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gltf_document.cpp
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gltf_document.cpp
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/*************************************************************************/
/* gltf_document.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "gltf_document.h"
#include "gltf_accessor.h"
#include "gltf_animation.h"
#include "gltf_camera.h"
#include "gltf_light.h"
#include "gltf_node.h"
#include "gltf_skeleton.h"
#include "gltf_skin.h"
#include "gltf_spec_gloss.h"
#include "gltf_state.h"
#include "gltf_texture.h"
#include <stdio.h>
#include <stdlib.h>
#include "thirdparty/misc/rjm_texbleed.h"
#include "core/core_bind.h"
#include "core/crypto/crypto_core.h"
#include "core/io/json.h"
#include "core/math/disjoint_set.h"
#include "core/os/file_access.h"
#include "core/variant/typed_array.h"
#include "core/version.h"
#include "core/version_hash.gen.h"
#include "drivers/png/png_driver_common.h"
#include "editor/import/resource_importer_scene.h"
#include "modules/csg/csg_shape.h"
#include "modules/gridmap/grid_map.h"
#include "modules/regex/regex.h"
#include "scene/2d/node_2d.h"
#include "scene/3d/bone_attachment_3d.h"
#include "scene/3d/camera_3d.h"
#include "scene/3d/mesh_instance_3d.h"
#include "scene/3d/multimesh_instance_3d.h"
#include "scene/3d/node_3d.h"
#include "scene/3d/skeleton_3d.h"
#include "scene/animation/animation_player.h"
#include "scene/resources/surface_tool.h"
#include <limits>
Error GLTFDocument::serialize(Ref<GLTFState> state, const String &p_path) {
uint64_t begin_time = OS::get_singleton()->get_ticks_usec();
/* STEP 1 SERIALIZE CAMERAS */
Error err = _serialize_cameras(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 2 CREATE SKINS */
err = _serialize_skins(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 3 CREATE BONE ATTACHMENTS */
err = _serialize_bone_attachment(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 4 SERIALIZE MESHES (we have enough info now) */
err = _serialize_meshes(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 5 SERIALIZE TEXTURES */
err = _serialize_materials(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 6 SERIALIZE IMAGES */
err = _serialize_images(state, p_path);
if (err != OK) {
return Error::FAILED;
}
/* STEP 7 SERIALIZE TEXTURES */
err = _serialize_textures(state);
if (err != OK) {
return Error::FAILED;
}
// /* STEP 8 SERIALIZE ANIMATIONS */
err = _serialize_animations(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 9 SERIALIZE ACCESSORS */
err = _encode_accessors(state);
if (err != OK) {
return Error::FAILED;
}
for (GLTFBufferViewIndex i = 0; i < state->buffer_views.size(); i++) {
state->buffer_views.write[i]->buffer = 0;
}
/* STEP 10 SERIALIZE BUFFER VIEWS */
err = _encode_buffer_views(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 11 SERIALIZE NODES */
err = _serialize_nodes(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 12 SERIALIZE SCENE */
err = _serialize_scenes(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 13 SERIALIZE SCENE */
err = _serialize_lights(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 14 SERIALIZE EXTENSIONS */
err = _serialize_extensions(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 15 SERIALIZE VERSION */
err = _serialize_version(state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 16 SERIALIZE FILE */
err = _serialize_file(state, p_path);
if (err != OK) {
return Error::FAILED;
}
uint64_t elapsed = OS::get_singleton()->get_ticks_usec() - begin_time;
float elapsed_sec = double(elapsed) / 1000000.0;
