Base class for textured shapes with outline. More...

#include <gf/Shape.h>

Inheritance diagram for gf::Shape:

Public Member Functions
	Shape ()
	Default constructor. More...

void	setTexture (const Texture &texture, bool resetRect=false)
	Change the source texture of the shape. More...

const Texture *	getTexture () const
	Get the source texture of the shape. More...

void	unsetTexture ()
	Unset the source texture of the shape. More...

void	setTextureRect (const RectF &rect)
	Set the sub-rectangle of the texture that the shape will display. More...

const RectF &	getTextureRect () const
	Get the sub-rectangle of the texture displayed by the shape. More...

void	setColor (const Color4f &color)
	Set the fill color of the shape. More...

const Color4f &	getColor () const
	Get the fill color of the shape. More...

void	setOutlineColor (const Color4f &color)
	Set the outline color of the shape. More...

const Color4f &	getOutlineColor () const
	Get the outline color of the shape. More...

void	setOutlineThickness (float thickness)
	Set the thickness of the shape's outline. More...

float	getOutlineThickness () const
	Get the outline thickness of the shape. More...

virtual std::size_t	getPointCount () const =0
	Get the total number of points of the shape. More...

virtual Vector2f	getPoint (std::size_t index) const =0
	Get a point of the shape. More...

RectF	getLocalBounds () const
	Get the local bounding rectangle of the entity. More...

void	setAnchor (Anchor anchor)
	Set the anchor origin of the entity. More...

VertexBuffer	commitGeometry () const
	Create a buffer with the current geometry. More...

VertexBuffer	commitOutlineGeometry () const
	Create a buffer with the current outline geometry. More...

virtual void	draw (RenderTarget &target, RenderStates states) override
	Draw the object to a render target. More...

Public Member Functions inherited from gf::Transformable
	Transformable ()
	Default constructor. More...

void	setOrigin (Vector2f origin)
	Set the local origin of the object. More...

Vector2f	getOrigin () const
	Get the local origin of the object. More...

void	setPosition (Vector2f position)
	Set the position of the object. More...

Vector2f	getPosition () const
	Get the position of the object. More...

void	move (Vector2f offset)
	Move the object by a given offset. More...

void	setRotation (float angle)
	Set the orientation of the object. More...

float	getRotation () const
	Get the orientation of the object. More...

void	rotate (float angle)
	Rotate the object. More...

void	setScale (Vector2f factors)
	Set the scale factors of the object. More...

void	setScale (float factor)
	Set the scale factor of the object. More...

Vector2f	getScale () const
	Get the current scale of the object. More...

void	scale (Vector2f factors)
	Scale the object. More...

void	scale (float factor)
	Scale the object. More...

Matrix3f	getTransform () const
	Get the combined transform of the object. More...

Matrix3f	getInverseTransform () const
	Get the inverse of the combined transform of the object. More...

Public Member Functions inherited from gf::Drawable
virtual	~Drawable ()
	Virtual desctructor. More...

Protected Member Functions
void	updateGeometry ()
	Recompute the internal geometry of the shape. More...

Protected Member Functions inherited from gf::Transformable
void	setOriginFromAnchorAndBounds (Anchor anchor, const RectF &bounds)
	Set the origin from an anchor and bounds. More...

Detailed Description

Base class for textured shapes with outline.

gf::Shape is a drawable class that allows to define and display a custom convex shape on a render target. It's only an abstract base, it needs to be specialized for concrete types of shapes (circle, rectangle, convex polygon, star, ...).

In addition to the attributes provided by the specialized shape classes, a shape always has the following attributes:

a texture
a texture rectangle
a fill color
an outline color
an outline thickness

Each feature is optional, and can be disabled easily:

the texture can be null
the fill/outline colors can be transparent
the outline thickness can be zero

You can write your own derived shape class, there are only two virtual functions to override:

getPointCount() must return the number of points of the shape
getPoint() must return the points of the shape

See also: gf::RectangleShape, gf::CircleShape, gf::ConvexShape; gf::Transformable

Constructor & Destructor Documentation

gf::Shape::Shape ( )

Default constructor.

