ecvViewportParameters.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
// Local
#include "CV_db.h"
#include "ecvGLMatrix.h"
#include "ecvSerializableObject.h"
 
class QRect;
 
class CV_DB_LIB_API ecvViewportParameters : public ccSerializableObject {
public:  // functions
    ecvViewportParameters();
 
    ecvViewportParameters(const ecvViewportParameters& params);
 
    // inherited from ccSerializableObject
    bool isSerializable() const override { return true; }
    bool toFile(QFile& out, short dataVersion) const override;
    short minimumFileVersion() const override;
    bool fromFile(QFile& in,
                  short dataVersion,
                  int flags,
                  LoadedIDMap& oldToNewIDMap) override;
 
    void setPivotPoint(const CCVector3d& P, bool autoUpdateFocal = true);
 
    const CCVector3d& getPivotPoint() const { return pivotPoint; }
 
    //* _
    void setCameraCenter(const CCVector3d& C, bool autoUpdateFocal = true);
 
    const CCVector3d& getCameraCenter() const { return cameraCenter; }
 
 
    void setFocalDistance(double distance);
 
    double getFocalDistance() const { return focalDistance; }
 
    static double IncrementToZNearCoef(int i, int iMax);
 
    static int ZNearCoefToIncrement(double coef, int iMax);
 
    ccGLMatrixd computeViewMatrix() const;
 
    ccGLMatrixd computeScaleMatrix(const QRect& glViewport) const;
 
 
    CCVector3d getViewDir() const;
 
 
    CCVector3d getUpDir() const;
 
 
    const CCVector3d& getRotationCenter() const;
 
 
    double computeDistanceToHalfWidthRatio() const;
 
 
    double computeDistanceToWidthRatio() const;
 
    double computeWidthAtFocalDist() const;
 
    double computePixelSize(int glWidth) const;
 
public:  // variables
    ccGLMatrixd viewMat;
 
    float defaultPointSize;
    float defaultLineWidth;
 
 
    float pixelSize;
 
    float zoom;
 
    bool perspectiveView;
 
    bool objectCenteredView;
 
    double zNearCoef;
    double zNear;
    double zFar;
 
    CCVector3d focal;
 
    CCVector3d up;
 
    float fov_deg;
    float cameraAspectRatio;
 
protected:
    double focalDistance;
 
    CCVector3d pivotPoint;
 
    CCVector3d cameraCenter;
};