void MainWindow::createActions() {
newObjFileAction_ = new QAction("Load OBJ Model", this);
newObjFileAction_->setShortcut(QKeySequence::New);
newObjFileAction_->setIcon(QIcon(":/assets/images/obj.png"));
newObjFileAction_->setStatusTip("Loads OBJ Model into the Main View");
connect(newObjFileAction_, SIGNAL(triggered()), this, SLOT(openObjFile()));
exitAction_ = new QAction("Exit", this);
exitAction_->setShortcut(QKeySequence::Quit);
exitAction_->setStatusTip("Exit the application");
connect(exitAction_, SIGNAL(triggered()), this, SLOT(close()));
}
void MeshBase::loadDataFromObj( const std::string& filename )
{
FILE* file = openObjFile(filename);
int vertices_index = 0;
int normals_index = 0;
int colors_index = 0;
int texture_coordinates_index = 0;
int triangles_index = 0;
float* vertices = m_vertex_data;
float* normals = m_normal_data;
unsigned char* colors = m_color_data;
float* texture_coordinates = m_texture_coordinate_data;
// 0 as a stride signals compact data
int v_stride = m_vertex_stride == 0 ? 3 : m_vertex_stride;
int n_stride = m_normal_stride == 0 ? 3 : m_normal_stride;
int c_stride = m_color_stride == 0 ? 3 : m_color_stride;
int t_stride = m_texture_coordinate_stride == 0
? 2 : m_texture_coordinate_stride;
bool is_loading_curr_group = false;
std::string curr_group_name = default_group_name;
std::string curr_group_base_name = default_group_name;
MeshGroup* curr_group_data = 0;
MeshGroupMap::const_iterator default_group_iter
= m_mesh_groups.find(default_group_name);
if( default_group_iter == m_mesh_groups.end() ) {
is_loading_curr_group = false;
curr_group_data = 0;
}
else {
is_loading_curr_group = true;
curr_group_data = &m_mesh_groups[default_group_name];
}
std::string curr_material_name = default_material_name;
int curr_material_number = 0;
// Init. the current group triangle index to 0 for each group, so the current
// triangle index of each can be tracked.
std::map<std::string, int> groups_triangles_index;
forEachGroup( GroupCurrentIndexInitFunctor(groups_triangles_index) );
// For improved speed, so that we don't need a lookup in groups_triangles_index
// for every single face--only when the group changes.
int* curr_group_triangles_index = &groups_triangles_index[default_group_name];
bool uses_vertices = ( m_num_vertices > 0 && vertices != 0 );
bool uses_normals = ( m_num_normals > 0 && normals != 0 );
bool uses_colors = ( m_num_colors > 0 && colors != 0 );
bool uses_texture_coordinates
= ( m_num_texture_coordinates > 0
&& texture_coordinates != 0 );
int v[3], n[3], t[3];
float f[3];
char buf[2048];
while(fscanf(file, "%s", buf) != EOF) {
switch(buf[0]) {
case '#': /* comment */
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
break;
case 'v': /* v, vn, vt */
switch(buf[1]) {
case '\0': /* vertex */
if( !uses_colors ) {
fscanf( file, "%f %f %f", &f[0], &f[1], &f[2] );
if( uses_vertices ) {
for( int i = 0; i < 3; ++i ) {
vertices[v_stride*vertices_index + i] = f[i];
}
++vertices_index;
}
}
else {
int c[3];
fscanf( file, "%f %f %f %d %d %d",
&f[0], &f[1], &f[2],
&c[0], &c[1], &c[2] );
if( uses_vertices ) {
for( int i = 0; i < 3; ++i ) {
vertices[v_stride*vertices_index + i] = f[i];
}