elapsed_sec = Math::stepify(elapsed_sec, 0.01f);
print_line("glTF: Export time elapsed seconds " + rtos(elapsed_sec));
return OK;
}
Error GLTFDocument::_serialize_extensions(Ref<GLTFState> state) const {
const String texture_transform = "KHR_texture_transform";
const String punctual_lights = "KHR_lights_punctual";
Array extensions_used;
extensions_used.push_back(punctual_lights);
extensions_used.push_back(texture_transform);
state->json["extensionsUsed"] = extensions_used;
Array extensions_required;
extensions_required.push_back(texture_transform);
state->json["extensionsRequired"] = extensions_required;
return OK;
}
Error GLTFDocument::_serialize_scenes(Ref<GLTFState> state) {
Array scenes;
const int loaded_scene = 0;
state->json["scene"] = loaded_scene;
if (state->nodes.size()) {
Dictionary s;
if (!state->scene_name.empty()) {
s["name"] = state->scene_name;
}
Array nodes;
nodes.push_back(0);
s["nodes"] = nodes;
scenes.push_back(s);
}
state->json["scenes"] = scenes;
return OK;
}
Error GLTFDocument::_parse_json(const String &p_path, Ref<GLTFState> state) {
Error err;
FileAccessRef f = FileAccess::open(p_path, FileAccess::READ, &err);
if (!f) {
return err;
}
Vector<uint8_t> array;
array.resize(f->get_len());
f->get_buffer(array.ptrw(), array.size());
String text;
text.parse_utf8((const char *)array.ptr(), array.size());
String err_txt;
int err_line;
Variant v;
err = JSON::parse(text, v, err_txt, err_line);
if (err != OK) {
_err_print_error("", p_path.utf8().get_data(), err_line, err_txt.utf8().get_data(), ERR_HANDLER_SCRIPT);
return err;
}
state->json = v;
return OK;
}
Error GLTFDocument::_serialize_bone_attachment(Ref<GLTFState> state) {
for (int skeleton_i = 0; skeleton_i < state->skeletons.size(); skeleton_i++) {
for (int attachment_i = 0; attachment_i < state->skeletons[skeleton_i]->bone_attachments.size(); attachment_i++) {
BoneAttachment3D *bone_attachment = state->skeletons[skeleton_i]->bone_attachments[attachment_i];
String bone_name = bone_attachment->get_bone_name();
bone_name = _sanitize_bone_name(bone_name);
int32_t bone = state->skeletons[skeleton_i]->godot_skeleton->find_bone(bone_name);
ERR_CONTINUE(bone == -1);
for (int skin_i = 0; skin_i < state->skins.size(); skin_i++) {
if (state->skins[skin_i]->skeleton != skeleton_i) {
continue;
}
for (int node_i = 0; node_i < bone_attachment->get_child_count(); node_i++) {
ERR_CONTINUE(bone >= state->skins[skin_i]->joints.size());
_convert_scene_node(state, bone_attachment->get_child(node_i), bone_attachment->get_owner(), state->skins[skin_i]->joints[bone], 0);
}
break;
}
}
}
return OK;
}
Error GLTFDocument::_parse_glb(const String &p_path, Ref<GLTFState> state) {
Error err;
FileAccessRef f = FileAccess::open(p_path, FileAccess::READ, &err);
if (!f) {
return err;
}
uint32_t magic = f->get_32();
ERR_FAIL_COND_V(magic != 0x46546C67, ERR_FILE_UNRECOGNIZED); //glTF
f->get_32(); // version
f->get_32(); // length
uint32_t chunk_length = f->get_32();
uint32_t chunk_type = f->get_32();
ERR_FAIL_COND_V(chunk_type != 0x4E4F534A, ERR_PARSE_ERROR); //JSON
Vector<uint8_t> json_data;
json_data.resize(chunk_length);
uint32_t len = f->get_buffer(json_data.ptrw(), chunk_length);
ERR_FAIL_COND_V(len != chunk_length, ERR_FILE_CORRUPT);
String text;
text.parse_utf8((const char *)json_data.ptr(), json_data.size());
String err_txt;
int err_line;
Variant v;
err = JSON::parse(text, v, err_txt, err_line);
if (err != OK) {
_err_print_error("", p_path.utf8().get_data(), err_line, err_txt.utf8().get_data(), ERR_HANDLER_SCRIPT);
return err;
}
state->json = v;
//data?
