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SFML 2.5.1

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Public Member Functions | List of all members
sf::View Class Reference
Graphics module

2D camera that defines what region is shown on screen More...

`#include <View.hpp>`

## Public Member Functions
| View ()
| Default constructor. More...
| View (const FloatRect &rectangle)
| Construct the view from a rectangle. More...
| View (const Vector2f &center, const Vector2f &size)
| Construct the view from its center and size. More...
void | setCenter (float x, float y)
| Set the center of the view. More...
void | setCenter (const Vector2f &center)
| Set the center of the view. More...
void | setSize (float width, float height)
| Set the size of the view. More...
void | setSize (const Vector2f &size)
| Set the size of the view. More...
void | setRotation (float angle)
| Set the orientation of the view. More...
void | setViewport (const FloatRect &viewport)
| Set the target viewport. More...
void | reset (const FloatRect &rectangle)
| Reset the view to the given rectangle. More...
const Vector2f & | getCenter () const
| Get the center of the view. More...
const Vector2f & | getSize () const
| Get the size of the view. More...
float | getRotation () const
| Get the current orientation of the view. More...
const FloatRect & | getViewport () const
| Get the target viewport rectangle of the view. More...
void | move (float offsetX, float offsetY)
| Move the view relatively to its current position. More...
void | move (const Vector2f &offset)
| Move the view relatively to its current position. More...
void | rotate (float angle)
| Rotate the view relatively to its current orientation. More...
void | zoom (float factor)
| Resize the view rectangle relatively to its current size. More...
const Transform & | getTransform () const
| Get the projection transform of the view. More...
const Transform & | getInverseTransform () const
| Get the inverse projection transform of the view. More...

## Detailed Description

2D camera that defines what region is shown on screen

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:

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);

See also the note on coordinates and undistorted rendering in sf::Transformable.

See also
  sf::RenderWindow, sf::RenderTexture

Definition at line 43 of file View.hpp.

## Constructor & Destructor Documentation

## ◆ View() [1/3]

sf::View::View | ( |  | ) |

Default constructor.

This constructor creates a default view of (0, 0, 1000, 1000)

## ◆ View() [2/3]

sf::View::View | ( | const FloatRect & | rectangle | ) |
| explicit

Construct the view from a rectangle.

Parameters

  rectangle | Rectangle defining the zone to display

## ◆ View() [3/3]

sf::View::View | ( | const Vector2f & | center,
|  | const Vector2f & | size
| ) |  |

Construct the view from its center and size.

Parameters

  center | Center of the zone to display
  size | Size of zone to display

## Member Function Documentation

## ◆ getCenter()

const Vector2f& sf::View::getCenter | ( |  | ) | const

Get the center of the view.

Returns
  Center of the view

See also
  getSize, setCenter

## ◆ getInverseTransform()

const Transform& sf::View::getInverseTransform | ( |  | ) | const

Get the inverse projection transform of the view.

This function is meant for internal use only.

Returns
  Inverse of the projection transform defining the view

See also
  getTransform

## ◆ getRotation()

float sf::View::getRotation | ( |  | ) | const

Get the current orientation of the view.

Returns
  Rotation angle of the view, in degrees

See also
  setRotation

## ◆ getSize()

const Vector2f& sf::View::getSize | ( |  | ) | const

Get the size of the view.

Returns
  Size of the view

See also
  getCenter, setSize

## ◆ getTransform()

const Transform& sf::View::getTransform | ( |  | ) | const

Get the projection transform of the view.

This function is meant for internal use only.

Returns
  Projection transform defining the view

See also
  getInverseTransform

## ◆ getViewport()

const FloatRect& sf::View::getViewport | ( |  | ) | const

Get the target viewport rectangle of the view.

Returns
  Viewport rectangle, expressed as a factor of the target size

See also
  setViewport

## ◆ move() [1/2]

void sf::View::move | ( | float | offsetX,
|  | float | offsetY
| ) |  |

Move the view relatively to its current position.

Parameters

  offsetX | X coordinate of the move offset
  offsetY | Y coordinate of the move offset

See also
  setCenter, rotate, zoom

## ◆ move() [2/2]

void sf::View::move | ( | const Vector2f & | offset | ) |

Move the view relatively to its current position.

Parameters

  offset | Move offset

See also
  setCenter, rotate, zoom

## ◆ reset()

void sf::View::reset | ( | const FloatRect & | rectangle | ) |

Reset the view to the given rectangle.

Note that this function resets the rotation angle to 0.

Parameters

  rectangle | Rectangle defining the zone to display

See also
  setCenter, setSize, setRotation

## ◆ rotate()

void sf::View::rotate | ( | float | angle | ) |

Rotate the view relatively to its current orientation.

Parameters

  angle | Angle to rotate, in degrees

See also
  setRotation, move, zoom

## ◆ setCenter() [1/2]

void sf::View::setCenter | ( | float | x,
|  | float | y
| ) |  |

Set the center of the view.

Parameters

  x | X coordinate of the new center
  y | Y coordinate of the new center

See also
  setSize, getCenter

## ◆ setCenter() [2/2]

void sf::View::setCenter | ( | const Vector2f & | center | ) |

Set the center of the view.

Parameters

  center | New center

See also
  setSize, getCenter

## ◆ setRotation()

void sf::View::setRotation | ( | float | angle | ) |

Set the orientation of the view.

The default rotation of a view is 0 degree.

Parameters

  angle | New angle, in degrees

See also
  getRotation

## ◆ setSize() [1/2]

void sf::View::setSize | ( | float | width,
|  | float | height
| ) |  |

Set the size of the view.

Parameters

  width | New width of the view
  height | New height of the view

See also
  setCenter, getCenter

## ◆ setSize() [2/2]

void sf::View::setSize | ( | const Vector2f & | size | ) |

Set the size of the view.

Parameters

  size | New size

See also
  setCenter, getCenter

## ◆ setViewport()

void sf::View::setViewport | ( | const FloatRect & | viewport | ) |

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.

Parameters

  viewport | New viewport rectangle

See also
  getViewport

## ◆ zoom()

void sf::View::zoom | ( | float | factor | ) |

Resize the view rectangle relatively to its current size.

Resizing the view simulates a zoom, as the zone displayed on screen grows or shrinks. factor is a multiplier:

- 1 keeps the size unchanged
- > 1 makes the view bigger (objects appear smaller)
- < 1 makes the view smaller (objects appear bigger)

Parameters

  factor | Zoom factor to apply

See also
  setSize, move, rotate

The documentation for this class was generated from the following file:

- View.hpp