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sf::VertexArray Class Reference
Graphics module

Define a set of one or more 2D primitives. More...

`#include <VertexArray.hpp>`

Inheritance diagram for sf::VertexArray:

## Public Member Functions
| VertexArray ()
| Default constructor. More...
| VertexArray (PrimitiveType type, unsigned int vertexCount=0)
| Construct the vertex array with a type and an initial number of vertices. More...
unsigned int | getVertexCount () const
| Return the vertex count. More...
Vertex & | operator[] (unsigned int index)
| Get a read-write access to a vertex by its index. More...
const Vertex & | operator[] (unsigned int index) const
| Get a read-only access to a vertex by its index. More...
void | clear ()
| Clear the vertex array. More...
void | resize (unsigned int vertexCount)
| Resize the vertex array. More...
void | append (const Vertex &vertex)
| Add a vertex to the array. More...
void | setPrimitiveType (PrimitiveType type)
| Set the type of primitives to draw. More...
PrimitiveType | getPrimitiveType () const
| Get the type of primitives drawn by the vertex array. More...
FloatRect | getBounds () const
| Compute the bounding rectangle of the vertex array. More...

## Detailed Description

Define a set of one or more 2D primitives.

sf::VertexArray is a very simple wrapper around a dynamic array of vertices and a primitives type.

It inherits sf::Drawable, but unlike other drawables it is not transformable.

Example:

sf::VertexArray lines(sf::LinesStrip, 4);
lines[0].position = sf::Vector2f(10, 0);
lines[1].position = sf::Vector2f(20, 0);
lines[2].position = sf::Vector2f(30, 5);
lines[3].position = sf::Vector2f(40, 2);
window.draw(lines);

See Also
  sf::Vertex

Definition at line 45 of file VertexArray.hpp.

## Constructor & Destructor Documentation

sf::VertexArray::VertexArray | ( | ) |  |

Default constructor.

Creates an empty vertex array.

sf::VertexArray::VertexArray | ( | PrimitiveType | type,
|  | unsigned int | vertexCount = `0`
| ) |  |
| explicit

Construct the vertex array with a type and an initial number of vertices.

Parameters

  type | Type of primitives
  vertexCount | Initial number of vertices in the array

## Member Function Documentation

void sf::VertexArray::append | ( | const Vertex & | vertex) |  |

Add a vertex to the array.

Parameters

  vertex | Vertex to add

void sf::VertexArray::clear | ( | ) |  |

Clear the vertex array.

This function removes all the vertices from the array. It doesn't deallocate the corresponding memory, so that adding new vertices after clearing doesn't involve reallocating all the memory.

FloatRect sf::VertexArray::getBounds | ( | ) |  | const

Compute the bounding rectangle of the vertex array.

This function returns the axis-aligned rectangle that contains all the vertices of the array.

Returns
  Bounding rectangle of the vertex array

PrimitiveType sf::VertexArray::getPrimitiveType | ( | ) |  | const

Get the type of primitives drawn by the vertex array.

Returns
  Primitive type

unsigned int sf::VertexArray::getVertexCount | ( | ) |  | const

Return the vertex count.

Returns
  Number of vertices in the array

Vertex& sf::VertexArray::operator[] | ( | unsigned int | index) |  |

Get a read-write access to a vertex by its index.

This function doesn't check index, it must be in range [0, getVertexCount() - 1]. The behaviour is undefined otherwise.

Parameters

  index | Index of the vertex to get

Returns
  Reference to the index-th vertex

See Also
  getVertexCount

const Vertex& sf::VertexArray::operator[] | ( | unsigned int | index) |  | const

Get a read-only access to a vertex by its index.

This function doesn't check index, it must be in range [0, getVertexCount() - 1]. The behaviour is undefined otherwise.

Parameters

  index | Index of the vertex to get

Returns
  Const reference to the index-th vertex

See Also
  getVertexCount

void sf::VertexArray::resize | ( | unsigned int | vertexCount) |  |

Resize the vertex array.

If vertexCount is greater than the current size, the previous vertices are kept and new (default-constructed) vertices are added. If vertexCount is less than the current size, existing vertices are removed from the array.

Parameters

  vertexCount | New size of the array (number of vertices)

void sf::VertexArray::setPrimitiveType | ( | PrimitiveType | type) |  |

Set the type of primitives to draw.

This function defines how the vertices must be interpreted when it's time to draw them:

- As points
- As lines
- As triangles
- As quads The default primitive type is sf::Points.

Parameters

  type | Type of primitive

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

- VertexArray.hpp