chunk_length = f->get_32();
chunk_type = f->get_32();
if (f->eof_reached()) {
return OK; //all good
}
ERR_FAIL_COND_V(chunk_type != 0x004E4942, ERR_PARSE_ERROR); //BIN
state->glb_data.resize(chunk_length);
len = f->get_buffer(state->glb_data.ptrw(), chunk_length);
ERR_FAIL_COND_V(len != chunk_length, ERR_FILE_CORRUPT);
return OK;
}
static Array _vec3_to_arr(const Vector3 &p_vec3) {
Array array;
array.resize(3);
array[0] = p_vec3.x;
array[1] = p_vec3.y;
array[2] = p_vec3.z;
return array;
}
static Vector3 _arr_to_vec3(const Array &p_array) {
ERR_FAIL_COND_V(p_array.size() != 3, Vector3());
return Vector3(p_array[0], p_array[1], p_array[2]);
}
static Array _quat_to_array(const Quat &p_quat) {
Array array;
array.resize(4);
array[0] = p_quat.x;
array[1] = p_quat.y;
array[2] = p_quat.z;
array[3] = p_quat.w;
return array;
}
static Quat _arr_to_quat(const Array &p_array) {
ERR_FAIL_COND_V(p_array.size() != 4, Quat());
return Quat(p_array[0], p_array[1], p_array[2], p_array[3]);
}
static Transform _arr_to_xform(const Array &p_array) {
ERR_FAIL_COND_V(p_array.size() != 16, Transform());
Transform xform;
xform.basis.set_axis(Vector3::AXIS_X, Vector3(p_array[0], p_array[1], p_array[2]));
xform.basis.set_axis(Vector3::AXIS_Y, Vector3(p_array[4], p_array[5], p_array[6]));
xform.basis.set_axis(Vector3::AXIS_Z, Vector3(p_array[8], p_array[9], p_array[10]));
xform.set_origin(Vector3(p_array[12], p_array[13], p_array[14]));
return xform;
}
static Vector<real_t> _xform_to_array(const Transform p_transform) {
Vector<real_t> array;
array.resize(16);
Vector3 axis_x = p_transform.get_basis().get_axis(Vector3::AXIS_X);
array.write[0] = axis_x.x;
array.write[1] = axis_x.y;
array.write[2] = axis_x.z;
array.write[3] = 0.0f;
Vector3 axis_y = p_transform.get_basis().get_axis(Vector3::AXIS_Y);
array.write[4] = axis_y.x;
array.write[5] = axis_y.y;
array.write[6] = axis_y.z;
array.write[7] = 0.0f;
Vector3 axis_z = p_transform.get_basis().get_axis(Vector3::AXIS_Z);
array.write[8] = axis_z.x;
array.write[9] = axis_z.y;
array.write[10] = axis_z.z;
array.write[11] = 0.0f;
Vector3 origin = p_transform.get_origin();
array.write[12] = origin.x;
array.write[13] = origin.y;
array.write[14] = origin.z;
array.write[15] = 1.0f;
return array;
}
Error GLTFDocument::_serialize_nodes(Ref<GLTFState> state) {
Array nodes;
for (int i = 0; i < state->nodes.size(); i++) {
Dictionary node;
Ref<GLTFNode> n = state->nodes[i];
Dictionary extensions;
node["extensions"] = extensions;
if (!n->get_name().empty()) {
node["name"] = n->get_name();
}
if (n->camera != -1) {
node["camera"] = n->camera;
}
if (n->light != -1) {
Dictionary lights_punctual;
extensions["KHR_lights_punctual"] = lights_punctual;
lights_punctual["light"] = n->light;
}
if (n->mesh != -1) {
node["mesh"] = n->mesh;
}
if (n->skin != -1) {
node["skin"] = n->skin;
}
if (n->skeleton != -1 && n->skin < 0) {
}
if (n->xform != Transform()) {
node["matrix"] = _xform_to_array(n->xform);
}
if (!n->rotation.is_equal_approx(Quat())) {
node["rotation"] = _quat_to_array(n->rotation);
