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editor_scene_importer_gltf.cpp
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/*************************************************************************/
/* editor_scene_importer_gltf.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2018 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 "editor_scene_importer_gltf.h"
#include "io/json.h"
#include "math_defs.h"
#include "os/file_access.h"
#include "os/os.h"
#include "scene/3d/camera.h"
#include "scene/3d/mesh_instance.h"
#include "scene/animation/animation_player.h"
#include "scene/resources/surface_tool.h"
#include "thirdparty/misc/base64.h"
uint32_t EditorSceneImporterGLTF::get_import_flags() const {
return IMPORT_SCENE | IMPORT_ANIMATION;
}
void EditorSceneImporterGLTF::get_extensions(List<String> *r_extensions) const {
r_extensions->push_back("gltf");
r_extensions->push_back("glb");
}
Error EditorSceneImporterGLTF::_parse_json(const String &p_path, 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 EditorSceneImporterGLTF::_parse_glb(const String &p_path, 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 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 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;
}
String EditorSceneImporterGLTF::_gen_unique_name(GLTFState &state, const String &p_name) {
int index = 1;
String name;
while (true) {
name = p_name;
if (index > 1) {
name += " " + itos(index);
}
if (!state.unique_names.has(name)) {
break;
}
index++;
}
state.unique_names.insert(name);
return name;
}
Error EditorSceneImporterGLTF::_parse_scenes(GLTFState &state) {
ERR_FAIL_COND_V(!state.json.has("scenes"), ERR_FILE_CORRUPT);
Array scenes = state.json["scenes"];
for (int i = 0; i < 1; i++) { //only first scene is imported
Dictionary s = scenes[i];
ERR_FAIL_COND_V(!s.has("nodes"), ERR_UNAVAILABLE);
Array nodes = s["nodes"];
for (int j = 0; j < nodes.size(); j++) {
state.root_nodes.push_back(nodes[j]);
}
if (s.has("name")) {
state.scene_name = s["name"];
}
}
return OK;
}
Error EditorSceneImporterGLTF::_parse_nodes(GLTFState &state) {
ERR_FAIL_COND_V(!state.json.has("nodes"), ERR_FILE_CORRUPT);
Array nodes = state.json["nodes"];
for (int i = 0; i < nodes.size(); i++) {
GLTFNode *node = memnew(GLTFNode);
Dictionary n = nodes[i];
print_line("node " + itos(i) + ": " + String(Variant(n)));
if (n.has("name")) {
node->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 (!state.skin_users.has(node->skin)) {
state.skin_users[node->skin] = Vector<int>();
}
state.skin_users[node->skin].push_back(i);
*/
}
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 = Basis(node->rotation);
node->xform.basis.scale(node->scale);
node->xform.origin = node->translation;
}
if (n.has("children")) {
Array children = n["children"];
for (int i = 0; i < children.size(); i++) {
node->children.push_back(children[i]);
}
}
state.nodes.push_back(node);
}
//build the hierarchy
for (int i = 0; i < state.nodes.size(); i++) {
for (int j = 0; j < state.nodes[i]->children.size(); j++) {
int child = state.nodes[i]->children[j];
ERR_FAIL_INDEX_V(child, state.nodes.size(), ERR_FILE_CORRUPT);
ERR_CONTINUE(state.nodes[child]->parent != -1); //node already has a parent, wtf.
