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							| @@ -0,0 +1,343 @@ | ||||
| //////////////////////////////////////////////////////////// | ||||
| // | ||||
| // SFML - Simple and Fast Multimedia Library | ||||
| // Copyright (C) 2007-2018 Laurent Gomila (laurent@sfml-dev.org) | ||||
| // | ||||
| // This software is provided 'as-is', without any express or implied warranty. | ||||
| // In no event will the authors be held liable for any damages arising from the use of this software. | ||||
| // | ||||
| // Permission is granted to anyone to use this software for any purpose, | ||||
| // including commercial applications, and to alter it and redistribute it freely, | ||||
| // subject to the following restrictions: | ||||
| // | ||||
| // 1. The origin of this software must not be misrepresented; | ||||
| //    you must not claim that you wrote the original software. | ||||
| //    If you use this software in a product, an acknowledgment | ||||
| //    in the product documentation would be appreciated but is not required. | ||||
| // | ||||
| // 2. Altered source versions must be plainly marked as such, | ||||
| //    and must not be misrepresented as being the original software. | ||||
| // | ||||
| // 3. This notice may not be removed or altered from any source distribution. | ||||
| // | ||||
| //////////////////////////////////////////////////////////// | ||||
|  | ||||
| #ifndef SFML_VIEW_HPP | ||||
| #define SFML_VIEW_HPP | ||||
|  | ||||
| //////////////////////////////////////////////////////////// | ||||
| // Headers | ||||
| //////////////////////////////////////////////////////////// | ||||
| #include <SFML/Graphics/Export.hpp> | ||||
| #include <SFML/Graphics/Rect.hpp> | ||||
| #include <SFML/Graphics/Transform.hpp> | ||||
| #include <SFML/System/Vector2.hpp> | ||||
|  | ||||
|  | ||||
| namespace sf | ||||
| { | ||||
| //////////////////////////////////////////////////////////// | ||||
| /// \brief 2D camera that defines what region is shown on screen | ||||
| /// | ||||
| //////////////////////////////////////////////////////////// | ||||
| class SFML_GRAPHICS_API View | ||||
| { | ||||
| public: | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Default constructor | ||||
|     /// | ||||
|     /// This constructor creates a default view of (0, 0, 1000, 1000) | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     View(); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Construct the view from a rectangle | ||||
|     /// | ||||
|     /// \param rectangle Rectangle defining the zone to display | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     explicit View(const FloatRect& rectangle); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Construct the view from its center and size | ||||
|     /// | ||||
|     /// \param center Center of the zone to display | ||||
|     /// \param size   Size of zone to display | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     View(const Vector2f& center, const Vector2f& size); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Set the center of the view | ||||
|     /// | ||||
|     /// \param x X coordinate of the new center | ||||
|     /// \param y Y coordinate of the new center | ||||
|     /// | ||||
|     /// \see setSize, getCenter | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void setCenter(float x, float y); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Set the center of the view | ||||
|     /// | ||||
|     /// \param center New center | ||||
|     /// | ||||
|     /// \see setSize, getCenter | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void setCenter(const Vector2f& center); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Set the size of the view | ||||
|     /// | ||||
|     /// \param width  New width of the view | ||||
|     /// \param height New height of the view | ||||
|     /// | ||||
|     /// \see setCenter, getCenter | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void setSize(float width, float height); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Set the size of the view | ||||
|     /// | ||||
|     /// \param size New size | ||||
|     /// | ||||
|     /// \see setCenter, getCenter | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void setSize(const Vector2f& size); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Set the orientation of the view | ||||
|     /// | ||||
|     /// The default rotation of a view is 0 degree. | ||||
|     /// | ||||
|     /// \param angle New angle, in degrees | ||||
|     /// | ||||
|     /// \see getRotation | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void setRotation(float angle); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Set the target viewport | ||||
|     /// | ||||
|     /// The viewport is the rectangle into which the contents of the | ||||
|     /// view are displayed, expressed as a factor (between 0 and 1) | ||||
|     /// of the size of the RenderTarget to which the view is applied. | ||||
|     /// For example, a view which takes the left side of the target would | ||||
|     /// be defined with View.setViewport(sf::FloatRect(0, 0, 0.5, 1)). | ||||
|     /// By default, a view has a viewport which covers the entire target. | ||||
|     /// | ||||
|     /// \param viewport New viewport rectangle | ||||
|     /// | ||||
|     /// \see getViewport | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void setViewport(const FloatRect& viewport); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Reset the view to the given rectangle | ||||
|     /// | ||||
|     /// Note that this function resets the rotation angle to 0. | ||||
|     /// | ||||
|     /// \param rectangle Rectangle defining the zone to display | ||||
|     /// | ||||
|     /// \see setCenter, setSize, setRotation | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void reset(const FloatRect& rectangle); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Get the center of the view | ||||
|     /// | ||||
|     /// \return Center of the view | ||||
|     /// | ||||
|     /// \see getSize, setCenter | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     const Vector2f& getCenter() const; | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Get the size of the view | ||||
|     /// | ||||
|     /// \return Size of the view | ||||
|     /// | ||||
|     /// \see getCenter, setSize | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     const Vector2f& getSize() const; | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Get the current orientation of the view | ||||
|     /// | ||||
|     /// \return Rotation angle of the view, in degrees | ||||
|     /// | ||||
