qgsskyboxentity.h

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/***************************************************************************
  qgsskyboxentity.h
  --------------------------------------
  Date                 : August 2020
  Copyright            : (C) 2020 by Belgacem Nedjima
  Email                : gb uderscore nedjima at esi dot dz
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSSKYBOXENTITY_H
#define QGSSKYBOXENTITY_H
 
#include "qgis_3d.h"
 
#include <QVector3D>
#include <Qt3DCore/QEntity>
#include <Qt3DExtras/QCuboidMesh>
#include <Qt3DExtras/QPlaneMesh>
#include <Qt3DRender/QEffect>
#include <Qt3DRender/QFilterKey>
#include <Qt3DRender/QMaterial>
#include <Qt3DRender/QParameter>
#include <Qt3DRender/QRenderPass>
#include <Qt3DRender/QShaderProgram>
#include <Qt3DRender/QTexture>
 
class QgsImageTexture;
 
#define SIP_NO_FILE

class _3D_EXPORT QgsSkyboxEntity : public Qt3DCore::QEntity
{
    Q_OBJECT
  public:
    enum SkyboxType
    {
      PanoramicSkybox,
      DistinctTexturesSkybox
    };
 
  public:
    QgsSkyboxEntity( QNode *parent = nullptr );

    virtual SkyboxType type() const = 0;
 
  protected:
    Qt3DRender::QEffect *mEffect = nullptr;
    Qt3DRender::QMaterial *mMaterial = nullptr;
    Qt3DRender::QTechnique *mGl3Technique = nullptr;
    Qt3DRender::QFilterKey *mFilterKey = nullptr;
    Qt3DRender::QRenderPass *mGl3RenderPass = nullptr;
    Qt3DExtras::QCuboidMesh *mMesh = nullptr;
    Qt3DRender::QParameter *mGammaStrengthParameter = nullptr;
    Qt3DRender::QParameter *mTextureParameter = nullptr;
};

class _3D_EXPORT QgsPanoramicSkyboxEntity : public QgsSkyboxEntity
{
    Q_OBJECT
 
  public:
    QgsPanoramicSkyboxEntity( const QString &texturePath, Qt3DCore::QNode *parent = nullptr );

    QString texturePath() const { return mTexturePath; }
    SkyboxType type() const override { return SkyboxType::PanoramicSkybox; }
 
  private:
    void reloadTexture();
 
  private:
    QString mTexturePath;
    Qt3DRender::QTextureLoader *mLoadedTexture = nullptr;
    Qt3DRender::QShaderProgram *mGlShader = nullptr;
};

class _3D_EXPORT QgsCubeFacesSkyboxEntity : public QgsSkyboxEntity
{
    Q_OBJECT
 
  public:
    QgsCubeFacesSkyboxEntity( const QString &posX, const QString &posY, const QString &posZ, const QString &negX, const QString &negY, const QString &negZ, Qt3DCore::QNode *parent = nullptr );

    SkyboxType type() const override { return SkyboxType::DistinctTexturesSkybox; }
 
  private:
    void init();
    void reloadTexture();
 
  private:
    QMap<Qt3DRender::QTextureCubeMap::CubeMapFace, QString> mCubeFacesPaths;
    Qt3DRender::QShaderProgram *mGlShader = nullptr;
    QVector<Qt3DRender::QTextureImage *> mFacesTextureImages;
    Qt3DRender::QTextureCubeMap *mCubeMap = nullptr;
};
 
#endif // QGSSKYBOXENTITY_H