sf::View Class Reference

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

#include <SFML/Graphics/View.hpp>

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

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

(

const Vector2f &

offset

)

Move the view relatively to its current position.

Parameters

offset

Move offset

See also

setCenter, rotate, zoom

move() [2/2]

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

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

(

const Vector2f &

center

)

Set the center of the view.

Parameters

center

New center

See also

setSize, getCenter

setCenter() [2/2]

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

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

(

const Vector2f &

size

)

Set the size of the view.

Parameters

size

New size

See also

setCenter, getCenter

setSize() [2/2]

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

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

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

• View.hpp