state.nodes[child]->parent = i;
}
}
return OK;
}
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);
int len = base64_decode((char *)buf.ptr(), (char *)substr.get_data(), strlen);
buf.resize(len);
return buf;
}
Error EditorSceneImporterGLTF::_parse_buffers(GLTFState &state, const String &p_base_path) {
if (!state.json.has("buffers"))
return OK;
Array buffers = state.json["buffers"];
for (int i = 0; i < buffers.size(); i++) {
if (i == 0 && state.glb_data.size()) {
state.buffers.push_back(state.glb_data);
} else {
Dictionary buffer = buffers[i];
if (buffer.has("uri")) {
Vector<uint8_t> buffer_data;
String uri = buffer["uri"];
if (uri.findn("data:application/octet-stream;base64") == 0) {
//embedded data
buffer_data = _parse_base64_uri(uri);
} else {
uri = p_base_path.plus_file(uri).replace("\\", "/"); //fix for windows
buffer_data = FileAccess::get_file_as_array(uri);
ERR_FAIL_COND_V(buffer.size() == 0, ERR_PARSE_ERROR);
}
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_line("total buffers: " + itos(state.buffers.size()));
return OK;
}
Error EditorSceneImporterGLTF::_parse_buffer_views(GLTFState &state) {
ERR_FAIL_COND_V(!state.json.has("bufferViews"), ERR_FILE_CORRUPT);
Array buffers = state.json["bufferViews"];
for (int i = 0; i < buffers.size(); i++) {
Dictionary d = buffers[i];
GLTFBufferView buffer_view;
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")) {
int target = d["target"];
buffer_view.indices = target == ELEMENT_ARRAY_BUFFER;
}
state.buffer_views.push_back(buffer_view);
}
print_line("total buffer views: " + itos(state.buffer_views.size()));
return OK;
}
EditorSceneImporterGLTF::GLTFType EditorSceneImporterGLTF::_get_type_from_str(const String &p_string) {
if (p_string == "SCALAR")
return TYPE_SCALAR;
if (p_string == "VEC2")
return TYPE_VEC2;
if (p_string == "VEC3")
return TYPE_VEC3;
if (p_string == "VEC4")
return TYPE_VEC4;
if (p_string == "MAT2")
return TYPE_MAT2;
if (p_string == "MAT3")
return TYPE_MAT3;
if (p_string == "MAT4")
return TYPE_MAT4;
ERR_FAIL_V(TYPE_SCALAR);
}
Error EditorSceneImporterGLTF::_parse_accessors(GLTFState &state) {
ERR_FAIL_COND_V(!state.json.has("accessors"), ERR_FILE_CORRUPT);
Array accessors = state.json["accessors"];
for (int i = 0; i < accessors.size(); i++) {
Dictionary d = accessors[i];
GLTFAccessor accessor;
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..
Dictionary s = d["sparse"];
ERR_FAIL_COND_V(!d.has("count"), ERR_PARSE_ERROR);
accessor.sparse_count = d["count"];
ERR_FAIL_COND_V(!d.has("indices"), ERR_PARSE_ERROR);
Dictionary si = d["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(!d.has("values"), ERR_PARSE_ERROR);
Dictionary sv = d["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_line("total accessors: " + itos(state.accessors.size()));
return OK;
}
String EditorSceneImporterGLTF::_get_component_type_name(uint32_t p_component) {
switch (p_component) {
case COMPONENT_TYPE_BYTE: return "Byte";
case COMPONENT_TYPE_UNSIGNED_BYTE: return "UByte";
case COMPONENT_TYPE_SHORT: return "Short";
case COMPONENT_TYPE_UNSIGNED_SHORT: return "UShort";
case COMPONENT_TYPE_INT: return "Int";
case COMPONENT_TYPE_FLOAT: return "Float";
}
return "<Error>";
}
String EditorSceneImporterGLTF::_get_type_name(GLTFType p_component) {
static const char *names[] = {
"float",
"vec2",
"vec3",
"vec4",
"mat2",
"mat3",
"mat4"
};
return names[p_component];
}
Error EditorSceneImporterGLTF::_decode_buffer_view(GLTFState &state, int p_buffer_view, double *dst, int skip_every, int skip_bytes, int element_size, int count, GLTFType type, int component_count, int component_type, int component_size, bool normalized, int byte_offset, bool for_vertex) {
const GLTFBufferView &bv = state.buffer_views[p_buffer_view];
int stride = bv.byte_stride ? bv.byte_stride : element_size;
if (for_vertex && stride % 4) {
stride += 4 - (stride % 4); //according to spec must be multiple of 4
}