++vertices_index;
}
if( uses_colors ) {
for( int i = 0; i < 3; ++i ) {
colors[c_stride*colors_index + i] = static_cast<unsigned char>( c[i] );
++colors_index;
}
}
}
break;
case 'n': /* normal */
fscanf( file, "%f %f %f",
&f[0], &f[1], &f[2] );
if( uses_normals ) {
for( int i = 0; i < 3; ++i ) {
normals[n_stride*normals_index + i] = f[i];
}
++normals_index;
}
break;
case 't': /* texcoord */
fscanf( file, "%f %f",
&f[0], &f[1] );
if( uses_texture_coordinates ) {
for( int i = 0; i < 2; ++i ) {
texture_coordinates[t_stride*texture_coordinates_index + i] = f[i];
}
++texture_coordinates_index;
}
break;
}
break;
case 'u': /* "usemtl <name>" */
fgets(buf, sizeof(buf), file);
sscanf(buf, "%s %s", buf, buf);
curr_material_name = buf;
curr_material_number = m_material_numbers_by_name.at(curr_material_name);
curr_group_name = groupMaterialName( curr_group_base_name, curr_material_name );
// Set up a valid current group only if the new group hasn't been excluded from loading
if( m_mesh_groups.find(curr_group_name) != m_mesh_groups.end() ) {
is_loading_curr_group = true;
curr_group_data = &m_mesh_groups[curr_group_name];
curr_group_triangles_index = &groups_triangles_index[curr_group_name];
curr_group_data->material_number = curr_material_number;
}
else {
is_loading_curr_group = false;
curr_group_data = 0;
curr_group_triangles_index = 0;
}
break;
case 'o': /* "o <object name>" */
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
break;
case 'g': /* "g <group name>" */
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
sscanf(buf, "%s", buf);
curr_group_base_name = buf;
curr_group_name = groupMaterialName( curr_group_base_name,
curr_material_name );
// Set up a valid current group only if the new group hasn't been excluded from loading
if( m_mesh_groups.find( curr_group_name ) != m_mesh_groups.end() ) {
is_loading_curr_group = true;
curr_group_data = &m_mesh_groups[curr_group_name];
curr_group_triangles_index = &groups_triangles_index[curr_group_name];
curr_group_data->material_number = curr_material_number;
}
else {
is_loading_curr_group = false;
curr_group_data = 0;
curr_group_triangles_index = 0;
}
break;
case 'm': /* "mtllib <material library name>" */
fgets(buf, sizeof(buf), file);
sscanf(buf, "%s %s", buf, buf);
{
std::string dir = directoryOfFilePath( filename );
std::stringstream ss_material_library_name;
ss_material_library_name << dir << m_material_library_name;
loadMaterials( ss_material_library_name.str() );
}
break;
case 'f': /* face */
#define NEWEST_INDEX(indices, vertex_offset) \
curr_group_data->indices[3*(*curr_group_triangles_index) + (vertex_offset)]
#define PREVIOUS_INDEX(indices, vertex_offset) \
curr_group_data->indices[3*(*curr_group_triangles_index - 1) + (vertex_offset)]
for (int i = 0; i < 3; ++i) {
v[i] = n[i] = t[i] = 0;
}
fscanf(file, "%s", buf);
/* can be one of %d, %d//%d, %d/%d, %d/%d/%d %d//%d */
if( strstr(buf, "//" )) {
/* v//n */
sscanf(buf, "%d//%d", &v[0], &n[0]);
fscanf(file, "%d//%d", &v[1], &n[1]);
fscanf(file, "%d//%d", &v[2], &n[2]);
// We still need to advance through the file, but don't store
// what is parsed for groups we've been told not to load
if( is_loading_curr_group ) {
