GitHub-Proxy/tinygltf
1
0
Fork 0
mirror of https://git.mirrors.martin98.com/https://github.com/syoyo/tinygltf.git synced 2025-09-13 07:23:15 +08:00
Code Issues Packages Projects Releases Wiki Activity

Initial support of node hierarchy.

Browse Source
This commit is contained in:
Syoyo Fujita 2016-11-23 17:59:17 +09:00
parent 9e2f479270
commit b21b24e072
1 changed files with 121 additions and 290 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

411
examples/alembic_to_gltf/abc2gltf.cc
View File

@ -229,6 +229,13 @@ class Scene
delete root_node; delete root_node;
root_node = NULL; root_node = NULL;
{
std::map<std::string, const Xform*>::const_iterator it(xform_map.begin());
for (; it != xform_map.end(); it++) {
delete it->second;
}
}
{ {
std::map<std::string, const Mesh*>::const_iterator it(mesh_map.begin()); std::map<std::string, const Mesh*>::const_iterator it(mesh_map.begin());
for (; it != mesh_map.end(); it++) { for (; it != mesh_map.end(); it++) {
@ -246,10 +253,13 @@ class Scene
} }
std::map<std::string, const Xform*> xform_map;
std::map<std::string, const Mesh*> mesh_map; std::map<std::string, const Mesh*> mesh_map;
std::map<std::string, const Curves*> curves_map; std::map<std::string, const Curves*> curves_map;
//std::map<std::string, Points> points_map; //std::map<std::string, Points> points_map;
std::map<std::string, int> id_map;
const Node* root_node; const Node* root_node;
//std::map<std::string, Node*> node_map; //std::map<std::string, Node*> node_map;
@ -714,7 +724,7 @@ static void VisitObjectAndExtractNode(Node* node_out, std::stringstream& ss, con
std::cout << " # of samples = " << ps.getNumSamples() << std::endl; std::cout << " # of samples = " << ps.getNumSamples() << std::endl;
if (ps.getNumSamples() > 0) { if (ps.getNumSamples() > 0) {
Curves curves; Curves *curves = new Curves();
ps.get(psample, samplesel); ps.get(psample, samplesel);
const size_t num_curves = psample.getNumCurves(); const size_t num_curves = psample.getNumCurves();
@ -730,10 +740,10 @@ static void VisitObjectAndExtractNode(Node* node_out, std::stringstream& ss, con
if (orders) std::cout << " # of orders= " << orders->size() << std::endl; if (orders) std::cout << " # of orders= " << orders->size() << std::endl;
std::cout << " # of nvs= " << num_vertices->size() << std::endl; std::cout << " # of nvs= " << num_vertices->size() << std::endl;
curves.points.resize(3 * P->size()); curves->points.resize(3 * P->size());
memcpy(curves.points.data(), P->get(), sizeof(float) * 3 * P->size()); memcpy(curves->points.data(), P->get(), sizeof(float) * 3 * P->size());
#if 1 #if 0
for (size_t k = 0; k < P->size(); k++) { for (size_t k = 0; k < P->size(); k++) {
std::cout << "P[" << k << "] " << (*P)[k].x << ", " << (*P)[k].y << ", " << (*P)[k].z << std::endl; std::cout << "P[" << k << "] " << (*P)[k].x << ", " << (*P)[k].y << ", " << (*P)[k].z << std::endl;
} }
@ -756,10 +766,12 @@ static void VisitObjectAndExtractNode(Node* node_out, std::stringstream& ss, con
#endif #endif
if (num_vertices) { if (num_vertices) {
curves.nverts.resize(num_vertices->size()); curves->nverts.resize(num_vertices->size());
memcpy(curves.nverts.data(), num_vertices->get(), sizeof(int) * num_vertices->size()); memcpy(curves->nverts.data(), num_vertices->get(), sizeof(int) * num_vertices->size());
} }
node = curves;
} else { } else {
std::cout << "Warning: # of samples = 0" << std::endl; std::cout << "Warning: # of samples = 0" << std::endl;
} }
@ -779,9 +791,10 @@ static void VisitObjectAndExtractNode(Node* node_out, std::stringstream& ss, con
} }
} }
static bool ConvertNodeToGLTF(picojson::object *out, const Node *node) static bool ConvertNodeToGLTF(picojson::object *out, const Scene &scene, const Node *node)
{ {
assert(node);
assert(!node->name.empty()); assert(!node->name.empty());
// FIXME(syoyo): Add serialization method for each class. // FIXME(syoyo): Add serialization method for each class.
