tmp
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@ -23,7 +23,7 @@ add_example(windowfunc_ex OFF)
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add_example(legendre_ex OFF)
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add_example(refellipsoid_ex OFF)
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add_example(kde_ex OFF)
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add_example(meshio_ex ON)
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add_example(meshio_ex OFF)
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add_example(autodiff_ex OFF)
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add_example(multinary_ex OFF)
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add_example(text_io_ex OFF)
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@ -31,4 +31,5 @@ add_example(getoption_ex OFF)
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add_example(process_ex OFF)
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add_example(array_ex OFF)
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add_example(gmt_ex OFF)
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add_example(gnuplot_ex OFF)
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add_example(gnuplot_ex OFF)
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add_example(stl_io_ex OFF)
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50
example/stl_io_ex.cpp
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50
example/stl_io_ex.cpp
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@ -0,0 +1,50 @@
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/********************************************************
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* ██████╗ ██████╗████████╗██╗
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* ██╔════╝ ██╔════╝╚══██╔══╝██║
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* ██║ ███╗██║ ██║ ██║
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* ██║ ██║██║ ██║ ██║
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* ╚██████╔╝╚██████╗ ██║ ███████╗
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* ╚═════╝ ╚═════╝ ╚═╝ ╚══════╝
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* Geophysical Computational Tools & Library (GCTL)
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*
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* Copyright (c) 2023 Yi Zhang (yizhang-geo@zju.edu.cn)
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*
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* GCTL is distributed under a dual licensing scheme. You can redistribute
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* it and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, either version 2
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* of the License, or (at your option) any later version. You should have
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* received a copy of the GNU Lesser General Public License along with this
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* program. If not, see <http://www.gnu.org/licenses/>.
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*
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* If the terms and conditions of the LGPL v.2. would prevent you from using
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* the GCTL, please consider the option to obtain a commercial license for a
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* fee. These licenses are offered by the GCTL's original author. As a rule,
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* licenses are provided "as-is", unlimited in time for a one time fee. Please
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* send corresponding requests to: yizhang-geo@zju.edu.cn. Please do not forget
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* to include some description of your company and the realm of its activities.
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* Also add information on how to contact you by electronic and paper mail.
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******************************************************/
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#include "../lib/core.h"
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#include "../lib/io.h"
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using namespace gctl;
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int main(int argc, char const *argv[]) try
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{
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array<vertex3dc> nodes;
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array<triangle> tris;
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read_stl_ascii("tmp/Stanford_Bunny", nodes, tris);
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mesh_io mshio;
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mshio.import_from(tris, nodes);
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mshio.save_gmsh_v2_ascii("tmp");
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mshio.info();
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save_stl_ascii("tmp", nodes, tris, "Stanford_Bunny");
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return 0;
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}
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catch(std::exception &e)
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{
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GCTL_ShowWhatError(e.what(), GCTL_ERROR_ERROR, 0, 0, 0);
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}
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1
lib/io.h
1
lib/io.h
@ -38,5 +38,6 @@
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#include "io/tetgen_io.h"
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#include "io/triangle_io.h"
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#include "io/off_io.h"
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#include "io/stl_io.h"
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#endif // _GCTL_IO_H
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158
lib/io/stl_io.h
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158
lib/io/stl_io.h
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@ -0,0 +1,158 @@
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/********************************************************
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* ██████╗ ██████╗████████╗██╗
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* ██╔════╝ ██╔════╝╚══██╔══╝██║
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* ██║ ███╗██║ ██║ ██║
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* ██║ ██║██║ ██║ ██║
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* ╚██████╔╝╚██████╗ ██║ ███████╗
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* ╚═════╝ ╚═════╝ ╚═╝ ╚══════╝
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* Geophysical Computational Tools & Library (GCTL)
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*
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* Copyright (c) 2023 Yi Zhang (yizhang-geo@zju.edu.cn)
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*
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* GCTL is distributed under a dual licensing scheme. You can redistribute
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* it and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, either version 2
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* of the License, or (at your option) any later version. You should have
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* received a copy of the GNU Lesser General Public License along with this
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* program. If not, see <http://www.gnu.org/licenses/>.
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*
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* If the terms and conditions of the LGPL v.2. would prevent you from using
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* the GCTL, please consider the option to obtain a commercial license for a
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* fee. These licenses are offered by the GCTL's original author. As a rule,
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* licenses are provided "as-is", unlimited in time for a one time fee. Please
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* send corresponding requests to: yizhang-geo@zju.edu.cn. Please do not forget
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* to include some description of your company and the realm of its activities.
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* Also add information on how to contact you by electronic and paper mail.