if( uses_vertices ) {
for (int i = 0; i < 3; ++i) {
NEWEST_INDEX(vertex_indices, i)
= (v[i] >= 0) ? v[i] - 1 : (vertices_index + v[i]);
}
}
if( uses_normals ) {
for (int i = 0; i < 3; ++i) {
NEWEST_INDEX(normal_indices, i) = n[i] - 1;
}
}
if( uses_texture_coordinates ) {
for (int i = 0; i < 3; ++i) {
NEWEST_INDEX(texture_coordinate_indices, i)
= MESH_ATTRIBUTE_NOT_PROVIDED;
}
}
++(*curr_group_triangles_index);
++triangles_index;
}
// Load face as a triangle fan when there are more than three indices
while(fscanf(file, "%d//%d", &v[0], &n[0]) > 0) {
if( is_loading_curr_group ) {
if( uses_vertices ) {
NEWEST_INDEX(vertex_indices, 0) = PREVIOUS_INDEX(vertex_indices, 0);
NEWEST_INDEX(vertex_indices, 1) = PREVIOUS_INDEX(vertex_indices, 2);
NEWEST_INDEX(vertex_indices, 2) = (v[0] >= 0)
? v[0] - 1: (vertices_index + v[0]);
}
if( uses_normals ) {
NEWEST_INDEX(normal_indices, 0) = PREVIOUS_INDEX(normal_indices, 0);
NEWEST_INDEX(normal_indices, 1) = PREVIOUS_INDEX(normal_indices, 2);
NEWEST_INDEX(normal_indices, 2) = n[0] - 1;
}
if( uses_texture_coordinates ) {
for (int i = 0; i < 3; ++i) {
NEWEST_INDEX(texture_coordinate_indices, i)
= MESH_ATTRIBUTE_NOT_PROVIDED;
}
}
++(*curr_group_triangles_index);
++triangles_index;
}
}
}
else if( sscanf(buf, "%d/%d/%d", &v[0], &t[0], &n[0] ) == 3) {
/* v/t/n */
fscanf(file, "%d/%d/%d", &v[1], &t[1], &n[1]);
fscanf(file, "%d/%d/%d", &v[2], &t[2], &n[2]);
if( is_loading_curr_group ) {
if( uses_vertices ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(vertex_indices, i)
= (v[i] >= 0) ? v[i] - 1 : (vertices_index + v[i]);
}
}
if( uses_normals ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(normal_indices, i) = n[i] - 1;
}
}
if( uses_texture_coordinates ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(texture_coordinate_indices, i) = t[i] - 1;
}
}
++(*curr_group_triangles_index);
++triangles_index;
}
// Load face as a triangle fan when there are more than three indices
while(fscanf(file, "%d/%d/%d", &v[0], &t[0], &n[0]) > 0) {
if( is_loading_curr_group ) {
if( uses_vertices ) {
NEWEST_INDEX(vertex_indices, 0) = PREVIOUS_INDEX(vertex_indices, 0);
NEWEST_INDEX(vertex_indices, 1) = PREVIOUS_INDEX(vertex_indices, 2);
NEWEST_INDEX(vertex_indices, 2) = (v[0] >= 0)
? v[0] - 1 : (vertices_index + v[0]);
}
if( uses_normals ) {
NEWEST_INDEX(normal_indices, 0) = PREVIOUS_INDEX(normal_indices, 0);
NEWEST_INDEX(normal_indices, 1) = PREVIOUS_INDEX(normal_indices, 2);
NEWEST_INDEX(normal_indices, 2) = n[0] - 1;
}
if( uses_texture_coordinates ) {
NEWEST_INDEX(texture_coordinate_indices, 0)
= PREVIOUS_INDEX(texture_coordinate_indices, 0);
NEWEST_INDEX(texture_coordinate_indices, 1)
= PREVIOUS_INDEX(texture_coordinate_indices, 2);
NEWEST_INDEX(texture_coordinate_indices, 2) = t[0] - 1;
}
++(*curr_group_triangles_index);
++triangles_index;
}
}
}
else if( sscanf(buf, "%d/%d", &v[0], &t[0] ) == 2) {
/* v/t */
fscanf(file, "%d/%d", &v[1], &t[1]);
fscanf(file, "%d/%d", &v[2], &t[2]);
if( is_loading_curr_group ) {
if( uses_vertices ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(vertex_indices, i)
= (v[i] >= 0) ? v[i] - 1 : (vertices_index + v[i]);
}
}
