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/**
* @file LLGLTFLoader.h
* @brief LLGLTFLoader class definition
*
* $LicenseInfo:firstyear=2022&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2022, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLGLTFLoader_H
#define LL_LLGLTFLoader_H
#include "tinygltf/tiny_gltf.h"
#include "asset.h"
#include "llglheaders.h"
#include "lljointdata.h"
#include "llmodelloader.h"
class LLGLTFLoader : public LLModelLoader
{
public:
typedef std::map<std::string, LLImportMaterial> material_map;
typedef std::map<std::string, std::string> joint_viewer_parent_map_t;
typedef std::map<std::string, glm::mat4> joint_viewer_rest_map_t;
typedef std::map<S32, glm::mat4> joint_node_mat4_map_t;
struct JointNodeData
{
JointNodeData()
: mJointListIdx(-1)
, mNodeIdx(-1)
, mParentNodeIdx(-1)
, mIsValidViewerJoint(false)
, mIsParentValidViewerJoint(false)
, mIsOverrideValid(false)
{
}
S32 mJointListIdx;
S32 mNodeIdx;
S32 mParentNodeIdx;
glm::mat4 mGltfRestMatrix;
glm::mat4 mViewerRestMatrix;
glm::mat4 mOverrideRestMatrix;
glm::mat4 mGltfMatrix;
glm::mat4 mOverrideMatrix;
std::string mName;
bool mIsValidViewerJoint;
bool mIsParentValidViewerJoint;
bool mIsOverrideValid;
};
typedef std::map <S32, JointNodeData> joints_data_map_t;
typedef std::map <std::string, S32> joints_name_to_node_map_t;
class LLGLTFImportMaterial : public LLImportMaterial
{
public:
std::string name;
LLGLTFImportMaterial() = default;
LLGLTFImportMaterial(const LLImportMaterial& mat, const std::string& n) : LLImportMaterial(mat), name(n) {}
};
LLGLTFLoader(std::string filename,
S32 lod,
LLModelLoader::load_callback_t load_cb,
LLModelLoader::joint_lookup_func_t joint_lookup_func,
LLModelLoader::texture_load_func_t texture_load_func,
LLModelLoader::state_callback_t state_cb,
void * opaque_userdata,
JointTransformMap & jointTransformMap,
JointNameSet & jointsFromNodes,
std::map<std::string, std::string, std::less<>> & jointAliasMap,
U32 maxJointsPerMesh,
U32 modelLimit,
U32 debugMode,
std::vector<LLJointData> viewer_skeleton); //,
//bool preprocess );
virtual ~LLGLTFLoader();
virtual bool OpenFile(const std::string &filename);
struct GLTFVertex
{
glm::vec3 position;
glm::vec3 normal;
glm::vec2 uv0;
glm::u16vec4 joints;
glm::vec4 weights;
};
protected:
LL::GLTF::Asset mGLTFAsset;
tinygltf::Model mGltfModel;
bool mGltfLoaded = false;
bool mApplyXYRotation = false;
// GLTF isn't aware of viewer's skeleton and uses it's own,
// so need to take viewer's joints and use them to
// recalculate iverse bind matrices
std::vector<LLJointData> mViewerJointData;
// vector of vectors because of a posibility of having more than one skin
typedef std::vector<LLMeshSkinInfo::matrix_list_t> bind_matrices_t;
typedef std::vector<std::vector<std::string> > joint_names_t;
bind_matrices_t mInverseBindMatrices;
bind_matrices_t mAlternateBindMatrices;
joint_names_t mJointNames; // empty string when no legal name for a given idx
std::vector<std::vector<S32>> mJointUsage; // detect and warn about unsed joints
// what group a joint belongs to.
// For purpose of stripping unused groups when joints are over limit.
struct JointGroups
{
std::string mGroup;
std::string mParentGroup;
};
typedef std::map<std::string, JointGroups, std::less<> > joint_to_group_map_t;
joint_to_group_map_t mJointGroups;
// per skin joint count, needs to be tracked for the sake of limits check.
