[2961] | 1 | #include "ObjConverter.h"
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| 2 | #include "gzstream.h"
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| 3 | #include <iostream>
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| 4 |
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| 5 |
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| 6 | using namespace std;
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| 7 |
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| 8 |
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| 9 | static void LoadIndices(char *str,
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| 10 | const VertexArray &vertices,
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| 11 | const VertexArray &normals,
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| 12 | const vector<pair<float, float> > &texcoords,
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| 13 | VertexArray &faceVertices,
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| 14 | VertexArray &faceNormals,
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| 15 | vector<Texcoord> &faceTexcoords
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| 16 | )
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| 17 | {
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| 18 | vector<char *> substrings;
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| 19 |
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| 20 | char *next_token;
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| 21 |
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| 22 | // extract the triples of the form v/t/n v/t/n ...
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| 23 | char *pch = strtok_s(str + 1, " ", &next_token);
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| 24 |
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| 25 | while (pch != NULL)
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| 26 | {
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| 27 | substrings.push_back(pch);
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| 28 | pch = strtok_s(NULL, " ", &next_token);
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| 29 | }
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| 30 |
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| 31 | vector<int> indices;
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| 32 | vector<int> nIndices;
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| 33 | vector<int> tIndices;
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| 34 |
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| 35 | //cout << "number of vertices=" << (int)vertices.size() << endl;
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| 36 |
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| 37 | for (size_t i = 0; i < substrings.size(); ++ i)
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| 38 | {
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| 39 | // vertex, normal and texture indices
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| 40 | char *str = strtok_s(substrings[i], "/", &next_token);
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| 41 | int index = (int)strtol(str, NULL, 10) - 1;
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| 42 |
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[2963] | 43 | int tIndex = index;
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| 44 | int nIndex = index;
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| 45 |
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| 46 | /*str = strtok_s(substrings[i], "/", &next_token);
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[2961] | 47 | int tIndex = (int)strtol(str, NULL, 10) - 1;
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| 48 |
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| 49 | str = strtok_s(substrings[i], "/", &next_token);
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| 50 | int nIndex = (int)strtol(str, NULL, 10) - 1;
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[2963] | 51 | */
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[2961] | 52 | // store indices
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| 53 | if (index >= 0)
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| 54 | {
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| 55 | indices.push_back(index);
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| 56 | nIndices.push_back(nIndex);
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| 57 | tIndices.push_back(tIndex);
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| 58 | }
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| 59 |
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| 60 | // new triangle found
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| 61 | if (indices.size() > 2)
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| 62 | {
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| 63 | #if 1
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| 64 | int idx1 = 0;
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| 65 | int idx2 = (int)indices.size() - 2;
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| 66 | int idx3 = (int)indices.size() - 1;
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| 67 | #else
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| 68 | int idx3 = 0;
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| 69 | int idx2 = (int)indices.size() - 2;
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| 70 | int idx1 = (int)indices.size() - 1;
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| 71 | #endif
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| 72 | faceVertices.push_back(vertices[indices[idx1]]);
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| 73 | faceVertices.push_back(vertices[indices[idx2]]);
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| 74 | faceVertices.push_back(vertices[indices[idx3]]);
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[2963] | 75 |
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| 76 | Vector3 dummy(1, 0, 0);
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| 77 | faceNormals.push_back(dummy);
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| 78 | faceNormals.push_back(dummy);
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| 79 | faceNormals.push_back(dummy);
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| 80 |
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| 81 | /*
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| 82 | const Vector3 v2 = mVertices[2] - mVertices[1];
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| 83 | Normalize(CrossProd(v2, v1));
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| 84 |
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[2961] | 85 | faceNormals.push_back(normals[nIndices[idx1]]);
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| 86 | faceNormals.push_back(normals[nIndices[idx2]]);
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| 87 | faceNormals.push_back(normals[nIndices[idx3]]);
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| 88 |
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| 89 | faceTexcoords.push_back(texcoords[tIndices[idx1]]);
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| 90 | faceTexcoords.push_back(texcoords[tIndices[idx2]]);
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| 91 | faceTexcoords.push_back(texcoords[tIndices[idx3]]);
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[2963] | 92 | */
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[2961] | 93 | }
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| 94 | }
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| 95 | }
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| 96 |
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| 97 |
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| 98 | ObjConverter::ObjConverter()
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| 99 | {}
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| 100 |
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| 101 |
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| 102 | ObjConverter::~ObjConverter()
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| 103 | {
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| 104 | for (size_t i = 0; i < mGeometry.size(); ++ i)
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| 105 | {