ERR_FAIL_INDEX_V(bv.buffer, state.buffers.size(), ERR_PARSE_ERROR);
uint32_t offset = bv.byte_offset + byte_offset;
Vector<uint8_t> buffer = state.buffers[bv.buffer]; //copy on write, so no performance hit
const uint8_t *bufptr = buffer.ptr();
//use to debug
//print_line("type " + _get_type_name(type) + " component type: " + _get_component_type_name(component_type) + " stride: " + itos(stride) + " amount " + itos(count));
print_line("accessor offset" + itos(byte_offset) + " view offset: " + itos(bv.byte_offset) + " total buffer len: " + itos(buffer.size()) + " view len " + itos(bv.byte_length));
int buffer_end = (stride * (count - 1)) + element_size;
ERR_FAIL_COND_V(buffer_end > bv.byte_length, ERR_PARSE_ERROR);
ERR_FAIL_COND_V((int)(offset + buffer_end) > buffer.size(), ERR_PARSE_ERROR);
//fill everything as doubles
for (int i = 0; i < count; i++) {
const uint8_t *src = &bufptr[offset + i * stride];
for (int j = 0; j < component_count; j++) {
if (skip_every && j > 0 && (j % skip_every) == 0) {
src += skip_bytes;
}
double d = 0;
switch (component_type) {
case COMPONENT_TYPE_BYTE: {
int8_t b = int8_t(*src);
if (normalized) {
d = (double(b) / 128.0);
} else {
d = double(b);
}
} break;
case COMPONENT_TYPE_UNSIGNED_BYTE: {
uint8_t b = *src;
if (normalized) {
d = (double(b) / 255.0);
} else {
d = double(b);
}
} break;
case COMPONENT_TYPE_SHORT: {
int16_t s = *(int16_t *)src;
if (normalized) {
d = (double(s) / 32768.0);
} else {
d = double(s);
}
} break;
case COMPONENT_TYPE_UNSIGNED_SHORT: {
uint16_t s = *(uint16_t *)src;
if (normalized) {
d = (double(s) / 65535.0);
} else {
d = double(s);
}
} break;
case COMPONENT_TYPE_INT: {
d = *(int *)src;
} break;
case COMPONENT_TYPE_FLOAT: {
d = *(float *)src;
} break;
}
*dst++ = d;
src += component_size;
}
}
return OK;
}
int EditorSceneImporterGLTF::_get_component_type_size(int component_type) {
switch (component_type) {
case COMPONENT_TYPE_BYTE: return 1; break;
case COMPONENT_TYPE_UNSIGNED_BYTE: return 1; break;
case COMPONENT_TYPE_SHORT: return 2; break;
case COMPONENT_TYPE_UNSIGNED_SHORT: return 2; break;
case COMPONENT_TYPE_INT: return 4; break;
case COMPONENT_TYPE_FLOAT: return 4; break;
default: { ERR_FAIL_V(0); }
}
return 0;
}
Vector<double> EditorSceneImporterGLTF::_decode_accessor(GLTFState &state, int p_accessor, bool p_for_vertex) {
//spec, for reference:
//https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#data-alignment
ERR_FAIL_INDEX_V(p_accessor, state.accessors.size(), Vector<double>());
const GLTFAccessor &a = state.accessors[p_accessor];
int component_count_for_type[7] = {
1, 2, 3, 4, 4, 9, 16
};
int component_count = component_count_for_type[a.type];
int component_size = _get_component_type_size(a.component_type);
ERR_FAIL_COND_V(component_size == 0, Vector<double>());
int element_size = component_count * component_size;
int skip_every = 0;
int skip_bytes = 0;
//special case of alignments, as described in spec
switch (a.component_type) {
case COMPONENT_TYPE_BYTE:
case COMPONENT_TYPE_UNSIGNED_BYTE: {
if (a.type == TYPE_MAT2) {
skip_every = 2;
skip_bytes = 2;
element_size = 8; //override for this case
}
if (a.type == TYPE_MAT3) {
skip_every = 3;
skip_bytes = 1;
element_size = 12; //override for this case
}
} break;
case COMPONENT_TYPE_SHORT:
case COMPONENT_TYPE_UNSIGNED_SHORT: {
if (a.type == TYPE_MAT3) {
skip_every = 6;
skip_bytes = 4;
element_size = 16; //override for this case
}
} break;
default: {}
}
Vector<double> dst_buffer;
dst_buffer.resize(component_count * a.count);
double *dst = dst_buffer.ptrw();
if (a.buffer_view >= 0) {
ERR_FAIL_INDEX_V(a.buffer_view, state.buffer_views.size(), Vector<double>());
Error err = _decode_buffer_view(state, a.buffer_view, dst, skip_every, skip_bytes, element_size, a.count, a.type, component_count, a.component_type, component_size, a.normalized, a.byte_offset, p_for_vertex);
if (err != OK)
return Vector<double>();
} else {
//fill with zeros, as bufferview is not defined.