@ -802,7 +815,21 @@ static bool ConvertNodeToGLTF(picojson::object *out, const Node *node)
if (xform->children.size() > 0) { if (xform->children.size() > 0) {
for (size_t i = 0; i < xform->children.size(); i++) { for (size_t i = 0; i < xform->children.size(); i++) {
if (dynamic_cast<const Mesh*>(xform->children[i])) { if (dynamic_cast<const Mesh*>(xform->children[i])) {
json_meshes.push_back(picojson::value(xform->children[i]->name)); std::map<std::string, int>::const_iterator it = scene.id_map.find(xform->children[i]->name);
assert(it != scene.id_map.end());
std::stringstream ss;
ss << "_" << it->second;
const std::string prefix = ss.str();
json_meshes.push_back(picojson::value(std::string("mesh") + prefix));
} else if (dynamic_cast<const Curves*>(xform->children[i])) {
std::map<std::string, int>::const_iterator it = scene.id_map.find(xform->children[i]->name);
assert(it != scene.id_map.end());
std::stringstream ss;
ss << "_" << it->second;
const std::string prefix = ss.str();
json_meshes.push_back(picojson::value(std::string("mesh") + prefix));
} }
} }
if (json_meshes.size() > 0) { if (json_meshes.size() > 0) {
@ -813,8 +840,11 @@ static bool ConvertNodeToGLTF(picojson::object *out, const Node *node)
picojson::array json_children; picojson::array json_children;
if (xform->children.size() > 0) { if (xform->children.size() > 0) {
for (size_t i = 0; i < xform->children.size(); i++) { for (size_t i = 0; i < xform->children.size(); i++) {
picojson::object json_child_node; if (xform->children[i]) {
ConvertNodeToGLTF(&json_child_node, xform->children[i]); picojson::object json_child_node;
ConvertNodeToGLTF(&json_child_node, scene, xform->children[i]);
json_children.push_back(picojson::value(json_child_node));
}
} }
json_node["children"] = picojson::value(json_children); json_node["children"] = picojson::value(json_children);
@ -832,12 +862,13 @@ static bool ConvertSceneToGLTF(picojson::object *out, const Scene &scene)
{ {
assert(scene.root_node); assert(scene.root_node);
// Nodes
picojson::object nodes; picojson::object nodes;
picojson::array node_names; picojson::array node_names;
{ {
picojson::object node; picojson::object node;
ConvertNodeToGLTF(&node, scene.root_node); ConvertNodeToGLTF(&node, scene, scene.root_node);
nodes[scene.root_node->name] = picojson::value(node); nodes[scene.root_node->name] = picojson::value(node);
node_names.push_back(picojson::value(scene.root_node->name)); node_names.push_back(picojson::value(scene.root_node->name));
@ -869,25 +900,14 @@ static bool ConvertSceneToGLTF(picojson::object *out, const Scene &scene)
return true; return true;
} }
#if 0 static bool ConvertMeshToGLTF(picojson::object *buffers_out, picojson::object *buffer_views_out, picojson::object *meshes_out, picojson::object *accessors_out, const Mesh& mesh, const int id)
static bool SaveMeshToGLTF(const std::string& output_filename, {
const Mesh& mesh) { std::stringstream prefix_ss;
picojson::object root; prefix_ss << "_" << id;
const std::string prefix = prefix_ss.str();
{ {
picojson::object asset;
asset["generator"] = picojson::value("abc2gltf");
asset["premultipliedAlpha"] = picojson::value(true);
asset["version"] = picojson::value(static_cast<double>(1));
picojson::object profile;
profile["api"] = picojson::value("WebGL");
profile["version"] = picojson::value("1.0.2");
asset["profile"] = picojson::value(profile);
root["assets"] = picojson::value(asset);
}
{
picojson::object buffers;
{ {
std::string vertices_b64data = base64_encode(reinterpret_cast<unsigned char const*>(mesh.vertices.data()), mesh.vertices.size() * sizeof(float)); std::string vertices_b64data = base64_encode(reinterpret_cast<unsigned char const*>(mesh.vertices.data()), mesh.vertices.size() * sizeof(float));
picojson::object buf; picojson::object buf;