|     /// \see setRotation | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     float getRotation() const; | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Get the target viewport rectangle of the view | ||||
|     /// | ||||
|     /// \return Viewport rectangle, expressed as a factor of the target size | ||||
|     /// | ||||
|     /// \see setViewport | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     const FloatRect& getViewport() const; | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Move the view relatively to its current position | ||||
|     /// | ||||
|     /// \param offsetX X coordinate of the move offset | ||||
|     /// \param offsetY Y coordinate of the move offset | ||||
|     /// | ||||
|     /// \see setCenter, rotate, zoom | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void move(float offsetX, float offsetY); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Move the view relatively to its current position | ||||
|     /// | ||||
|     /// \param offset Move offset | ||||
|     /// | ||||
|     /// \see setCenter, rotate, zoom | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void move(const Vector2f& offset); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Rotate the view relatively to its current orientation | ||||
|     /// | ||||
|     /// \param angle Angle to rotate, in degrees | ||||
|     /// | ||||
|     /// \see setRotation, move, zoom | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void rotate(float angle); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Resize the view rectangle relatively to its current size | ||||
|     /// | ||||
|     /// Resizing the view simulates a zoom, as the zone displayed on | ||||
|     /// screen grows or shrinks. | ||||
|     /// \a factor is a multiplier: | ||||
|     /// \li 1 keeps the size unchanged | ||||
|     /// \li > 1 makes the view bigger (objects appear smaller) | ||||
|     /// \li < 1 makes the view smaller (objects appear bigger) | ||||
|     /// | ||||
|     /// \param factor Zoom factor to apply | ||||
|     /// | ||||
|     /// \see setSize, move, rotate | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     void zoom(float factor); | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Get the projection transform of the view | ||||
|     /// | ||||
|     /// This function is meant for internal use only. | ||||
|     /// | ||||
|     /// \return Projection transform defining the view | ||||
|     /// | ||||
|     /// \see getInverseTransform | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     const Transform& getTransform() const; | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     /// \brief Get the inverse projection transform of the view | ||||
|     /// | ||||
|     /// This function is meant for internal use only. | ||||
|     /// | ||||
|     /// \return Inverse of the projection transform defining the view | ||||
|     /// | ||||
|     /// \see getTransform | ||||
|     /// | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     const Transform& getInverseTransform() const; | ||||
|  | ||||
| private: | ||||
|  | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     // Member data | ||||
|     //////////////////////////////////////////////////////////// | ||||
|     Vector2f          m_center;              ///< Center of the view, in scene coordinates | ||||
|     Vector2f          m_size;                ///< Size of the view, in scene coordinates | ||||
|     float             m_rotation;            ///< Angle of rotation of the view rectangle, in degrees | ||||
|     FloatRect         m_viewport;            ///< Viewport rectangle, expressed as a factor of the render-target's size | ||||
|     mutable Transform m_transform;           ///< Precomputed projection transform corresponding to the view | ||||
|     mutable Transform m_inverseTransform;    ///< Precomputed inverse projection transform corresponding to the view | ||||
|     mutable bool      m_transformUpdated;    ///< Internal state telling if the transform needs to be updated | ||||
|     mutable bool      m_invTransformUpdated; ///< Internal state telling if the inverse transform needs to be updated | ||||
| }; | ||||
|  | ||||
| } // namespace sf | ||||
|  | ||||
|  | ||||
| #endif // SFML_VIEW_HPP | ||||
|  | ||||
|  | ||||
| //////////////////////////////////////////////////////////// | ||||
| /// \class sf::View | ||||
| /// \ingroup graphics | ||||
| /// | ||||
| /// sf::View defines a camera in the 2D scene. This is a | ||||
| /// very powerful concept: you can scroll, rotate or zoom | ||||
| /// the entire scene without altering the way that your | ||||
| /// drawable objects are drawn. | ||||
| /// | ||||
| /// A view is composed of a source rectangle, which defines | ||||
| /// what part of the 2D scene is shown, and a target viewport, | ||||
| /// which defines where the contents of the source rectangle | ||||
| /// will be displayed on the render target (window or texture). | ||||
| /// | ||||
| /// The viewport allows to map the scene to a custom part | ||||
| /// of the render target, and can be used for split-screen | ||||
| /// or for displaying a minimap, for example. If the source | ||||
| /// rectangle doesn't have the same size as the viewport, its | ||||
| /// contents will be stretched to fit in. | ||||
| /// | ||||
| /// To apply a view, you have to assign it to the render target. | ||||
| /// Then, objects drawn in this render target will be | ||||
| /// affected by the view until you use another view. | ||||
| /// | ||||
| /// Usage example: | ||||
| /// \code | ||||
| /// sf::RenderWindow window; | ||||
| /// sf::View view; | ||||
| /// | ||||
| /// // Initialize the view to a rectangle located at (100, 100) and with a size of 400x200 | ||||
| /// view.reset(sf::FloatRect(100, 100, 400, 200)); | ||||
| /// | ||||
| /// // Rotate it by 45 degrees | ||||
| /// view.rotate(45); | ||||
| /// | ||||
| /// // Set its target viewport to be half of the window | ||||
| /// view.setViewport(sf::FloatRect(0.f, 0.f, 0.5f, 1.f)); | ||||
| /// | ||||
| /// // Apply it | ||||
| /// window.setView(view); | ||||
| /// | ||||
| /// // Render stuff | ||||
| /// window.draw(someSprite); | ||||
| /// | ||||
| /// // Set the default view back | ||||
| /// window.setView(window.getDefaultView()); | ||||
| /// | ||||
| /// // Render stuff not affected by the view | ||||
| /// window.draw(someText); | ||||
| /// \endcode | ||||
| /// | ||||
| /// See also the note on coordinates and undistorted rendering in sf::Transformable. | ||||
| /// | ||||
| /// \see sf::RenderWindow, sf::RenderTexture | ||||
| /// | ||||
| //////////////////////////////////////////////////////////// | ||||
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