bool load_frame( int frame_num, bool &stop ){
int n_meshes = meshes.size();
int n_obs = obstacles.size();
// Winding order matters for whatever is reading in the abc file.
bool ccw_output = false;
std::string framestr = pad_leading_zeros(6,frame_num);
// Load all deforming meshes
for( int m=0; m<n_meshes; ++m ){
std::string meshstr = pad_leading_zeros(2,m);
std::string objfile = dir + framestr + '_' + meshstr + ".obj";
// If the file doesn't exists, we have reached the end of the sim
if( !file_exists(objfile) ){
stop = true;
break;
}
// Load the deforming mesh
TriangleMesh *mesh = meshes[m].get();
if( !meshio::load_obj( mesh, objfile, false, false, false ) ){
std::cerr << "\n**arcsimeToAlembic Error: Failed to load " << objfile << "\n" << std::endl;
return false;
}
mesh->need_normals();
// Add it to the exporter
exporter.add_frame( deform_handles[m], &mesh->vertices[0][0], mesh->vertices.size(),
&mesh->faces[0][0], mesh->faces.size(), ccw_output );
} // end loop meshes
// Load all obstacle transforms
for( int o=0; o<n_obs && !stop; ++o ){
std::string meshstr = pad_leading_zeros(2,o);
std::string xformfile = dir + framestr + "obs" + meshstr + ".txt";
pugi::xml_document doc;
pugi::xml_parse_result result = doc.load_file(xformfile.c_str());
if( !result ){
std::cerr << "\n**arcsimeToAlembic Error: Unable to load " << xformfile << std::endl;
return false;
}
TriangleMesh *mesh = obstacles[o].get();
Eigen::AlignedBox<float,3> aabb = obs_aabb[o];
Vec3f obs_center = aabb.center();
pugi::xml_node::iterator node_iter = doc.first_child();
for( ; node_iter != doc.end(); node_iter++ ){
pugi::xml_node curr_node = *node_iter;
std::string name = curr_node.name();
XForm<float> xf; xf.setIdentity();
if( name == "rotate" ){
float angle = curr_node.attribute("angle").as_float() * (180.f/M_PI);
float x = curr_node.attribute("x").as_float();
float y = curr_node.attribute("y").as_float();
float z = curr_node.attribute("z").as_float();
// Translate obs to origin before rotation
XForm<float> xf0 = xform::make_trans<float>(-obs_center);
XForm<float> xf1 = xform::make_rot<float>( angle, Vec3f(x,y,z) );
XForm<float> xf2 = xform::make_trans<float>(obs_center);
xf = xf2 * xf1 * xf0;
}
else if( name == "scale" ){
float s = curr_node.attribute("value").as_float();
xf = xform::make_scale<float>(s,s,s);
}
else if( name == "translate" ){
float x = curr_node.attribute("x").as_float();
float y = curr_node.attribute("y").as_float();
float z = curr_node.attribute("z").as_float();
xf = xform::make_trans<float>(x,y,z);
}
mesh->apply_xform(xf);
} // end load xform
// Add it to the exporter
exporter.add_frame( obs_handles[o], &mesh->vertices[0][0], mesh->vertices.size(),
&mesh->faces[0][0], mesh->faces.size(), ccw_output );
} // end loop obstacles
return true;
}
