the coordinate system in SFML - Help needed!!

[supdawg]

ok so i have a general question about the coordinate system in SFML 2.

i understand the basics (such as the inverted y-axis).

i have read the documentation.

so i have randomly used getLocalBounds() and getGlobalBounds() mainly for setting the origin of a Sprite at its center. Sometimes i experience weird behaviour and so i really want to know what exactly the two aforementioned functions do, and how they relate to the coordinate system.

i understand there are different types of coordinates (global and world coordinates i believe?). can someone briefly describe what exactly they are because i cant seem to understand how sprite position works in terms of coordinates and pixels and screen height/width.

if someone could clarify these few things i would feel much more at ease working with a window and positioning things.

[eXpl0it3r]

getLocalBounds() returns the bounds without any transformation applied, where as getGlobalBounds() returns the bounding box with the transformation applied. E.g. if you rotate a sprite, the local bounds won't change, but the global bounds now is a axis aligned bounding box of the sprite.
Further more the position is usually at the top left corner of the sprite, unless you defined a different origin, all the transformation will happen around this corner.
Then there's the whole sf::View thing, which can be quite unintuitive in the beginning, that's why I've created a tutorial, which should give you some intuition on the topic.

There are also other topics surrounding your question, so feel free to search a bit further.

[supdawg]

ok so normally what i do is set the origin to the center of the object and i usually use getLocalBounds() because i havent yet applied any transformations. is that the correct approach?

so what your saying is that if my sprite is rotated, then getGlobalBounds() will return a rotated rectangle of some sort?

and what are the different coordinate systems. that bit was confusing me too.

[krzat]

so what your saying is that if my sprite is rotated, then getGlobalBounds() will return a rotated rectangle of some sort?

It will return bounding rectangle: