diff --git a/include/SFML/Graphics/Sprite.hpp b/include/SFML/Graphics/Sprite.hpp index 954881d8..eda67608 100644 --- a/include/SFML/Graphics/Sprite.hpp +++ b/include/SFML/Graphics/Sprite.hpp @@ -255,6 +255,8 @@ private : /// used by a sf::Sprite (i.e. never write a function that /// uses a local sf::Texture instance for creating a sprite). /// +/// See also the note on coordinates and undistorted rendering in sf::Transformable. +/// /// Usage example: /// \code /// // Declare and load a texture diff --git a/include/SFML/Graphics/Text.hpp b/include/SFML/Graphics/Text.hpp index 04abd243..aea83ecf 100644 --- a/include/SFML/Graphics/Text.hpp +++ b/include/SFML/Graphics/Text.hpp @@ -330,6 +330,8 @@ private : /// used by a sf::Text (i.e. never write a function that /// uses a local sf::Font instance for creating a text). /// +/// See also the note on coordinates and undistorted rendering in sf::Transformable. +/// /// Usage example: /// \code /// // Declare and load a font diff --git a/include/SFML/Graphics/Transformable.hpp b/include/SFML/Graphics/Transformable.hpp index 28fb3863..fccf8f1e 100644 --- a/include/SFML/Graphics/Transformable.hpp +++ b/include/SFML/Graphics/Transformable.hpp @@ -412,6 +412,18 @@ private : /// }; /// \endcode /// +/// A note on coordinates and undistorted rendering: \n +/// By default, SFML (or more exactly, OpenGL) may interpolate drawable objects +/// such as sprites or texts when rendering. While this allows transitions +/// like slow movements or rotations to appear smoothly, it can lead to +/// unwanted results in some cases, for example blurred or distorted objects. +/// In order to render a sf::Drawable object pixel-perfectly, make sure +/// the involved coordinates allow a 1:1 mapping of pixels in the window +/// to texels (pixels in the texture). More specifically, this means: +/// * The object's position, origin and scale have no fractional part +/// * The object's and the view's rotation are a multiple of 90 degrees +/// * The view's center and size have no fractional part +/// /// \see sf::Transform /// //////////////////////////////////////////////////////////// diff --git a/include/SFML/Graphics/View.hpp b/include/SFML/Graphics/View.hpp index 7713aef6..0004a5b5 100644 --- a/include/SFML/Graphics/View.hpp +++ b/include/SFML/Graphics/View.hpp @@ -336,6 +336,8 @@ private : /// window.draw(someText); /// \endcode /// +/// See also the note on coordinates and undistorted rendering in sf::Transformable. +/// /// \see sf::RenderWindow, sf::RenderTexture /// ////////////////////////////////////////////////////////////