Specialized shape representing a circle.
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#include <SFML/Graphics/CircleShape.hpp>
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| void | update () |
| | Recompute the internal geometry of the shape.
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Specialized shape representing a circle.
This class inherits all the functions of sf::Transformable (position, rotation, scale, bounds, ...) as well as the functions of sf::Shape (outline, color, texture, ...).
Usage example:
...
window.draw(circle);
Specialized shape representing a circle.
void setRadius(float radius)
Set the radius of the circle.
static const Color Red
Red predefined color.
void setOutlineThickness(float thickness)
Set the thickness of the shape's outline.
void setOutlineColor(Color color)
Set the outline color of the shape.
Since the graphics card can't draw perfect circles, we have to fake them with multiple triangles connected to each other. The "points count" property of sf::CircleShape defines how many of these triangles to use, and therefore defines the quality of the circle.
The number of points can also be used for another purpose; with small numbers you can create any regular polygon shape: equilateral triangle, square, pentagon, hexagon, ...
- See also
sf::Shape, sf::RectangleShape, sf::ConvexShape
Definition at line 45 of file CircleShape.hpp.
◆ CircleShape()
| sf::CircleShape::CircleShape |
( |
float | radius = 0, |
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std::size_t | pointCount = 30 ) |
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explicit |
Default constructor.
- Parameters
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| radius | Radius of the circle |
| pointCount | Number of points composing the circle |
◆ getFillColor()
| Color sf::Shape::getFillColor |
( |
| ) |
const |
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nodiscardinherited |
Get the fill color of the shape.
- Returns
- Fill color of the shape
- See also
setFillColor
◆ getGeometricCenter()
| Vector2f sf::CircleShape::getGeometricCenter |
( |
| ) |
const |
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nodiscardoverridevirtual |
Get the geometric center of the circle.
The returned point is in local coordinates, that is, the shape's transforms (position, rotation, scale) are not taken into account.
- Returns
- The geometric center of the shape
Reimplemented from sf::Shape.
◆ getGlobalBounds()
| FloatRect sf::Shape::getGlobalBounds |
( |
| ) |
const |
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nodiscardinherited |
Get the global (non-minimal) bounding rectangle of the entity.
The returned rectangle is in global coordinates, which means that it takes into account the transformations (translation, rotation, scale, ...) that are applied to the entity. In other words, this function returns the bounds of the shape in the global 2D world's coordinate system.
This function does not necessarily return the minimal bounding rectangle. It merely ensures that the returned rectangle covers all the vertices (but possibly more). This allows for a fast approximation of the bounds as a first check; you may want to use more precise checks on top of that.
- Returns
- Global bounding rectangle of the entity
◆ getInverseTransform()
| const Transform & sf::Transformable::getInverseTransform |
( |
| ) |
const |
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nodiscardinherited |
get the inverse of the combined transform of the object
- Returns
- Inverse of the combined transformations applied to the object
- See also
getTransform
◆ getLocalBounds()
| FloatRect sf::Shape::getLocalBounds |
( |
| ) |
const |
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nodiscardinherited |
Get the local bounding rectangle of the entity.
The returned rectangle is in local coordinates, which means that it ignores the transformations (translation, rotation, scale, ...) that are applied to the entity. In other words, this function returns the bounds of the entity in the entity's coordinate system.
- Returns
- Local bounding rectangle of the entity
◆ getOrigin()
| Vector2f sf::Transformable::getOrigin |
( |
| ) |
const |
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nodiscardinherited |
get the local origin of the object
- Returns
- Current origin
- See also
setOrigin
◆ getOutlineColor()
| Color sf::Shape::getOutlineColor |
( |
| ) |
const |
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nodiscardinherited |
Get the outline color of the shape.
- Returns
- Outline color of the shape
- See also
setOutlineColor
◆ getOutlineThickness()
| float sf::Shape::getOutlineThickness |
( |
| ) |
const |
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nodiscardinherited |
Get the outline thickness of the shape.