@ -898,7 +918,7 @@ static bool SaveMeshToGLTF(const std::string& output_filename,
buf["byteLength"] = buf["byteLength"] =
picojson::value(static_cast<double>(mesh.vertices.size() * sizeof(float))); picojson::value(static_cast<double>(mesh.vertices.size() * sizeof(float)));
buffers["vertices"] = picojson::value(buf); (*buffers_out)["vertices" + prefix] = picojson::value(buf);
} }
{ {
std::string faces_b64data = base64_encode(reinterpret_cast<unsigned char const*>(mesh.faces.data()), mesh.faces.size() * sizeof(unsigned int)); std::string faces_b64data = base64_encode(reinterpret_cast<unsigned char const*>(mesh.faces.data()), mesh.faces.size() * sizeof(unsigned int));
@ -910,46 +930,43 @@ static bool SaveMeshToGLTF(const std::string& output_filename,
buf["byteLength"] = buf["byteLength"] =
picojson::value(static_cast<double>(mesh.faces.size() * sizeof(unsigned int))); picojson::value(static_cast<double>(mesh.faces.size() * sizeof(unsigned int)));
buffers["indices"] = picojson::value(buf); (*buffers_out)["indices" + prefix] = picojson::value(buf);
} }
root["buffers"] = picojson::value(buffers);
} }
{ {
picojson::object buffer_views;
{ {
picojson::object buffer_view_vertices; picojson::object buffer_view_vertices;
buffer_view_vertices["buffer"] = picojson::value(std::string("vertices")); buffer_view_vertices["buffer"] = picojson::value(std::string("vertices") + prefix);
buffer_view_vertices["byteLength"] = picojson::value(static_cast<double>(mesh.vertices.size() * sizeof(float))); buffer_view_vertices["byteLength"] = picojson::value(static_cast<double>(mesh.vertices.size() * sizeof(float)));
buffer_view_vertices["byteOffset"] = picojson::value(static_cast<double>(0)); buffer_view_vertices["byteOffset"] = picojson::value(static_cast<double>(0));
buffer_view_vertices["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ARRAY_BUFFER)); buffer_view_vertices["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ARRAY_BUFFER));
buffer_views["bufferView_vertices"] = picojson::value(buffer_view_vertices); (*buffer_views_out)["bufferView_vertices" + prefix] = picojson::value(buffer_view_vertices);
} }
{ {
picojson::object buffer_view_indices; picojson::object buffer_view_indices;
buffer_view_indices["buffer"] = picojson::value(std::string("indices")); buffer_view_indices["buffer"] = picojson::value(std::string("indices") + prefix);
buffer_view_indices["byteLength"] = picojson::value(static_cast<double>(mesh.faces.size() * sizeof(unsigned int))); buffer_view_indices["byteLength"] = picojson::value(static_cast<double>(mesh.faces.size() * sizeof(unsigned int)));
buffer_view_indices["byteOffset"] = picojson::value(static_cast<double>(0)); buffer_view_indices["byteOffset"] = picojson::value(static_cast<double>(0));
buffer_view_indices["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER)); buffer_view_indices["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER));
buffer_views["bufferView_indices"] = picojson::value(buffer_view_indices); (*buffer_views_out)["bufferView_indices" + prefix] = picojson::value(buffer_view_indices);
} }
root["bufferViews"] = picojson::value(buffer_views);
} }
{ {
picojson::object attributes; picojson::object attributes;
attributes["POSITION"] = picojson::value(std::string("accessor_vertices")); attributes["POSITION"] = picojson::value(std::string("accessor_vertices") + prefix);
picojson::object primitive; picojson::object primitive;
primitive["attributes"] = picojson::value(attributes); primitive["attributes"] = picojson::value(attributes);
primitive["indices"] = picojson::value("accessor_indices"); primitive["indices"] = picojson::value("accessor_indices" + prefix);
primitive["material"] = picojson::value("material_1"); primitive["material"] = picojson::value("material_1"); // FIXME(syoyo): Assign material.