for (int i = 0; i < (a.count * component_count); i++) {
dst_buffer[i] = 0;
}
}
if (a.sparse_count > 0) {
// I could not find any file using this, so this code is so far untested
Vector<double> indices;
indices.resize(a.sparse_count);
int indices_component_size = _get_component_type_size(a.sparse_indices_component_type);
Error err = _decode_buffer_view(state, a.sparse_indices_buffer_view, indices.ptrw(), 0, 0, indices_component_size, a.sparse_count, TYPE_SCALAR, 1, a.sparse_indices_component_type, indices_component_size, false, a.sparse_indices_byte_offset, false);
if (err != OK)
return Vector<double>();
Vector<double> data;
data.resize(component_count * a.sparse_count);
err = _decode_buffer_view(state, a.sparse_values_buffer_view, data.ptrw(), skip_every, skip_bytes, element_size, a.sparse_count, a.type, component_count, a.component_type, component_size, a.normalized, a.sparse_values_byte_offset, p_for_vertex);
if (err != OK)
return Vector<double>();
for (int i = 0; i < indices.size(); i++) {
int write_offset = int(indices[i]) * component_count;
for (int j = 0; j < component_count; j++) {
dst[write_offset + j] = data[i * component_count + j];
}
}
}
return dst_buffer;
}
PoolVector<int> EditorSceneImporterGLTF::_decode_accessor_as_ints(GLTFState &state, int p_accessor, bool p_for_vertex) {
Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
PoolVector<int> ret;
if (attribs.size() == 0)
return ret;
const double *attribs_ptr = attribs.ptr();
int ret_size = attribs.size();
ret.resize(ret_size);
{
PoolVector<int>::Write w = ret.write();
for (int i = 0; i < ret_size; i++) {
w[i] = int(attribs_ptr[i]);
}
}
return ret;
}
PoolVector<float> EditorSceneImporterGLTF::_decode_accessor_as_floats(GLTFState &state, int p_accessor, bool p_for_vertex) {
Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
PoolVector<float> ret;
if (attribs.size() == 0)
return ret;
const double *attribs_ptr = attribs.ptr();
int ret_size = attribs.size();
ret.resize(ret_size);
{
PoolVector<float>::Write w = ret.write();
for (int i = 0; i < ret_size; i++) {
w[i] = float(attribs_ptr[i]);
}
}
return ret;
}
PoolVector<Vector2> EditorSceneImporterGLTF::_decode_accessor_as_vec2(GLTFState &state, int p_accessor, bool p_for_vertex) {
Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
PoolVector<Vector2> ret;
if (attribs.size() == 0)
return ret;
ERR_FAIL_COND_V(attribs.size() % 2 != 0, ret);
const double *attribs_ptr = attribs.ptr();
int ret_size = attribs.size() / 2;
ret.resize(ret_size);
{
PoolVector<Vector2>::Write w = ret.write();
for (int i = 0; i < ret_size; i++) {
w[i] = Vector2(attribs_ptr[i * 2 + 0], attribs_ptr[i * 2 + 1]);
}
}
return ret;
}
PoolVector<Vector3> EditorSceneImporterGLTF::_decode_accessor_as_vec3(GLTFState &state, int p_accessor, bool p_for_vertex) {
Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
PoolVector<Vector3> ret;
if (attribs.size() == 0)
return ret;
ERR_FAIL_COND_V(attribs.size() % 3 != 0, ret);
const double *attribs_ptr = attribs.ptr();
int ret_size = attribs.size() / 3;
ret.resize(ret_size);
{
PoolVector<Vector3>::Write w = ret.write();
for (int i = 0; i < ret_size; i++) {
w[i] = Vector3(attribs_ptr[i * 3 + 0], attribs_ptr[i * 3 + 1], attribs_ptr[i * 3 + 2]);
}
}
return ret;
}
PoolVector<Color> EditorSceneImporterGLTF::_decode_accessor_as_color(GLTFState &state, int p_accessor, bool p_for_vertex) {
Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
PoolVector<Color> ret;
if (attribs.size() == 0)
return ret;
int type = state.accessors[p_accessor].type;
ERR_FAIL_COND_V(!(type == TYPE_VEC3 || type == TYPE_VEC4), ret);
