bool load_mesh_from_file(const char *ctm_filepath, mesh_t & mesh)
{
CTMimporter ctm;
try {
ctm.Load(ctm_filepath);
unsigned int vertex_count = ctm.GetInteger(CTM_VERTEX_COUNT);
unsigned int vertex_element_count = 3 * vertex_count;
const CTMfloat *vertices = ctm.GetFloatArray(CTM_VERTICES);
mesh.vertices.resize(vertex_element_count);
std::memcpy(&mesh.vertices[0], vertices, vertex_element_count * sizeof(float));
unsigned int face_count = ctm.GetInteger(CTM_TRIANGLE_COUNT);
unsigned int indice_count = face_count * 3;
const CTMuint *indices = ctm.GetIntegerArray(CTM_INDICES);
mesh.indices.resize(indice_count);
std::memcpy(&mesh.indices[0], indices, indice_count * sizeof(unsigned int));
if (ctm.GetInteger(CTM_HAS_NORMALS) == CTM_TRUE) {
const CTMfloat *normals = ctm.GetFloatArray(CTM_NORMALS);
mesh.normals.resize(vertex_element_count);
std::memcpy(&mesh.normals[0], normals, vertex_element_count * sizeof(float));
} else {
std::cerr << "*** CTM_HAS_NORMALS == false" << std::endl;
}
unsigned int uv_map_count = ctm.GetInteger(CTM_UV_MAP_COUNT);
if (uv_map_count > 0) {
const CTMfloat *tex_coords = ctm.GetFloatArray(CTM_UV_MAP_1);
unsigned int tex_coord_element_count = 2 * vertex_count;
mesh.tex_coords.resize(tex_coord_element_count);
std::memcpy(&mesh.tex_coords[0], tex_coords, tex_coord_element_count * sizeof(float));
} else {
std::cerr << "*** UV map not found" << std::endl;
}
return true;
}
catch(ctm_error & e) {
std::cerr << "*** Loading CTM file failed: " << e.what() << std::endl;
return false;
}
}
bool mesh_t::read_from_file(const char *ctm_filepath, mesh_t &mesh) {
CTMimporter ctm;
try {
ctm.Load(ctm_filepath);
} catch(ctm_error & e) {
cerr << "*** Loading CTM file failed: " << e.what() << endl;
return false;
}
const CTMfloat *vertices;
const CTMuint *indices;
const CTMfloat *normals;
const CTMfloat *tex_coords;
const CTMfloat *tangents;
unsigned int vertex_count = ctm.GetInteger(CTM_VERTEX_COUNT);
vertices = ctm.GetFloatArray(CTM_VERTICES);
unsigned int face_count = ctm.GetInteger(CTM_TRIANGLE_COUNT);
unsigned int index_count = face_count * 3;
indices = ctm.GetIntegerArray(CTM_INDICES);
if (ctm.GetInteger(CTM_HAS_NORMALS) != CTM_TRUE) {
cerr << "*** normals not found" << endl;
}
normals = ctm.GetFloatArray(CTM_NORMALS);
unsigned int uv_map_count = ctm.GetInteger(CTM_UV_MAP_COUNT);
if (uv_map_count > 0) {
tex_coords = ctm.GetFloatArray(CTM_UV_MAP_1);
} else {
std::cerr << "*** uv map not found" << std::endl;
}
unsigned int attr_map_count = ctm.GetInteger(CTM_ATTRIB_MAP_COUNT);
if (attr_map_count > 0) {
tangents = ctm.GetFloatArray(CTM_ATTRIB_MAP_1);
}
mesh.vertices.resize(vertex_count);
for (unsigned int i = 0; i < vertex_count; i++) {
vertex_t &v = mesh.vertices[i];
unsigned int j = 3*i;
v.position.x = vertices[j];
v.position.y = vertices[j + 1];
v.position.z = vertices[j + 2];
v.position.w = 1.0f;
v.normal.x = normals[j];
v.normal.y = normals[j + 1];
v.normal.z = normals[j + 2];
if (uv_map_count > 0) {
unsigned int k = 2*i;
v.tex_coord.x = tex_coords[k];
v.tex_coord.y = tex_coords[k + 1];
}
if (attr_map_count > 0) {
v.tangent.x = tangents[j];