}
if (!n->scale.is_equal_approx(Vector3(1.0f, 1.0f, 1.0f))) {
node["scale"] = _vec3_to_arr(n->scale);
}
if (!n->translation.is_equal_approx(Vector3())) {
node["translation"] = _vec3_to_arr(n->translation);
}
if (n->children.size()) {
Array children;
for (int j = 0; j < n->children.size(); j++) {
children.push_back(n->children[j]);
}
node["children"] = children;
}
nodes.push_back(node);
}
state->json["nodes"] = nodes;
return OK;
}
String GLTFDocument::_sanitize_scene_name(const String &name) {
RegEx regex("([^a-zA-Z0-9_ -]+)");
String p_name = regex.sub(name, "", true);
return p_name;
}
String GLTFDocument::_gen_unique_name(Ref<GLTFState> state, const String &p_name) {
const String s_name = _sanitize_scene_name(p_name);
String name;
int index = 1;
while (true) {
name = s_name;
if (index > 1) {
name += " " + itos(index);
}
if (!state->unique_names.has(name)) {
break;
}
index++;
}
state->unique_names.insert(name);
return name;
}
String GLTFDocument::_sanitize_bone_name(const String &name) {
String p_name = name.camelcase_to_underscore(true);
RegEx pattern_nocolon(":");
p_name = pattern_nocolon.sub(p_name, "_", true);
RegEx pattern_noslash("/");
p_name = pattern_noslash.sub(p_name, "_", true);
RegEx pattern_nospace(" +");
p_name = pattern_nospace.sub(p_name, "_", true);
RegEx pattern_multiple("_+");
p_name = pattern_multiple.sub(p_name, "_", true);
RegEx pattern_padded("0+(\\d+)");
p_name = pattern_padded.sub(p_name, "$1", true);
return p_name;
}
String GLTFDocument::_gen_unique_bone_name(Ref<GLTFState> state, const GLTFSkeletonIndex skel_i, const String &p_name) {
String s_name = _sanitize_bone_name(p_name);
if (s_name.empty()) {
s_name = "bone";
}
String name;
int index = 1;
while (true) {
name = s_name;
if (index > 1) {
name += "_" + itos(index);
}
if (!state->skeletons[skel_i]->unique_names.has(name)) {
break;
}
index++;
}
state->skeletons.write[skel_i]->unique_names.insert(name);
return name;
}
Error GLTFDocument::_parse_scenes(Ref<GLTFState> state) {
ERR_FAIL_COND_V(!state->json.has("scenes"), ERR_FILE_CORRUPT);
const Array &scenes = state->json["scenes"];
int loaded_scene = 0;
if (state->json.has("scene")) {
loaded_scene = state->json["scene"];
} else {
WARN_PRINT("The load-time scene is not defined in the glTF2 file. Picking the first scene.");
}
if (scenes.size()) {
ERR_FAIL_COND_V(loaded_scene >= scenes.size(), ERR_FILE_CORRUPT);
const Dictionary &s = scenes[loaded_scene];
ERR_FAIL_COND_V(!s.has("nodes"), ERR_UNAVAILABLE);
const Array &nodes = s["nodes"];
for (int j = 0; j < nodes.size(); j++) {
state->root_nodes.push_back(nodes[j]);
}
if (s.has("name") && s["name"] != "") {
state->scene_name = _gen_unique_name(state, s["name"]);
} else {
state->scene_name = _gen_unique_name(state, "Scene");
}
}
return OK;
}
Error GLTFDocument::_parse_nodes(Ref<GLTFState> state) {
ERR_FAIL_COND_V(!state->json.has("nodes"), ERR_FILE_CORRUPT);
const Array &nodes = state->json["nodes"];
for (int i = 0; i < nodes.size(); i++) {
Ref<GLTFNode> node;
node.instance();