primitive["mode"] = picojson::value(static_cast<int64_t>(TINYGLTF_MODE_TRIANGLES)); primitive["mode"] = picojson::value(static_cast<int64_t>(TINYGLTF_MODE_TRIANGLES));
picojson::array primitive_array; picojson::array primitive_array;
@ -959,10 +976,8 @@ static bool SaveMeshToGLTF(const std::string& output_filename,
m["primitives"] = picojson::value(primitive_array); m["primitives"] = picojson::value(primitive_array);
picojson::object meshes; picojson::object meshes;
meshes["mesh_1"] = picojson::value(m); (*meshes_out)["mesh" + prefix] = picojson::value(m);
root["meshes"] = picojson::value(meshes);
} }
{ {
@ -970,67 +985,33 @@ static bool SaveMeshToGLTF(const std::string& output_filename,
picojson::object accessor_vertices; picojson::object accessor_vertices;
picojson::object accessor_indices; picojson::object accessor_indices;
accessor_vertices["bufferView"] = picojson::value(std::string("bufferView_vertices")); accessor_vertices["bufferView"] = picojson::value(std::string("bufferView_vertices" + prefix));
accessor_vertices["byteOffset"] = picojson::value(static_cast<int64_t>(0)); accessor_vertices["byteOffset"] = picojson::value(static_cast<int64_t>(0));
accessor_vertices["byteStride"] = picojson::value(static_cast<double>(3 * sizeof(float))); accessor_vertices["byteStride"] = picojson::value(static_cast<double>(3 * sizeof(float)));
accessor_vertices["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_FLOAT)); accessor_vertices["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_FLOAT));
accessor_vertices["count"] = picojson::value(static_cast<int64_t>(mesh.vertices.size())); accessor_vertices["count"] = picojson::value(static_cast<int64_t>(mesh.vertices.size()));
accessor_vertices["type"] = picojson::value(std::string("VEC3")); accessor_vertices["type"] = picojson::value(std::string("VEC3"));
accessors["accessor_vertices"] = picojson::value(accessor_vertices); (*accessors_out)["accessor_vertices" + prefix] = picojson::value(accessor_vertices);
accessor_indices["bufferView"] = picojson::value(std::string("bufferView_indices")); accessor_indices["bufferView"] = picojson::value(std::string("bufferView_indices" + prefix));
accessor_indices["byteOffset"] = picojson::value(static_cast<int64_t>(0)); accessor_indices["byteOffset"] = picojson::value(static_cast<int64_t>(0));
accessor_indices["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT)); accessor_indices["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT));
accessor_indices["count"] = picojson::value(static_cast<int64_t>(mesh.faces.size())); accessor_indices["count"] = picojson::value(static_cast<int64_t>(mesh.faces.size()));
accessor_indices["type"] = picojson::value(std::string("SCALAR")); accessor_indices["type"] = picojson::value(std::string("SCALAR"));
accessors["accessor_indices"] = picojson::value(accessor_indices); (*accessors_out)["accessor_indices" + prefix] = picojson::value(accessor_indices);
root["accessors"] = picojson::value(accessors);
} }
{
// Use Default Material(Do not supply `material.technique`)
picojson::object default_material;
picojson::object materials;
materials["material_1"] = picojson::value(default_material);
root["materials"] = picojson::value(materials);
}
std::ofstream ifs(output_filename.c_str());
if (ifs.bad()) {
std::cerr << "Failed to open " << output_filename << std::endl;
return false;
}
picojson::value v = picojson::value(root);
std::string s = v.serialize(/* pretty */true);
ifs.write(s.data(), static_cast<ssize_t>(s.size()));
ifs.close();
return true; return true;
} }
static bool SaveCurvesToGLTF(const std::string& output_filename, static bool ConvertCurvesToGLTF(picojson::object *buffers_out, picojson::object *buffer_views_out, picojson::object *meshes_out, picojson::object *accessors_out, const Curves& curves, const int id)
const Curves& curves) { {
picojson::object root; std::stringstream prefix_ss;
prefix_ss << "_" << id;
const std::string prefix = prefix_ss.str();
{ {
picojson::object asset;