int components;
if (type == TYPE_VEC3) {
components = 3;
} else { // TYPE_VEC4
components = 4;
}
ERR_FAIL_COND_V(attribs.size() % components != 0, ret);
const double *attribs_ptr = attribs.ptr();
int ret_size = attribs.size() / components;
ret.resize(ret_size);
{
PoolVector<Color>::Write w = ret.write();
for (int i = 0; i < ret_size; i++) {
w[i] = Color(attribs_ptr[i * 4 + 0], attribs_ptr[i * 4 + 1], attribs_ptr[i * 4 + 2], components == 4 ? attribs_ptr[i * 4 + 3] : 1.0);
}
}
return ret;
}
Vector<Quat> EditorSceneImporterGLTF::_decode_accessor_as_quat(GLTFState &state, int p_accessor, bool p_for_vertex) {
Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
Vector<Quat> ret;
if (attribs.size() == 0)
return ret;
ERR_FAIL_COND_V(attribs.size() % 4 != 0, ret);
const double *attribs_ptr = attribs.ptr();
int ret_size = attribs.size() / 4;
ret.resize(ret_size);
{
for (int i = 0; i < ret_size; i++) {
ret[i] = Quat(attribs_ptr[i * 4 + 0], attribs_ptr[i * 4 + 1], attribs_ptr[i * 4 + 2], attribs_ptr[i * 4 + 3]);
}
}
return ret;
}
Vector<Transform2D> EditorSceneImporterGLTF::_decode_accessor_as_xform2d(GLTFState &state, int p_accessor, bool p_for_vertex) {
Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
Vector<Transform2D> ret;
if (attribs.size() == 0)
return ret;
ERR_FAIL_COND_V(attribs.size() % 4 != 0, ret);
ret.resize(attribs.size() / 4);
for (int i = 0; i < ret.size(); i++) {
ret[i][0] = Vector2(attribs[i * 4 + 0], attribs[i * 4 + 1]);
ret[i][1] = Vector2(attribs[i * 4 + 2], attribs[i * 4 + 3]);
}
return ret;
}
Vector<Basis> EditorSceneImporterGLTF::_decode_accessor_as_basis(GLTFState &state, int p_accessor, bool p_for_vertex) {
Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
Vector<Basis> ret;
if (attribs.size() == 0)
return ret;
ERR_FAIL_COND_V(attribs.size() % 9 != 0, ret);
ret.resize(attribs.size() / 9);
for (int i = 0; i < ret.size(); i++) {
ret[i].set_axis(0, Vector3(attribs[i * 9 + 0], attribs[i * 9 + 1], attribs[i * 9 + 2]));
ret[i].set_axis(1, Vector3(attribs[i * 9 + 3], attribs[i * 9 + 4], attribs[i * 9 + 5]));
ret[i].set_axis(2, Vector3(attribs[i * 9 + 6], attribs[i * 9 + 7], attribs[i * 9 + 8]));
}
return ret;
}
Vector<Transform> EditorSceneImporterGLTF::_decode_accessor_as_xform(GLTFState &state, int p_accessor, bool p_for_vertex) {
Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
Vector<Transform> ret;
if (attribs.size() == 0)
return ret;
ERR_FAIL_COND_V(attribs.size() % 16 != 0, ret);
ret.resize(attribs.size() / 16);
for (int i = 0; i < ret.size(); i++) {
ret[i].basis.set_axis(0, Vector3(attribs[i * 16 + 0], attribs[i * 16 + 1], attribs[i * 16 + 2]));
ret[i].basis.set_axis(1, Vector3(attribs[i * 16 + 4], attribs[i * 16 + 5], attribs[i * 16 + 6]));
ret[i].basis.set_axis(2, Vector3(attribs[i * 16 + 8], attribs[i * 16 + 9], attribs[i * 16 + 10]));
ret[i].set_origin(Vector3(attribs[i * 16 + 12], attribs[i * 16 + 13], attribs[i * 16 + 14]));
}
return ret;
}
Error EditorSceneImporterGLTF::_parse_meshes(GLTFState &state) {
if (!state.json.has("meshes"))
return OK;
Array meshes = state.json["meshes"];
for (int i = 0; i < meshes.size(); i++) {
print_line("on mesh: " + itos(i));
Dictionary d = meshes[i];
GLTFMesh mesh;
mesh.mesh.instance();
ERR_FAIL_COND_V(!d.has("primitives"), ERR_PARSE_ERROR);
Array primitives = d["primitives"];
for (int j = 0; j < primitives.size(); j++) {
Dictionary p = primitives[j];
Array array;
array.resize(Mesh::ARRAY_MAX);
ERR_FAIL_COND_V(!p.has("attributes"), ERR_PARSE_ERROR);
Dictionary a = p["attributes"];