v.tangent.y = tangents[j + 1];
v.tangent.z = tangents[j + 2];
}
}
mesh.indices.resize(index_count);
std::memcpy(&mesh.indices[0], indices, index_count * sizeof(unsigned int));
return true;
}
bool OpenCTMLoader::readOpenCTM(const char *filename)
{
// Load the file using the OpenCTM API
CTMimporter ctm;
// Load the OpenCTM file
ctm.Load(filename);
// Access the mesh vertices
CTMuint vertCount = ctm.GetInteger(CTM_VERTEX_COUNT);
const CTMfloat * ctmVertices = ctm.GetFloatArray(CTM_VERTICES);
// Access the mesh triangles
CTMuint triCount = ctm.GetInteger(CTM_TRIANGLE_COUNT);
const CTMuint * indices = ctm.GetIntegerArray(CTM_INDICES);
// Filling vertices buffer
helper::vector<sofa::defaulttype::Vector3>& my_positions = *(positions.beginEdit());
my_positions.fastResize(vertCount);
for (unsigned int i=0; i<vertCount; ++i)
{
my_positions[i][0] = ctmVertices[i*3];
my_positions[i][1] = ctmVertices[i*3 + 1];
my_positions[i][2] = ctmVertices[i*3 + 2];
}
positions.endEdit();
// Filling triangles buffer
helper::vector<Triangle>& my_triangles = *(triangles.beginEdit());
my_triangles.fastResize(triCount);
for (unsigned int i=0; i<triCount; ++i)
{
my_triangles[i][0] = indices[i*3];
my_triangles[i][1] = indices[i*3 + 1];
my_triangles[i][2] = indices[i*3 + 2];
}
triangles.endEdit();
// Checking if mesh containes normals, otherwise fill empty buffer (NB seems mendatory for mecaObj)
if (ctm.GetInteger(CTM_HAS_NORMALS) == CTM_TRUE)
{
helper::vector<sofa::defaulttype::Vec<3,SReal> >& my_normals = *(normals.beginEdit());
my_normals.fastResize(vertCount);
// Access the mesh normals
const CTMfloat * ctmNormals = ctm.GetFloatArray(CTM_NORMALS);
for (unsigned int i=0; i<vertCount; ++i)
{
my_normals[i][0] = ctmNormals[i*3];
my_normals[i][1] = ctmNormals[i*3 + 1];
my_normals[i][2] = ctmNormals[i*3 + 2];
}
normals.endEdit();
}
// Checking if mesh containes texture coordinates. Only one set of UV is handled in SOFA
if(ctm.GetInteger(CTM_UV_MAP_COUNT) > 0)
{
const CTMfloat * ctmTexCoords = ctm.GetFloatArray(CTM_UV_MAP_1);
helper::vector<sofa::defaulttype::Vector2>& my_texCoords = *texCoords.beginEdit();
my_texCoords.fastResize(vertCount);
for (unsigned int i=0; i<vertCount; ++i)
{
my_texCoords[i][0] = ctmTexCoords[i*3];
my_texCoords[i][1] = ctmTexCoords[i*3 + 1];
}
texCoords.endEdit();
}
return true;
}
void mesh_manager::load_single_ctm_mesh(const std::string& path, shader_ptr shader, const glm::mat4& matrix, const GLuint tex_id, const std::string& key)
{
try
{
// Create a new OpenCTM importer object
CTMimporter ctm;
// Load the OpenCTM file
ctm.Load(path.c_str());
// Access the mesh data
CTMuint vertCount = ctm.GetInteger(CTM_VERTEX_COUNT);
const CTMfloat * vertices = ctm.GetFloatArray(CTM_VERTICES);
const CTMfloat * normals = ctm.GetFloatArray(CTM_NORMALS);
CTMuint triCount = ctm.GetInteger(CTM_TRIANGLE_COUNT);
const CTMuint * indices = ctm.GetIntegerArray(CTM_INDICES);
// Deal with the mesh (e.g. transcode it to our
// internal representation)
//-------------------------
//build vaos and vbos here
//mesh_ptr new_mesh = build_mesh_node(shader, matrix, tex_id, scene->mMeshes[0]);
