[2961] | 1 | #include "ObjConverter.h"
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[3012] | 2 | #include "SimpleTri.h"
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| 3 | #include "SimpleVec.h"
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[2961] | 4 | #include "gzstream.h"
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| 5 | #include <iostream>
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| 6 |
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| 7 |
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| 8 | using namespace std;
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| 9 |
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[3146] | 10 | //#define USE_TEXTURE
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[2961] | 11 |
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[3146] | 12 |
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[2961] | 13 | static void LoadIndices(char *str,
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| 14 | const VertexArray &vertices,
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| 15 | const VertexArray &normals,
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| 16 | const vector<pair<float, float> > &texcoords,
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| 17 | VertexArray &faceVertices,
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| 18 | VertexArray &faceNormals,
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| 19 | vector<Texcoord> &faceTexcoords
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| 20 | )
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| 21 | {
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[3146] | 22 | vector<string> triples;
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[2961] | 23 |
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| 24 | char *next_token;
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| 25 |
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| 26 | // extract the triples of the form v/t/n v/t/n ...
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| 27 | char *pch = strtok_s(str + 1, " ", &next_token);
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| 28 |
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[3146] | 29 | while (pch)
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[2961] | 30 | {
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[3146] | 31 | string s(pch);
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| 32 | //s += "\n",
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| 33 | triples.push_back(s);
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| 34 |
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[2961] | 35 | pch = strtok_s(NULL, " ", &next_token);
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| 36 | }
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| 37 |
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| 38 | vector<int> indices;
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| 39 | vector<int> nIndices;
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| 40 | vector<int> tIndices;
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| 41 |
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[3146] | 42 | char seps[] = " /\t\n";
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| 43 |
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| 44 | for (size_t i = 0; i < triples.size(); ++ i)
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[2961] | 45 | {
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[3146] | 46 | static int dummy = 0;
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| 47 |
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| 48 | size_t found;
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| 49 | found = triples[i].find_first_of(seps);
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| 50 | size_t prevfound = 0;
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[3012] | 51 | // vertex, normal, texture indices
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[3146] | 52 | string str = triples[i].substr(prevfound, found);
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[2961] | 53 |
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[3146] | 54 | int index = (int)strtol(str.c_str(), NULL, 10) - 1;
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| 55 |
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[2963] | 56 | int tIndex = index;
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[3146] | 57 | int nIndex = index;
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| 58 |
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| 59 | prevfound = found;
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| 60 | found = triples[i].find_first_of(seps, found + 1);
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[2963] | 61 |
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[3146] | 62 | if (found != string::npos)
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| 63 | {
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| 64 | str = triples[i].substr(prevfound, found);
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[2961] | 65 |
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[3146] | 66 | int idx = (int)strtol(str.c_str(), NULL, 10) - 1;
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| 67 | if (idx > 0) tIndex = idx;
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[3012] | 68 | }
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| 69 |
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[3146] | 70 | if ((found + 1) < triples[i].size())
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[3012] | 71 | {
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[3146] | 72 | str = triples[i].substr(found + 1);
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| 73 |
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| 74 | int idx = (int)strtol(str.c_str(), NULL, 10) - 1;
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| 75 | if (idx > 0) nIndex = idx;
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[3012] | 76 | }
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| 77 |
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[2961] | 78 | // store indices
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| 79 | if (index >= 0)
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| 80 | {
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| 81 | indices.push_back(index);
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| 82 | nIndices.push_back(nIndex);
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| 83 | tIndices.push_back(tIndex);
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| 84 | }
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| 85 |
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| 86 | // new triangle found
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| 87 | if (indices.size() > 2)
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| 88 | {
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[3076] | 89 | // change orientation of faces?
