),
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static_cast<float>(verts[i+1]),
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static_cast<float>(verts[i+2])));
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}
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usd_mesh.CreatePointsAttr().Set(points);
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usd_mesh.CreateFaceVertexIndicesAttr().Set(usd_utils::toVtArray(faces));
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usd_mesh.CreateFaceVertexCountsAttr().Set(pxr::VtArray<int>((int) faces.size() / 3, 3));
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usd_mesh.AddTranslateOp().Set(pxr::GfVec3d(m[9], m[10], m[11]));
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usd_mesh.AddRotateXYZOp().Set(rotation_degrees_from_matrix(m));
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pxr::VtVec3fArray normals;
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for (std::vector<double>::const_iterator it = mesh.normals().begin(); it != mesh.normals().end();)
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normals.push_back(pxr::GfVec3f(static_cast<float>(*(it++)), static_cast<float>(*(it++)), static_cast<float>(*(it++))));
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usd_mesh.CreateNormalsAttr().Set(normals);
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auto materials = createMaterials(mesh.materials());
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pxr::UsdShadeMaterialBindingAPI material_api(usd_mesh);
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if(materials.size() > 1) {
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std::vector<pxr::VtArray<int>> subsets(materials.size());
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for(int i = 0; i < material_ids.size(); ++i)
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subsets[material_ids[i]].push_back(i);
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for(std::size_t i = 0; i < subsets.size(); ++i){
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auto subset = material_api.CreateMaterialBindSubset(pxr::TfToken("subset_" + std::to_string(i)), subsets[i]);
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pxr::UsdShadeMaterialBindingAPI(subset).Bind(materials[i]);
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}
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} else {
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material_api.Bind(materials[0]);
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}
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}
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void USDSerializer::finalize() {
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stage_->Save();
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}
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#endif // WITH_USD
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