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| 106 | delete [] mGeometry[i]->mVertices;
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| 107 | delete [] mGeometry[i]->mNormals;
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| 108 | delete [] mGeometry[i]->mTexcoords;
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| 109 |
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| 110 | delete mGeometry[i];
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| 111 | }
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| 112 |
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| 113 | mGeometry.clear();
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| 114 | }
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| 115 |
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| 116 |
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| 117 | void ObjConverter::LoadShape(const VertexArray &faceVertices,
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| 118 | const VertexArray &faceNormals,
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| 119 | const vector<Texcoord> &faceTexcoords)
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| 120 | {
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| 121 | int numElements = (int)faceVertices.size();
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| 122 | Geometry *geom = new Geometry();
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| 123 |
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| 124 | // convert the triangles to geometry
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| 125 | geom->mVertices = new Vector3[numElements];
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| 126 | geom->mNormals = new Vector3[numElements];
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| 127 | geom->mTexcoords = new Texcoord[numElements];
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| 128 |
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| 129 | geom->mVertexCount = numElements;
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| 130 | geom->mTexcoordCount = (int)faceTexcoords.size();
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| 131 |
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| 132 | cout << "number of vertices=" << numElements << endl;
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| 133 |
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| 134 | for (int i = 0; i < numElements; ++ i)
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| 135 | {
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| 136 | geom->mVertices[i].x = faceVertices[i].x;
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| 137 | geom->mVertices[i].y = -faceVertices[i].z;
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| 138 | geom->mVertices[i].z = faceVertices[i].y;
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| 139 |
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| 140 | geom->mNormals[i].x = faceNormals[i].x;
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| 141 | geom->mNormals[i].y = -faceNormals[i].z;
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| 142 | geom->mNormals[i].z = faceNormals[i].y;
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| 143 |
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[2963] | 144 | if (i <= geom->mTexcoordCount)
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| 145 | {
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| 146 | geom->mTexcoords[i].first = faceTexcoords[i].first;
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| 147 | geom->mTexcoords[i].second = faceTexcoords[i].second;
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| 148 | }
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[2961] | 149 | }
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| 150 |
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| 151 | mGeometry.push_back(geom);
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| 152 | }
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| 153 |
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| 154 |
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| 155 | bool ObjConverter::Convert(const string &filename, const std::string &outputFilename)
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| 156 | {
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| 157 | mNumShapes = 0;
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| 158 |
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| 159 | for (size_t i = 0; i < mGeometry.size(); ++ i)
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| 160 | {
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| 161 | delete [] mGeometry[i]->mVertices;
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| 162 | delete [] mGeometry[i]->mNormals;
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| 163 | delete [] mGeometry[i]->mTexcoords;
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| 164 |
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| 165 | delete mGeometry[i];
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| 166 | }
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| 167 |
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| 168 | mGeometry.clear();
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| 169 |
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| 170 | if (!ReadFile(filename))
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| 171 | {
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| 172 | cerr << "could not read file" << endl;
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| 173 | return false;
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| 174 | }
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| 175 |
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| 176 | if (!WriteFile(outputFilename))
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| 177 | {
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| 178 | cerr << "could not write file" << endl;
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| 179 | return false;
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| 180 | }
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| 181 |
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| 182 |
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| 183 | return true;
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| 184 | }
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| 185 |
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| 186 |
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| 187 | bool ObjConverter::ReadFile(const string &filename)
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| 188 | {
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| 189 | FILE *file;
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| 190 |
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| 191 | if ((file = fopen(filename.c_str(), "r")) == NULL)
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| 192 | {
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| 193 | return false;
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| 194 | }
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| 195 |
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| 196 | VertexArray faceVertices;
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| 197 | VertexArray faceNormals;
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| 198 | vector<Texcoord> faceTexcoords;
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| 199 |
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| 200 | VertexArray vertices;
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| 201 | VertexArray normals;
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| 202 | vector<Texcoord> texcoords;
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| 203 |
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| 204 | vector<int> indices;
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| 205 |
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| 206 | int line = 0;
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| 207 |
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| 208 | const int len = 10000;
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| 209 | char str[len];
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| 210 |
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| 211 | while (fgets(str, len, file) != NULL)
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| 212 | {
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| 213 | //cout << str;
