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// Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QT3DRENDER_RENDER_GLTFSKELETONLOADER_P_H
#define QT3DRENDER_RENDER_GLTFSKELETONLOADER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtGlobal>
#include <Qt3DCore/qattribute.h>
#include <QtGui/qmatrix4x4.h>
#include <QtCore/qjsondocument.h>
#include <Qt3DRender/private/skeletondata_p.h>
#include <Qt3DCore/private/sqt_p.h>
QT_BEGIN_NAMESPACE
class QJsonObject;
namespace Qt3DRender {
namespace Render {
class GLTFSkeletonLoader
{
class BufferData
{
public:
BufferData();
explicit BufferData(const QJsonObject &json);
quint64 byteLength;
QString path;
QByteArray data;
};
class BufferView
{
public:
BufferView();
explicit BufferView(const QJsonObject &json);
int bufferIndex;
quint64 byteOffset;
quint64 byteLength;
int target; // Only for per vertex attributes
};
class AccessorData
{
public:
AccessorData();
explicit AccessorData(const QJsonObject &json);
int bufferViewIndex;
Qt3DCore::QAttribute::VertexBaseType type;
uint dataSize;
int count;
int byteOffset;
int byteStride; // Only for per vertex attributes
// TODO: Extend to support sparse accessors
};
class Skin
{
public:
Skin();
explicit Skin(const QJsonObject &json);
QString name;
int inverseBindAccessorIndex;
std::vector<int> jointNodeIndices;
};
class Node
{
public:
Node();
explicit Node(const QJsonObject &json);
Qt3DCore::Sqt localTransform;
std::vector<int> childNodeIndices;
QString name;
int parentNodeIndex;
int cameraIndex;
int meshIndex;
int skinIndex;
};
public:
GLTFSkeletonLoader();
bool load(QIODevice *ioDev);
SkeletonData createSkeleton(const QString &skeletonName);
private:
static Qt3DCore::QAttribute::VertexBaseType accessorTypeFromJSON(int componentType);
static uint accessorTypeSize(Qt3DCore::QAttribute::VertexBaseType componentType);
static uint accessorDataSizeFromJson(const QString &type);
struct RawData
{
const char *data;
quint64 byteLength;
};
void setBasePath(const QString &path);
bool setJSON(const QJsonDocument &json);
bool parse();
bool parseGLTF2();
void cleanup();
bool processJSONBuffer(const QJsonObject &json);
bool processJSONBufferView(const QJsonObject &json);
bool processJSONAccessor(const QJsonObject &json);
bool processJSONSkin(const QJsonObject &json);
bool processJSONNode(const QJsonObject &json);
void setupNodeParentLinks();
QByteArray resolveLocalData(const QString &path) const;
SkeletonData createSkeletonFromSkin(const Skin &skin) const;
QMatrix4x4 inverseBindMatrix(const Skin &skin, int jointIndex) const;
RawData accessorData(int accessorIndex, int index) const;
QJsonDocument m_json;
QString m_basePath;
std::vector<BufferData> m_bufferDatas;
std::vector<BufferView> m_bufferViews;
std::vector<AccessorData> m_accessors;
std::vector<Skin> m_skins;
std::vector<Node> m_nodes;
};
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
#endif // QT3DRENDER_RENDER_GLTFSKELETONLOADER_P_H
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