const Dictionary &n = nodes[i];
if (n.has("name")) {
node->set_name(n["name"]);
}
if (n.has("camera")) {
node->camera = n["camera"];
}
if (n.has("mesh")) {
node->mesh = n["mesh"];
}
if (n.has("skin")) {
node->skin = n["skin"];
}
if (n.has("matrix")) {
node->xform = _arr_to_xform(n["matrix"]);
} else {
if (n.has("translation")) {
node->translation = _arr_to_vec3(n["translation"]);
}
if (n.has("rotation")) {
node->rotation = _arr_to_quat(n["rotation"]);
}
if (n.has("scale")) {
node->scale = _arr_to_vec3(n["scale"]);
}
node->xform.basis.set_quat_scale(node->rotation, node->scale);
node->xform.origin = node->translation;
}
if (n.has("extensions")) {
Dictionary extensions = n["extensions"];
if (extensions.has("KHR_lights_punctual")) {
Dictionary lights_punctual = extensions["KHR_lights_punctual"];
if (lights_punctual.has("light")) {
GLTFLightIndex light = lights_punctual["light"];
node->light = light;
}
}
}
if (n.has("children")) {
const Array &children = n["children"];
for (int j = 0; j < children.size(); j++) {
node->children.push_back(children[j]);
}
}
state->nodes.push_back(node);
}
// build the hierarchy
for (GLTFNodeIndex node_i = 0; node_i < state->nodes.size(); node_i++) {
for (int j = 0; j < state->nodes[node_i]->children.size(); j++) {
GLTFNodeIndex child_i = state->nodes[node_i]->children[j];
ERR_FAIL_INDEX_V(child_i, state->nodes.size(), ERR_FILE_CORRUPT);
ERR_CONTINUE(state->nodes[child_i]->parent != -1); //node already has a parent, wtf.
state->nodes.write[child_i]->parent = node_i;
}
}
_compute_node_heights(state);
return OK;
}
void GLTFDocument::_compute_node_heights(Ref<GLTFState> state) {
state->root_nodes.clear();
for (GLTFNodeIndex node_i = 0; node_i < state->nodes.size(); ++node_i) {
Ref<GLTFNode> node = state->nodes[node_i];
node->height = 0;
GLTFNodeIndex current_i = node_i;
while (current_i >= 0) {
const GLTFNodeIndex parent_i = state->nodes[current_i]->parent;
if (parent_i >= 0) {
++node->height;
}
current_i = parent_i;
}
if (node->height == 0) {
state->root_nodes.push_back(node_i);
}
}
}
static Vector<uint8_t> _parse_base64_uri(const String &uri) {
int start = uri.find(",");
ERR_FAIL_COND_V(start == -1, Vector<uint8_t>());
CharString substr = uri.right(start + 1).ascii();
int strlen = substr.length();
Vector<uint8_t> buf;
buf.resize(strlen / 4 * 3 + 1 + 1);
size_t len = 0;
ERR_FAIL_COND_V(CryptoCore::b64_decode(buf.ptrw(), buf.size(), &len, (unsigned char *)substr.get_data(), strlen) != OK, Vector<uint8_t>());
buf.resize(len);
return buf;
}
Error GLTFDocument::_encode_buffer_glb(Ref<GLTFState> state, const String &p_path) {
print_verbose("glTF: Total buffers: " + itos(state->buffers.size()));
if (!state->buffers.size()) {
return OK;
}
Array buffers;
if (state->buffers.size()) {
Vector<uint8_t> buffer_data = state->buffers[0];
Dictionary gltf_buffer;
gltf_buffer["byteLength"] = buffer_data.size();
buffers.push_back(gltf_buffer);
}
for (GLTFBufferIndex i = 1; i < state->buffers.size() - 1; i++) {
Vector<uint8_t> buffer_data = state->buffers[i];
Dictionary gltf_buffer;
