qgsshadowrenderingframegraph.h

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/***************************************************************************
  qgsshadowrenderingframegraph.h
  --------------------------------------
  Date                 : August 2020
  Copyright            : (C) 2020 by Belgacem Nedjima
  Email                : gb underscore 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 QGSSHADOWRENDERINGFRAMEGRAPH_H
#define QGSSHADOWRENDERINGFRAMEGRAPH_H
 
#include <QWindow>
#include <Qt3DRender/QCamera>
#include <Qt3DRender/QRenderSurfaceSelector>
#include <Qt3DRender/QViewport>
#include <Qt3DRender/QCameraSelector>
#include <Qt3DRender/QLayerFilter>
#include <Qt3DRender/QLayer>
#include <Qt3DRender/QRenderTargetSelector>
#include <Qt3DRender/QRenderTarget>
#include <Qt3DRender/QTexture>
#include <Qt3DRender/QClearBuffers>
#include <Qt3DRender/QParameter>
#include <Qt3DRender/QFrustumCulling>
#include <Qt3DRender/QRenderStateSet>
#include <Qt3DRender/QDepthTest>
#include <Qt3DRender/QCullFace>
#include <Qt3DRender/QPolygonOffset>
#include <Qt3DRender/QRenderCapture>
 
#include "qgspointlightsettings.h"
 
class QgsDirectionalLightSettings;
class QgsCameraController;
class QgsRectangle;
class QgsPostprocessingEntity;
class QgsPreviewQuad;
 
#define SIP_NO_FILE
 
class QgsShadowRenderingFrameGraph
{
  public:
    QgsShadowRenderingFrameGraph( QWindow *window, Qt3DRender::QCamera *mainCamera, Qt3DCore::QEntity *root );
 
    Qt3DRender::QFrameGraphNode *getFrameGraphRoot() { return mRenderSurfaceSelector; }
 
    Qt3DRender::QTexture2D *forwardRenderColorTexture() { return mForwardColorTexture; }
    Qt3DRender::QTexture2D *forwardRenderDepthTexture() { return mForwardDepthTexture; }
    Qt3DRender::QTexture2D *shadowMapTexture() { return mShadowMapTexture; }
 
    Qt3DRender::QLayer *postprocessingPassLayer() { return mPostprocessPassLayer; }
    Qt3DRender::QLayer *previewLayer() { return mPreviewLayer; }
    Qt3DRender::QLayer *castShadowsLayer() { return mCastShadowsLayer; }
    Qt3DRender::QLayer *forwardRenderLayer() { return mForwardRenderLayer; }
 
    Qt3DRender::QCamera *mainCamera() { return mMainCamera; }
    Qt3DRender::QCamera *lightCamera() { return mLightCamera; }
    QgsPostprocessingEntity *postprocessingEntity() { return mPostprocessingEntity; }
    Qt3DCore::QEntity *rootEntity() { return mRootEntity; }
 
    Qt3DRender::QRenderCapture *renderCapture() { return mRenderCapture; }
 
    bool frustumCullingEnabled() const { return mFrustumCullingEnabled; }
    void setFrustumCullingEnabled( bool enabled );
 
    bool shadowRenderingEnabled() const { return mShadowRenderingEnabled; }
    void setShadowRenderingEnabled( bool enabled );
 
    float shadowBias() const { return mShadowBias; }
    void setShadowBias( float shadowBias );
 
    int shadowMapResolution() const { return mShadowMapResolution; }
    void setShadowMapResolution( int resolution );
 
