summaryrefslogtreecommitdiffstats
path: root/src/animation/backend/gltfimporter_p.h
blob: e31f8d07802d7a6771ed7f2019c865d170f92f34 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
/****************************************************************************
**
** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QT3DANIMATION_ANIMATION_GLTFIMPORTER_H
#define QT3DANIMATION_ANIMATION_GLTFIMPORTER_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 <Qt3DAnimation/private/fcurve_p.h>
#include <Qt3DRender/qattribute.h>
#include <Qt3DCore/private/sqt_p.h>
#include <Qt3DCore/private/qmath3d_p.h>

#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>
#include <QJsonValue>
#include <QVector>

QT_BEGIN_NAMESPACE

class QIODevice;

namespace Qt3DAnimation {
namespace Animation {

class GLTFImporter
{
public:
    class BufferData
    {
    public:
        BufferData();
        explicit BufferData(const QJsonObject &json);

        quint64 byteLength;
        QString path;
        QByteArray data;
    };

    class BufferView
    {
    public:
        BufferView();
        explicit BufferView(const QJsonObject &json);

        quint64 byteOffset;
        quint64 byteLength;
        int bufferIndex;
        int target; // Only for per vertex attributes
    };

    class AccessorData
    {
    public:
        AccessorData();
        explicit AccessorData(const QJsonObject &json);

        int bufferViewIndex;
        Qt3DRender::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;
        QVector<int> jointNodeIndices;
    };

    class Channel
    {
    public:
        Channel();
        explicit Channel(const QJsonObject &json);

        int samplerIndex;
        int targetNodeIndex;
        QString targetProperty;
    };

    class Sampler
    {
    public:
        Sampler();
        explicit Sampler(const QJsonObject &json);

        enum InterpolationMode {
            Linear,
            Step,
            CatmullRomSpline,
            CubicSpline
        };

        QString interpolationModeString() const;

        int inputAccessorIndex;
        int outputAccessorIndex;
        InterpolationMode interpolationMode;
    };

    class Animation
    {
    public:
        Animation();
        explicit Animation(const QJsonObject &json);

        QString name;
        QVector<Channel> channels;
        QVector<Sampler> samplers;
    };

    class Node
    {
    public:
        Node();
        explicit Node(const QJsonObject &json);

        Qt3DCore::Sqt localTransform;
        QVector<int> childNodeIndices;
        QString name;
        int parentNodeIndex;
        int cameraIndex;
        int meshIndex;
        int skinIndex;
    };

    GLTFImporter();

    bool load(QIODevice *ioDev);
    const QVector<Animation> animations() const { return m_animations; }

    struct AnimationNameAndChannels
    {
        QString name;
        QVector<Qt3DAnimation::Animation::Channel> channels;
    };
    AnimationNameAndChannels createAnimationData(int animationIndex, const QString &animationName = QString()) const;

private:
    static Qt3DRender::QAttribute::VertexBaseType accessorTypeFromJSON(int componentType);
    static uint accessorTypeSize(Qt3DRender::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();
    QHash<int, int> createNodeIndexToJointIndexMap(const Skin &skin) const;

    bool processJSONBuffer(const QJsonObject &json);
    bool processJSONBufferView(const QJsonObject &json);
    bool processJSONAccessor(const QJsonObject &json);
    bool processJSONSkin(const QJsonObject &json);
    bool processJSONAnimation(const QJsonObject &json);
    bool processJSONNode(const QJsonObject &json);
    void setupNodeParentLinks();
    QByteArray resolveLocalData(const QString &path) const;

    RawData accessorData(int accessorIndex, int index) const;

    QJsonDocument m_json;
    QString m_basePath;
    QVector<BufferData> m_bufferDatas;
    QVector<BufferView> m_bufferViews;
    QVector<AccessorData> m_accessors;
    QVector<Skin> m_skins;
    QVector<Animation> m_animations;
    QVector<Node> m_nodes;
};

} // namespace Animation
} // namespace Qt3DAnimation

QT_END_NAMESPACE

#endif // QT3DANIMATION_ANIMATION_GLTFIMPORTER_H