Member Function Documentation

VertexBuffer gf::Shape::commitGeometry ( ) const

Create a buffer with the current geometry.

The geometry is uploaded in the graphics memory so that it's faster to draw.

Returns: A buffer with the current geometry

VertexBuffer gf::Shape::commitOutlineGeometry ( ) const

Create a buffer with the current outline geometry.

The geometry is uploaded in the graphics memory so that it's faster to draw.

Returns: A buffer with the current outline geometry

virtual void gf::Shape::draw	(	RenderTarget &	target,
		RenderStates	states
	)

overridevirtual

Draw the object to a render target.

This is a pure virtual function that has to be implemented by the derived class to define how the drawable should be drawn.

Parameters

target	Render target to draw to
states	Current render states

Implements gf::Drawable.

const Color4f& gf::Shape::getColor ( ) const

inline

Get the fill color of the shape.

Returns: Fill color of the shape

See also: setColor()

RectF gf::Shape::getLocalBounds ( ) const

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

const Color4f& gf::Shape::getOutlineColor ( ) const

inline

Get the outline color of the shape.

Returns: Outline color of the shape

See also: setOutlineColor()

float gf::Shape::getOutlineThickness ( ) const

inline

Get the outline thickness of the shape.

Returns: Outline thickness of the shape

See also: setOutlineThickness()

virtual Vector2f gf::Shape::getPoint ( std::size_t index ) const

pure virtual

Get a point of the shape.

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

index Index of the point to get, in range \( [0, n-1] \) where \( n \) is the number of points of the shape.

Returns: index-th point of the shape

See also: getPointCount()

Implemented in gf::RoundedRectangleShape, gf::StarShape, gf::ConvexShape, gf::CircleShape, and gf::RectangleShape.

virtual std::size_t gf::Shape::getPointCount ( ) const

pure virtual

Get the total number of points of the shape.

Returns: Number of points of the shape

See also: getPoint()

Implemented in gf::RoundedRectangleShape, gf::StarShape, gf::ConvexShape, gf::CircleShape, and gf::RectangleShape.

const Texture* gf::Shape::getTexture ( ) const

inline

Get the source texture of the shape.

If the shape has no source texture, a nullptr pointer 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()

const RectF& gf::Shape::getTextureRect ( ) const

inline

Get the sub-rectangle of the texture displayed by the shape.

Returns: Texture rectangle of the shape

See also: setTextureRect()

void gf::Shape::setAnchor ( Anchor anchor )

Set the anchor origin of the entity.

Compute the origin of the entity based on the local bounds and the specified anchor. Internally, this function calls Transformable::setOrigin().

Parameters

anchor The anchor of the entity

See also: getLocalBounds(), Transformable::setOrigin()

void gf::Shape::setColor ( const Color4f & color )

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 gf::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

color New color of the shape

See also: getColor(), setOutlineColor()

void gf::Shape::setOutlineColor ( const Color4f & color )

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(), setColor()

void gf::Shape::setOutlineThickness ( float thickness )

Set the thickness of the shape's outline.

By default, the outline thickness is \( 0 \).

Parameters

thickness New outline thickness

See also: getOutlineThickness()

void gf::Shape::setTexture	(	const Texture &	texture,
		bool	resetRect = `false`
	)

Change the source texture of the shape.

The texture 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.

If resetRect is true, the texture rect 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()

void gf::Shape::setTextureRect ( const RectF & rect )

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()

void gf::Shape::unsetTexture ( )

Unset the source texture of the shape.

After a call to this function, the shape has no source texture.

See also: setTexture()

void gf::Shape::updateGeometry ( )

protected

Recompute the internal geometry of the shape.

This function must be called by the derived class everytime the shape's points change (i.e. the result of either getPointCount() or getPoint() is different).

Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation