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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Data Visualization module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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
class ShaderHelper;
class Q3DScene;
class Q_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() override;
void updateSeries(const QList<QAbstract3DSeries *> &seriesList) override;
void updateSurfaceTextures(QList<QSurface3DSeries *> seriesList);
SeriesRenderCache *createNewCache(QAbstract3DSeries *series) override;
void cleanCache(SeriesRenderCache *cache) override;
void updateSelectionMode(QAbstract3DGraph::SelectionFlags mode) override;
void updateRows(const QList<Surface3DController::ChangeRow> &rows);
void updateItems(const QList<Surface3DController::ChangeItem> &points);
void updateScene(Q3DScene *scene) override;
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) override;
void updateAxisLabels(QAbstract3DAxis::AxisOrientation orientation,
const QStringList &labels) override;
void updateAxisTitleVisibility(QAbstract3DAxis::AxisOrientation orientation,
bool visible) override;
void updateMargin(float margin) override;
void render(GLuint defaultFboHandle = 0) override;
protected:
void contextCleanup() override;
void initializeOpenGL() override;
virtual void fixCameraTarget(QVector3D &target) override;
virtual void getVisibleItemBounds(QVector3D &minBounds, QVector3D &maxBounds) override;
Q_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) override;
void updateTextures() override;
void initShaders(const QString &vertexShader, const QString &fragmentShader) override;
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) override;
void initSelectionShaders();
void initSurfaceShaders();
void initSelectionBuffer() override;
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() override;
void emitSelectedPointChanged(QPoint position);
Q_DISABLE_COPY(Surface3DRenderer)
friend class SurfaceObject;
};
QT_END_NAMESPACE
#endif
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