VerticalPerspectiveProjection.h

// SPDX-License-Identifier: LGPL-2.1-or-later
//
// SPDX-FileCopyrightText: 2013 Bernhard Beschow <bbeschow@cs.tu-berlin.de>
//
 
#ifndef MARBLE_VERTICALPERSPECTIVEPROJECTION_H
#define MARBLE_VERTICALPERSPECTIVEPROJECTION_H
 
#include "AbstractProjection.h"
#include "AzimuthalProjection.h"
 
namespace Marble
{
 
class VerticalPerspectiveProjectionPrivate;
 
/**
 * @short A class to implement the spherical projection used by the "Globe" view.
 */
 
class VerticalPerspectiveProjection : public AzimuthalProjection
{
    // Not a QObject so far because we don't need to send signals.
public:
    /**
     * @brief Construct a new VerticalPerspectiveProjection.
     */
    VerticalPerspectiveProjection();
 
    ~VerticalPerspectiveProjection() override;
 
    /**
     * @brief Returns the user-visible name of the projection.
     */
    QString name() const override;
 
    /**
     * @brief Returns a short user description of the projection
     * that can be used in tooltips or dialogs.
     */
    QString description() const override;
 
    /**
     * @brief Returns an icon for the projection.
     */
    QIcon icon() const override;
 
    qreal clippingRadius() const override;
 
    /**
     * @brief Get the screen coordinates corresponding to geographical coordinates in the map.
     * @param coordinates  the coordinates of the requested pixel position
     * @param params the viewport parameters
     * @param x      the x coordinate of the pixel is returned through this parameter
     * @param y      the y coordinate of the pixel is returned through this parameter
     * @param globeHidesPoint whether the globe hides the point
     * @return @c true  if the geographical coordinates are visible on the screen
     *         @c false if the geographical coordinates are not visible on the screen
     */
    bool screenCoordinates(const GeoDataCoordinates &coordinates, const ViewportParams *params, qreal &x, qreal &y, bool &globeHidesPoint) const override;
 
    bool screenCoordinates(const GeoDataCoordinates &coordinates,
                           const ViewportParams *viewport,
                           qreal *x,
                           qreal &y,
                           int &pointRepeatNum,
                           const QSizeF &size,
                           bool &globeHidesPoint) const override;
 
    using AbstractProjection::screenCoordinates;
 
    /**
     * @brief Get the earth coordinates corresponding to a pixel in the map.
     * @param x      the x coordinate of the pixel
     * @param y      the y coordinate of the pixel
     * @param params the viewport parameters
     * @param lon    the longitude angle is returned through this parameter
     * @param lat    the latitude angle is returned through this parameter
     * @param unit   the unit
     * @return @c true  if the pixel (x, y) is within the globe
     *         @c false if the pixel (x, y) is outside the globe, i.e. in space.
     */
    bool geoCoordinates(const int x,
                        const int y,
                        const ViewportParams *params,
                        qreal &lon,
                        qreal &lat,
                        GeoDataCoordinates::Unit unit = GeoDataCoordinates::Degree) const override;
 
protected:
    explicit VerticalPerspectiveProjection(VerticalPerspectiveProjectionPrivate *dd);
 
private:
    Q_DECLARE_PRIVATE(VerticalPerspectiveProjection)
    Q_DISABLE_COPY(VerticalPerspectiveProjection)
};
 
}
 
#endif