if( uses_normals ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(normal_indices, i) = MESH_ATTRIBUTE_NOT_PROVIDED;
}
}
if( uses_texture_coordinates ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(texture_coordinate_indices, i) = t[i] - 1;
}
}
++(*curr_group_triangles_index);
++triangles_index;
}
// Load face as triangle fan when more than three indices
while(fscanf(file, "%d/%d", &v[0], &t[0]) > 0) {
if( is_loading_curr_group ) {
if( uses_vertices ) {
NEWEST_INDEX(vertex_indices, 0) = PREVIOUS_INDEX(vertex_indices, 0);
NEWEST_INDEX(vertex_indices, 1) = PREVIOUS_INDEX(vertex_indices, 2);
NEWEST_INDEX(vertex_indices, 2) = (v[0] >= 0)
? v[0] - 1 : (vertices_index + v[0]);
}
if( uses_normals ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(normal_indices, i) = MESH_ATTRIBUTE_NOT_PROVIDED;
}
}
if( uses_texture_coordinates ) {
NEWEST_INDEX(texture_coordinate_indices, 0)
= PREVIOUS_INDEX(texture_coordinate_indices, 0);
NEWEST_INDEX(texture_coordinate_indices, 1)
= PREVIOUS_INDEX(texture_coordinate_indices, 2);
NEWEST_INDEX(texture_coordinate_indices, 2)
= t[0] - 1;
}
++(*curr_group_triangles_index);
++triangles_index;
}
}
}
else {
/* v */
sscanf(buf, "%d", &v[0]);
fscanf(file, "%d", &v[1]);
fscanf(file, "%d", &v[2]);
if( is_loading_curr_group ) {
if( uses_vertices ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(vertex_indices, i)
= (v[i] >= 0) ? v[i] - 1 : (vertices_index + v[i]);
}
}
if( uses_normals ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(normal_indices, i) = MESH_ATTRIBUTE_NOT_PROVIDED;
}
}
if( uses_texture_coordinates ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(texture_coordinate_indices, i)
= MESH_ATTRIBUTE_NOT_PROVIDED;
}
}
++(*curr_group_triangles_index);
++triangles_index;
}
// Load face with more than three indices as a triangle fan
while(fscanf(file, "%d", &v[0]) > 0) {
if( is_loading_curr_group ) {
if( uses_vertices ) {
NEWEST_INDEX(vertex_indices, 0) = PREVIOUS_INDEX(vertex_indices, 0);
NEWEST_INDEX(vertex_indices, 1) = PREVIOUS_INDEX(vertex_indices, 2);
NEWEST_INDEX(vertex_indices, 2) = (v[0] >= 0)
? v[0] - 1 : (vertices_index + v[0]);
}
if( uses_normals ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(normal_indices, i) = MESH_ATTRIBUTE_NOT_PROVIDED;
}
}
if( uses_texture_coordinates ) {
for( int i = 0; i < 3; ++i ) {
NEWEST_INDEX(texture_coordinate_indices, i)
= MESH_ATTRIBUTE_NOT_PROVIDED;
}
}
++(*curr_group_triangles_index);
triangles_index++;
}
}
}
#undef PREVIOUS_INDEX
#undef NEWEST_INDEX
break;
default:
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
break;
}
}
#if 0
/* announce the memory requirements */
printf(" Memory: %d bytes\n",
vertices_index * 3*sizeof(float) +
numnormals * 3*sizeof(float) * (numnormals ? 1 : 0) +
numtexcoords * 3*sizeof(float) * (numtexcoords ? 1 : 0) +
numtriangles * sizeof(GLMtriangle));
#endif
// It happens that in a .obj, all the color indices are identical to the
// vertex indices, so we simply copy them
if( uses_colors ) {
forEachGroup( VertexIndexToColorIndexCopyFunctor() );
}
}
// TODO: It sure would be nice to clean up or refactor the old GLM-style
// parsing paragraphs into helper functions, or even a class in its own right.
