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godot/modules/gltf/gltf_document.h

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/**************************************************************************/
/* gltf_document.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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. */
/**************************************************************************/
#ifndef GLTF_DOCUMENT_H
#define GLTF_DOCUMENT_H
#include "extensions/gltf_document_extension.h"
#include "extensions/gltf_spec_gloss.h"
#include "gltf_defines.h"
#include "gltf_state.h"
#include "scene/3d/mesh_instance_3d.h"
#include "scene/3d/multimesh_instance_3d.h"
#include "modules/modules_enabled.gen.h" // For csg, gridmap.
#ifdef MODULE_CSG_ENABLED
#include "modules/csg/csg_shape.h"
#endif // MODULE_CSG_ENABLED
#ifdef MODULE_GRIDMAP_ENABLED
#include "modules/gridmap/grid_map.h"
#endif // MODULE_GRIDMAP_ENABLED
class GLTFDocument : public Resource {
GDCLASS(GLTFDocument, Resource);
public:
const int32_t JOINT_GROUP_SIZE = 4;
enum {
ARRAY_BUFFER = 34962,
ELEMENT_ARRAY_BUFFER = 34963,
COMPONENT_TYPE_BYTE = 5120,
COMPONENT_TYPE_UNSIGNED_BYTE = 5121,
COMPONENT_TYPE_SHORT = 5122,
COMPONENT_TYPE_UNSIGNED_SHORT = 5123,
COMPONENT_TYPE_INT = 5125,
COMPONENT_TYPE_FLOAT = 5126,
};
enum {
TEXTURE_TYPE_GENERIC = 0,
TEXTURE_TYPE_NORMAL = 1,
};
enum RootNodeMode {
ROOT_NODE_MODE_SINGLE_ROOT,
ROOT_NODE_MODE_KEEP_ROOT,
ROOT_NODE_MODE_MULTI_ROOT,
};
private:
const float BAKE_FPS = 30.0f;
int _naming_version = 1;
String _image_format = "PNG";
float _lossy_quality = 0.75f;
Ref<GLTFDocumentExtension> _image_save_extension;
RootNodeMode _root_node_mode = RootNodeMode::ROOT_NODE_MODE_SINGLE_ROOT;
protected:
static void _bind_methods();
String _gen_unique_name(Ref<GLTFState> p_state, const String &p_name);
static Vector<Ref<GLTFDocumentExtension>> all_document_extensions;
Vector<Ref<GLTFDocumentExtension>> document_extensions;
public:
static void register_gltf_document_extension(Ref<GLTFDocumentExtension> p_extension, bool p_first_priority = false);
static void unregister_gltf_document_extension(Ref<GLTFDocumentExtension> p_extension);
static void unregister_all_gltf_document_extensions();
static Vector<Ref<GLTFDocumentExtension>> get_all_gltf_document_extensions();
void set_naming_version(int p_version);
int get_naming_version() const;
void set_image_format(const String &p_image_format);
String get_image_format() const;
void set_lossy_quality(float p_lossy_quality);
float get_lossy_quality() const;
void set_root_node_mode(RootNodeMode p_root_node_mode);
RootNodeMode get_root_node_mode() const;
static String _gen_unique_name_static(HashSet<String> &r_unique_names, const String &p_name);
private:
void _build_parent_hierachy(Ref<GLTFState> p_state);
double _filter_number(double p_float);
void _round_min_max_components(Vector<double> &r_type_min, Vector<double> &r_type_max);
String _get_component_type_name(const uint32_t p_component);
int _get_component_type_size(const int p_component_type);
Error _parse_scenes(Ref<GLTFState> p_state);
Error _parse_nodes(Ref<GLTFState> p_state);
String _get_type_name(const GLTFType p_component);
String _get_accessor_type_name(const GLTFType p_type);
String _sanitize_animation_name(const String &p_name);
String _gen_unique_animation_name(Ref<GLTFState> p_state, const String &p_name);
String _sanitize_bone_name(const String &p_name);