std::vector<S32> mValidJointsCount;
// Cached material information
typedef std::map<S32, LLGLTFImportMaterial> MaterialCache;
MaterialCache mMaterialCache;
private:
bool parseMeshes();
void computeCombinedNodeTransform(const LL::GLTF::Asset& asset, S32 node_index, glm::mat4& combined_transform) const;
void processNodeHierarchy(S32 node_idx, std::map<std::string, S32>& mesh_name_counts, U32 submodel_limit, const LLVolumeParams& volume_params);
bool addJointToModelSkin(LLMeshSkinInfo& skin_info, S32 gltf_skin_idx, size_t gltf_joint_idx);
LLGLTFImportMaterial processMaterial(S32 material_index, S32 fallback_index);
std::string processTexture(S32 texture_index, const std::string& texture_type, const std::string& material_name);
bool validateTextureIndex(S32 texture_index, S32& source_index);
std::string generateMaterialName(S32 material_index, S32 fallback_index = -1);
bool populateModelFromMesh(LLModel* pModel, const std::string& base_name, const LL::GLTF::Mesh &mesh, const LL::GLTF::Node &node, material_map& mats);
void populateJointsFromSkin(S32 skin_idx);
void populateJointGroups();
void addModelToScene(LLModel* pModel, const std::string& model_name, U32 submodel_limit, const LLMatrix4& transformation, const LLVolumeParams& volume_params, const material_map& mats);
void buildJointGroup(LLJointData& viewer_data, const std::string& parent_group);
void buildOverrideMatrix(LLJointData& data, joints_data_map_t &gltf_nodes, joints_name_to_node_map_t &names_to_nodes, glm::mat4& parent_rest, glm::mat4& support_rest) const;
glm::mat4 buildGltfRestMatrix(S32 joint_node_index, const LL::GLTF::Skin& gltf_skin) const;
glm::mat4 buildGltfRestMatrix(S32 joint_node_index, const joints_data_map_t& joint_data) const;
glm::mat4 computeGltfToViewerSkeletonTransform(const joints_data_map_t& joints_data_map, S32 gltf_node_index, const std::string& joint_name) const;
bool checkForXYrotation(const LL::GLTF::Skin& gltf_skin, S32 joint_idx, S32 bind_indx);
void checkForXYrotation(const LL::GLTF::Skin& gltf_skin);
void checkGlobalJointUsage();
std::string extractTextureToTempFile(S32 textureIndex, const std::string& texture_type);
void notifyUnsupportedExtension(bool unsupported);
static size_t getSuffixPosition(const std::string& label);
static std::string getLodlessLabel(const LL::GLTF::Mesh& mesh);
// bool mPreprocessGLTF;
/* Below inherited from dae loader - unknown if/how useful here
void processElement(gltfElement *element, bool &badElement, GLTF *gltf);
void processGltfModel(LLModel *model, GLTF *gltf, gltfElement *pRoot, gltfMesh *mesh, gltfSkin *skin);
material_map getMaterials(LLModel *model, gltfInstance_geometry *instance_geo, GLTF *gltf);
LLImportMaterial profileToMaterial(gltfProfile_COMMON *material, GLTF *gltf);
LLColor4 getGltfColor(gltfElement *element);
gltfElement *getChildFromElement(gltfElement *pElement, std::string const &name);
bool isNodeAJoint(gltfNode *pNode);
void processJointNode(gltfNode *pNode, std::map<std::string, LLMatrix4> &jointTransforms);
void extractTranslation(gltfTranslate *pTranslate, LLMatrix4 &transform);
void extractTranslationViaElement(gltfElement *pTranslateElement, LLMatrix4 &transform);
void extractTranslationViaSID(gltfElement *pElement, LLMatrix4 &transform);
void buildJointToNodeMappingFromScene(gltfElement *pRoot);
void processJointToNodeMapping(gltfNode *pNode);
void processChildJoints(gltfNode *pParentNode);
bool verifyCount(int expected, int result);
// Verify that a controller matches vertex counts
bool verifyController(gltfController *pController);
static bool addVolumeFacesFromGltfMesh(LLModel *model, gltfMesh *mesh, LLSD &log_msg);
static bool createVolumeFacesFromGltfMesh(LLModel *model, gltfMesh *mesh);
static LLModel *loadModelFromGltfMesh(gltfMesh *mesh);
// Loads a mesh breaking it into one or more models as necessary
// to get around volume face limitations while retaining >8 materials
//
bool loadModelsFromGltfMesh(gltfMesh *mesh, std::vector<LLModel *> &models_out, U32 submodel_limit);
static std::string preprocessGLTF(std::string filename);
*/
};
#endif // LL_LLGLTFLLOADER_H
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