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[3059] | 90 | #if 1
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[2961] | 91 | int idx1 = 0;
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| 92 | int idx2 = (int)indices.size() - 2;
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| 93 | int idx3 = (int)indices.size() - 1;
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| 94 | #else
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| 95 | int idx3 = 0;
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| 96 | int idx2 = (int)indices.size() - 2;
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| 97 | int idx1 = (int)indices.size() - 1;
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| 98 | #endif
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| 99 | faceVertices.push_back(vertices[indices[idx1]]);
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| 100 | faceVertices.push_back(vertices[indices[idx2]]);
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| 101 | faceVertices.push_back(vertices[indices[idx3]]);
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[2963] | 102 |
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[3146] | 103 |
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[3012] | 104 | if (!normals.empty())
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| 105 | {
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[3146] | 106 | //if (dummy < 3) cout << nIndices[idx1] << " " << nIndices[idx2] << " " << nIndices[idx3] << endl;
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[3012] | 107 | faceNormals.push_back(normals[nIndices[idx1]]);
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| 108 | faceNormals.push_back(normals[nIndices[idx2]]);
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| 109 | faceNormals.push_back(normals[nIndices[idx3]]);
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| 110 | }
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| 111 | else
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| 112 | {
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[3146] | 113 | // no face normals? => create normals
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| 114 | const SimpleTri tri(vertices[indices[idx1]],
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| 115 | vertices[indices[idx2]],
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| 116 | vertices[indices[idx3]]);
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[3012] | 117 | const SimpleVec n = tri.GetNormal();
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[2963] | 118 |
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[3012] | 119 | faceNormals.push_back(n);
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| 120 | faceNormals.push_back(n);
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| 121 | faceNormals.push_back(n);
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| 122 | }
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[2961] | 123 |
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[3146] | 124 | ++ dummy;
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[3012] | 125 | if (!texcoords.empty())
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| 126 | {
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| 127 | faceTexcoords.push_back(texcoords[tIndices[idx1]]);
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| 128 | faceTexcoords.push_back(texcoords[tIndices[idx2]]);
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| 129 | faceTexcoords.push_back(texcoords[tIndices[idx3]]);
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| 130 | }
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[2961] | 131 | }
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| 132 | }
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| 133 | }
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| 134 |
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| 135 |
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| 136 | ObjConverter::ObjConverter()
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| 137 | {}
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| 138 |
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| 139 |
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| 140 | ObjConverter::~ObjConverter()
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| 141 | {
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| 142 | for (size_t i = 0; i < mGeometry.size(); ++ i)
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| 143 | {
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| 144 | delete [] mGeometry[i]->mVertices;
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| 145 | delete [] mGeometry[i]->mNormals;
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| 146 | delete [] mGeometry[i]->mTexcoords;
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| 147 |
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| 148 | delete mGeometry[i];
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| 149 | }
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| 150 |
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| 151 | mGeometry.clear();
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| 152 | }
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| 153 |
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| 154 |
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| 155 | void ObjConverter::LoadShape(const VertexArray &faceVertices,
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| 156 | const VertexArray &faceNormals,
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| 157 | const vector<Texcoord> &faceTexcoords)
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| 158 | {
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| 159 | int numElements = (int)faceVertices.size();
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| 160 | Geometry *geom = new Geometry();
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| 161 |
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| 162 | // convert the triangles to geometry
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[3012] | 163 | geom->mVertices = new SimpleVec[numElements];
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| 164 | geom->mNormals = new SimpleVec[numElements];
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[2961] | 165 | geom->mTexcoords = new Texcoord[numElements];
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| 166 |
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| 167 | geom->mVertexCount = numElements;
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| 168 | geom->mTexcoordCount = (int)faceTexcoords.size();
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| 169 |
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| 170 | cout << "number of vertices=" << numElements << endl;
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| 171 |
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| 172 | for (int i = 0; i < numElements; ++ i)
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| 173 | {
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[3161] | 174 | #if 0
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[3076] | 175 | // convert to our camera system: change y and z
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[2961] | 176 | geom->mVertices[i].x = faceVertices[i].x;
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| 177 | geom->mVertices[i].y = -faceVertices[i].z;
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| 178 | geom->mVertices[i].z = faceVertices[i].y;
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[3012] | 179 |
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[2961] | 180 | geom->mNormals[i].x = faceNormals[i].x;
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| 181 | geom->mNormals[i].y = -faceNormals[i].z;
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| 182 | geom->mNormals[i].z = faceNormals[i].y;
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[3146] | 183 |
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[3012] | 184 | #else
