Add optional texture coordinates index
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parent
afa9b47d3c
commit
f35711d752
40
main.cpp
40
main.cpp
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@ -205,10 +205,13 @@ Model::Model(const char *const filename)
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std::ifstream file(filename, std::ios::in);
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std::vector<glm::vec3> tmp_positions;
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std::vector<glm::vec2> tmp_tex_coords;
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std::vector<glm::vec3> tmp_normals;
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size_t index = 0;
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int attr_count = 0;
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std::string line;
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while (std::getline(file, line))
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{
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@ -219,30 +222,55 @@ Model::Model(const char *const filename)
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tmp_positions.push_back(v);
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}
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else
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if (line.substr(0, 3) == "vt ")
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{
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glm::vec2 vt;
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sscanf(line.data(), "vt %f %f", &vt.x, &vt.y);
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tmp_tex_coords.push_back(vt);
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}
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else
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if (line.substr(0, 3) == "vn ")
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{
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glm::vec3 n;
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sscanf(line.data(), "vn %f %f %f", &n.x, &n.y, &n.z);
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tmp_normals.push_back(n);
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glm::vec3 vn;
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sscanf(line.data(), "vn %f %f %f", &vn.x, &vn.y, &vn.z);
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tmp_normals.push_back(vn);
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}
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else
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if (line.substr(0, 2) == "f ")
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{
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if (attr_count == 0)
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{
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if (line.find("//") == std::string::npos)
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attr_count = 3;
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else
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attr_count = 2;
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}
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GLushort v[3];
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GLushort vt[3];
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GLushort vn[3];
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sscanf(line.data(), "f %hu//%hu %hu//%hu %hu//%hu", &v[0], &vn[0], &v[1], &vn[1], &v[2], &vn[2]);
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if (attr_count == 2)
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sscanf(line.data(), "f %hu//%hu %hu//%hu %hu//%hu", &v[0], &vn[0], &v[1], &vn[1], &v[2], &vn[2]);
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else
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sscanf(line.data(), "f %hu/%hu/%hu %hu/%hu/%hu %hu/%hu/%hu", &v[0], &vt[0], &vn[0],
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&v[1], &vt[1], &vn[1],
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&v[2], &vt[2], &vn[2]);
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for (int i = 0; i < 3; ++i)
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{
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elements.push_back(index++);
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positions.push_back(tmp_positions[v[i] - 1]);
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if (attr_count == 3)
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tex_coords.push_back(tmp_tex_coords[vt[i] - 1]);
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normals.push_back(tmp_normals[vn[i] - 1]);
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elements.push_back(index++);
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}
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}
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}
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positions_id = create_array_buffer(GL_ARRAY_BUFFER, 3 * positions.size() * sizeof(GLfloat), positions.data());
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tex_coords_id = create_array_buffer(GL_ARRAY_BUFFER, 2 * tex_coords.size() * sizeof(GLfloat), tex_coords.data());
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if (attr_count == 3)
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tex_coords_id = create_array_buffer(GL_ARRAY_BUFFER, 2 * tex_coords.size() * sizeof(GLfloat), tex_coords.data());
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normals_id = create_array_buffer(GL_ARRAY_BUFFER, 3 * normals.size() * sizeof(GLfloat), normals.data());
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id = create_array_buffer(GL_ELEMENT_ARRAY_BUFFER, elements.size() * sizeof(GLushort), elements.data());
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}
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