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- // txt2cmod.cpp
- //
- // Copyright (C) 2007, Chris Laurel <claurel@shatters.net>
- //
- // This program is free software; you can redistribute it and/or
- // modify it under the terms of the GNU General Public License
- // as published by the Free Software Foundation; either version 2
- // of the License, or (at your option) any later version.
- //
- // Convert a text file of vertices and facets from the Itokawa shape model
- // into an ASCII cmod for Celestia.
- //
- // These files have the form:
- //
- // <vertex count>
- //
- // <vertex id> <x> <y> <z>
- // ...
- //
- // <face count>
- //
- // <face id> <vertex0> <vertex1> <vertex2>
- // ...
- //
- // face and vertex ids are 1-based
- // vertex positions are floating point values
- //
- // The resulting cmod file should be processed by cmodfix to generate
- // normals and convert to the binary cmod format. I use this command line:
- //
- // cmodfix --normals --smooth 90 --weld --binary <input file> <output file>
- #include <iostream>
- using namespace std;
- int main(int argc, char* argv[])
- {
- // Write the cmod header
- cout << "#celmodel__asciinn";
- cout << "materialn";
- cout << "diffuse 1 1 1n";
- cout << "end_materialn";
- cout << "n";
- cout << "meshn";
- cout << "vertexdescn";
- cout << "position f3n";
- cout << "end_vertexdescn";
- cout << "n";
- // Get the vertex count
- unsigned int vertexCount;
- cin >> vertexCount;
- cout << "vertices " << vertexCount << "n";
- // Read the vertices
- for (unsigned int vertex = 0; vertex < vertexCount; vertex++)
- {
- unsigned int v;
- float x, y, z;
- cin >> v >> x >> y >> z;
- if (!cin.good())
- {
- cerr << "Error reading txt model at vertex " << vertex+1 << "n";
- exit(1);
- }
- cout << x << " " << y << " " << z << "n";
- }
- cout << "n";
- // Get the face count
- unsigned int faceCount;
- cin >> faceCount;
- cout << "trilist 0 " << faceCount * 3 << "n";
- // Read the faces
- for (unsigned int face = 0; face < faceCount; face++)
- {
- unsigned int f;
- unsigned int v0, v1, v2;
- cin >> f >> v0 >> v1 >> v2;
- if (!cin.good())
- {
- cerr << "Error reading txt model at face " << face + 1 << "n";
- exit(1);
- }
- // vertex indices in txt file are one based.
- cout << v0 - 1 << " " << v1 - 1 << " " << v2 - 1 << "n";
- }
- cout << "n";
- cout << "end_meshn";
- exit(0);
- return 0;
- }