String _gen_unique_bone_name(Ref<GLTFState> p_state,
const GLTFSkeletonIndex p_skel_i,
const String &p_name);
GLTFTextureIndex _set_texture(Ref<GLTFState> p_state, Ref<Texture2D> p_texture,
StandardMaterial3D::TextureFilter p_filter_mode, bool p_repeats);
Ref<Texture2D> _get_texture(Ref<GLTFState> p_state,
const GLTFTextureIndex p_texture, int p_texture_type);
GLTFTextureSamplerIndex _set_sampler_for_mode(Ref<GLTFState> p_state,
StandardMaterial3D::TextureFilter p_filter_mode, bool p_repeats);
Ref<GLTFTextureSampler> _get_sampler_for_texture(Ref<GLTFState> p_state,
const GLTFTextureIndex p_texture);
Error _parse_json(const String &p_path, Ref<GLTFState> p_state);
Error _parse_glb(Ref<FileAccess> p_file, Ref<GLTFState> p_state);
void _compute_node_heights(Ref<GLTFState> p_state);
Error _parse_buffers(Ref<GLTFState> p_state, const String &p_base_path);
Error _parse_buffer_views(Ref<GLTFState> p_state);
GLTFType _get_type_from_str(const String &p_string);
Error _parse_accessors(Ref<GLTFState> p_state);
Error _decode_buffer_view(Ref<GLTFState> p_state, double *p_dst,
const GLTFBufferViewIndex p_buffer_view,
const int p_skip_every, const int p_skip_bytes,
const int p_element_size, const int p_count,
const GLTFType p_type, const int p_component_count,
const int p_component_type, const int p_component_size,
const bool p_normalized, const int p_byte_offset,
const bool p_for_vertex);
Vector<double> _decode_accessor(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex);
Vector<float> _decode_accessor_as_floats(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex,
const Vector<int> &p_packed_vertex_ids = Vector<int>());
Vector<int> _decode_accessor_as_ints(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex,
const Vector<int> &p_packed_vertex_ids = Vector<int>());
Vector<Vector2> _decode_accessor_as_vec2(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex,
const Vector<int> &p_packed_vertex_ids = Vector<int>());
Vector<Vector3> _decode_accessor_as_vec3(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex,
const Vector<int> &p_packed_vertex_ids = Vector<int>());
Vector<Color> _decode_accessor_as_color(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex,
const Vector<int> &p_packed_vertex_ids = Vector<int>());
Vector<Quaternion> _decode_accessor_as_quaternion(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex);
Vector<Transform2D> _decode_accessor_as_xform2d(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex);
Vector<Basis> _decode_accessor_as_basis(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex);
Vector<Transform3D> _decode_accessor_as_xform(Ref<GLTFState> p_state,
const GLTFAccessorIndex p_accessor,
const bool p_for_vertex);
Error _parse_meshes(Ref<GLTFState> p_state);
Error _serialize_textures(Ref<GLTFState> p_state);
Error _serialize_texture_samplers(Ref<GLTFState> p_state);
Error _serialize_images(Ref<GLTFState> p_state);
Error _serialize_lights(Ref<GLTFState> p_state);
Ref<Image> _parse_image_bytes_into_image(Ref<GLTFState> p_state, const Vector<uint8_t> &p_bytes, const String &p_mime_type, int p_index, String &r_file_extension);
void _parse_image_save_image(Ref<GLTFState> p_state, const Vector<uint8_t> &p_bytes, const String &p_file_extension, int p_index, Ref<Image> p_image);
Error _parse_images(Ref<GLTFState> p_state, const String &p_base_path);
Error _parse_textures(Ref<GLTFState> p_state);
