summaryrefslogtreecommitdiffstats
path: root/src/datavisualization/engine/surface3drenderer_p.h
blob: 76b1c80aa39fe7e4ae2b08bf14811a84cfcd0d9f (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
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.io
**
** This file is part of the Qt Data Visualization module.
**
** Licensees holding valid commercial license for Qt may use this file in
** accordance with the Qt License Agreement provided with the Software
** or, alternatively, in accordance with the terms contained in a written
** agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.io
**
****************************************************************************/

//
//  W A R N I N G
//  -------------
//
// This file is not part of the QtDataVisualization API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.

#ifndef SURFACE3DRENDERER_P_H
#define SURFACE3DRENDERER_P_H

#include "datavisualizationglobal_p.h"
#include "surface3dcontroller_p.h"
#include "abstract3drenderer_p.h"
#include "surfaceseriesrendercache_p.h"

QT_BEGIN_NAMESPACE_DATAVISUALIZATION

class ShaderHelper;
class Q3DScene;

class QT_DATAVISUALIZATION_EXPORT Surface3DRenderer : public Abstract3DRenderer
{
    Q_OBJECT

private:
    bool m_cachedIsSlicingActivated;

    // Internal attributes purely related to how the scene is drawn with GL.
    ShaderHelper *m_depthShader;
    ShaderHelper *m_backgroundShader;
    ShaderHelper *m_surfaceFlatShader;
    ShaderHelper *m_surfaceSmoothShader;
    ShaderHelper *m_surfaceTexturedSmoothShader;
    ShaderHelper *m_surfaceTexturedFlatShader;
    ShaderHelper *m_surfaceGridShader;
    ShaderHelper *m_surfaceSliceFlatShader;
    ShaderHelper *m_surfaceSliceSmoothShader;
    ShaderHelper *m_selectionShader;
    float m_heightNormalizer;
    float m_scaleX;
    float m_scaleY;
    float m_scaleZ;
    GLuint m_depthFrameBuffer;
    GLuint m_selectionFrameBuffer;
    GLuint m_selectionDepthBuffer;
    GLuint m_selectionResultTexture;
    GLfloat m_shadowQualityToShader;
    bool m_flatSupported;
    bool m_selectionActive;
    AbstractRenderItem m_dummyRenderItem;
    GLint m_shadowQualityMultiplier;
    QPoint m_selectedPoint;
    QSurface3DSeries *m_selectedSeries;
    QPoint m_clickedPosition;
    bool m_selectionTexturesDirty;
    GLuint m_noShadowTexture;
    bool m_flipHorizontalGrid;

public:
    explicit Surface3DRenderer(Surface3DController *controller);
    ~Surface3DRenderer();

    void updateData();
    void updateSeries(const QList<QAbstract3DSeries *> &seriesList);
    void updateSurfaceTextures(QVector<QSurface3DSeries *> seriesList);
    SeriesRenderCache *createNewCache(QAbstract3DSeries *series);
    void cleanCache(SeriesRenderCache *cache);
    void updateSelectionMode(QAbstract3DGraph::SelectionFlags mode);
    void updateRows(const QVector<Surface3DController::ChangeRow> &rows);
    void updateItems(const QVector<Surface3DController::ChangeItem> &points);
    void updateScene(Q3DScene *scene);
    void updateSlicingActive(bool isSlicing);
    void updateSelectedPoint(const QPoint &position, QSurface3DSeries *series);
    void updateFlipHorizontalGrid(bool flip);
    inline QPoint clickedPosition() const { return m_clickedPosition; }
    void resetClickedStatus();
    QVector3D convertPositionToTranslation(const QVector3D &position, bool isAbsolute);
    void updateAxisLabels(QAbstract3DAxis::AxisOrientation orientation,
                          const QStringList &labels);
    void updateAxisTitleVisibility(QAbstract3DAxis::AxisOrientation orientation,
                                   bool visible);
    void updateMargin(float margin);

    void render(GLuint defaultFboHandle = 0);

protected:
    void initializeOpenGL();
    virtual void fixCameraTarget(QVector3D &target);
    virtual void getVisibleItemBounds(QVector3D &minBounds, QVector3D &maxBounds);

signals:
    void flatShadingSupportedChanged(bool supported);

private:
    void checkFlatSupport(SurfaceSeriesRenderCache *cache);
    void updateObjects(SurfaceSeriesRenderCache *cache, bool dimensionChanged);
    void updateSliceDataModel(const QPoint &point);
    QPoint mapCoordsToSampleSpace(SurfaceSeriesRenderCache *cache, const QPointF &coords);
    void findMatchingRow(float z, int &sample, int direction, QSurfaceDataArray &dataArray);
    void findMatchingColumn(float x, int &sample, int direction, QSurfaceDataArray &dataArray);
    void updateSliceObject(SurfaceSeriesRenderCache *cache, const QPoint &point);
    void updateShadowQuality(QAbstract3DGraph::ShadowQuality quality);
    void updateTextures();
    void initShaders(const QString &vertexShader, const QString &fragmentShader);
    QRect calculateSampleRect(const QSurfaceDataArray &array);
    void loadBackgroundMesh();

    void drawSlicedScene();
    void drawScene(GLuint defaultFboHandle);
    void drawLabels(bool drawSelection, const Q3DCamera *activeCamera,
                    const QMatrix4x4 &viewMatrix, const QMatrix4x4 &projectionMatrix);

    void calculateSceneScalingFactors();
    void initBackgroundShaders(const QString &vertexShader, const QString &fragmentShader);
    void initSelectionShaders();
    void initSurfaceShaders();
    void initSelectionBuffer();
    void initDepthShader();
    void updateSelectionTextures();
    void createSelectionTexture(SurfaceSeriesRenderCache *cache, uint &lastSelectionId);
    void idToRGBA(uint id, uchar *r, uchar *g, uchar *b, uchar *a);
    void fillIdCorner(uchar *p, uchar r, uchar g, uchar b, uchar a);
    void surfacePointSelected(const QPoint &point);
    void updateSelectionPoint(SurfaceSeriesRenderCache *cache, const QPoint &point, bool label);
    QPoint selectionIdToSurfacePoint(uint id);
    void updateDepthBuffer();
    void emitSelectedPointChanged(QPoint position);

    Q_DISABLE_COPY(Surface3DRenderer)

    friend class SurfaceObject;
};

QT_END_NAMESPACE_DATAVISUALIZATION

#endif