- Returns
- Outline thickness of the shape
- See also
setOutlineThickness
◆ getPoint()
| Vector2f sf::CircleShape::getPoint |
( |
std::size_t | index | ) |
const |
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nodiscardoverridevirtual |
Get a point of the circle.
The returned point is in local coordinates, that is, the shape's transforms (position, rotation, scale) are not taken into account. The result is undefined if index is out of the valid range.
- Parameters
-
- Returns
index-th point of the shape
Implements sf::Shape.
◆ getPointCount()
| std::size_t sf::CircleShape::getPointCount |
( |
| ) |
const |
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nodiscardoverridevirtual |
Get the number of points of the circle.
- Returns
- Number of points of the circle
- See also
setPointCount
Implements sf::Shape.
◆ getPosition()
| Vector2f sf::Transformable::getPosition |
( |
| ) |
const |
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nodiscardinherited |
get the position of the object
- Returns
- Current position
- See also
setPosition
◆ getRadius()
| float sf::CircleShape::getRadius |
( |
| ) |
const |
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nodiscard |
Get the radius of the circle.
- Returns
- Radius of the circle
- See also
setRadius
◆ getRotation()
| Angle sf::Transformable::getRotation |
( |
| ) |
const |
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nodiscardinherited |
get the orientation of the object
The rotation is always in the range [0, 360].
- Returns
- Current rotation
- See also
setRotation
◆ getScale()
| Vector2f sf::Transformable::getScale |
( |
| ) |
const |
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nodiscardinherited |
get the current scale of the object
- Returns
- Current scale factors
- See also
setScale
◆ getTexture()
| const Texture * sf::Shape::getTexture |
( |
| ) |
const |
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nodiscardinherited |
Get the source texture of the shape.
If the shape has no source texture, a nullptr is returned. The returned pointer is const, which means that you can't modify the texture when you retrieve it with this function.
- Returns
- Pointer to the shape's texture
- See also
setTexture
◆ getTextureRect()
| const IntRect & sf::Shape::getTextureRect |
( |
| ) |
const |
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nodiscardinherited |
Get the sub-rectangle of the texture displayed by the shape.
- Returns
- Texture rectangle of the shape
- See also
setTextureRect
◆ getTransform()
| const Transform & sf::Transformable::getTransform |
( |
| ) |
const |
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nodiscardinherited |
get the combined transform of the object
- Returns
- Transform combining the position/rotation/scale/origin of the object
- See also
getInverseTransform
◆ move()
| void sf::Transformable::move |
( |
Vector2f | offset | ) |
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inherited |
Move the object by a given offset.
This function adds to the current position of the object, unlike setPosition which overwrites it. Thus, it is equivalent to the following code:
- Parameters
-
- See also
setPosition
◆ rotate()
| void sf::Transformable::rotate |
( |
Angle | angle | ) |
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inherited |
Rotate the object.
This function adds to the current rotation of the object, unlike setRotation which overwrites it. Thus, it is equivalent to the following code:
- Parameters
-
◆ scale()
| void sf::Transformable::scale |
( |
Vector2f | factor | ) |
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inherited |
Scale the object.
This function multiplies the current scale of the object, unlike setScale which overwrites it. Thus, it is equivalent to the following code:
object.setScale(
scale.x * factor.x,
scale.y * factor.y);
- Parameters
-
- See also
setScale
◆ setFillColor()
| void sf::Shape::setFillColor |
( |
Color | color | ) |
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inherited |
Set the fill color of the shape.
This color is modulated (multiplied) with the shape's texture if any. It can be used to colorize the shape, or change its global opacity. You can use sf::Color::Transparent to make the inside of the shape transparent, and have the outline alone. By default, the shape's fill color is opaque white.
