- cpp3ds
- Sprite
Drawable representation of a texture, with its own transformations, color, etc. More...
#include <Sprite.hpp>
Public Member Functions | |
| Sprite () | |
| Default constructor. More... | |
| Sprite (const Texture &texture) | |
| Construct the sprite from a source texture. More... | |
| Sprite (const Texture &texture, const IntRect &rectangle) | |
| Construct the sprite from a sub-rectangle of a source texture. More... | |
| void | setTexture (const Texture &texture, bool resetRect=false) |
| Change the source texture of the sprite. More... | |
| void | setTextureRect (const IntRect &rectangle) |
| Set the sub-rectangle of the texture that the sprite will display. More... | |
| void | setColor (const Color &color) |
| Set the global color of the sprite. More... | |
| const Texture * | getTexture () const |
| Get the source texture of the sprite. More... | |
| const IntRect & | getTextureRect () const |
| Get the sub-rectangle of the texture displayed by the sprite. More... | |
| const Color & | getColor () const |
| Get the global color of the sprite. More... | |
| FloatRect | getLocalBounds () const |
| Get the local bounding rectangle of the entity. More... | |
| FloatRect | getGlobalBounds () const |
| Get the global bounding rectangle of the entity. More... | |
| void | setPosition (float x, float y) |
| set the position of the object More... | |
| void | setPosition (const Vector2f &position) |
| set the position of the object More... | |
| void | setRotation (float angle) |
| set the orientation of the object More... | |
| void | setScale (float factorX, float factorY) |
| set the scale factors of the object More... | |
| void | setScale (const Vector2f &factors) |
| set the scale factors of the object More... | |
| void | setOrigin (float x, float y) |
| set the local origin of the object More... | |
| void | setOrigin (const Vector2f &origin) |
| set the local origin of the object More... | |
| const Vector2f & | getPosition () const |
| get the position of the object More... | |
| float | getRotation () const |
| get the orientation of the object More... | |
| const Vector2f & | getScale () const |
| get the current scale of the object More... | |
| const Vector2f & | getOrigin () const |
| get the local origin of the object More... | |
| void | move (float offsetX, float offsetY) |
| Move the object by a given offset. More... | |
| void | move (const Vector2f &offset) |
| Move the object by a given offset. More... | |
| void | rotate (float angle) |
| Rotate the object. More... | |
| void | scale (float factorX, float factorY) |
| Scale the object. More... | |
| void | scale (const Vector2f &factor) |
| Scale the object. More... | |
| const Transform & | getTransform () const |
| get the combined transform of the object More... | |
| const Transform & | getInverseTransform () const |
| get the inverse of the combined transform of the object More... | |
Drawable representation of a texture, with its own transformations, color, etc.
cpp3ds::Sprite is a drawable class that allows to easily display a texture (or a part of it) on a render target.
It inherits all the functions from cpp3ds::Transformable: position, rotation, scale, origin. It also adds sprite-specific properties such as the texture to use, the part of it to display, and some convenience functions to change the overall color of the sprite, or to get its bounding rectangle.
cpp3ds::Sprite works in combination with the cpp3ds::Texture class, which loads and provides the pixel data of a given texture.
The separation of cpp3ds::Sprite and cpp3ds::Texture allows more flexibility and better performances: indeed a cpp3ds::Texture is a heavy resource, and any operation on it is slow (often too slow for real-time applications). On the other side, a cpp3ds::Sprite is a lightweight object which can use the pixel data of a cpp3ds::Texture and draw it with its own transformation/color/blending attributes.
It is important to note that the cpp3ds::Sprite instance doesn't copy the texture that it uses, it only keeps a reference to it. Thus, a cpp3ds::Texture must not be destroyed while it is used by a cpp3ds::Sprite (i.e. never write a function that uses a local cpp3ds::Texture instance for creating a sprite).
See also the note on coordinates and undistorted rendering in cpp3ds::Transformable.
Usage example:
Definition at line 46 of file Sprite.hpp.
| cpp3ds::Sprite::Sprite | ( | ) |
Default constructor.
Creates an empty sprite with no source texture.
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explicit |
Construct the sprite from a sub-rectangle of a source texture.
| texture | Source texture |
| rectangle | Sub-rectangle of the texture to assign to the sprite |
| const Color& cpp3ds::Sprite::getColor | ( | ) | const |
| FloatRect cpp3ds::Sprite::getGlobalBounds | ( | ) | const |
Get the global bounding rectangle of the entity.
The returned rectangle is in global coordinates, which means that it takes in account the transformations (translation, rotation, scale, ...) that are applied to the entity. In other words, this function returns the bounds of the sprite in the global 2D world's coordinate system.
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inherited |
get the inverse of the combined transform of the object
| FloatRect cpp3ds::Sprite::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.
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inherited |
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inherited |
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inherited |
get the orientation of the object
The rotation is always in the range [0, 360].
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inherited |
| const Texture* cpp3ds::Sprite::getTexture | ( | ) | const |
Get the source texture of the sprite.
If the sprite has no source texture, a NULL pointer is returned. The returned pointer is const, which means that you can't modify the texture when you retrieve it with this function.
| const IntRect& cpp3ds::Sprite::getTextureRect | ( | ) | const |
Get the sub-rectangle of the texture displayed by the sprite.
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inherited |
get the combined transform of the object
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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:
| offsetX | X offset |
| offsetY | Y 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:
| offset | Offset |
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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:
| angle | Angle of rotation, in degrees |
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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:
| factorX | Horizontal scale factor |
| factorY | Vertical scale 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:
| factor | Scale factors |
| void cpp3ds::Sprite::setColor | ( | const Color & | color | ) |
Set the global color of the sprite.
This color is modulated (multiplied) with the sprite's texture. It can be used to colorize the sprite, or change its global opacity. By default, the sprite's color is opaque white.
| color | New color of the sprite |
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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).
| x | X coordinate of the new origin |
| y | Y coordinate of the new 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).
| origin | New origin |
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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).
| x | X coordinate of the new position |
| y | Y coordinate of the new 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).
| position | New position |
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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.
| angle | New rotation, in degrees |
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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).
| factorX | New horizontal scale factor |
| factorY | New vertical scale factor |
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inherited |
| void cpp3ds::Sprite::setTexture | ( | const Texture & | texture, |
| bool | resetRect = false |
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| ) |
Change the source texture of the sprite.
The texture argument refers to a texture that must exist as long as the sprite uses it. Indeed, the sprite 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 sprite tries to use it, the behaviour is undefined. If resetRect is true, the TextureRect property of the sprite is automatically adjusted to the size of the new texture. If it is false, the texture rect is left unchanged.
| texture | New texture |
| resetRect | Should the texture rect be reset to the size of the new texture? |
| void cpp3ds::Sprite::setTextureRect | ( | const IntRect & | rectangle | ) |
Set the sub-rectangle of the texture that the sprite 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.
| rectangle | Rectangle defining the region of the texture to display |