asset["generator"] = picojson::value("abc2gltf");
asset["premultipliedAlpha"] = picojson::value(true);
asset["version"] = picojson::value(static_cast<double>(1));
picojson::object profile;
profile["api"] = picojson::value("WebGL");
profile["version"] = picojson::value("1.0.2");
asset["profile"] = picojson::value(profile);
root["assets"] = picojson::value(asset);
}
{
picojson::object buffers;
{ {
{ {
std::string b64data = base64_encode(reinterpret_cast<unsigned char const*>(curves.points.data()), curves.points.size() * sizeof(float)); std::string b64data = base64_encode(reinterpret_cast<unsigned char const*>(curves.points.data()), curves.points.size() * sizeof(float));
@ -1042,7 +1023,7 @@ static bool SaveCurvesToGLTF(const std::string& output_filename,
buf["byteLength"] = buf["byteLength"] =
picojson::value(static_cast<double>(curves.points.size() * sizeof(float))); picojson::value(static_cast<double>(curves.points.size() * sizeof(float)));
buffers["points"] = picojson::value(buf); (*buffers_out)["points" + prefix] = picojson::value(buf);
} }
// Out extension // Out extension
@ -1056,44 +1037,41 @@ static bool SaveCurvesToGLTF(const std::string& output_filename,
buf["byteLength"] = buf["byteLength"] =
picojson::value(static_cast<double>(curves.nverts.size() * sizeof(int))); picojson::value(static_cast<double>(curves.nverts.size() * sizeof(int)));
buffers["nverts"] = picojson::value(buf); (*buffers_out)["nverts" + prefix] = picojson::value(buf);
} }
} }
root["buffers"] = picojson::value(buffers);
} }
{ {
picojson::object buffer_views;
{ {
{ {
picojson::object buffer_view_points; picojson::object buffer_view_points;
buffer_view_points["buffer"] = picojson::value(std::string("points")); buffer_view_points["buffer"] = picojson::value(std::string("points") + prefix);
buffer_view_points["byteLength"] = picojson::value(static_cast<double>(curves.points.size() * sizeof(float))); buffer_view_points["byteLength"] = picojson::value(static_cast<double>(curves.points.size() * sizeof(float)));
buffer_view_points["byteOffset"] = picojson::value(static_cast<double>(0)); buffer_view_points["byteOffset"] = picojson::value(static_cast<double>(0));
buffer_view_points["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ARRAY_BUFFER)); buffer_view_points["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ARRAY_BUFFER));
buffer_views["bufferView_points"] = picojson::value(buffer_view_points); (*buffer_views_out)["bufferView_points" + prefix] = picojson::value(buffer_view_points);
} }
{ {
picojson::object buffer_view_nverts; picojson::object buffer_view_nverts;
buffer_view_nverts["buffer"] = picojson::value(std::string("nverts")); buffer_view_nverts["buffer"] = picojson::value(std::string("nverts") + prefix);
buffer_view_nverts["byteLength"] = picojson::value(static_cast<double>(curves.nverts.size() * sizeof(int))); buffer_view_nverts["byteLength"] = picojson::value(static_cast<double>(curves.nverts.size() * sizeof(int)));
buffer_view_nverts["byteOffset"] = picojson::value(static_cast<double>(0)); buffer_view_nverts["byteOffset"] = picojson::value(static_cast<double>(0));
buffer_view_nverts["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ARRAY_BUFFER)); buffer_view_nverts["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ARRAY_BUFFER));
buffer_views["bufferView_nverts"] = picojson::value(buffer_view_nverts); (*buffer_views_out)["bufferView_nverts" + prefix] = picojson::value(buffer_view_nverts);
} }
} }
root["bufferViews"] = picojson::value(buffer_views);
} }
{ {
picojson::object attributes; picojson::object attributes;
attributes["POSITION"] = picojson::value(std::string("accessor_points")); attributes["POSITION"] = picojson::value(std::string("accessor_points") + prefix);
attributes["NVERTS"] = picojson::value(std::string("accessor_nverts")); attributes["NVERTS"] = picojson::value(std::string("accessor_nverts") + prefix);
// Extra information for curves primtive. // Extra information for curves primtive.