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| 185 | geom->mVertices[i].x = faceVertices[i].x;
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| 186 | geom->mVertices[i].y = faceVertices[i].y;
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| 187 | geom->mVertices[i].z = faceVertices[i].z;
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| 188 |
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| 189 | geom->mNormals[i].x = faceNormals[i].x;
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| 190 | geom->mNormals[i].y = faceNormals[i].y;
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| 191 | geom->mNormals[i].z = faceNormals[i].z;
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[2961] | 192 |
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[3012] | 193 | #endif
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[3089] | 194 |
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[2965] | 195 | if (i < geom->mTexcoordCount)
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[2963] | 196 | {
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| 197 | geom->mTexcoords[i].first = faceTexcoords[i].first;
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| 198 | geom->mTexcoords[i].second = faceTexcoords[i].second;
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| 199 | }
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[2961] | 200 | }
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| 201 |
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| 202 | mGeometry.push_back(geom);
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| 203 | }
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| 204 |
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| 205 |
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| 206 | bool ObjConverter::Convert(const string &filename, const std::string &outputFilename)
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| 207 | {
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| 208 | mNumShapes = 0;
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| 209 |
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| 210 | for (size_t i = 0; i < mGeometry.size(); ++ i)
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| 211 | {
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| 212 | delete [] mGeometry[i]->mVertices;
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| 213 | delete [] mGeometry[i]->mNormals;
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| 214 | delete [] mGeometry[i]->mTexcoords;
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| 215 |
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| 216 | delete mGeometry[i];
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| 217 | }
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| 218 |
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| 219 | mGeometry.clear();
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| 220 |
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| 221 | if (!ReadFile(filename))
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| 222 | {
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| 223 | cerr << "could not read file" << endl;
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| 224 | return false;
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| 225 | }
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| 226 |
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| 227 | if (!WriteFile(outputFilename))
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| 228 | {
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| 229 | cerr << "could not write file" << endl;
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| 230 | return false;
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| 231 | }
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| 232 |
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| 233 |
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| 234 | return true;
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| 235 | }
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| 236 |
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| 237 |
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| 238 | bool ObjConverter::ReadFile(const string &filename)
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| 239 | {
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| 240 | FILE *file;
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| 241 |
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| 242 | if ((file = fopen(filename.c_str(), "r")) == NULL)
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| 243 | {
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| 244 | return false;
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| 245 | }
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| 246 |
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| 247 | VertexArray faceVertices;
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| 248 | VertexArray faceNormals;
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| 249 | vector<Texcoord> faceTexcoords;
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| 250 |
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| 251 | VertexArray vertices;
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| 252 | VertexArray normals;
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| 253 | vector<Texcoord> texcoords;
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| 254 |
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| 255 | vector<int> indices;
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| 256 |
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| 257 | int line = 0;
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| 258 | const int len = 10000;
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| 259 | char str[len];
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| 260 |
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| 261 | while (fgets(str, len, file) != NULL)
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| 262 | {
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[3146] | 263 | switch (str[0])
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[2961] | 264 | {
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| 265 | case 'v': // vertex or normal
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| 266 | {
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| 267 | float x, y, z;
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| 268 |
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| 269 | switch (str[1])
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| 270 | {
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| 271 | case 'n' :
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| 272 | sscanf(str + 2, "%f %f %f", &x, &y, &z);
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[3012] | 273 | normals.push_back(SimpleVec(x, y, z));
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[2961] | 274 | break;
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| 275 | case 't':
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| 276 | sscanf(str + 2, "%f %f", &x, &y);
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| 277 | texcoords.push_back(pair<float, float>(x, y));
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| 278 | break;
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| 279 | default:
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| 280 | sscanf(str + 1, "%f %f %f", &x, &y, &z);
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[3161] | 281 | //const float scale = 5e-3f;
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| 282 | const float scale = 1.0f;
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[3146] | 283 | vertices.push_back(SimpleVec(x * scale, y * scale, z* scale));
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[2961] | 284 | //cout <<"v " << x << " " << y << " "<< z << " ";
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| 285 | }
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| 286 | break;
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| 287 | }
