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Bindings - other languages => D => Topic started by: joelcnz on February 02, 2016, 05:48:26 am

Title: Rotate with a set pivot point, and get rotation
Post by: joelcnz on February 02, 2016, 05:48:26 am

SFML doesn't seem to have a pivot setting. I want to rotate a sprite from its centre.

Also, how do you do relative rotation on a sprite? Only one kind of rotation works - object.rotation(90);.

Title: Re: Rotate with a set pivot point, and get rotation
Post by: Hapax on February 02, 2016, 06:44:18 am

Quote from: joelcnz on February 02, 2016, 05:48:26 am

SFML doesn't seem to have a pivot setting. I want to rotate a sprite from its centre.

It does:
http://www.sfml-dev.org/documentation/2.3.2/classsf_1_1Transformable.php#aa93a835ffbf3bee2098dfbbc695a7f05

Quote from: joelcnz on February 02, 2016, 05:48:26 am

Also, how do you do relative rotation on a sprite? Only one kind of rotation works - object.rotation(90);.

Relative rotations can be done with rotate() (http://www.sfml-dev.org/documentation/2.3.2/classsf_1_1Transformable.php#af8a5ffddc0d93f238fee3bf8efe1ebda)
(or setRotation() in conjunction with getRotation())

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sprite.setOrigin(sf::Vector2f(sprite.getLocalBounds().width, sprite.getLocalBounds().height) / 2.f); // rotate around the sprite's centre
sprite.rotate(10); // rotate 10 degrees from its current rotation
sprite.setRotation(sprite.getRotation() + 10); // also rotates 10 degrees from its current rotation

Title: Re: Rotate with a set pivot point, and get rotation
Post by: joelcnz on February 02, 2016, 07:35:55 am

Thanks for the help with sprite origin for rotating.

These 2 below don't work for me (using D):
rotate(10);
sprite.setRotation(sprite.getRotation() + 90);

sprite.rotation(90); works instead of sprite.setRotation(90); for me.

Title: Re: Rotate with a set pivot point, and get rotation
Post by: Hapax on February 03, 2016, 08:37:20 am

Sorry. I didn't notice that this was posted in a D binding forum.

I didn't realise that the commands were that different:
http://jebbs.github.io/DSFML/dsfml/graphics/transformable.html

I'm not sure how to get the current rotation but it looks like it might be something like:

sprite.rotation(sprite.rotation() + 10);

Title: Re: Rotate with a set pivot point, and get rotation
Post by: joelcnz on February 08, 2016, 08:00:43 am

Thanks Hapax.  :) I should've known the rotation thing.