String filename = p_path.get_basename().get_file() + itos(i) + ".bin";
String path = p_path.get_base_dir() + "/" + filename;
Error err;
FileAccessRef f = FileAccess::open(path, FileAccess::WRITE, &err);
if (!f) {
return err;
}
if (buffer_data.size() == 0) {
return OK;
}
f->create(FileAccess::ACCESS_RESOURCES);
f->store_buffer(buffer_data.ptr(), buffer_data.size());
f->close();
gltf_buffer["uri"] = filename;
gltf_buffer["byteLength"] = buffer_data.size();
buffers.push_back(gltf_buffer);
}
state->json["buffers"] = buffers;
return OK;
}
Error GLTFDocument::_encode_buffer_bins(Ref<GLTFState> state, const String &p_path) {
print_verbose("glTF: Total buffers: " + itos(state->buffers.size()));
if (!state->buffers.size()) {
return OK;
}
Array buffers;
for (GLTFBufferIndex i = 0; i < state->buffers.size(); i++) {
Vector<uint8_t> buffer_data = state->buffers[i];
Dictionary gltf_buffer;
String filename = p_path.get_basename().get_file() + itos(i) + ".bin";
String path = p_path.get_base_dir() + "/" + filename;
Error err;
FileAccessRef f = FileAccess::open(path, FileAccess::WRITE, &err);
if (!f) {
return err;
}
if (buffer_data.size() == 0) {
return OK;
}
f->create(FileAccess::ACCESS_RESOURCES);
f->store_buffer(buffer_data.ptr(), buffer_data.size());
f->close();
gltf_buffer["uri"] = filename;
gltf_buffer["byteLength"] = buffer_data.size();
buffers.push_back(gltf_buffer);
}
state->json["buffers"] = buffers;
return OK;
}
Error GLTFDocument::_parse_buffers(Ref<GLTFState> state, const String &p_base_path) {
if (!state->json.has("buffers")) {
return OK;
}
const Array &buffers = state->json["buffers"];
for (GLTFBufferIndex i = 0; i < buffers.size(); i++) {
if (i == 0 && state->glb_data.size()) {
state->buffers.push_back(state->glb_data);
} else {
const Dictionary &buffer = buffers[i];
if (buffer.has("uri")) {
Vector<uint8_t> buffer_data;
String uri = buffer["uri"];
if (uri.begins_with("data:")) { // Embedded data using base64.
// Validate data MIME types and throw an error if it's one we don't know/support.
if (!uri.begins_with("data:application/octet-stream;base64") &&
!uri.begins_with("data:application/gltf-buffer;base64")) {
ERR_PRINT("glTF: Got buffer with an unknown URI data type: " + uri);
}
buffer_data = _parse_base64_uri(uri);
} else { // Relative path to an external image file.
uri = p_base_path.plus_file(uri).replace("\\", "/"); // Fix for Windows.
buffer_data = FileAccess::get_file_as_array(uri);
ERR_FAIL_COND_V_MSG(buffer.size() == 0, ERR_PARSE_ERROR, "glTF: Couldn't load binary file as an array: " + uri);
}
ERR_FAIL_COND_V(!buffer.has("byteLength"), ERR_PARSE_ERROR);
int byteLength = buffer["byteLength"];
ERR_FAIL_COND_V(byteLength < buffer_data.size(), ERR_PARSE_ERROR);
state->buffers.push_back(buffer_data);
}
}
}
print_verbose("glTF: Total buffers: " + itos(state->buffers.size()));
return OK;
}
Error GLTFDocument::_encode_buffer_views(Ref<GLTFState> state) {
Array buffers;
for (GLTFBufferViewIndex i = 0; i < state->buffer_views.size(); i++) {
Dictionary d;
Ref<GLTFBufferView> buffer_view = state->buffer_views[i];
d["buffer"] = buffer_view->buffer;
d["byteLength"] = buffer_view->byte_length;
d["byteOffset"] = buffer_view->byte_offset;
if (buffer_view->byte_stride != -1) {
d["byteStride"] = buffer_view->byte_stride;
}
// TODO Sparse
// d["target"] = buffer_view->indices;
ERR_FAIL_COND_V(!d.has("buffer"), ERR_INVALID_DATA);
ERR_FAIL_COND_V(!d.has("byteLength"), ERR_INVALID_DATA);
buffers.push_back(d);
}
print_verbose("glTF: Total buffer views: " + itos(state->buffer_views.size()));
state->json["bufferViews"] = buffers;
return OK;
}
Error GLTFDocument::_parse_buffer_views(Ref<GLTFState> state) {
ERR_FAIL_COND_V(!state->json.has("bufferViews"), ERR_FILE_CORRUPT);
const Array &buffers = state->json["bufferViews"];
for (GLTFBufferViewIndex i = 0; i < buffers.size(); i++) {
const Dictionary &d = buffers[i];
Ref<GLTFBufferView> buffer_view;
buffer_view.instance();
ERR_FAIL_COND_V(!d.has("buffer"), ERR_PARSE_ERROR);
buffer_view->buffer = d["buffer"];
ERR_FAIL_COND_V(!d.has("byteLength"), ERR_PARSE_ERROR);
buffer_view->byte_length = d["byteLength"];
if (d.has("byteOffset")) {
buffer_view->byte_offset = d["byteOffset"];
}
if (d.has("byteStride")) {
buffer_view->byte_stride = d["byteStride"];
}
if (d.has("target")) {
const int target = d["target"];
buffer_view->indices = target == GLTFDocument::ELEMENT_ARRAY_BUFFER;
}
state->buffer_views.push_back(buffer_view);
}
print_verbose("glTF: Total buffer views: " + itos(state->buffer_views.size()));
return OK;
}
Error GLTFDocument::_encode_accessors(Ref<GLTFState> state) {
Array accessors;
for (GLTFAccessorIndex i = 0; i < state->accessors.size(); i++) {
Dictionary d;
Ref<GLTFAccessor> accessor = state->accessors[i];
d["componentType"] = accessor->component_type;
d["count"] = accessor->count;
d["type"] = _get_accessor_type_name(accessor->type);
d["byteOffset"] = accessor->byte_offset;
d["max"] = accessor->max;
d["min"] = accessor->min;
d["bufferView"] = accessor->buffer_view; //optional because it may be sparse...
// Dictionary s;
// s["count"] = accessor->sparse_count;
// ERR_FAIL_COND_V(!s.has("count"), ERR_PARSE_ERROR);
// s["indices"] = accessor->sparse_accessors;
// ERR_FAIL_COND_V(!s.has("indices"), ERR_PARSE_ERROR);
// Dictionary si;
// si["bufferView"] = accessor->sparse_indices_buffer_view;
// ERR_FAIL_COND_V(!si.has("bufferView"), ERR_PARSE_ERROR);
// si["componentType"] = accessor->sparse_indices_component_type;
// if (si.has("byteOffset")) {
// si["byteOffset"] = accessor->sparse_indices_byte_offset;
// }
// ERR_FAIL_COND_V(!si.has("componentType"), ERR_PARSE_ERROR);
// s["indices"] = si;
// Dictionary sv;
// sv["bufferView"] = accessor->sparse_values_buffer_view;
// if (sv.has("byteOffset")) {
// sv["byteOffset"] = accessor->sparse_values_byte_offset;
// }
// ERR_FAIL_COND_V(!sv.has("bufferView"), ERR_PARSE_ERROR);
// s["values"] = sv;
// ERR_FAIL_COND_V(!s.has("values"), ERR_PARSE_ERROR);
// d["sparse"] = s;
accessors.push_back(d);
}
state->json["accessors"] = accessors;