void MeshBase::loadInfoFromObj(const std::string& filename)
{
FILE* file = openObjFile(filename);
m_num_vertices = 0;
m_num_normals = 0;
m_num_colors = 0;
m_num_texture_coordinates = 0;
m_num_triangles = 0;
// Make a default group
std::string curr_group_name = default_group_name;
MeshGroup* curr_group = &getOrAddGroup( curr_group_name );
std::string curr_group_base_name = curr_group_name;
int material_count = 0;
std::string curr_material_name = default_material_name;
m_material_numbers_by_name[curr_material_name] = material_count;
++material_count;
int v, n, t;
char buf[2048];
while(fscanf(file, "%s", buf) != EOF) {
switch(buf[0]) {
case '#': /* comment */
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
break;
case 'v': /* v, vn, vt */
switch(buf[1]) {
case '\0': { /* vertex */
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
float vx,vy,vz;
int val = -1;
sscanf(buf,"%f %f %f %d",&vx, &vy, &vz, &val);
if( val >= 0 ) {
++m_num_colors;
}
++m_num_vertices;
break;
}
case 'n': /* normal */
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
++m_num_normals;
break;
case 't': /* texcoord */
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
++m_num_texture_coordinates;
break;
default:
printf("meshLoaderLoadInfoFromObj(): Unknown token \"%s\".\n", buf);
/* Could error out here, but we'll just skip it for now.*/
break;
}
break;
case 'm': /* "mtllib <name>" */
fgets(buf, sizeof(buf), file);
sscanf(buf, "%s %s", buf, buf);
m_material_library_name = buf;
break;
case 'u': /* "usemtl <name>" */
/* We need to create groups with their own materials */
fgets(buf, sizeof(buf), file);
sscanf(buf, "%s %s", buf, buf);
curr_material_name = buf;
if( m_material_numbers_by_name.find(curr_material_name)
== m_material_numbers_by_name.end() )
{
m_material_numbers_by_name[curr_material_name] = material_count;
++material_count;
}
curr_group = &getOrAddGroup( groupMaterialName(curr_group_base_name,
curr_material_name) );
break;
case 'o': /* "o <object name>" */
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
break;
case 'g': /* "g <group name>" */
fgets(buf, sizeof(buf), file);
sscanf(buf, "%s", buf);
curr_group_base_name = buf;
curr_group = &getOrAddGroup( groupMaterialName(curr_group_base_name,
curr_material_name) );
break;
case 'f': /* face */
v = n = t = 0;
fscanf(file, "%s", buf);
/* can be one of %d, %d//%d, %d/%d, %d/%d/%d %d//%d */
if( strstr(buf, "//" )) {
/* v//n */
sscanf(buf, "%d//%d", &v, &n);
fscanf(file, "%d//%d", &v, &n);
fscanf(file, "%d//%d", &v, &n);
++m_num_triangles;
++curr_group->num_triangles;
while(fscanf(file, "%d//%d", &v, &n) > 0) {
++m_num_triangles;
++curr_group->num_triangles;
}
}
else if( sscanf(buf, "%d/%d/%d", &v, &t, &n ) == 3) {
/* v/t/n */
fscanf(file, "%d/%d/%d", &v, &t, &n);
fscanf(file, "%d/%d/%d", &v, &t, &n);
++m_num_triangles;
++curr_group->num_triangles;
while(fscanf(file, "%d/%d/%d", &v, &t, &n) > 0) {
++m_num_triangles;
++curr_group->num_triangles;
}
}
else if( sscanf(buf, "%d/%d", &v, &t ) == 2) {
/* v/t */
fscanf(file, "%d/%d", &v, &t);
fscanf(file, "%d/%d", &v, &t);
++m_num_triangles;
++curr_group->num_triangles;
while(fscanf(file, "%d/%d", &v, &t) > 0) {
++m_num_triangles;
++curr_group->num_triangles;
}
}
else {
/* v */
fscanf(file, "%d", &v);
fscanf(file, "%d", &v);
++m_num_triangles;
++curr_group->num_triangles;
while(fscanf(file, "%d", &v) > 0) {
++m_num_triangles;
++curr_group->num_triangles;
}
}
break;
default:
/* eat up rest of line */
fgets(buf, sizeof(buf), file);
break;
}
}
// Prune out groups with 0 triangles;
forEachGroup( PruneEmptyGroupsFunctor(m_mesh_groups) );
}