picojson::object extra; picojson::object extra;
@ -1114,108 +1092,37 @@ static bool SaveCurvesToGLTF(const std::string& output_filename,
m["primitives"] = picojson::value(primitive_array); m["primitives"] = picojson::value(primitive_array);
picojson::object meshes; picojson::object meshes;
meshes["mesh_1"] = picojson::value(m); (*meshes_out)["mesh" + prefix] = picojson::value(m);
root["meshes"] = picojson::value(meshes);
} }
{ {
picojson::object accessors;
{ {
picojson::object accessor_points; picojson::object accessor_points;
accessor_points["bufferView"] = picojson::value(std::string("bufferView_points")); accessor_points["bufferView"] = picojson::value(std::string("bufferView_points") + prefix);
accessor_points["byteOffset"] = picojson::value(static_cast<int64_t>(0)); accessor_points["byteOffset"] = picojson::value(static_cast<int64_t>(0));
accessor_points["byteStride"] = picojson::value(static_cast<double>(3 * sizeof(float))); accessor_points["byteStride"] = picojson::value(static_cast<double>(3 * sizeof(float)));
accessor_points["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_FLOAT)); accessor_points["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_FLOAT));
accessor_points["count"] = picojson::value(static_cast<int64_t>(curves.points.size())); accessor_points["count"] = picojson::value(static_cast<int64_t>(curves.points.size()));
accessor_points["type"] = picojson::value(std::string("VEC3")); accessor_points["type"] = picojson::value(std::string("VEC3"));
accessors["accessor_points"] = picojson::value(accessor_points); (*accessors_out)["accessor_points" + prefix] = picojson::value(accessor_points);
} }
{ {
picojson::object accessor_nverts; picojson::object accessor_nverts;
accessor_nverts["bufferView"] = picojson::value(std::string("bufferView_nverts")); accessor_nverts["bufferView"] = picojson::value(std::string("bufferView_nverts") + prefix);
accessor_nverts["byteOffset"] = picojson::value(static_cast<int64_t>(0)); accessor_nverts["byteOffset"] = picojson::value(static_cast<int64_t>(0));
accessor_nverts["byteStride"] = picojson::value(static_cast<double>(sizeof(int))); accessor_nverts["byteStride"] = picojson::value(static_cast<double>(sizeof(int)));
accessor_nverts["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_INT)); accessor_nverts["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_INT));
accessor_nverts["count"] = picojson::value(static_cast<int64_t>(curves.nverts.size())); accessor_nverts["count"] = picojson::value(static_cast<int64_t>(curves.nverts.size()));
accessor_nverts["type"] = picojson::value(std::string("SCALAR")); accessor_nverts["type"] = picojson::value(std::string("SCALAR"));
accessors["accessor_nverts"] = picojson::value(accessor_nverts); (*accessors_out)["accessor_nverts" + prefix] = picojson::value(accessor_nverts);
} }
picojson::object accessor_indices;
root["accessors"] = picojson::value(accessors);
} }
{
// Use Default Material(Do not supply `material.technique`)
picojson::object default_material;
picojson::object materials;
materials["material_1"] = picojson::value(default_material);
root["materials"] = picojson::value(materials);
}
{
picojson::object nodes;
picojson::object node;
picojson::array meshes;
meshes.push_back(picojson::value(std::string("mesh_1")));
node["meshes"] = picojson::value(meshes);
nodes["node_1"] = picojson::value(node);
root["nodes"] = picojson::value(nodes);
}
{
picojson::object defaultScene;
picojson::array nodes;
nodes.push_back(picojson::value(std::string("node_1")));
defaultScene["nodes"] = picojson::value(nodes);
root["scene"] = picojson::value("defaultScene");
picojson::object scenes;
scenes["defaultScene"] = picojson::value(defaultScene);
root["scenes"] = picojson::value(scenes);
}
// @todo {}
picojson::object shaders;
picojson::object programs;
picojson::object techniques;
picojson::object materials;
picojson::object skins;
root["shaders"] = picojson::value(shaders);
root["programs"] = picojson::value(programs);
root["techniques"] = picojson::value(techniques);
root["materials"] = picojson::value(materials);
root["skins"] = picojson::value(skins);
std::ofstream ifs(output_filename.c_str());
if (ifs.bad()) {
std::cerr << "Failed to open " << output_filename << std::endl;
return false;
}
picojson::value v = picojson::value(root);
std::string s = v.serialize(/* pretty */true);
