Dump of hello world ifc viewer code

src/ifcviewer/GeometryStreamer.h

@@ -0,0 +1,89 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef GEOMETRYSTREAMER_H
+#define GEOMETRYSTREAMER_H
+
+#include <QObject>
+#include <QThread>
+
+#include <string>
+#include <vector>
+#include <atomic>
+#include <functional>
+#include <memory>
+#include <mutex>
+#include <deque>
+
+#include "../ifcparse/IfcFile.h"
+#include "../ifcgeom/Iterator.h"
+
+#include "ViewportWindow.h"
+
+struct ElementInfo {
+    uint32_t object_id;
+    int ifc_id;
+    std::string guid;
+    std::string name;
+    std::string type;
+    int parent_id;
+};
+
+class GeometryStreamer : public QObject {
+    Q_OBJECT
+public:
+    explicit GeometryStreamer(QObject* parent = nullptr);
+    ~GeometryStreamer();
+
+    void loadFile(const std::string& path, int num_threads = 0);
+    void cancel();
+
+    bool isRunning() const { return running_.load(); }
+    int progress() const { return progress_.load(); }
+
+    IfcParse::IfcFile* ifcFile() const { return ifc_file_.get(); }
+
+    // Thread-safe access to discovered elements
+    std::vector<ElementInfo> drainElements();
+
+signals:
+    void progressChanged(int percent);
+    void elementReady(UploadChunk chunk);
+    void finished();
+    void errorOccurred(const QString& message);
+
+private:
+    void run(const std::string& path, int num_threads);
+
+    UploadChunk convertElement(const IfcGeom::TriangulationElement* elem, uint32_t object_id);
+
+    std::unique_ptr<IfcParse::IfcFile> ifc_file_;
+    std::unique_ptr<QThread> worker_thread_;
+    std::atomic<bool> running_{false};
+    std::atomic<bool> cancel_requested_{false};
+    std::atomic<int> progress_{0};
+
+    std::mutex elements_mutex_;
+    std::vector<ElementInfo> pending_elements_;
+
+    // Map from IFC product id to our compact object_id
+    uint32_t next_object_id_ = 1; // 0 = no object
+};
+
+#endif // GEOMETRYSTREAMER_H