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| 214 | switch (str[0])
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| 215 | {
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| 216 | case 'v': // vertex or normal
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| 217 | {
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| 218 | float x, y, z;
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| 219 |
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| 220 | switch (str[1])
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| 221 | {
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| 222 | case 'n' :
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| 223 | sscanf(str + 2, "%f %f %f", &x, &y, &z);
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| 224 | normals.push_back(Vector3(x, y, z));
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| 225 | break;
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| 226 | case 't':
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| 227 | sscanf(str + 2, "%f %f", &x, &y);
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| 228 | texcoords.push_back(pair<float, float>(x, y));
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| 229 | break;
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| 230 | default:
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| 231 | sscanf(str + 1, "%f %f %f", &x, &y, &z);
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| 232 | vertices.push_back(Vector3(x, y, z));
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| 233 | //cout <<"v " << x << " " << y << " "<< z << " ";
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| 234 | }
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| 235 | break;
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| 236 | }
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| 237 | case 'f':
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| 238 | {
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| 239 | //////////
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| 240 | //-- indices in the current line
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| 241 |
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| 242 | LoadIndices(str,
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| 243 | vertices, normals, texcoords,
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| 244 | faceVertices, faceNormals, faceTexcoords);
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| 245 |
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[2963] | 246 | if (((line % 100) == 99) &&
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| 247 | !faceVertices.empty())
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| 248 | {
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| 249 | ++ mNumShapes;
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| 250 |
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| 251 | LoadShape(faceVertices, faceNormals, faceTexcoords);
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| 252 |
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| 253 | faceVertices.clear();
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| 254 | faceNormals.clear();
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| 255 | faceTexcoords.clear();
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| 256 | }
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| 257 |
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[2961] | 258 | break;
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| 259 | } // end face
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| 260 | case 'g':
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| 261 | {/*
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| 262 | if (!faceVertices.empty())
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| 263 | {
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| 264 | ++ mNumShapes;
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| 265 |
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| 266 | LoadShape(faceVertices, faceNormals, faceTexcoords);
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| 267 |
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| 268 | faceVertices.clear();
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| 269 | faceNormals.clear();
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| 270 | faceTexcoords.clear();
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| 271 | }*/
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| 272 | }
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| 273 | break;
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| 274 | default:
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| 275 | break;
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| 276 | }
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| 277 |
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| 278 | ++ line;
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| 279 | }
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| 280 |
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| 281 | if (!faceVertices.empty())
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| 282 | {
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| 283 | ++ mNumShapes;
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| 284 |
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| 285 | LoadShape(faceVertices, faceNormals, faceTexcoords);
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| 286 |
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| 287 | faceVertices.clear();
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| 288 | faceNormals.clear();
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| 289 | faceTexcoords.clear();
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| 290 | }
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| 291 |
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| 292 | fclose(file);
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| 293 |
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| 294 | return true;
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| 295 | }
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| 296 |
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| 297 |
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| 298 | void ObjConverter::WriteGeometry(ogzstream &str, Geometry *geom)
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| 299 | {
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| 300 | int vertexCount = geom->mVertexCount;
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| 301 | str.write(reinterpret_cast<char *>(&vertexCount), sizeof(int));
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| 302 |
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| 303 | str.write(reinterpret_cast<char *>(geom->mVertices), sizeof(Vector3) * vertexCount);
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| 304 | str.write(reinterpret_cast<char *>(geom->mNormals), sizeof(Vector3) * vertexCount);
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| 305 |
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| 306 | int texCoordCount = geom->mTexcoordCount;
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| 307 | str.write(reinterpret_cast<char *>(&texCoordCount), sizeof(int));
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| 308 |
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| 309 | if (texCoordCount)
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| 310 | str.write(reinterpret_cast<char *>(geom->mTexcoords), sizeof(float) * texCoordCount * 2);
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| 311 |
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| 312 |
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| 313 | ///////
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| 314 | //-- texture
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| 315 |
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[2963] | 316 | int texId = -1;
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| 317 | //int texId = 0;
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[2961] | 318 | str.write(reinterpret_cast<char *>(&texId), sizeof(int));
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| 319 |
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| 320 | bool alphaTestEnabled = false;
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| 321 | bool cullFaceEnabled = false;
