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matabstrix
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Add optional texture coordinates index

This commit is contained in:
Meoweg 2015-11-06 21:40:21 +00:00
parent afa9b47d3c
commit f35711d752
1 changed files with 34 additions and 6 deletions
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40
main.cpp
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@ -205,10 +205,13 @@ Model::Model(const char *const filename)
std::ifstream file(filename, std::ios::in);
std::vector<glm::vec3> tmp_positions;
std::vector<glm::vec2> tmp_tex_coords;
std::vector<glm::vec3> tmp_normals;
size_t index = 0;
int attr_count = 0;
std::string line;
while (std::getline(file, line))
{
@ -219,30 +222,55 @@ Model::Model(const char *const filename)
tmp_positions.push_back(v);
}
else
if (line.substr(0, 3) == "vt ")
{
glm::vec2 vt;
sscanf(line.data(), "vt %f %f", &vt.x, &vt.y);
tmp_tex_coords.push_back(vt);
}
else
if (line.substr(0, 3) == "vn ")
{
glm::vec3 n;
sscanf(line.data(), "vn %f %f %f", &n.x, &n.y, &n.z);
tmp_normals.push_back(n);
glm::vec3 vn;
sscanf(line.data(), "vn %f %f %f", &vn.x, &vn.y, &vn.z);
tmp_normals.push_back(vn);
}
else
if (line.substr(0, 2) == "f ")
{
if (attr_count == 0)
{
if (line.find("//") == std::string::npos)
attr_count = 3;
else
attr_count = 2;
}
GLushort v[3];
GLushort vt[3];
GLushort vn[3];
sscanf(line.data(), "f %hu//%hu %hu//%hu %hu//%hu", &v[0], &vn[0], &v[1], &vn[1], &v[2], &vn[2]);
if (attr_count == 2)
sscanf(line.data(), "f %hu//%hu %hu//%hu %hu//%hu", &v[0], &vn[0], &v[1], &vn[1], &v[2], &vn[2]);
else
sscanf(line.data(), "f %hu/%hu/%hu %hu/%hu/%hu %hu/%hu/%hu", &v[0], &vt[0], &vn[0],
&v[1], &vt[1], &vn[1],
&v[2], &vt[2], &vn[2]);
for (int i = 0; i < 3; ++i)
{
elements.push_back(index++);
positions.push_back(tmp_positions[v[i] - 1]);
if (attr_count == 3)
tex_coords.push_back(tmp_tex_coords[vt[i] - 1]);
normals.push_back(tmp_normals[vn[i] - 1]);
elements.push_back(index++);
}
}
}
positions_id = create_array_buffer(GL_ARRAY_BUFFER, 3 * positions.size() * sizeof(GLfloat), positions.data());
tex_coords_id = create_array_buffer(GL_ARRAY_BUFFER, 2 * tex_coords.size() * sizeof(GLfloat), tex_coords.data());
if (attr_count == 3)
tex_coords_id = create_array_buffer(GL_ARRAY_BUFFER, 2 * tex_coords.size() * sizeof(GLfloat), tex_coords.data());
normals_id = create_array_buffer(GL_ARRAY_BUFFER, 3 * normals.size() * sizeof(GLfloat), normals.data());
id = create_array_buffer(GL_ELEMENT_ARRAY_BUFFER, elements.size() * sizeof(GLushort), elements.data());
}