ifs.write(s.data(), static_cast<ssize_t>(s.size()));
ifs.close();
return true; return true;
} }
#endif
static bool SaveSceneToGLTF(const std::string& output_filename, static bool SaveSceneToGLTF(const std::string& output_filename,
const Scene& scene) { const Scene& scene) {
@ -1236,112 +1143,46 @@ static bool SaveSceneToGLTF(const std::string& output_filename,
root["assets"] = picojson::value(asset); root["assets"] = picojson::value(asset);
} }
// Mesh picojson::object buffers;
picojson::object buffer_views;
picojson::object meshes; picojson::object meshes;
picojson::object accessors;
// PolyMesh
std::map<std::string, const Mesh*>::const_iterator mesh_it(scene.mesh_map.begin()); std::map<std::string, const Mesh*>::const_iterator mesh_it(scene.mesh_map.begin());
for (; mesh_it != scene.mesh_map.end(); mesh_it++) { for (; mesh_it != scene.mesh_map.end(); mesh_it++) {
const Mesh& mesh = *(mesh_it->second); const Mesh& mesh = *(mesh_it->second);
{ assert(scene.id_map.find(mesh.name) != scene.id_map.end());
picojson::object buffers;
{
std::string vertices_b64data = base64_encode(reinterpret_cast<unsigned char const*>(mesh.vertices.data()), mesh.vertices.size() * sizeof(float));
picojson::object buf;
buf["type"] = picojson::value("arraybuffer"); const int id = (scene.id_map.find(mesh.name))->second;
buf["uri"] = picojson::value(
std::string("data:application/octet-stream;base64,") + vertices_b64data);
buf["byteLength"] =
picojson::value(static_cast<double>(mesh.vertices.size() * sizeof(float)));
buffers["vertices"] = picojson::value(buf);
}
{
std::string faces_b64data = base64_encode(reinterpret_cast<unsigned char const*>(mesh.faces.data()), mesh.faces.size() * sizeof(unsigned int));
picojson::object buf;
buf["type"] = picojson::value("arraybuffer"); bool ret = ConvertMeshToGLTF(&buffers, &buffer_views, &meshes, &accessors, mesh, id);
buf["uri"] = picojson::value( assert(ret);
std::string("data:application/octet-stream;base64,") + faces_b64data); (void)ret;
buf["byteLength"] =
picojson::value(static_cast<double>(mesh.faces.size() * sizeof(unsigned int)));
buffers["indices"] = picojson::value(buf);
}
root["buffers"] = picojson::value(buffers);
}
{
picojson::object buffer_views;
{
picojson::object buffer_view_vertices;
buffer_view_vertices["buffer"] = picojson::value(std::string("vertices"));
buffer_view_vertices["byteLength"] = picojson::value(static_cast<double>(mesh.vertices.size() * sizeof(float)));
buffer_view_vertices["byteOffset"] = picojson::value(static_cast<double>(0));
buffer_view_vertices["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ARRAY_BUFFER));
buffer_views["bufferView_vertices"] = picojson::value(buffer_view_vertices);
}
{
picojson::object buffer_view_indices;
buffer_view_indices["buffer"] = picojson::value(std::string("indices"));
buffer_view_indices["byteLength"] = picojson::value(static_cast<double>(mesh.faces.size() * sizeof(unsigned int)));
buffer_view_indices["byteOffset"] = picojson::value(static_cast<double>(0));
buffer_view_indices["target"] = picojson::value(static_cast<int64_t>(TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER));
buffer_views["bufferView_indices"] = picojson::value(buffer_view_indices);
}
root["bufferViews"] = picojson::value(buffer_views);
}
{
picojson::object attributes;
attributes["POSITION"] = picojson::value(std::string("accessor_vertices"));
picojson::object primitive;
primitive["attributes"] = picojson::value(attributes);
primitive["indices"] = picojson::value("accessor_indices");
primitive["material"] = picojson::value("material_1");
primitive["mode"] = picojson::value(static_cast<int64_t>(TINYGLTF_MODE_TRIANGLES));
picojson::array primitive_array;
primitive_array.push_back(picojson::value(primitive));
picojson::object m;
m["primitives"] = picojson::value(primitive_array);
meshes[mesh.name] = picojson::value(m);
}
{
picojson::object accessors;
picojson::object accessor_vertices;
picojson::object accessor_indices;
accessor_vertices["bufferView"] = picojson::value(std::string("bufferView_vertices"));
accessor_vertices["byteOffset"] = picojson::value(static_cast<int64_t>(0));
accessor_vertices["byteStride"] = picojson::value(static_cast<double>(3 * sizeof(float)));
accessor_vertices["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_FLOAT));