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| 322 | //bool cullFaceEnabled = true;
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| 323 |
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| 324 | str.write(reinterpret_cast<char *>(&alphaTestEnabled), sizeof(bool));
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| 325 | str.write(reinterpret_cast<char *>(&cullFaceEnabled), sizeof(bool));
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| 326 |
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| 327 | // material
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| 328 | //bool hasMaterial = true;
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| 329 | bool hasMaterial = false;
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| 330 | str.write(reinterpret_cast<char *>(&hasMaterial), sizeof(bool));
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| 331 |
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| 332 | if (hasMaterial)
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| 333 | {
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| 334 | Vector3 ambient, diffuse, black;
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| 335 |
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| 336 | ambient.x = ambient.y = ambient.z = 0.2f;
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| 337 | diffuse.x = diffuse.y = diffuse.z = 1.0f;
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| 338 | black.x = black.y = black.z = .0f;
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| 339 |
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| 340 | // only write rgb part of the material
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| 341 | str.write(reinterpret_cast<char *>(&ambient), sizeof(Vector3));
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| 342 | str.write(reinterpret_cast<char *>(&diffuse), sizeof(Vector3));
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| 343 | str.write(reinterpret_cast<char *>(&black), sizeof(Vector3));
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| 344 | str.write(reinterpret_cast<char *>(&black), sizeof(Vector3));
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| 345 | }
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| 346 | }
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| 347 |
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| 348 |
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| 349 | bool ObjConverter::WriteFile(const string &filename)
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| 350 | {
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| 351 | ogzstream ofile(filename.c_str());
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| 352 |
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| 353 | if (!ofile.is_open())
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| 354 | return false;
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| 355 |
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| 356 |
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| 357 | /////////
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| 358 | //-- write textures
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| 359 |
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[2963] | 360 | //int textureCount = 1;
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| 361 | int textureCount = 0;
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[2961] | 362 |
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| 363 | ofile.write(reinterpret_cast<char *>(&textureCount), sizeof(int));
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| 364 |
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| 365 | if (textureCount > 0)
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| 366 | {
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| 367 | const string texName("wood.jpg");
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| 368 |
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| 369 | int texnameSize = (int)texName.length() + 1;
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| 370 | ofile.write(reinterpret_cast<char *>(&texnameSize), sizeof(int));
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| 371 |
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| 372 | ofile.write(texName.c_str(), sizeof(char) * texnameSize);
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| 373 |
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| 374 | int boundS = 1;
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| 375 | int boundT = 1;
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| 376 |
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| 377 | ofile.write(reinterpret_cast<char *>(&boundS), sizeof(int));
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| 378 | ofile.write(reinterpret_cast<char *>(&boundT), sizeof(int));
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| 379 | }
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| 380 |
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| 381 |
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| 382 | ///////////
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| 383 | //-- write shapes
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| 384 |
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| 385 | ofile.write(reinterpret_cast<char *>(&mNumShapes), sizeof(int));
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| 386 |
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| 387 | vector<Geometry *>::const_iterator it, it_end = mGeometry.end();
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| 388 |
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| 389 | for (it = mGeometry.begin(); it != it_end; ++ it)
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| 390 | {
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| 391 | WriteGeometry(ofile, *it);
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| 392 | }
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| 393 |
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| 394 |
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| 395 | int entityCount = 1;
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| 396 | ofile.write(reinterpret_cast<char *>(&entityCount), sizeof(int));
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| 397 |
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| 398 |
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| 399 | //////////
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| 400 | //-- write single scene entity
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| 401 |
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| 402 | // no transformation
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| 403 | bool hasTrafo = false;
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| 404 | ofile.write(reinterpret_cast<char *>(&hasTrafo), sizeof(bool));
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| 405 |
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| 406 | // a dummy lod
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| 407 | int numLODs = 1;
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| 408 | ofile.write(reinterpret_cast<char *>(&numLODs), sizeof(int));
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| 409 |
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| 410 | float dist = 0;
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| 411 | ofile.write(reinterpret_cast<char *>(&dist), sizeof(float));
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| 412 |
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| 413 | ofile.write(reinterpret_cast<char *>(&mNumShapes), sizeof(int));
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| 414 |
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| 415 | // all shapes belong to this scene entity
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| 416 | for (int i = 0; i < mNumShapes; ++ i)
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| 417 | {
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| 418 | int shapeId = i;
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| 419 | ofile.write(reinterpret_cast<char *>(&shapeId), sizeof(int));
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| 420 | }
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| 421 |
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| 422 | return true;
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| 423 | } |
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