//--------------------------------
//generate the vao
GLuint assimp_vao_id;
glGenVertexArrays(1, &assimp_vao_id);
//bind the vao
glBindVertexArray(assimp_vao_id);
//gererate the vbos
std::vector<GLuint> mesh_vbos;
GLuint position_vbo;
glGenBuffers(1, &position_vbo);
//vertices
glBindBuffer(GL_ARRAY_BUFFER, position_vbo);
glBufferData(GL_ARRAY_BUFFER,
3 * vertCount * sizeof(GLfloat),
vertices, GL_STATIC_DRAW);
shader->set_attrib_location("in_position", 3);
mesh_vbos.push_back(position_vbo);
//if (ctm.GetInteger(CTM_HAS_NORMALS) == CTM_TRUE) {
GLuint normal_vbo;
glGenBuffers(1, &normal_vbo);
//normals
glBindBuffer(GL_ARRAY_BUFFER, normal_vbo);
glBufferData(GL_ARRAY_BUFFER, 3 * vertCount * sizeof(GLfloat),
normals, GL_STATIC_DRAW);
shader->set_attrib_location("in_normal", 3);
mesh_vbos.push_back(normal_vbo);
//}
//uv coords
if (ctm.GetInteger(CTM_UV_MAP_COUNT) > 0) {
//just get first uv coords for now
const CTMfloat * uvcoords = ctm.GetFloatArray(CTM_UV_MAP_1);
GLuint texcoord_vbo;
glGenBuffers(1, &texcoord_vbo);
//texture
glBindBuffer(GL_ARRAY_BUFFER, texcoord_vbo);
glBufferData(GL_ARRAY_BUFFER, 2 * vertCount * sizeof(GLfloat),
uvcoords, GL_STATIC_DRAW);
shader->set_attrib_location("in_texcoord", 2);
mesh_vbos.push_back(texcoord_vbo);
}
//dont think ctm supports tangents?
//if (aimesh->HasTangentsAndBitangents() && config_manager::get_bool("load_tangents")) {
// GLuint tangent_vbo;
// glGenBuffers(1, &tangent_vbo);
// //tangents
// glBindBuffer(GL_ARRAY_BUFFER, tangent_vbo);
// glBufferData(GL_ARRAY_BUFFER, 3 * aimesh->mNumVertices * sizeof(GLfloat),
// aimesh->mTangents, GL_STATIC_DRAW);
// shader->set_attrib_location("in_tangent", 3);
// mesh_vbos.push_back(tangent_vbo);
//}
get_errors();
GLuint index_vbo;
glGenBuffers(1, &index_vbo);
//std::vector<GLuint> index_vector;
//int num_indices = 0;
////get all the indices
//for (unsigned int idx=0; idx < triCount * 3; idx++) {
// //for (unsigned int idx=0; idx < aimesh->mFaces[face].mNumIndices; idx++) {
// index_vector.push_back( indices[idx] );
// num_indices++;
// //}
//}
//indices
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_vbo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, 3 * triCount * sizeof(GLuint),
indices, GL_STATIC_DRAW);
mesh_vbos.push_back(index_vbo);
// ------------------------
//finally, do the map entry
// ------------------------
mesh_ptr new_mesh(new mesh_node(matrix, assimp_vao_id, triCount * 3) );
new_mesh->vao_id = assimp_vao_id;
new_mesh->vbos = mesh_vbos;
new_mesh->set_texture_id(tex_id);
// build mesh end
//---------------
// get the key for the mesh
string mesh_key = key;
if (key.empty()) {
//take stem as key
boost::filesystem::path p(path);
mesh_key = p.stem().generic_string();
}
// do we have only one mesh
// add the mesh node with the filename as the key
_map[mesh_key] = new_mesh;
//unbind vao and vbos
glBindVertexArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
if(!(glGetError() == GL_NO_ERROR))
{
cout << "mesh_manager: OGL error building node for CTM mesh " << 0 << " of " << path << endl;
}
}
catch(exception &e)
{
cout << "Error: mesh manager CTM: " << e.what() << endl;
}
}