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******************************************************/
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#ifndef _GCTL_STL_IO_H
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#define _GCTL_STL_IO_H
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// library's head file
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#include "../core.h"
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#include "../utility.h"
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#include "../geometry.h"
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namespace gctl
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{
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template <typename E, typename A>
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void read_stl_ascii(std::string filename, array<vertex<point3dc, E>> &nodes,
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array<type_triangle<A>> &facets, std::string solid = "null", double eps = 1e-8)
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{
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std::ifstream infile;
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open_infile(infile, filename, ".stl");
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vertex3dc tmp_node;
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std::vector<vertex3dc> tmp_nodes;
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_1i_vector one_tri(3);
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_2i_vector tmp_tris;
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bool inside_solid, new_node;
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point3dc nor, vt[3];
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char solid_name[256], solid_endname[256];
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std::string line;
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while (std::getline(infile, line))
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{
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if (sscanf(line.c_str(), "solid %s", solid_name) == 1 && (!strcmp(solid_name, solid.c_str()) || solid == "null"))
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{
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inside_solid = true;
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while (inside_solid)
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{
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std::getline(infile, line);
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if (sscanf(line.c_str(), "endsolid %s", solid_endname) == 1)
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{
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if (strcmp(solid_endname, solid_name))
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throw std::runtime_error("[gctl::read_stl_ascii] Invalid solid names.");
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inside_solid = false;
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}
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else
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{
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sscanf(line.c_str(), "facet normal %lf %lf %lf", &nor.x, &nor.y, &nor.z);
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std::getline(infile, line); // outer loop
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for (int i = 0; i < 3; i++)
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{
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std::getline(infile, line);
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line.erase(0, line.find_first_not_of(" \t"));
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line.erase(line.find_last_not_of(" \t") + 1);
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sscanf(line.c_str(), "vertex %lf %lf %lf", &vt[i].x, &vt[i].y, &vt[i].z);
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}
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std::getline(infile, line); // endloop
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std::getline(infile, line); // endfacet
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for (size_t i = 0; i < 3; i++)
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{
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tmp_node.id = tmp_nodes.size();
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tmp_node.x = vt[i].x;
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tmp_node.y = vt[i].y;
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tmp_node.z = vt[i].z;
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new_node = true;
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for (size_t v = 0; v < tmp_nodes.size(); v++)
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{
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if (isequal(tmp_nodes[v], tmp_node, eps))
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{
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tmp_node.id = tmp_nodes[v].id;
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new_node = false;
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break;
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}
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}
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if (new_node) tmp_nodes.push_back(tmp_node);
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one_tri[i] = tmp_node.id;
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}
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tmp_tris.push_back(one_tri);
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}
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}
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}
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}
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infile.close();
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nodes.resize(tmp_nodes.size());
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for (size_t i = 0; i < tmp_nodes.size(); i++)
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{
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nodes[i].id = tmp_nodes[i].id;
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nodes[i].x = tmp_nodes[i].x;
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nodes[i].y = tmp_nodes[i].y;
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nodes[i].z = tmp_nodes[i].z;
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}
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facets.resize(tmp_tris.size());
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for (size_t i = 0; i < tmp_tris.size(); i++)
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{
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facets[i].set(nodes[tmp_tris[i][0]], nodes[tmp_tris[i][1]], nodes[tmp_tris[i][2]], i);
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}
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destroy_vector(tmp_nodes);
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destroy_vector(tmp_tris);
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destroy_vector(one_tri);
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return;
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}
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template <typename E, typename A>
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void save_stl_ascii(std::string filename, const array<vertex<point3dc, E>> &nodes,
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const array<type_triangle<A>> &facets, std::string solid)
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{
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std::ofstream outfile;
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open_outfile(outfile, filename, ".stl");
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point3dc nor;
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outfile << "solid " << solid << "\n";
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for (size_t i = 0; i < facets.size(); i++)
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{
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nor = cross(*facets[i].vert[1] - *facets[i].vert[0], *facets[i].vert[2] - *facets[i].vert[0]).normal();
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outfile << "facet normal " << nor.x << " " << nor.y << " " << nor.z << "\n";
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outfile << " outer loop\n";
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outfile << " vertex " << facets[i].vert[0]->x << " " << facets[i].vert[0]->y << " " << facets[i].vert[0]->z << "\n";
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outfile << " vertex " << facets[i].vert[1]->x << " " << facets[i].vert[1]->y << " " << facets[i].vert[1]->z << "\n";
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outfile << " vertex " << facets[i].vert[2]->x << " " << facets[i].vert[2]->y << " " << facets[i].vert[2]->z << "\n";
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outfile << " endloop\n";
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outfile << "endfacet\n";
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}
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outfile << "endsolid " << solid << "\n";
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outfile.close();
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return;
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}
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};
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#endif // _GCTL_STL_IO_H
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