ERR_FAIL_COND_V(!state->json.has("accessors"), ERR_FILE_CORRUPT);
print_verbose("glTF: Total accessors: " + itos(state->accessors.size()));
return OK;
}
String GLTFDocument::_get_accessor_type_name(const GLTFDocument::GLTFType p_type) {
if (p_type == GLTFDocument::TYPE_SCALAR) {
return "SCALAR";
}
if (p_type == GLTFDocument::TYPE_VEC2) {
return "VEC2";
}
if (p_type == GLTFDocument::TYPE_VEC3) {
return "VEC3";
}
if (p_type == GLTFDocument::TYPE_VEC4) {
return "VEC4";
}
if (p_type == GLTFDocument::TYPE_MAT2) {
return "MAT2";
}
if (p_type == GLTFDocument::TYPE_MAT3) {
return "MAT3";
}
if (p_type == GLTFDocument::TYPE_MAT4) {
return "MAT4";
}
ERR_FAIL_V("SCALAR");
}
GLTFDocument::GLTFType GLTFDocument::_get_type_from_str(const String &p_string) {
if (p_string == "SCALAR")
return GLTFDocument::TYPE_SCALAR;
if (p_string == "VEC2")
return GLTFDocument::TYPE_VEC2;
if (p_string == "VEC3")
return GLTFDocument::TYPE_VEC3;
if (p_string == "VEC4")
return GLTFDocument::TYPE_VEC4;
if (p_string == "MAT2")
return GLTFDocument::TYPE_MAT2;
if (p_string == "MAT3")
return GLTFDocument::TYPE_MAT3;
if (p_string == "MAT4")
return GLTFDocument::TYPE_MAT4;
ERR_FAIL_V(GLTFDocument::TYPE_SCALAR);
}
Error GLTFDocument::_parse_accessors(Ref<GLTFState> state) {
ERR_FAIL_COND_V(!state->json.has("accessors"), ERR_FILE_CORRUPT);
const Array &accessors = state->json["accessors"];
for (GLTFAccessorIndex i = 0; i < accessors.size(); i++) {
const Dictionary &d = accessors[i];
Ref<GLTFAccessor> accessor;
accessor.instance();
ERR_FAIL_COND_V(!d.has("componentType"), ERR_PARSE_ERROR);
accessor->component_type = d["componentType"];
ERR_FAIL_COND_V(!d.has("count"), ERR_PARSE_ERROR);
accessor->count = d["count"];
ERR_FAIL_COND_V(!d.has("type"), ERR_PARSE_ERROR);
accessor->type = _get_type_from_str(d["type"]);
if (d.has("bufferView")) {
accessor->buffer_view = d["bufferView"]; //optional because it may be sparse...
}
if (d.has("byteOffset")) {
accessor->byte_offset = d["byteOffset"];
}
if (d.has("max")) {
accessor->max = d["max"];
}
if (d.has("min")) {
accessor->min = d["min"];
}
if (d.has("sparse")) {
//eeh..
const Dictionary &s = d["sparse"];
ERR_FAIL_COND_V(!s.has("count"), ERR_PARSE_ERROR);
accessor->sparse_count = s["count"];
ERR_FAIL_COND_V(!s.has("indices"), ERR_PARSE_ERROR);
const Dictionary &si = s["indices"];
ERR_FAIL_COND_V(!si.has("bufferView"), ERR_PARSE_ERROR);
accessor->sparse_indices_buffer_view = si["bufferView"];
ERR_FAIL_COND_V(!si.has("componentType"), ERR_PARSE_ERROR);
accessor->sparse_indices_component_type = si["componentType"];
if (si.has("byteOffset")) {
accessor->sparse_indices_byte_offset = si["byteOffset"];
}
ERR_FAIL_COND_V(!s.has("values"), ERR_PARSE_ERROR);
const Dictionary &sv = s["values"];
ERR_FAIL_COND_V(!sv.has("bufferView"), ERR_PARSE_ERROR);
accessor->sparse_values_buffer_view = sv["bufferView"];
if (sv.has("byteOffset")) {
accessor->sparse_values_byte_offset = sv["byteOffset"];
}
}
state->accessors.push_back(accessor);
}
print_verbose("glTF: Total accessors: " + itos(state->accessors.size()));
return OK;
}