accessor_vertices["count"] = picojson::value(static_cast<int64_t>(mesh.vertices.size()));
accessor_vertices["type"] = picojson::value(std::string("VEC3"));
accessors["accessor_vertices"] = picojson::value(accessor_vertices);
accessor_indices["bufferView"] = picojson::value(std::string("bufferView_indices"));
accessor_indices["byteOffset"] = picojson::value(static_cast<int64_t>(0));
accessor_indices["componentType"] = picojson::value(static_cast<int64_t>(TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT));
accessor_indices["count"] = picojson::value(static_cast<int64_t>(mesh.faces.size()));
accessor_indices["type"] = picojson::value(std::string("SCALAR"));
accessors["accessor_indices"] = picojson::value(accessor_indices);
root["accessors"] = picojson::value(accessors);
}
} }
// Curves
std::map<std::string, const Curves*>::const_iterator curves_it(scene.curves_map.begin());
for (; curves_it != scene.curves_map.end(); curves_it++) {
const Curves& curves = *(curves_it->second);
assert(scene.id_map.find(curves_it->first) != scene.id_map.end());
const int id = (scene.id_map.find(curves.name))->second;
std::cout << "Curves: " << curves.name << std::endl;
bool ret = ConvertCurvesToGLTF(&buffers, &buffer_views, &meshes, &accessors, curves, id);
assert(ret);
(void)ret;
}
root["buffers"] = picojson::value(buffers);
root["bufferViews"] = picojson::value(buffer_views);
root["meshes"] = picojson::value(meshes); root["meshes"] = picojson::value(meshes);
root["accessors"] = picojson::value(accessors);
{ {
// Use Default Material(Do not supply `material.technique`) // Use Default Material(Do not supply `material.technique`)
@ -1370,25 +1211,9 @@ static bool SaveSceneToGLTF(const std::string& output_filename,
return true; return true;
} }
#if 0
// Flatten multiple Curves object to one Curves.
static void FlattenCurves(Curves *flatten_curves, const Scene &scene)
{
flatten_curves->name = "flatten_curves";
std::map<std::string, Curves*>::const_iterator it(scene.curves_map.begin());
std::map<std::string, Curves*>::const_iterator itEnd(scene.curves_map.end());
for (; it != itEnd; it++) {
const Curves &curves = it->second;
std::copy(curves.points.begin(), curves.points.end(), std::back_inserter(flatten_curves->points));
std::copy(curves.nverts.begin(), curves.nverts.end(), std::back_inserter(flatten_curves->nverts));
}
}
#endif
// Flatten node tree. // Flatten node tree.
static void ConvertNodeToScene(Scene *scene, const Node *node) // Also assign ID for each graphics primitive.
static void ConvertNodeToScene(Scene *scene, int *id, const Node *node)
{ {
if (!node) return; if (!node) return;
@ -1400,18 +1225,23 @@ static void ConvertNodeToScene(Scene *scene, const Node *node)
scene->root_node = node; scene->root_node = node;
} else { } else {
// Assume child xform node // Assume child xform node
assert(scene->xform_map.find(node->name) == scene->xform_map.end());
scene->xform_map[node->name] = dynamic_cast<const Xform*>(node);
//scene->id_map[node->name] = (*id)++;
} }
} else if (dynamic_cast<const Mesh *>(node)) { } else if (dynamic_cast<const Mesh *>(node)) {
assert(scene->mesh_map.find(node->name) == scene->mesh_map.end()); assert(scene->mesh_map.find(node->name) == scene->mesh_map.end());
scene->mesh_map[node->name] = dynamic_cast<const Mesh*>(node); scene->mesh_map[node->name] = dynamic_cast<const Mesh*>(node);
scene->id_map[node->name] = (*id)++;
} else if (dynamic_cast<const Curves *>(node)) { } else if (dynamic_cast<const Curves *>(node)) {
assert(scene->curves_map.find(node->name) == scene->curves_map.end()); assert(scene->curves_map.find(node->name) == scene->curves_map.end());
scene->curves_map[node->name] = dynamic_cast<const Curves*>(node); scene->curves_map[node->name] = dynamic_cast<const Curves*>(node);
scene->id_map[node->name] = (*id)++;
} }
for (size_t i = 0; i < node->children.size(); i++) { for (size_t i = 0; i < node->children.size(); i++) {
ConvertNodeToScene(scene, node->children[i]); ConvertNodeToScene(scene, id, node->children[i]);
} }
} }
@ -1442,7 +1272,8 @@ int main(int argc, char** argv) {
//std::cout << ss.str() << std::endl; //std::cout << ss.str() << std::endl;
ConvertNodeToScene(&scene, node); int id = 1; // ID starts from 1.
ConvertNodeToScene(&scene, &id, node);
delete node; delete node;
SaveSceneToGLTF(gltf_filename, scene); SaveSceneToGLTF(gltf_filename, scene);