void Demo::create_arcball()
{
auto blinn_phong_program = programs.create(BLINNPHONG_VS, BLINNPHONG_FS);
auto shaded_pass = std::make_shared<gst::ShadedPass>(blinn_phong_program);
shaded_pass->set_cull_face(gst::CullFace::BACK);
shaded_pass->set_depth_test(true);
auto material = gst::Material::create_struct("material");
material.get_uniform("ambient") = glm::vec3(1.2f);
material.get_uniform("diffuse") = glm::vec3(0.8f);
material.get_uniform("specular") = glm::vec3(1.0f);
material.get_uniform("emission") = glm::vec3(0.0f);
material.get_uniform("shininess") = 21.0f;
gst::MeshFactory mesh_factory(logger);
auto suzanne = std::make_shared<gst::GroupNode>();
for (auto mesh : mesh_factory.create_from_file(SUZANNE_OBJ)) {
auto model = gst::Model(mesh, material, shaded_pass);
auto model_node = std::make_shared<gst::ModelNode>(model);
suzanne->add(model_node);
}
scene.add(suzanne);
arcball = Arcball(suzanne);
arcball.set_allow_constraints(true);
arcball_helper = ArcballHelper::create(programs);
arcball_helper.set_show_result(false);
}
/// create subdivided mesh
umdraw::UMMeshPtr create_subdivided_mesh(unsigned int level)
{
if (!mesh_) return umdraw::UMMeshPtr();
if (level == 0) return umdraw::UMMeshPtr();
// find from cache
if (divided_mesh_)
{
if (umdraw::UMMeshPtr result_mesh = create_result_mesh(divided_mesh_, level))
{
return result_mesh;
}
}
// initialize base mesh
if (!base_mesh_)
{
if (!init_base_mesh())
{
return umdraw::UMMeshPtr();
}
}
// get divided mesh
const int max_level = level;
OpenSubdiv::FarMeshFactory<UMSubdivVertex> mesh_factory(&(*base_mesh_), max_level);
divided_mesh_ = mesh_factory.Create();
if (divided_mesh_)
{
if (umdraw::UMMeshPtr result_mesh = create_result_mesh(divided_mesh_, level))
{
return result_mesh;
}
}
return umdraw::UMMeshPtr();
}