Error _parse_texture_samplers(Ref<GLTFState> p_state);
Error _parse_materials(Ref<GLTFState> p_state);
void _set_texture_transform_uv1(const Dictionary &d, Ref<BaseMaterial3D> p_material);
void spec_gloss_to_rough_metal(Ref<GLTFSpecGloss> r_spec_gloss,
Ref<BaseMaterial3D> p_material);
static void spec_gloss_to_metal_base_color(const Color &p_specular_factor,
const Color &p_diffuse,
Color &r_base_color,
float &r_metallic);
Error _parse_skins(Ref<GLTFState> p_state);
Error _serialize_skins(Ref<GLTFState> p_state);
Error _create_skins(Ref<GLTFState> p_state);
bool _skins_are_same(const Ref<Skin> p_skin_a, const Ref<Skin> p_skin_b);
void _remove_duplicate_skins(Ref<GLTFState> p_state);
Error _serialize_cameras(Ref<GLTFState> p_state);
Error _parse_cameras(Ref<GLTFState> p_state);
Error _parse_lights(Ref<GLTFState> p_state);
Error _parse_animations(Ref<GLTFState> p_state);
Error _serialize_animations(Ref<GLTFState> p_state);
BoneAttachment3D *_generate_bone_attachment(Ref<GLTFState> p_state,
Skeleton3D *p_skeleton,
const GLTFNodeIndex p_node_index,
const GLTFNodeIndex p_bone_index);
ImporterMeshInstance3D *_generate_mesh_instance(Ref<GLTFState> p_state, const GLTFNodeIndex p_node_index);
Camera3D *_generate_camera(Ref<GLTFState> p_state, const GLTFNodeIndex p_node_index);
Light3D *_generate_light(Ref<GLTFState> p_state, const GLTFNodeIndex p_node_index);
Node3D *_generate_spatial(Ref<GLTFState> p_state, const GLTFNodeIndex p_node_index);
void _assign_node_names(Ref<GLTFState> p_state);
template <typename T>
T _interpolate_track(const Vector<real_t> &p_times, const Vector<T> &p_values,
const float p_time,
const GLTFAnimation::Interpolation p_interp);
GLTFAccessorIndex _encode_accessor_as_quaternions(Ref<GLTFState> p_state,
const Vector<Quaternion> p_attribs,
const bool p_for_vertex);
GLTFAccessorIndex _encode_accessor_as_weights(Ref<GLTFState> p_state,
const Vector<Color> p_attribs,
const bool p_for_vertex);
GLTFAccessorIndex _encode_accessor_as_joints(Ref<GLTFState> p_state,
const Vector<Color> p_attribs,
const bool p_for_vertex);
GLTFAccessorIndex _encode_accessor_as_floats(Ref<GLTFState> p_state,
const Vector<real_t> p_attribs,
const bool p_for_vertex);
GLTFAccessorIndex _encode_accessor_as_vec2(Ref<GLTFState> p_state,
const Vector<Vector2> p_attribs,
const bool p_for_vertex);
void _calc_accessor_vec2_min_max(int p_i, const int p_element_count, Vector<double> &p_type_max, Vector2 p_attribs, Vector<double> &p_type_min) {
if (p_i == 0) {
for (int32_t type_i = 0; type_i < p_element_count; type_i++) {
p_type_max.write[type_i] = p_attribs[(p_i * p_element_count) + type_i];
p_type_min.write[type_i] = p_attribs[(p_i * p_element_count) + type_i];
}
}
for (int32_t type_i = 0; type_i < p_element_count; type_i++) {
p_type_max.write[type_i] = MAX(p_attribs[(p_i * p_element_count) + type_i], p_type_max[type_i]);
p_type_min.write[type_i] = MIN(p_attribs[(p_i * p_element_count) + type_i], p_type_min[type_i]);
p_type_max.write[type_i] = _filter_number(p_type_max.write[type_i]);
p_type_min.write[type_i] = _filter_number(p_type_min.write[type_i]);
}
}
GLTFAccessorIndex _encode_accessor_as_vec3(Ref<GLTFState> p_state,
const Vector<Vector3> p_attribs,
const bool p_for_vertex);
GLTFAccessorIndex _encode_sparse_accessor_as_vec3(Ref<GLTFState> p_state, const Vector<Vector3> p_attribs, const Vector<Vector3> p_reference_attribs, const float p_reference_multiplier, const bool p_for_vertex, const GLTFAccessorIndex p_reference_accessor);