Mesh::PrimitiveType primitive = Mesh::PRIMITIVE_TRIANGLES;
if (p.has("mode")) {
int mode = p["mode"];
ERR_FAIL_INDEX_V(mode, 7, ERR_FILE_CORRUPT);
static const Mesh::PrimitiveType primitives[7] = {
Mesh::PRIMITIVE_POINTS,
Mesh::PRIMITIVE_LINES,
Mesh::PRIMITIVE_LINE_LOOP,
Mesh::PRIMITIVE_LINE_STRIP,
Mesh::PRIMITIVE_TRIANGLES,
Mesh::PRIMITIVE_TRIANGLE_STRIP,
Mesh::PRIMITIVE_TRIANGLE_FAN,
};
primitive = primitives[mode];
}
if (a.has("POSITION")) {
array[Mesh::ARRAY_VERTEX] = _decode_accessor_as_vec3(state, a["POSITION"], true);
}
if (a.has("NORMAL")) {
array[Mesh::ARRAY_NORMAL] = _decode_accessor_as_vec3(state, a["NORMAL"], true);
}
if (a.has("TANGENT")) {
array[Mesh::ARRAY_TANGENT] = _decode_accessor_as_floats(state, a["TANGENT"], true);
}
if (a.has("TEXCOORD_0")) {
array[Mesh::ARRAY_TEX_UV] = _decode_accessor_as_vec2(state, a["TEXCOORD_0"], true);
}
if (a.has("TEXCOORD_1")) {
array[Mesh::ARRAY_TEX_UV2] = _decode_accessor_as_vec2(state, a["TEXCOORD_1"], true);
}
if (a.has("COLOR_0")) {
array[Mesh::ARRAY_COLOR] = _decode_accessor_as_color(state, a["COLOR_0"], true);
}
if (a.has("JOINTS_0")) {
array[Mesh::ARRAY_BONES] = _decode_accessor_as_ints(state, a["JOINTS_0"], true);
}
if (a.has("WEIGHTS_0")) {
PoolVector<float> weights = _decode_accessor_as_floats(state, a["WEIGHTS_0"], true);
{ //gltf does not seem to normalize the weights for some reason..
int wc = weights.size();
PoolVector<float>::Write w = weights.write();
//PoolVector<int> v = array[Mesh::ARRAY_BONES];
//PoolVector<int>::Read r = v.read();
for (int j = 0; j < wc; j += 4) {
float total = 0.0;
total += w[j + 0];
total += w[j + 1];
total += w[j + 2];
total += w[j + 3];
if (total > 0.0) {
w[j + 0] /= total;
w[j + 1] /= total;
w[j + 2] /= total;
w[j + 3] /= total;
}
//print_line(itos(j / 4) + ": " + itos(r[j + 0]) + ":" + rtos(w[j + 0]) + ", " + itos(r[j + 1]) + ":" + rtos(w[j + 1]) + ", " + itos(r[j + 2]) + ":" + rtos(w[j + 2]) + ", " + itos(r[j + 3]) + ":" + rtos(w[j + 3]));
}
}
array[Mesh::ARRAY_WEIGHTS] = weights;
}
if (p.has("indices")) {
PoolVector<int> indices = _decode_accessor_as_ints(state, p["indices"], false);
if (primitive == Mesh::PRIMITIVE_TRIANGLES) {
//swap around indices, convert ccw to cw for front face
int is = indices.size();
PoolVector<int>::Write w = indices.write();
for (int i = 0; i < is; i += 3) {
SWAP(w[i + 1], w[i + 2]);
}
}
array[Mesh::ARRAY_INDEX] = indices;
} else if (primitive == Mesh::PRIMITIVE_TRIANGLES) {
//generate indices because they need to be swapped for CW/CCW
PoolVector<Vector3> vertices = array[Mesh::ARRAY_VERTEX];
ERR_FAIL_COND_V(vertices.size() == 0, ERR_PARSE_ERROR);
PoolVector<int> indices;
int vs = vertices.size();
indices.resize(vs);
{
PoolVector<int>::Write w = indices.write();
for (int i = 0; i < vs; i += 3) {
w[i] = i;
w[i + 1] = i + 2;
w[i + 2] = i + 1;
}
}
array[Mesh::ARRAY_INDEX] = indices;
}
bool generated_tangents = false;
Variant erased_indices;
if (primitive == Mesh::PRIMITIVE_TRIANGLES && !a.has("TANGENT") && a.has("TEXCOORD_0") && a.has("NORMAL")) {
//must generate mikktspace tangents.. ergh..
Ref<SurfaceTool> st;
st.instance();
st->create_from_triangle_arrays(array);
if (p.has("targets")) {
//morph targets should not be reindexed, as array size might differ
//removing indices is the best bet here
st->deindex();
erased_indices = a[Mesh::ARRAY_INDEX];
a[Mesh::ARRAY_INDEX] = Variant();
}
st->generate_tangents();
array = st->commit_to_arrays();
generated_tangents = true;
}
Array morphs;
//blend shapes
if (p.has("targets")) {
print_line("has targets!");
Array targets = p["targets"];