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| 288 | case 'f':
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| 289 | {
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| 290 | //////////
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| 291 | //-- indices in the current line
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| 292 |
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| 293 | LoadIndices(str,
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| 294 | vertices, normals, texcoords,
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| 295 | faceVertices, faceNormals, faceTexcoords);
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| 296 |
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[3012] | 297 | if (0 &&
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| 298 | (((line % 1000) == 999) && !faceVertices.empty()))
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[2963] | 299 | {
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| 300 | ++ mNumShapes;
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| 301 |
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| 302 | LoadShape(faceVertices, faceNormals, faceTexcoords);
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| 303 |
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| 304 | faceVertices.clear();
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| 305 | faceNormals.clear();
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| 306 | faceTexcoords.clear();
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| 307 | }
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| 308 |
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[2961] | 309 | break;
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| 310 | } // end face
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[3076] | 311 | case 'g': // load a new shape
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[2961] | 312 | {/*
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| 313 | if (!faceVertices.empty())
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| 314 | {
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| 315 | ++ mNumShapes;
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| 316 |
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| 317 | LoadShape(faceVertices, faceNormals, faceTexcoords);
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| 318 |
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| 319 | faceVertices.clear();
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| 320 | faceNormals.clear();
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| 321 | faceTexcoords.clear();
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| 322 | }*/
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| 323 | }
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| 324 | break;
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| 325 | default:
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[3146] | 326 | // throw away line
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[2961] | 327 | break;
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| 328 | }
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| 329 |
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| 330 | ++ line;
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| 331 | }
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| 332 |
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| 333 | if (!faceVertices.empty())
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| 334 | {
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| 335 | ++ mNumShapes;
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| 336 |
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| 337 | LoadShape(faceVertices, faceNormals, faceTexcoords);
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| 338 |
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| 339 | faceVertices.clear();
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| 340 | faceNormals.clear();
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| 341 | faceTexcoords.clear();
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| 342 | }
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| 343 |
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| 344 | fclose(file);
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| 345 |
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| 346 | return true;
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| 347 | }
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| 348 |
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| 349 |
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| 350 | void ObjConverter::WriteGeometry(ogzstream &str, Geometry *geom)
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| 351 | {
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| 352 | int vertexCount = geom->mVertexCount;
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| 353 | str.write(reinterpret_cast<char *>(&vertexCount), sizeof(int));
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| 354 |
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[3012] | 355 | str.write(reinterpret_cast<char *>(geom->mVertices), sizeof(SimpleVec) * vertexCount);
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| 356 | str.write(reinterpret_cast<char *>(geom->mNormals), sizeof(SimpleVec) * vertexCount);
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[2961] | 357 |
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| 358 | int texCoordCount = geom->mTexcoordCount;
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| 359 | str.write(reinterpret_cast<char *>(&texCoordCount), sizeof(int));
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| 360 |
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| 361 | if (texCoordCount)
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| 362 | str.write(reinterpret_cast<char *>(geom->mTexcoords), sizeof(float) * texCoordCount * 2);
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| 363 |
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| 364 |
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| 365 | ///////
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| 366 | //-- texture
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| 367 |
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[3146] | 368 | #ifdef USE_TEXTURE
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[3089] | 369 | int texId = 0;
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[3146] | 370 | #else
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| 371 | int texId = -1;
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| 372 | #endif
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| 373 |
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[2961] | 374 | str.write(reinterpret_cast<char *>(&texId), sizeof(int));
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| 375 |
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| 376 | bool alphaTestEnabled = false;
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[3146] | 377 | //bool cullFaceEnabled = false;
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| 378 | bool cullFaceEnabled = true;
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[2961] | 379 |
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| 380 | str.write(reinterpret_cast<char *>(&alphaTestEnabled), sizeof(bool));
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| 381 | str.write(reinterpret_cast<char *>(&cullFaceEnabled), sizeof(bool));
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| 382 |
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| 383 | // material
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[3076] | 384 | bool hasMaterial = true;
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| 385 | //bool hasMaterial = false;
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[2961] | 386 | str.write(reinterpret_cast<char *>(&hasMaterial), sizeof(bool));
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| 387 |
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| 388 | if (hasMaterial)