GLTFAccessorIndex _encode_accessor_as_color(Ref<GLTFState> p_state,
const Vector<Color> p_attribs,
const bool p_for_vertex);
void _calc_accessor_min_max(int p_i, const int p_element_count, Vector<double> &p_type_max, Vector<double> p_attribs, Vector<double> &p_type_min);
GLTFAccessorIndex _encode_accessor_as_ints(Ref<GLTFState> p_state,
const Vector<int32_t> p_attribs,
const bool p_for_vertex,
const bool p_for_indices);
GLTFAccessorIndex _encode_accessor_as_xform(Ref<GLTFState> p_state,
const Vector<Transform3D> p_attribs,
const bool p_for_vertex);
Error _encode_buffer_view(Ref<GLTFState> p_state, const double *p_src,
const int p_count, const GLTFType p_type,
const int p_component_type, const bool p_normalized,
const int p_byte_offset, const bool p_for_vertex,
GLTFBufferViewIndex &r_accessor, const bool p_for_indices = false);
Error _encode_accessors(Ref<GLTFState> p_state);
Error _encode_buffer_views(Ref<GLTFState> p_state);
Error _serialize_materials(Ref<GLTFState> p_state);
Error _serialize_meshes(Ref<GLTFState> p_state);
Error _serialize_nodes(Ref<GLTFState> p_state);
Error _serialize_scenes(Ref<GLTFState> p_state);
String interpolation_to_string(const GLTFAnimation::Interpolation p_interp);
GLTFAnimation::Track _convert_animation_track(Ref<GLTFState> p_state,
GLTFAnimation::Track p_track,
Ref<Animation> p_animation,
int32_t p_track_i,
GLTFNodeIndex p_node_i);
Error _encode_buffer_bins(Ref<GLTFState> p_state, const String &p_path);
Error _encode_buffer_glb(Ref<GLTFState> p_state, const String &p_path);
PackedByteArray _serialize_glb_buffer(Ref<GLTFState> p_state, Error *r_err);
Dictionary _serialize_texture_transform_uv1(Ref<BaseMaterial3D> p_material);
Dictionary _serialize_texture_transform_uv2(Ref<BaseMaterial3D> p_material);
Error _serialize_asset_header(Ref<GLTFState> p_state);
Error _serialize_file(Ref<GLTFState> p_state, const String p_path);
Error _serialize_gltf_extensions(Ref<GLTFState> p_state) const;
public:
// https://www.itu.int/rec/R-REC-BT.601
// https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.601-7-201103-I!!PDF-E.pdf
static constexpr float R_BRIGHTNESS_COEFF = 0.299f;
static constexpr float G_BRIGHTNESS_COEFF = 0.587f;
static constexpr float B_BRIGHTNESS_COEFF = 0.114f;
private:
// https://github.com/microsoft/glTF-SDK/blob/master/GLTFSDK/Source/PBRUtils.cpp#L9
// https://bghgary.github.io/glTF/convert-between-workflows-bjs/js/babylon.pbrUtilities.js
static float solve_metallic(float p_dielectric_specular, float p_diffuse,
float p_specular,
float p_one_minus_specular_strength);
static float get_perceived_brightness(const Color p_color);
static float get_max_component(const Color &p_color);
public:
virtual Error append_from_file(String p_path, Ref<GLTFState> p_state, uint32_t p_flags = 0, String p_base_path = String());
virtual Error append_from_buffer(PackedByteArray p_bytes, String p_base_path, Ref<GLTFState> p_state, uint32_t p_flags = 0);
virtual Error append_from_scene(Node *p_node, Ref<GLTFState> p_state, uint32_t p_flags = 0);
virtual Node *generate_scene(Ref<GLTFState> p_state, float p_bake_fps = 30.0f, bool p_trimming = false, bool p_remove_immutable_tracks = true);
virtual PackedByteArray generate_buffer(Ref<GLTFState> p_state);
virtual Error write_to_filesystem(Ref<GLTFState> p_state, const String &p_path);
public:
Error _parse_gltf_state(Ref<GLTFState> p_state, const String &p_search_path);
