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67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
#pragma once
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// Copyright (c) 2024-2026 Tarik Moussa.
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// SPDX-License-Identifier: MIT
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// mesh_io.hpp
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//
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// Phase 4b — CGAL::IO wrappers for ConformalMesh.
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//
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// Reads and writes ConformalMesh (CGAL::Surface_mesh) in standard polygon-mesh
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// formats using the CGAL Polygon Mesh I/O utilities (CGAL 5.4+).
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//
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// Supported formats (detected by file extension):
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// .off — Object File Format (read + write)
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// .obj — Wavefront OBJ (read + write)
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// .ply — Polygon File Format (read + write)
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//
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// Usage:
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// ConformalMesh mesh;
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// if (!read_mesh("input.off", mesh)) throw std::runtime_error("read failed");
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// // ... process mesh ...
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// write_mesh("output.off", mesh);
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//
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// Note: property maps (lambda0, v_idx, etc.) are NOT serialised — they must
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// be re-initialised with setup_*_maps() + compute_lambda0_from_mesh() after
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// reading a file.
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#include "conformal_mesh.hpp"
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#include <CGAL/IO/polygon_mesh_io.h>
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#include <string>
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#include <stdexcept>
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namespace conformallab {
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/// Read a polygon mesh from `filename` into `mesh` (clears existing content).
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/// Returns `true` on success, `false` on failure.
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inline bool read_mesh(const std::string& filename, ConformalMesh& mesh)
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{
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mesh.clear();
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return CGAL::IO::read_polygon_mesh(filename, mesh);
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}
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/// Write `mesh` to `filename`. Returns `true` on success.
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inline bool write_mesh(const std::string& filename, const ConformalMesh& mesh)
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{
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return CGAL::IO::write_polygon_mesh(filename, mesh);
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}
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/// Throwing wrapper around `read_mesh`: returns the mesh by value
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/// or throws `std::runtime_error` on read failure.
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inline ConformalMesh load_mesh(const std::string& filename)
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{
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ConformalMesh mesh;
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if (!read_mesh(filename, mesh))
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throw std::runtime_error("conformallab: failed to read mesh from " + filename);
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return mesh;
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}
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/// Throwing wrapper around `write_mesh`; throws `std::runtime_error` on
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/// write failure.
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inline void save_mesh(const std::string& filename, const ConformalMesh& mesh)
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{
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if (!write_mesh(filename, mesh))
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throw std::runtime_error("conformallab: failed to write mesh to " + filename);
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}
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} // namespace conformallab
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