    void setClearColor( const QColor &clearColor );
    void addTexturePreviewOverlay( Qt3DRender::QTexture2D *texture, const QPointF &centerNDC, const QSizeF &size, QVector<Qt3DRender::QParameter *> additionalShaderParameters = QVector<Qt3DRender::QParameter *>() );
    void setupDirectionalLight( const QgsDirectionalLightSettings &light, float maximumShadowRenderingDistance );
  private:
    Qt3DRender::QRenderSurfaceSelector *mRenderSurfaceSelector = nullptr;
    Qt3DRender::QViewport *mMainViewPort = nullptr;
    Qt3DRender::QCameraSelector *mMainCameraSelector = nullptr;
    Qt3DRender::QLayerFilter *mForwardRenderLayerFilter = nullptr;
    Qt3DRender::QRenderTargetSelector *mForwardRenderTargetSelector = nullptr;
    Qt3DRender::QRenderTarget *mForwardRenderTarget = nullptr;
    Qt3DRender::QRenderTargetOutput *mForwardRenderTargetColorOutput = nullptr;
    Qt3DRender::QRenderTargetOutput *mForwardRenderTargetDepthOutput = nullptr;
    Qt3DRender::QTexture2D *mForwardColorTexture = nullptr;
    Qt3DRender::QTexture2D *mForwardDepthTexture = nullptr;
    Qt3DRender::QClearBuffers *mForwardClearBuffers = nullptr;
    Qt3DRender::QFrustumCulling *mFrustumCulling = nullptr;
    bool mFrustumCullingEnabled = true;
 
    Qt3DRender::QCamera *mMainCamera = nullptr;
    Qt3DRender::QLayerFilter *mPostprocessPassLayerFilter = nullptr;
    Qt3DRender::QClearBuffers *mPostprocessClearBuffers = nullptr;
 
    // texture preview
    Qt3DRender::QLayerFilter *mPreviewLayerFilter = nullptr;
    Qt3DRender::QRenderStateSet *mPreviewRenderStateSet = nullptr;
    Qt3DRender::QDepthTest *mPreviewDepthTest = nullptr;
    Qt3DRender::QCullFace *mPreviewCullFace = nullptr;
 
    // shadow rendering pass
    Qt3DRender::QRenderTargetSelector *mShadowRenderTargetSelector = nullptr;
    Qt3DRender::QRenderTarget *mShadowRenderTarget = nullptr;
    Qt3DRender::QRenderTargetOutput *mShadowRenderTargetOutput = nullptr;
    Qt3DRender::QTexture2D *mShadowMapTexture = nullptr;
    Qt3DRender::QClearBuffers *mShadowClearBuffers = nullptr;
    Qt3DRender::QCamera *mLightCamera = nullptr;
    Qt3DRender::QCameraSelector *mLightCameraSelector = nullptr;
    bool mShadowRenderingEnabled = false;
    float mShadowBias = 0.00001f;
    int mShadowMapResolution = 2048;
 
    Qt3DRender::QLayerFilter *mShadowSceneEntitiesFilter = nullptr;
    Qt3DRender::QRenderStateSet *mShadowRenderStateSet = nullptr;
    Qt3DRender::QCullFace *mShadowCullFace = nullptr;
    Qt3DRender::QDepthTest *mShadowDepthTest = nullptr;
 
    Qt3DRender::QRenderCapture *mRenderCapture = nullptr;
 
    QVector3D mLightDirection = QVector3D( 0.0, -1.0f, 0.0f );
 
    Qt3DCore::QEntity *mRootEntity = nullptr;
 
    Qt3DRender::QLayer *mPostprocessPassLayer = nullptr;
    Qt3DRender::QLayer *mPreviewLayer = nullptr;
    Qt3DRender::QLayer *mForwardRenderLayer = nullptr;
    Qt3DRender::QLayer *mCastShadowsLayer = nullptr;
 
    QgsPostprocessingEntity *mPostprocessingEntity = nullptr;
 
    QVector<QgsPreviewQuad *> mPreviewQuads;
 
    Qt3DRender::QFrameGraphNode *constructShadowRenderPass();
    Qt3DRender::QFrameGraphNode *constructForwardRenderPass();
    Qt3DRender::QFrameGraphNode *constructTexturesPreviewPass();
    Qt3DRender::QFrameGraphNode *constructPostprocessingPass();
 
    Q_DISABLE_COPY( QgsShadowRenderingFrameGraph )
};
 
#endif // QGSSHADOWRENDERINGFRAMEGRAPH_H