Error _parse_asset_header(Ref<GLTFState> p_state);
Error _parse_gltf_extensions(Ref<GLTFState> p_state);
void _process_mesh_instances(Ref<GLTFState> p_state, Node *p_scene_root);
Node *_generate_scene_node_tree(Ref<GLTFState> p_state);
void _generate_scene_node(Ref<GLTFState> p_state, const GLTFNodeIndex p_node_index, Node *p_scene_parent, Node *p_scene_root);
void _generate_skeleton_bone_node(Ref<GLTFState> p_state, const GLTFNodeIndex p_node_index, Node *p_scene_parent, Node *p_scene_root);
void _import_animation(Ref<GLTFState> p_state, AnimationPlayer *p_animation_player,
const GLTFAnimationIndex p_index, const float p_bake_fps, const bool p_trimming, const bool p_remove_immutable_tracks);
void _convert_mesh_instances(Ref<GLTFState> p_state);
GLTFCameraIndex _convert_camera(Ref<GLTFState> p_state, Camera3D *p_camera);
void _convert_light_to_gltf(Light3D *p_light, Ref<GLTFState> p_state, Ref<GLTFNode> p_gltf_node);
GLTFLightIndex _convert_light(Ref<GLTFState> p_state, Light3D *p_light);
void _convert_spatial(Ref<GLTFState> p_state, Node3D *p_spatial, Ref<GLTFNode> p_node);
void _convert_scene_node(Ref<GLTFState> p_state, Node *p_current,
const GLTFNodeIndex p_gltf_current,
const GLTFNodeIndex p_gltf_root);
#ifdef MODULE_CSG_ENABLED
void _convert_csg_shape_to_gltf(CSGShape3D *p_current, GLTFNodeIndex p_gltf_parent, Ref<GLTFNode> p_gltf_node, Ref<GLTFState> p_state);
#endif // MODULE_CSG_ENABLED
void _create_gltf_node(Ref<GLTFState> p_state,
Node *p_scene_parent,
GLTFNodeIndex p_current_node_i,
GLTFNodeIndex p_parent_node_index,
GLTFNodeIndex p_root_gltf_node,
Ref<GLTFNode> p_gltf_node);
void _convert_animation_player_to_gltf(
AnimationPlayer *p_animation_player, Ref<GLTFState> p_state,
GLTFNodeIndex p_gltf_current,
GLTFNodeIndex p_gltf_root_index,
Ref<GLTFNode> p_gltf_node, Node *p_scene_parent);
void _check_visibility(Node *p_node, bool &r_retflag);
void _convert_camera_to_gltf(Camera3D *p_camera, Ref<GLTFState> p_state,
Ref<GLTFNode> p_gltf_node);
#ifdef MODULE_GRIDMAP_ENABLED
void _convert_grid_map_to_gltf(
GridMap *p_grid_map,
GLTFNodeIndex p_parent_node_index,
GLTFNodeIndex p_root_node_index,
Ref<GLTFNode> p_gltf_node, Ref<GLTFState> p_state);
#endif // MODULE_GRIDMAP_ENABLED
void _convert_multi_mesh_instance_to_gltf(
MultiMeshInstance3D *p_multi_mesh_instance,
GLTFNodeIndex p_parent_node_index,
GLTFNodeIndex p_root_node_index,
Ref<GLTFNode> p_gltf_node, Ref<GLTFState> p_state);
void _convert_skeleton_to_gltf(
Skeleton3D *p_scene_parent, Ref<GLTFState> p_state,
GLTFNodeIndex p_parent_node_index,
GLTFNodeIndex p_root_node_index,
Ref<GLTFNode> p_gltf_node);
void _convert_bone_attachment_to_gltf(BoneAttachment3D *p_bone_attachment,
Ref<GLTFState> p_state,
GLTFNodeIndex p_parent_node_index,
GLTFNodeIndex p_root_node_index,
Ref<GLTFNode> p_gltf_node);
void _convert_mesh_instance_to_gltf(MeshInstance3D *p_mesh_instance,
Ref<GLTFState> p_state,
Ref<GLTFNode> p_gltf_node);
GLTFMeshIndex _convert_mesh_to_gltf(Ref<GLTFState> p_state,
MeshInstance3D *p_mesh_instance);
void _convert_animation(Ref<GLTFState> p_state, AnimationPlayer *p_animation_player, String p_animation_track_name);
Error _serialize(Ref<GLTFState> p_state);
Error _parse(Ref<GLTFState> p_state, String p_path, Ref<FileAccess> p_file);
};
VARIANT_ENUM_CAST(GLTFDocument::RootNodeMode);
#endif // GLTF_DOCUMENT_H
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