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generates vmd script (tcl) that draw polygon on vmd from STL binary format file.
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/* Description: this program generates vmd script file (.tcl file) that draws * | |
* polygon structure on vmd from STL binary-format file. * | |
* * | |
* Licensing Terms : This code is licensed under the MIT License. * | |
* copyright (c) 2016 Toru Niina (niina.toru.68u@gmail.com) * | |
* all rights reserved. * | |
* * | |
* Permission is hereby granted, free of charge, to any person obtaining a copy * | |
* of this software and associated documentation files (the "Software"), to deal * | |
* in the Software without restriction, including without limitation the rights * | |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * | |
* copies of the Software, and to permit persons to whom the Software is * | |
* furnished to do so, subject to the following conditions: * | |
* * | |
* The above copyright notice and this permission notice shall be included in * | |
* all copies or substantial portions of the Software. * | |
* * | |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * | |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * | |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * | |
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * | |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * | |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * | |
* THE SOFTWARE. * | |
* */ | |
#include <iostream> | |
#include <fstream> | |
#include <string> | |
#include <stdexcept> | |
constexpr static std::size_t sizeof_uint = sizeof(unsigned int); | |
constexpr static std::size_t sizeof_float = sizeof(float); | |
struct position | |
{ | |
float x, y, z; | |
}; | |
struct triangle | |
{ | |
position a, b, c; | |
}; | |
std::ostream& operator<<(std::ostream& os, const position& pos) | |
{ | |
os << pos.x << " " << pos.y << " " << pos.z; | |
return os; | |
} | |
std::ostream& operator<<(std::ostream& os, const triangle& tri) | |
{ | |
os << "draw triangle {" << tri.a << "} {" | |
<< tri.b << "} {" << tri.c << "}" << std::endl; | |
return os; | |
} | |
position read_vector(std::ifstream& ifs) | |
{ | |
char *float0 = new char [sizeof_float]; | |
char *float1 = new char [sizeof_float]; | |
char *float2 = new char [sizeof_float]; | |
ifs.read(float0, sizeof_float); | |
ifs.read(float1, sizeof_float); | |
ifs.read(float2, sizeof_float); | |
const float x = *reinterpret_cast<float*>(float0); | |
const float y = *reinterpret_cast<float*>(float1); | |
const float z = *reinterpret_cast<float*>(float2); | |
delete [] float0; | |
delete [] float1; | |
delete [] float2; | |
return position{x, y, z}; | |
} | |
void read_triangle(std::ifstream& ifs) | |
{ | |
const position normal = read_vector(ifs); | |
std::cout << "# normal " << normal << std::endl; | |
const position A = read_vector(ifs); | |
const position B = read_vector(ifs); | |
const position C = read_vector(ifs); | |
triangle tri = {A, B, C}; | |
std::cout << tri << std::endl; | |
char *unused_data = new char [2]; | |
ifs.read(unused_data, 2); | |
delete [] unused_data; | |
return; | |
} | |
int main(int argc, char **argv) | |
{ | |
try | |
{ | |
if(argc != 2) | |
{ | |
std::cerr << "usage: ./stl2vmd [filename].stl (binary only) > vmd.tcl" << std::endl; | |
return 1; | |
} | |
const std::string filename = argv[1]; | |
std::ifstream stlfile(filename, std::ios::in | std::ios::binary); | |
if(!stlfile.good()) | |
throw std::runtime_error("file open error"); | |
std::cerr << "file reading start." << std::endl; | |
std::cout << "draw delete all" << std::endl; | |
stlfile.seekg(0, stlfile.end); | |
const std::size_t size_of_file = stlfile.tellg(); | |
stlfile.seekg(0, stlfile.beg); | |
std::cerr << "file size: " << size_of_file << std::endl; | |
char *ch_header = new char[81]; | |
stlfile.read(ch_header, 80); | |
ch_header[80] = '\0'; | |
const std::string header(ch_header); | |
delete [] ch_header; | |
std::cerr << "header : " << header << std::endl; | |
char *ch_numTriangle = new char [sizeof_uint]; | |
stlfile.read(ch_numTriangle, sizeof_uint); | |
const std::size_t num_Triangle = *reinterpret_cast<unsigned int*>(ch_numTriangle); | |
delete [] ch_numTriangle; | |
std::cerr << "# of face: " << num_Triangle << std::endl; | |
if(50 * num_Triangle + 80 + sizeof_uint != size_of_file) | |
{ | |
std::cerr << "file size must be 50 * number of triangle + 80 + 4" << std::endl; | |
std::cerr << " = " << 50 * num_Triangle + 80 + sizeof_uint << std::endl; | |
throw std::runtime_error("invalid filesize"); | |
} | |
for(std::size_t i=0; i < num_Triangle; ++i) | |
{ | |
read_triangle(stlfile); | |
} | |
return 0; | |
} | |
catch(std::exception& except) | |
{ | |
std::cerr << "exception thrown. what: " << except.what() << std::endl; | |
return 1; | |
} | |
} |
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