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| 389 | {
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[3128] | 390 | SimpleVec ambient, diffuse, spec, emm;
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[2961] | 391 |
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| 392 | ambient.x = ambient.y = ambient.z = 0.2f;
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[3161] | 393 | //diffuse.x = diffuse.y = diffuse.z = 1.0f;
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| 394 | diffuse.x = 0.7f; diffuse.y = 0.5f; diffuse.z = 0.2f;
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[3146] | 395 | spec.x = spec.y = spec.z = .0f;
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[3128] | 396 | emm = spec;
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[2961] | 397 |
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| 398 | // only write rgb part of the material
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[3012] | 399 | str.write(reinterpret_cast<char *>(&ambient), sizeof(SimpleVec));
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| 400 | str.write(reinterpret_cast<char *>(&diffuse), sizeof(SimpleVec));
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[3128] | 401 | str.write(reinterpret_cast<char *>(&spec), sizeof(SimpleVec));
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| 402 | str.write(reinterpret_cast<char *>(&emm), sizeof(SimpleVec));
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[2961] | 403 | }
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| 404 | }
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| 405 |
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| 406 |
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| 407 | bool ObjConverter::WriteFile(const string &filename)
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| 408 | {
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| 409 | ogzstream ofile(filename.c_str());
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| 410 |
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| 411 | if (!ofile.is_open())
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| 412 | return false;
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| 413 |
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| 414 |
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| 415 | /////////
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| 416 | //-- write textures
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| 417 |
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[3146] | 418 | #ifdef USE_TEXTURE
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[3089] | 419 | int textureCount = 1;
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[3146] | 420 | #else
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| 421 | int textureCount = 0;
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| 422 | #endif
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[2961] | 423 | ofile.write(reinterpret_cast<char *>(&textureCount), sizeof(int));
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| 424 |
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| 425 | if (textureCount > 0)
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| 426 | {
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[3076] | 427 | // hack
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[2961] | 428 | const string texName("wood.jpg");
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| 429 |
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| 430 | int texnameSize = (int)texName.length() + 1;
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| 431 | ofile.write(reinterpret_cast<char *>(&texnameSize), sizeof(int));
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| 432 |
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| 433 | ofile.write(texName.c_str(), sizeof(char) * texnameSize);
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| 434 |
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[3089] | 435 | int boundS = 1, boundT = 1;
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[2961] | 436 |
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| 437 | ofile.write(reinterpret_cast<char *>(&boundS), sizeof(int));
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| 438 | ofile.write(reinterpret_cast<char *>(&boundT), sizeof(int));
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| 439 | }
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| 440 |
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| 441 |
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| 442 | ///////////
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| 443 | //-- write shapes
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| 444 |
|
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| 445 | ofile.write(reinterpret_cast<char *>(&mNumShapes), sizeof(int));
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| 446 |
|
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| 447 | vector<Geometry *>::const_iterator it, it_end = mGeometry.end();
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| 448 |
|
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| 449 | for (it = mGeometry.begin(); it != it_end; ++ it)
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| 450 | {
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| 451 | WriteGeometry(ofile, *it);
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| 452 | }
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| 453 |
|
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| 454 |
|
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| 455 | int entityCount = 1;
|
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| 456 | ofile.write(reinterpret_cast<char *>(&entityCount), sizeof(int));
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| 457 |
|
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| 458 |
|
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| 459 | //////////
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| 460 | //-- write single scene entity
|
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| 461 |
|
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| 462 | // no transformation
|
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| 463 | bool hasTrafo = false;
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| 464 | ofile.write(reinterpret_cast<char *>(&hasTrafo), sizeof(bool));
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| 465 |
|
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| 466 | // a dummy lod
|
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| 467 | int numLODs = 1;
|
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| 468 | ofile.write(reinterpret_cast<char *>(&numLODs), sizeof(int));
|
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| 469 |
|
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| 470 | float dist = 0;
|
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| 471 | ofile.write(reinterpret_cast<char *>(&dist), sizeof(float));
|
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| 472 |
|
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| 473 | ofile.write(reinterpret_cast<char *>(&mNumShapes), sizeof(int));
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| 474 |
|
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| 475 | // all shapes belong to this scene entity
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| 476 | for (int i = 0; i < mNumShapes; ++ i)
|
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| 477 | {
|
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| 478 | int shapeId = i;
|
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| 479 | ofile.write(reinterpret_cast<char *>(&shapeId), sizeof(int));
|
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| 480 | }
|
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| 481 |
|
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| 482 | return true;
|
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| 483 | } |
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