- Parameters
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| color | New color of the shape |
- See also
getFillColor, setOutlineColor
◆ setOrigin()
| void sf::Transformable::setOrigin |
( |
Vector2f | origin | ) |
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inherited |
set the local origin of the object
The origin of an object defines the center point for all transformations (position, scale, rotation). The coordinates of this point must be relative to the top-left corner of the object, and ignore all transformations (position, scale, rotation). The default origin of a transformable object is (0, 0).
- Parameters
-
- See also
getOrigin
◆ setOutlineColor()
| void sf::Shape::setOutlineColor |
( |
Color | color | ) |
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inherited |
Set the outline color of the shape.
By default, the shape's outline color is opaque white.
- Parameters
-
| color | New outline color of the shape |
- See also
getOutlineColor, setFillColor
◆ setOutlineThickness()
| void sf::Shape::setOutlineThickness |
( |
float | thickness | ) |
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inherited |
Set the thickness of the shape's outline.
Note that negative values are allowed (so that the outline expands towards the center of the shape), and using zero disables the outline. By default, the outline thickness is 0.
- Parameters
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| thickness | New outline thickness |
- See also
getOutlineThickness
◆ setPointCount()
| void sf::CircleShape::setPointCount |
( |
std::size_t | count | ) |
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Set the number of points of the circle.
- Parameters
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| count | New number of points of the circle |
- See also
getPointCount
◆ setPosition()
| void sf::Transformable::setPosition |
( |
Vector2f | position | ) |
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inherited |
set the position of the object
This function completely overwrites the previous position. See the move function to apply an offset based on the previous position instead. The default position of a transformable object is (0, 0).
- Parameters
-
- See also
move, getPosition
◆ setRadius()
| void sf::CircleShape::setRadius |
( |
float | radius | ) |
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Set the radius of the circle.
- Parameters
-
| radius | New radius of the circle |
- See also
getRadius
◆ setRotation()
| void sf::Transformable::setRotation |
( |
Angle | angle | ) |
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inherited |
set the orientation of the object
This function completely overwrites the previous rotation. See the rotate function to add an angle based on the previous rotation instead. The default rotation of a transformable object is 0.
- Parameters
-
- See also
rotate, getRotation
◆ setScale()
| void sf::Transformable::setScale |
( |
Vector2f | factors | ) |
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inherited |
set the scale factors of the object
This function completely overwrites the previous scale. See the scale function to add a factor based on the previous scale instead. The default scale of a transformable object is (1, 1).
- Parameters
-
- See also
scale, getScale
◆ setTexture()
| void sf::Shape::setTexture |
( |
const Texture * | texture, |
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bool | resetRect = false ) |
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inherited |
Change the source texture of the shape.
The texture argument refers to a texture that must exist as long as the shape uses it. Indeed, the shape doesn't store its own copy of the texture, but rather keeps a pointer to the one that you passed to this function. If the source texture is destroyed and the shape tries to use it, the behavior is undefined. texture can be a null pointer to disable texturing. If resetRect is true, the TextureRect property of the shape is automatically adjusted to the size of the new texture. If it is false, the texture rect is left unchanged.
- Parameters
-
| texture | New texture |
| resetRect | Should the texture rect be reset to the size of the new texture? |
- See also
getTexture, setTextureRect
◆ setTextureRect()
| void sf::Shape::setTextureRect |
( |
const IntRect & | rect | ) |
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inherited |
Set the sub-rectangle of the texture that the shape will display.
The texture rect is useful when you don't want to display the whole texture, but rather a part of it. By default, the texture rect covers the entire texture.
- Parameters
-
| rect | Rectangle defining the region of the texture to display |
- See also
getTextureRect, setTexture
◆ update()
| void sf::Shape::update |
( |
| ) |
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protectedinherited |
Recompute the internal geometry of the shape.
This function must be called by the derived class every time the shape's points change (i.e. the result of either getPointCount or getPoint is different).
The documentation for this class was generated from the following file:
